A sintering wet fuel sorting method

Abstract

The application discloses a sintering wet fuel sorting method and relates to the technical field of bulk powder sorting, and comprises the following steps: obtaining original wet fuel, the moisture content of the original wet fuel is 7-20%, and the particle size of the original wet fuel is not greater than 5 mm; if the classification particle size requirement is not less than 0.5 mm, obtaining coarse material I and fine material I; if the classification particle size requirement is not greater than 0.15 mm, obtaining coarse material II and fine material II; and step S23 specifically comprises: if the classification particle size requirement is 0.15-0.5 mm, obtaining coarse material III and fine material III. The sintering wet fuel sorting method can accurately separate the wet fuel based on the characteristics of the wet fuel and the self-adaptive selection of the sorting method according to the classification particle size requirement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of raw material preparation in the steel and iron metallurgical industry, in particular, to a sintering wet fuel sorting method. BACKGROUND

[0002] Solid fuel is one of the main fuels used in the metallurgical sintering process, and is also the main source of carbon emissions in the steel and iron metallurgical industry. The particle size composition of sintering solid fuel is an important parameter that affects the sintering effect. The particle size of fuel coal used in the sintering machine is required to be limited within a certain range, and the appropriate particle size is between 0.5 mm and 3 mm. Both too coarse and too fine particle size (less than 0.5 mm or greater than 3 mm) of solid fuel will have a great impact on the utilization efficiency of fuel and the performance parameters of sintered ore. Therefore, in the sintering process, it is generally required to control the fuel particle size within the range of 0.5 to 3 mm.

[0003] Wet fine particle coal has the characteristics of high water content, too fine particle size, and small difference between particle sizes, and is easily affected by liquid bridge force, resulting in strong adhesion between particles, mainly manifested as small particles adhering to large particles or mutual agglomeration between small particles, which seriously affects the screening efficiency. Related literature results show that when the moisture content of the material reaches 10%, the screening efficiency is less than 50%. The existing wet fine particle material screening equipment mainly includes Boshen screen, Chizhang screen, string screen, and probability screen, but the minimum particle size of classification is above 3 mm. Linear vibration screen and ultrasonic vibration screen are suitable for screening of fine particle powder materials, and require the moisture content of the material to be below 7%. Similarly, the air classification device also requires the moisture content of the material to be below 5% or even smaller. The mainstream sorting method for wet materials at present is wet screening, which requires a large amount of water and is not suitable in all situations.

[0004] For wet fine particle coal with moisture content in the range of 7% to 20% and particle size distribution in the range of 0 to 5 mm, the existing classification process and system are difficult to accurately separate. In view of this, it is necessary to propose a sintering wet fuel sorting method to solve or at least partially solve the above technical problems. SUMMARY

[0005] The sintering wet fuel sorting method provided by the present application solves the technical problem of low sorting precision of existing wet fine particle coal, which leads to low sintering utilization efficiency.

[0006] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0007] The application discloses a sintered wet fuel sorting method, and belongs to the technical field of sintered wet fuel sorting.

[0008] Further, the vibration frequency of the vibration conveying is 800-1000 times per minute; the beating frequency of the preliminary dispersion is 8000-10000 times per minute; the material thickness of the uniform distribution is 30-50 mm; the air temperature of the normal-temperature air is 20-30 degrees; and the air temperature of the hot air is 60-80 degrees.

[0009] Further, in step S21, the sintered wet fuel sorting system is used for air separation, the sintered wet fuel sorting system comprises a sintered fuel sorting device, the sintered fuel sorting device comprises an air separation feeding mechanism, an air separation material sorting mechanism and an air separation air supply mechanism, the air separation material sorting mechanism has an air separation material inlet, an air separation dust outlet and an air separation discharge outlet, the air separation feeding mechanism is arranged at the input side of the air separation material sorting mechanism, the air separation air supply mechanism is arranged between the air separation material inlet and the air separation discharge outlet, the air separation feeding mechanism is used for feeding material to the air separation material inlet, the air separation material sorting mechanism comprises an air separation base frame, an air separation vibrating conveying table, an air separation vibrating driving mechanism, an air separation multi-stage sorting unit, an air separation cover and an air separation material dispersing unit, the air separation vibrating conveying table is arranged on the air separation base frame, the air separation vibrating driving mechanism is used for driving the air separation vibrating conveying table to vibrate, the air separation multi-stage sorting unit is fixedly arranged on the air separation vibrating conveying table and used for conveying material with the vibration of the air separation vibrating conveying table, the air separation cover is arranged on the air separation base frame and forms an air separation working chamber together with the air separation multi-stage sorting unit, the air separation material inlet and the air separation dust outlet are arranged at the upstream and downstream of the air separation cover respectively, the air separation air supply mechanism is arranged below the air separation multi-stage sorting unit, the air separation air supply mechanism is used for supplying air into the air separation working chamber from below the air separation multi-stage sorting unit, the air separation material dispersing unit is used for driving the head of the air separation multi-stage sorting unit to vibrate and dispersing the water-containing agglomerated material at the head, the dispersed material is vibrated and conveyed on the surface of the air separation multi-stage sorting unit and is subjected to air separation in the air separation working chamber, the dust material after air separation is output through the air separation dust outlet, and the granular material after air separation is output to outside the air separation working chamber through the tail of the air separation multi-stage sorting unit.

[0010] Further, the air separation multi-stage sorting unit comprises an air separation material dispersing and conveying assembly, an air separation first-stage sorting assembly, an air separation second-stage sorting assembly and an air separation third-stage sorting assembly arranged in sequence along the conveying direction, the air separation material dispersing and conveying assembly, the air separation first-stage sorting assembly, the air separation second-stage sorting assembly and the air separation third-stage sorting assembly are all fixedly arranged on the air separation vibrating conveying table, the air separation material inlet is above the air separation material dispersing and conveying assembly and at the input side of the air separation material dispersing and conveying assembly, the air separation material dispersing unit comprises an air separation material conveying plate and an air separation conveying and dispersing plate arranged in sequence along the conveying direction, the air separation material inlet is above the air separation material conveying plate, the air separation conveying and dispersing plate is arranged between the air separation material conveying plate and the air separation second-stage sorting assembly and is inclined downward along the conveying direction, and the air separation material dispersing unit is used for driving the air separation conveying and dispersing plate to vibrate from the back of the air separation conveying and dispersing plate.

[0011] Further, the air separation first cloth air distribution plate comprises an air separation air cap and an air separation upper layer plate and an air separation lower layer plate arranged in the height direction, the air separation air cap is fixedly arranged between the air separation upper layer plate and the air separation lower layer plate, a plurality of air separation air caps are arranged in an array, the air separation air cap comprises an air separation air inlet section, an air separation circular table section and an air separation circular ring section arranged coaxially, the air separation air inlet section is provided with an air inlet hole penetrating in the axial direction, the air separation circular table section is provided with an annular uniform flow chamber arranged in a ring shape, the air separation circular ring section is provided with a circular ring air outlet chamber, the top surface of the air separation circular ring section is provided with an air outlet hole in communication with the circular ring air outlet chamber, a plurality of air outlet holes are arranged in the circumferential direction of the air separation circular ring section, and the air inlet hole, the annular uniform flow chamber and the circular ring air outlet chamber are in communication

[0012] Further, the air separation second grade selection and feeding assembly comprises an air separation second grade cloth air distribution plate and an air separation second grade rectifying grid arranged in sequence along the conveying direction, the air separation second grade rectifying grid is arranged in sequence along the conveying direction and is arranged between the air separation second grade cloth air distribution plate and the air separation third grade selection and feeding assembly, the air separation third grade selection and feeding assembly comprises an air separation third grade cloth air distribution plate and an air separation feeding conveying plate arranged in sequence along the conveying direction, and the air separation feeding conveying plate is downstream of the air separation third grade cloth air distribution plate and extends out of the air separation working chamber.

[0013] Further, in step S22, air separation is performed by using a first sintered wet fuel screening system, the first sintered wet fuel screening system comprises a first sintered wet fuel screening device and a heater, and the heater is used to provide hot air for the first sintered wet fuel screening device.

[0014] Further, in step S23, air separation is performed by using a second sintered wet fuel screening system, the second sintered wet fuel screening system comprises a second sintered wet fuel screening device and a heater, and the heater is used to provide hot air for the second sintered wet fuel screening device.

[0015] Further, the first sintered wet fuel screening device comprises a first screening bulk material distribution unit, a first first grade screening unit, a first second grade screening unit, a first third grade screening unit and a first air cover arranged in sequence along the conveying direction, the first screening bulk material distribution unit has a first inclined downward conveying plate, the back surface of the first inclined downward conveying plate is provided with a first vibrator, the bottom of the first first grade screening unit is provided with a first first grade hot air chamber, the top of the first first grade screening unit is provided with a first air separation first grade material blocking assembly, the bottom of the first second grade screening unit is provided with a first second grade normal temperature chamber, the top of the first second grade screening unit is provided with a first second grade material blocking plate assembly, the bottom of the first second grade screening unit is provided with a first third grade normal temperature chamber, and the top of the first third grade screening unit is provided with a powder selection blade assembly.

[0016] Further, the second sintering wet fuel screening device comprises a second screening bulk material distributing unit, a second first-stage screening unit, a second second-stage screening unit, a second third-stage screening unit and a second air cover arranged in sequence along the conveying direction, the second screening bulk material distributing unit is provided with a second inclined downward conveying plate, the back surface of the second inclined downward conveying plate is arranged with a second vibrator, the bottom of the second first-stage screening unit is provided with a second first-stage hot air air chamber, the top of the second first-stage screening unit is arranged with a second air screening first-stage material blocking assembly, the bottom of the second second-stage screening unit is provided with a second second-stage normal temperature chamber, the top of the second second-stage screening unit is arranged with a second second-stage material blocking plate assembly, the bottom of the second second-stage screening unit is provided with a second third-stage normal temperature chamber, and the top of the second third-stage screening unit is arranged with a grading impeller assembly on the second air cover.

[0017] The present application has the following beneficial effects:

[0018] The sintering wet fuel screening method provided by the present application adaptively selects a screening method according to the grading particle size requirement, if the grading particle size requirement is not less than 0.5 mm, in the process of vibration conveying, the process of beating, initial dispersion and uniform distribution, fluidization and loosening by normal temperature air, material agglomeration breaking and fluidization grading is used to realize material screening, and coarse material one and fine material one are separated; if the grading particle size requirement is less than 0.15 mm, in the process of vibration conveying, the process of beating, initial dispersion and uniform distribution, fluidization and loosening by hot air, material agglomeration breaking, fluidization grading and planar spiral airflow is used to realize material screening, and coarse material two and fine material two are separated; if the grading particle size requirement is 0.15-0.5 mm, in the process of vibration conveying, the process of beating, initial dispersion and uniform distribution, fluidization and loosening by hot air, material agglomeration breaking, fluidization grading and gravity grading is used to realize material screening, and coarse material three and fine material two are separated. The sintering wet fuel screening method provided by the present application adaptively selects a screening method based on the characteristics of wet fuel and the grading particle size requirement, and can realize accurate separation.

[0019] In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The present application is not limited by the improper interpretation of the accompanying drawings. In the drawings:

[0021] Figure 1 is a flowchart of the sintering wet fuel screening method in an embodiment of the present application;

[0022] Figure 2 is a structural schematic diagram of a sintering wet fuel sorting system in one embodiment of the present application;

[0023] Figure 3 is Figure 2 a structural schematic diagram of a sintering fuel sorting device in one embodiment of the present application;

[0024] 4 is a structural schematic diagram of a first sintering wet fuel screening system in another embodiment of the present application;

[0025] Figure 5 is Figure 4 a structural schematic diagram of a first sintering wet fuel screening device in one embodiment of the present application;

[0026] Figure 6 is a structural schematic diagram of a second sintering wet fuel screening device in another embodiment of the present application;

[0027] Figure 7 is a structural schematic diagram of a sintering fuel sorting device in another embodiment of the present application;

[0028] Figure 8 is Figure 7 an enlarged view of A in

[0029] Figure 9 is Figure 7 a structural schematic diagram of a first-stage air distribution plate of an air screening device of

[0030] Figure 10 is Figure 9 a three-dimensional structural schematic diagram of an air screening cap in

[0031] Figure 11 is Figure 9 a structural schematic diagram of a material impact and scattering assembly of an air screening device of

[0032] Figure 12 is Figure 7 a three-dimensional structural schematic diagram of a first-stage material blocking assembly of an air screening device of

[0033] Figure 13 is Figure 7 a planar structural schematic diagram of a first-stage material blocking assembly of an air screening device of

[0034] Legend:

[0035] 100, sinter fuel sorting device; 10, air separation feeding mechanism; 11, stock bin; 12, round roller distributor; 13, opening adjuster; 20, air separation material sorting mechanism; 201, air separation material inlet; 202, air separation dust outlet; 203, air separation discharge outlet; 21, air separation base frame; 22, air separation vibration conveying table; 23, air separation vibration driving mechanism; 24, air separation multi-stage sorting unit; 241, air separation material distribution and scattering conveying assembly; 2411, air separation material conveying plate; 2412, air separation conveying and scattering plate; 242, air separation first-stage sorting conveying assembly; 2421, air separation first-stage air distribution plate; 24211, air separation air cap; 2422, air separation first-stage rectifying grid; 243, air separation second-stage sorting conveying assembly; 2431, air separation second-stage air distribution plate; 2432, air separation second-stage rectifying grid; 244, air separation third-stage sorting discharge assembly; 2441, air separation third-stage air distribution plate; 2442, air separation discharge conveying plate; 25, air separation cover; 251, air separation upper cover body; 252, air separation lower cover body; 253, air separation baffle scattering unit; 2531, air separation first-stage material blocking assembly; 25311, first hoisting hanging rod; 25312, first hoisting frame; 25313, first baffle plate; 25314, second baffle plate; 25315, window adjusting piece; 2532, air separation second-stage material blocking assembly; 26, air separation material distribution and scattering unit; 27, air separation material guiding and discharging mechanism; 271, air separation material guiding and discharging box; 30, air separation air feeding mechanism; 31, air separation first-stage air feeding box; 32, air separation second-stage air feeding box; 33, air separation third-stage air feeding box; 34, air feeding branch pipe; 35, air feeding main pipe; 36, air blower; 37, flow adjusting valve;

[0036] 200, first sinter wet fuel screening device; 210, first screening bulk material distribution unit; 220, first first-stage screening unit; 230, first second-stage screening unit; 240, first third-stage screening unit; 250, first cover; 260, powder selection blade assembly; 400, heater;

[0037] 300, second sinter wet fuel screening device; 210, second screening bulk material distribution unit; 220, second first-stage screening unit; 330, second second-stage screening unit; 340, second third-stage screening unit; 350, second cover; 360, grading impeller assembly. DETAILED DESCRIPTION

[0038] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the scope of the application.

[0039] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0040] It should be noted that all the direction indications (such as up, down, left, right, front, back, and the like) in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications also change accordingly.

[0041] In addition, the descriptions of “first”, “second” and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is also not within the scope of protection required by the present application.

[0042] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , and Figure 13As shown, the application provides a sintering wet fuel sorting method, which comprises the following steps: S10, obtaining original wet fuel, the moisture content of the original wet fuel is 7% to 20%, and the particle size of the original wet fuel is not greater than 5 mm; S20, if the classified particle size requirement is not less than 0.5 mm, then step S21 is entered; if the classified particle size requirement is not greater than 0.15 mm, then step S22 is entered; if the classified particle size requirement is 0.15 to 0.5 mm, then step S23 is entered; step S21 specifically comprises the following steps: S211, carrying out preliminary dispersion and uniform distribution of materials in the vibration conveying process; S212, carrying out fluidized loosening based on normal temperature wind in the vibration conveying process; S213, dispersing agglomerated materials based on normal temperature wind in the vibration conveying process; S214, carrying out fluidized classification based on normal temperature wind in the vibration conveying process; separating and obtaining materials not less than 0.5 mm as coarse material one, and carrying out gas-solid separation on materials less than 0.5 mm to obtain fine material one; step S22 specifically comprises the following steps: S221, carrying out preliminary dispersion and uniform distribution of materials in the vibration conveying process; S222, carrying out fluidized drying based on hot wind in the vibration conveying process; S223, carrying out fluidized dispersion based on normal temperature wind in the vibration conveying process; S224, carrying out fluidized classification based on normal temperature wind in the vibration conveying process; S225, carrying out secondary classification by using a planar spiral airflow method, separating and obtaining materials not less than 0.15 mm as coarse material two, and carrying out gas-solid separation on materials less than 0.15 mm to obtain fine material two; step S23 specifically comprises the following steps: S231, carrying out preliminary dispersion and uniform distribution of materials in the vibration conveying process; S232, carrying out fluidized drying based on hot wind in the vibration conveying process; S233, carrying out fluidized dispersion based on normal temperature wind in the vibration conveying process; S234, carrying out fluidized classification based on normal temperature wind in the vibration conveying process; S334, carrying out secondary classification by using a gravity classification method, separating and obtaining materials of 0.15 to 0.5 mm as coarse material three, and carrying out gas-solid separation on materials less than 0.15 mm to obtain fine material three.

[0043] The application provides a sintering wet fuel sorting method, which is adaptive to select a grading process according to a grading particle size requirement; if the grading particle size requirement is not less than 0.5 mm, in the process of vibration conveying, the process of beating preliminary dispersion and uniform distribution of materials, fluidization loosening by using normal temperature air, material agglomeration breaking and fluidization grading is used to realize material sorting, and coarse material one and fine material one are separated; if the grading particle size requirement is less than 0.15 mm, in the process of vibration conveying, the process of beating preliminary dispersion and uniform distribution of materials, fluidization loosening by using hot air, material agglomeration breaking, fluidization grading and plane spiral airflow is used to realize material sorting, and coarse material two and fine material two are separated; if the grading particle size requirement is 0.15-0.5 mm, in the process of vibration conveying, the process of beating preliminary dispersion and uniform distribution of materials, fluidization loosening by using hot air, material agglomeration breaking, fluidization grading and gravity grading is used to realize material sorting, and coarse material three and fine material two are separated. The sintering wet fuel sorting method can accurately separate materials based on the characteristics of wet fuel and adaptive selection of the sorting method according to the grading particle size requirement.

[0044] Further, the vibration frequency of vibration conveying is 800-1000 times / min; the beating frequency of preliminary dispersion is 8000-10000 times / min; the material thickness of uniform distribution is 30-50 mm; the air temperature of normal temperature air is 20-30 degrees; and the air temperature of hot air is 60-80 degrees.

[0045] Please refer to Figure 2 and Figure 3Further, in step S21, the sintered wet fuel sorting system is used for winnowing, the sintered wet fuel sorting system comprises a sintered fuel sorting device 100, which comprises a winnowing feeding mechanism 10, a winnowing material sorting mechanism 20, and a winnowing air supply mechanism 30. The winnowing material sorting mechanism 20 has a winnowing material inlet 201, a winnowing dust outlet 202, and a winnowing discharge outlet 203. The winnowing feeding mechanism 10 is arranged at the input side of the winnowing material sorting mechanism 20. The winnowing air supply mechanism 30 is arranged between the winnowing material inlet 201 and the winnowing discharge outlet 203. The winnowing feeding mechanism 10 is used for feeding material to the winnowing material inlet 201. The winnowing material sorting mechanism 20 comprises a winnowing base frame 21, a winnowing vibrating conveying table 22, a winnowing vibrating driving mechanism 23, a winnowing multi-stage sorting unit 24, a winnowing air cover 25, and a winnowing material dispersing unit 26. The winnowing vibrating conveying table 22 is arranged on the winnowing base frame. The winnowing vibrating driving mechanism 23 is used for driving the winnowing vibrating conveying table 22 to vibrate. The winnowing multi-stage sorting unit 24 is fixedly arranged on the winnowing vibrating conveying table 22 and is used for conveying material together with the winnowing vibrating conveying table 22. The winnowing air cover 25 is arranged on the winnowing base frame and encloses the winnowing multi-stage sorting unit 24 to form a winnowing working chamber. The winnowing material inlet 201 and the winnowing dust outlet 202 are arranged upstream and downstream of the winnowing air cover 25, respectively. The winnowing air supply mechanism 30 is arranged below the winnowing multi-stage sorting unit 24 and is used for supplying air to the winnowing working chamber from below the winnowing multi-stage sorting unit 24. The winnowing material dispersing unit 26 is used for driving the head of the winnowing multi-stage sorting unit 24 to vibrate, so that the water-containing agglomerated material at the head is dispersed by vibration. The dispersed material is vibrated and conveyed on the surface of the winnowing multi-stage sorting unit 24 and is winnowed in the winnowing working chamber. The dust material after winnowing is output through the winnowing dust outlet 202. The granular material after winnowing is output from the tail of the winnowing multi-stage sorting unit 24 to the outside of the winnowing working chamber.

[0046] The sintering fuel sorting device 100 comprises a wind selection feeding mechanism 10, a wind selection material sorting mechanism 20 and a wind selection air supply mechanism 30, the wind selection material sorting mechanism 20 is provided with a wind selection material inlet 201, a wind selection dust outlet 202 and a wind selection discharge outlet 203, the wind selection material sorting mechanism 20 comprises a wind selection base frame 21, a wind selection vibration conveying table 22, a wind selection vibration driving mechanism 23, a wind selection multi-stage sorting unit 24, a wind selection air cover 25 and a wind selection material dispersing unit 26, the sintering wet fuel enters the wind selection multi-stage sorting unit 24 from the wind selection material inlet 201, the wind selection vibration driving mechanism 23 drives the wind selection vibration conveying table 22 to vibrate synchronously with the wind selection multi-stage sorting unit 24, the fluidized sorting is carried out under the action of the wind selection air supply mechanism 30 which supplies air from the bottom of the wind selection multi-stage sorting unit 24, the wind selection material dispersing unit 26 is used for driving the head of the wind selection multi-stage sorting unit 24 to vibrate and then dispersing the water-containing agglomerated material at the head, the dispersed material is vibrated and conveyed on the surface of the wind selection multi-stage sorting unit 24 and is subjected to multi-stage wind selection in the wind selection working chamber, the dust material after wind selection is output through the wind selection dust outlet 202, and the granular material after wind selection is output to the outside of the wind selection working chamber through the tail of the wind selection multi-stage sorting unit 24, thereby solving the technical problem of low sintering utilization efficiency caused by too much small than 0.5 mm particles in the sintering wet fuel.

[0047] The sintering fuel sorting device can fully separate the material less than 0.5 mm in the sintering wet fuel, solve the technical problem that the raw fuel after crushing is directly matched into the sintering production without any treatment, and cause too much small than 0.5 mm particles and low sintering utilization efficiency.

[0048] It can be understood that the wind selection vibration driving mechanism 23 can be a centrifugal driving machine, a connecting rod driving machine or a common vibration motor, as long as the wind selection vibration conveying table 22 is driven to reciprocate by the wind selection vibration driving mechanism 23 and the wind selection multi-stage sorting unit 24 is driven to convey the material.

[0049] It can be understood that the wind selection vibration conveying table 22 is movably arranged relative to the wind selection base frame 21 by arranging a reset spring between the wind selection vibration conveying table 22 and the wind selection base frame 21.

[0050] Please refer to Figure 3 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13Further, the air separation material dispersing unit comprises an air separation material dispersing and conveying assembly 241, an air separation first-stage sorting assembly 242, an air separation second-stage sorting assembly 243 and an air separation third-stage sorting assembly 244 arranged in sequence along the conveying direction, and the air separation material dispersing and conveying assembly 241, the air separation first-stage sorting assembly 242, the air separation second-stage sorting assembly 243 and the air separation third-stage sorting assembly 244 are fixedly arranged on the air separation vibrating conveying table 22, the air separation material inlet 201 is above the air separation material dispersing and conveying assembly 241 and is at the input side of the air separation material dispersing and conveying assembly 241, the air separation material dispersing and conveying unit comprises an air separation material conveying plate 2411 and an air separation conveying and dispersing plate 2412 arranged in sequence along the conveying direction, the air separation material inlet 201 is above the air separation material conveying plate 2411, and the air separation conveying and dispersing plate 2412 is arranged downwardly inclined along the conveying direction between the air separation material conveying plate 2411 and the air separation second-stage sorting assembly, and the air separation material dispersing and conveying unit 26 is used for driving the air separation conveying and dispersing plate 2412 to vibrate from the back of the air separation conveying and dispersing plate 2412. It can be understood that, in the scheme of the present application, the air separation material conveying plate 2411 is arranged horizontally, and the air separation material conveying plate 2411 and the air separation conveying and dispersing plate 2412 are both blind plates. In specific implementation, the sorting process comprises agglomerated material dispersing, fluidized layering, accurate grading, vibrating conveying and the like, the agglomerated material dispersing is mainly realized by the air separation material dispersing and conveying assembly 241, the fluidized layering is mainly realized by the air separation first-stage sorting assembly 242, the air separation second-stage sorting assembly 243 and / or the air separation baffle dispersing unit 253 under the action of wind, and the accurate grading is mainly realized by the air separation third-stage sorting assembly 244 under the action of wind.

[0051] Further, the air separation material dispersing unit comprises a hitting support, a hitting vibrating rod and a hitting driver, the hitting driver is fixedly arranged on the air separation base frame 21, the hitting support is fixedly arranged on the air separation vibrating conveying table 22, the first end of the hitting vibrating rod is fixedly arranged on the hitting support and is electrically connected with the hitting driver, and the second end of the hitting vibrating rod is arranged from the back of the air separation conveying and dispersing plate 2412 towards the air separation conveying and dispersing plate 2412.

[0052] Further, the hitting vibrating rod is arranged along a direction perpendicular to the air separation conveying and dispersing plate 2412, and a plurality of hitting vibrating rods are arranged in the width direction of the air separation conveying and dispersing plate 2412.

[0053] More preferably, the hitting vibrating rod drives the air separation conveying and dispersing plate 2412 to generate high-frequency vibration. By arranging the air separation material dispersing unit, the material reaching the air separation conveying and dispersing plate 2412 can improve the uniformity of the material layer distribution under the high-frequency resonance action of the vibrating rod during the material conveying operation, and the preliminary vibrating separation of the agglomerated material can also be realized.

[0054] Further, the air separation first-stage distribution assembly comprises an air separation first-stage air distribution plate 2421 and an air separation first-stage rectifier grid 2422 arranged in sequence along the conveying direction, the air separation first-stage air distribution plate 2421 is horizontally arranged, the air separation first-stage rectifier grid 2422 is arranged downwardly inclined along the conveying direction between the air separation first-stage air distribution plate 2421 and the air separation second-stage distribution assembly 243, and the air separation first-stage air distribution plate is a double-layer hole plate.

[0055] Further, the air separation first-stage air distribution plate 2421 comprises an air separation air cap 24211 and air separation upper and lower layers arranged in sequence along the height direction, the air separation air cap 24211 is fixedly arranged between the air separation upper and lower layers, a plurality of air separation air caps 24211 are arranged in an array, the air separation air cap 24211 comprises an air separation air inlet section, an air separation circular table section (diffusion section) and an air separation circular ring section (flow uniformization section) arranged coaxially, the air separation air inlet section is provided with an air inlet hole penetrating in the axial direction, the air separation circular table section is provided with an annular flow uniformization chamber arranged in a ring shape, the air separation circular ring section is provided with a circular ring air outlet chamber, the top surface of the air separation circular ring section is provided with an air outlet hole in communication with the circular ring air outlet chamber, a plurality of air outlet holes are arranged in sequence along the circumferential direction of the air separation circular ring section, and the air inlet hole, the annular flow uniformization chamber and the circular ring air outlet chamber are in communication with each other. More preferably, the air outlet hole is arranged inclined outwardly along the axial direction. In a specific embodiment of the present application, eight air outlet holes are arranged.

[0056] Further, the air separation upper and lower layers are arranged in sequence along the height direction and fixed by a layer fastening connector, the top of the air separation air cap 24211 is assembled on the air separation upper layer in an interference fit, and the bottom of the air separation air cap 24211 is assembled on the air separation lower layer in an interference fit. In actual work, the air separation air cap 24211 is embedded between the air separation upper and lower layers, the normal temperature air in the first-stage air supply chamber enters the air separation air cap 24211 from the air inlet hole, sequentially passes through the diffusion section and the flow uniformization section, and is then evenly divided into eight air flows to act on the material layer through the air outlet hole, the air separation air cap 24211 does not need to extend into the material layer, the form of the air separation air cap 24211 is more suitable for thin material layers than the existing air separation air cap 24211, can not only enhance the jet flow speed when acting on the material, prevent the occurrence of a jet flow blind area, but also can enhance the collision between the materials in the action area of the air separation first-stage air distribution plate 2421 by slightly inclining the angle of the air outlet hole, thereby further promoting the separation of the agglomerated materials, and the resistance of the double-layer multi-hole air distribution plate does not have a large difference compared with the traditional straight-hole air distribution plate.

[0057] Further, the air separation second-stage distribution assembly comprises an air separation second-stage air distribution plate 2431 and an air separation second-stage rectifier grid 2432 arranged in sequence along the conveying direction, and the air separation second-stage rectifier grid 2432 is arranged downwardly inclined along the conveying direction between the air separation second-stage air distribution plate 2431 and the air separation third-stage distribution assembly 244. More preferably, the air separation second-stage air distribution plate 2431 is horizontally arranged.

[0058] Furthermore, the three-stage air separation discharge assembly 244 includes a three-stage air distribution plate 2441 and an air separation discharge conveyor plate 2442 arranged sequentially along the conveying direction. The air separation discharge conveyor plate 2442 is located downstream of the three-stage air distribution plate 2441 and extends out of the air separation working chamber.

[0059] Furthermore, it also includes an air-separated material guiding and discharging mechanism 27, which includes an air-separated material guiding and discharging box 271 located at the output end of the air-separated multi-stage separation unit 24. The air-separated granular material is output from the tail end of the air-separated multi-stage separation unit 24 to the air-separated material guiding and discharging box 271 outside the air-separated working chamber. The air-separated material guiding and discharging box 271 has a downwardly arranged particle outlet, and an airlock discharge valve is arranged at the particle outlet. In a specific implementation, the air-separated material guiding and discharging box 271 is located on the air-separated hood 25 and covers the extended end of the air-separated discharge conveyor plate 2442.

[0060] Furthermore, the air classifier hood 25 includes an upper air classifier hood 251, a lower air classifier hood 252, and an air classifier baffle dispersing unit 253. The lower air classifier hood 252 is fixedly mounted on the air classifier vibrating conveyor table 22 and covers the air classifier multi-stage separation unit 24. The upper air classifier hood 251 is fixedly mounted on the air classifier foundation frame and presses over the lower air classifier hood 252. The upper air classifier hood 251 and the lower air classifier hood 252 are sealed together by a corrugated rubber sleeve. The upper hood 251 and the lower hood 252 of the air classifier, together with the multi-stage air classifier separation unit 24, form an air classifier working chamber. The air classifier baffle breaking unit 253 is disposed on the upper hood 251 and located within the air classifier working chamber. The air classifier baffle breaking unit 253 includes a first-stage air classifier baffle assembly 2531 disposed above the first-stage air classifier conveying assembly and a second-stage air classifier baffle assembly 2532 disposed above the second-stage air classifier conveying assembly 243. In the present invention, by setting the air classifier hood 25, which includes the upper hood 251 and the lower hood 252, the lower hood 252 vibrates with the air classifier vibrating conveyor table 22 to prevent leakage during feeding. The upper hood 251 is sealed on the lower hood 252 to ensure air classifier performance. At the same time, the air classifier baffle breaking unit 253 is arranged on the upper hood 251, which can both break up the rising material and does not vibrate itself.

[0061] Further, the wind selection first material blocking assembly 2531 comprises a first hoisting hanging rod 25311, a first hoisting frame 25312, and first wind blocking plates 25313 arranged on the first hoisting frame 25312 in a height direction, second wind blocking plates 25314 arranged between adjacent two first wind blocking plates 25313, the first and second wind blocking plates arranged on the side wall surfaces of the first hoisting frame, the first wind blocking plates 25313 and the second wind blocking plates 25314 arranged in a spaced manner, the first wind blocking plates 25313 comprising first window leaf support rails, first wind guiding window leaves, and first fixing blocks, the first hoisting frame 25312 being provided with the first window leaf support rails and the first fixing blocks on the two side wall surfaces respectively, the first window leaf support rails movably arranged on the side wall surfaces of the first hoisting frame 25312, the first fixing blocks fixedly arranged on the side wall surfaces of the first frame and below the first window leaf support rails, the upper side of the first wind guiding window leaf arranged between the two first window leaf support rails arranged in a relative manner and hingedly arranged, the lower side of the first wind guiding window leaf supported on the two first fixing blocks, the first wind guiding window leaf arranged on the corresponding first fixing block in a first inclined manner, the second wind blocking plates 25314 comprising second window leaf support rails, second wind guiding window leaves, and second fixing blocks, the second hoisting frame being provided with the second window leaf support rails and the second fixing blocks on the two side wall surfaces respectively, the second window leaf support rails movably arranged on the side wall surfaces of the second hoisting frame, the second fixing blocks fixedly arranged on the side wall surfaces of the second frame and below the second window leaf support rails, the upper side of the second wind guiding window leaf arranged between the two second window leaf support rails arranged in a relative manner and hingedly arranged, the lower side of the second wind guiding window leaf supported on the two second fixing blocks, the second wind guiding window leaf arranged on the corresponding second fixing block in a second inclined manner, the second inclined manner opposite to the first inclined manner, and a window adjusting member 25315 for driving the first window leaf support rails and / or the second window leaf support rails to slide and position.

[0062] In the scheme of the present application, the inclination angle of the first wind guiding window leaf can be changed when the first window leaf support rails are driven to slide by the window adjusting member 25315, and the inclination angle of the second wind guiding window leaf can be changed when the second window leaf support rails are driven to slide by the window adjusting member 25315.

[0063] Optionally, the window adjusting member 25315 adopts a hydraulic push rod. In a specific embodiment, the window adjusting member 25315 comprises a first hydraulic push rod, a second hydraulic push rod, and a movable connecting rod, the first hydraulic push rod is arranged above the uppermost first baffle 25313, the second hydraulic push rod is arranged below the lowermost first baffle 25313, the two ends of the movable connecting rod are movably connected to the movable ends of the first hydraulic push rod and the second hydraulic push rod respectively, the middle part of the movable connecting rod is movably connected to the first window leaf support rail and the second window leaf support rail, the fixed ends of the first hydraulic push rod and the second hydraulic push rod are respectively installed on the side wall surface of the first hoisting frame 25312, the extension and retraction of the first hydraulic push rod and / or the second hydraulic push rod drives the movable connecting rod to swing, and then drives the first window leaf support rail and the second window leaf support rail to slide, finally the inclination angle of the first and second air guide window leaves is adjusted.

[0064] In the scheme of the present application, the structure of the air separation secondary material blocking assembly 2532 is the same as that of the air separation primary material blocking assembly 2531.

[0065] In a preferred embodiment, the first hoisting hanging rod 25311 is a telescopic adjusting rod, by setting the first hoisting hanging rod 25311 as a telescopic adjusting rod, the height between the air separation primary material blocking assembly 2531 and the air separation primary air distribution plate 2421 can be adjusted; further, the height of the air separation secondary material blocking assembly 2532 relative to the air separation secondary air distribution plate 2431 is adjustably arranged. In use, the installation height of the air separation primary material blocking assembly 2531 and the installation height of the air separation secondary material blocking assembly 2532 can be adjusted according to the required separation effect.

[0066] It can be understood that in the specific implementation, the first material blocking assembly 251 is composed of the first lifting frame 25312, the first baffle 25313 (a layer of material blocking plate group), the second baffle 25314 (two layers of material blocking plate group), the first baffle 25312 (three layers of material blocking plate group), a fixed block and a window adjusting piece 25315. The first lifting frame 25312 is directly fixed to the upper cover body 251 of the air selection through the first lifting hanging rod 25311. The first, second and third material blocking plate groups are arranged in the first lifting frame 25312. The air selection first material blocking assembly 2531 does not participate in the vibration of the main system. The material blocking plate assembly includes three layers of material blocking plate groups, which are arranged in staggered manner from bottom to top. On the one hand, it is used to further provide impact force for the material subjected to the jet flow impact. The greater the particle size of the material acting on the material blocking plate group, the greater the impact force of the material, so as to promote the separation of the agglomerated material. On the other hand, when the inertia of the material under the action of the jet flow impact is greater than the resistance of the first layer of material blocking plate group, the material will pass through the first layer of material blocking plate group and move upward. The arrangement of the third layer of material blocking plate group can ensure that each particle size of the material can fall back to the upper part of the air selection first air distribution plate 2421 under the action of resistance, so as to prevent the material from being sucked away by the negative pressure of the dust removal port (air selection dust outlet 202).

[0067] Further, the air selection air supply mechanism 30 includes an air selection first air supply box 31, an air selection second air supply box 32, an air selection third air supply box 33, an air supply branch pipe 34, an air supply main pipe 35 and a blower 36. The air selection first air supply box 31, the air selection second air supply box 32 and the air selection third air supply box 33 are communicated with the air outlet end of the air supply branch pipe 34 and the air supply main pipe 35 through the corresponding air supply branch pipe 34. The air inlet end of the air supply main pipe 35 is communicated with the blower 36. The air selection first air supply box 31, the air selection second air supply box 32 and the air selection third air supply box 33 are flexibly connected with the air selection vibrating conveying table 22. The air selection first air supply box 31 is below the air selection first separation and conveying assembly 242 and has a first air supply chamber for blowing air to the air selection first separation and conveying assembly 242. The air selection second air supply box 32 is below the air selection second separation and conveying assembly 243 and has a second air supply chamber for blowing air to the air selection second separation and conveying assembly 243. The air selection third air supply box 33 is below the third separation and conveying assembly and has a third air supply chamber for blowing air to the third separation and conveying assembly.

[0068] Further, the bottom of the air selection first air supply box 31, the air selection second air supply box 32 and the air selection third air supply box 33 is arranged with a dust discharge valve. The air supply branch pipe 34 is arranged with a flow adjusting valve 37.

[0069] Further, the winnowing feeding mechanism 10 comprises a bin 11, a circular roller feeder 12, and an opening regulator 13. The bottom of the bin 11 is provided with a winnowing discharge outlet 203, and the opening regulator 13 is arranged upstream of the circular roller feeder 12 to adjust the amount of material entering the circular roller feeder 12.

[0070] The present application provides a specific sintering fuel sorting device as follows:

[0071] The winnowing feeding conveying plate 2411 and the winnowing conveying dispersing plate 2412 are non-porous blind plates, the back surface of the winnowing conveying dispersing plate 2412 is provided with a vibrating rod mounting hole, the winnowing first-stage air distribution plate 2421 is a double-layered porous air distribution plate, the winnowing second-stage air distribution plate 2431 and the winnowing third-stage air distribution plate 2441 are single-layered porous air distribution plates, the winnowing first-stage rectifying grid 2422 and the winnowing second-stage rectifying grid 2432 are non-porous blind plates, and are simultaneously provided with a plurality of material distribution grids arranged in a staggered manner. The winnowing feeding conveying plate 2411, the winnowing conveying dispersing plate 2412, the winnowing first-stage air distribution plate 2421, the winnowing first-stage rectifying grid 2422, the winnowing second-stage air distribution plate 2431, the winnowing second-stage rectifying grid 2432, the winnowing third-stage air distribution plate 2441, and the winnowing discharge conveying plate 2442 are welded to the winnowing vibrating conveying table 22 and are supported by support frames, the winnowing vibrating conveying table 22 is connected to the winnowing upper cover 251 and the lower air chamber (the first-stage air supply chamber, the second-stage air supply chamber, and the third-stage air supply chamber) by flexible connections, and the vibrating motor is connected to the winnowing vibrating conveying table 22 by bolts. During operation, only the middle part vibrates to reduce the vibration load of the system. The lower part of the winnowing conveying dispersing plate 2412 is welded to a vibrating rod mounting support (striking support), the upper part of the striking vibrating rod is fixed to the winnowing conveying dispersing plate 2412 by the striking support, and the lower part is connected to a cable. The striking support, the striking vibrating rod, and the winnowing conveying dispersing plate 2412 participate in the system vibration. The first hoisting frame 25312 is arranged at the corresponding position of the winnowing upper cover 251, and the winnowing first-stage material blocking assembly 2531 is not connected to the winnowing vibrating conveying table 22 and does not participate in the system vibration. The air chamber comprises the first-stage air supply chamber, the second-stage air supply chamber, and the third-stage air supply chamber, the upper parts are respectively connected to the winnowing first-stage air distribution plate 2421, the winnowing second-stage air distribution plate 2431, and the winnowing third-stage air distribution plate 2441, the lower parts are respectively connected to the first-stage air supply branch pipe 34, the second-stage air supply branch pipe 34, and the third-stage air supply branch pipe 34, and each air chamber is provided with a flow guide plate assembly to ensure the uniformity of the air speed distribution of the air distribution plate. At the same time, since the air speed requirements of each part of the sorting system are different, each air supply branch pipe 34 is provided with a flow adjusting valve 37 to adjust the air speed of each air distribution plate according to requirements. In addition, considering that the air distribution plate may appear to be reversed during operation, each air chamber is provided with a dust discharge port at the lower part to facilitate emptying of the air distribution hole to ensure the normal operation of the air supply system.

[0072] The specific use process of the sintered fuel sorting device provided by the present application is as follows:

[0073] When the material reaches the air separation first cloth air distribution plate 2421, the material is subjected to the double effects of high-frequency excitation of the vibration motor and high-speed jet impact (the outlet jet speed is about 30-35 m / s) of the micro-holes on the double-layer porous cloth air distribution plate, and the material layer is blown up and quickly fluidized. The impact of the high-speed jet will preliminarily separate the fine particles adhered to the large particles under the action of liquid bridge force and the small particles gathered together. At the same time, the air separation first cloth air distribution plate 2421 is provided with an air separation first material blocking assembly on the upper part. The material subjected to the high-pressure jet impact will successively impact three layers of material blocking plates, and then fall back to the air separation first cloth air distribution plate 2421 under the resistance of the material blocking plates, and then impact the material blocking plates again due to the action of the high-speed jet, repeating the process of impact, impact, and falling. In this process, due to the large fluidization speed of the material, the corresponding kinetic energy is large, and the material will be subjected to a strong impact when impacting the material blocking plate, which can separate the agglomerated material that fails to be successfully separated under the impact of the high-pressure jet. The impact is more obvious for the particles with larger particle size. At the same time, the three layers of material blocking plates are arranged in staggered inclination, and the particle size of the material blocked by the upper part is smaller, so as to prevent the material that has not been fully separated from being directly sucked away from the dust removal port. Due to the impact of the micro-hole jet of the air separation first cloth air distribution plate 2421, combined with the resistance of the air separation first material blocking assembly on the upper part, the movement of the material in this area will be in a relatively chaotic state, and the unevenness of the material layer distribution may be affected. Therefore, the air separation first cloth air distribution plate 2421 is provided with an air separation first flow regulation grid 2422, which can adjust the uniformity of the material distribution on the cloth air distribution plate, and can also change the mixing of the material on the air separation first cloth air distribution plate 2421 to a certain extent to make the material range subjected to the jet impact wider.

[0074] When reaching the secondary air distribution plate 2431, the material will also be in a fluidized state under the high-frequency vibration and the micro-porous jet flow. However, the regularity of the movement will be obviously enhanced, and the material will basically present a form of a boiling fluidized bed, because the speed of the micro-porous jet flow is reduced (the outlet jet flow speed is about 15-20 m / s). When the material is initially fluidized, the material will be thrown up by the micro-porous jet flow, and then the large particles will fall down, while the small particles will be carried out of the material layer by the air flow. With the stabilization of the fluidized state, a clear layering will appear. The upper part of the secondary air distribution plate 2431 is also provided with a secondary baffle plate assembly, which can separate the agglomerated material that fails to be separated in the area of the primary air distribution plate 2421, and prevent the +0.5 mm particle size material from being sucked away by the negative pressure of the dust removal port. However, because the distance between the secondary air distribution plate 2431 and the secondary baffle plate assembly is large, and the speed of the jet flow is reduced, the amount of material blocked by the secondary baffle plate assembly is also reduced, and therefore the setting density of the baffle plate is also reduced. The secondary air distribution plate 2431 is provided with a secondary air distribution grid 2432 behind it, which is mainly used to enhance the uniformity of the material layer distribution.

[0075] When reaching the tertiary air distribution plate 2441, the speed of the micro-porous jet flow will be further reduced (the outlet jet flow speed is about 8-12 m / s), and the movement state of the material will also present a state that the coarse particle material is concentrated in the lower part of the bed layer, and the fine particle material is suspended in the upper part of the bed layer. With the upward movement of the material, the jet flow gradually weakens, and the smaller the particle size of the material falling down is, the higher it is. The distance between the tertiary distribution plate and the dust removal port is sufficient to meet the falling of the +0.5 mm particle size particles, and the dust removal port adopts a micro-negative pressure, so that the -0.5 mm particle size material can be transported to the dust removal system for recovery. The coarse particle material falling on the tertiary air distribution plate 2441 will continue to move forward under the action of the vibration motor, and then be recovered from the coarse particle discharge port (the air separation discharge outlet 203) after passing through the air separation discharge conveying plate 2442.

[0076] The beneficial effects of the present application mainly include: the sinter wet light fine fuel sorting device can reduce the proportion of -0.5 mm (less than 0.5 mm) particle size fuel in the sinter fuel according to the process requirements, improve the utilization efficiency of the fuel and the sinter production index, and reduce the solid energy consumption of the sinter production work flow; the sinter wet light fine fuel sorting device realizes the sorting of the wet light fine fuel through the sorting principle of agglomerated material strong breaking, fluidized layering and accurate grading, and has the advantages of good separation effect, high sorting efficiency and low system energy consumption compared with the traditional sorting device.

[0077] Please refer to Figure 4 and Figure 5Further, in step S22, the first sinter wet fuel screening system is used for air separation, the first sinter wet fuel screening system comprises a first sinter wet fuel screening device and a heater, and the heater is used for providing hot air for the first sinter wet fuel screening device.

[0078] Further, in step S23, the second sinter wet fuel screening system is used for air separation, the second sinter wet fuel screening system comprises a second sinter wet fuel screening device 300 and a heater 400, and the heater 400 is used for providing hot air for the second sinter wet fuel screening device 300.

[0079] Further, the first sinter wet fuel screening device 200 comprises a first screening bulk material distribution unit 210, a first primary screening unit 220, a first secondary screening unit 230, a first tertiary screening unit 240 and a first air cover 250 which are sequentially distributed along the conveying direction, the first screening bulk material distribution unit 210 has a first inclined downward conveying plate, the back surface of the first inclined downward conveying plate is arranged with a first vibrator, the bottom of the first primary screening unit 220 is provided with a first primary hot air chamber, the top of the first primary screening unit 220 is arranged with a first air separation primary material blocking assembly, the bottom of the first secondary screening unit 230 is provided with a first secondary normal temperature chamber, the top of the first secondary screening unit 230 is arranged with a first secondary material blocking plate assembly, the bottom of the first secondary screening unit 230 is provided with a first tertiary normal temperature chamber, and the top of the first tertiary screening unit 240 is arranged with a powder selection blade assembly 260 on the first air cover 250.

[0080] Please refer to Figure 6 Further, the second sinter wet fuel screening device 300 comprises a second screening bulk material distribution unit 210, a second primary screening unit 220, a second secondary screening unit 330, a second tertiary screening unit 340 and a second air cover 350 which are sequentially distributed along the conveying direction, the second screening bulk material distribution unit 210 has a second inclined downward conveying plate, the back surface of the second inclined downward conveying plate is arranged with a second vibrator, the bottom of the second primary screening unit 220 is provided with a second primary hot air chamber, the top of the second primary screening unit 220 is arranged with a second air separation primary material blocking assembly, the bottom of the second secondary screening unit 330 is provided with a second secondary normal temperature chamber, the top of the second secondary screening unit 330 is arranged with a second secondary material blocking plate assembly, the bottom of the second secondary screening unit 330 is provided with a second tertiary normal temperature chamber, and the top of the second tertiary screening unit 340 is arranged with a grading impeller assembly 360 on the second air cover 350.

[0081] The sintering wet fuel sorting method mainly focuses on the wet fine particle material with moisture content in the range of 7-20% and particle size distribution of 0-5mm. The classification of the material focuses on solving the two key problems of rapid separation of agglomerated material and accurate control of classification limit in turn. In order to solve the two key problems, the application proposes a rapid separation method of agglomerated material based on the principle of high-speed jet impact and baffle impact, and an accurate control method of classification limit based on the principles of fluidized drying, fluidized layering, planar spiral airflow and gravity classification. A material movement strengthening method based on high-frequency excitation principle is also proposed. The material will be subjected to various actions in turn during the classification process and achieve the purposes of material drying, agglomerated material dispersion and accurate classification. However, with different classification limits, the means to solve the two key problems of wet fine coal classification are not the same, which is mainly determined by the smallest particle size that can be separated by the classification method based on different principles under this material condition. According to the experimental and research results, the method of fully fluidizing and layering the material on the perforated plate to realize classification is more suitable for the working condition with classification limit above 0.5mm. For the working condition with classification limit below 0.5mm, the methods based on planar spiral airflow or gravity classification require the moisture content of the material to be below 5%, so the material needs to be dried before classification. The difference of classification methods corresponding to different classification limit working conditions means that the actions on the material during the classification process are also different, and the corresponding classification medium also exists difference.

[0082] In specific implementation, thin material layer is adopted, and the thickness of the material layer is not more than 50mm. Thin material layer can make the contact between the material and each action structure more comprehensive. In addition, a high-frequency resonance system is introduced during the material distribution process to disperse the agglomerated material formed due to extrusion and other external forces in the stock bin.

[0083] For the working condition of the classified particle size <0.5mm particle size, in the classification process, in the first stage of the first screening unit, the material is first fluidized and dried under the action of the low-speed jet of the multi-hole cloth air distribution plate micro-hole (the outlet jet velocity is about 8~12m / s), and the drying medium is hot air, which reduces the moisture of the wet material to about 5%. After the moisture is reduced, in the first stage of the second screening unit, there may be agglomerated particles in the material, which need to be introduced into the micro-hole medium-speed jet (the outlet jet velocity is about 15~20m / s) and the baffle impact coupling to disperse the agglomerated material, and the separation medium is normal temperature air. After the agglomerated material is separated, the material can be classified, and the classification process mainly includes two stages of primary classification and secondary classification. The first stage adopts the method of fluidized stratification, and in the first stage of the third screening unit, the material is fluidized under the action of the low-speed jet of the micro-hole (the outlet jet velocity is about 8~12m / s), and the particles of >1~1.5mm (any value in the target particle size requirement of 1 to 1.5mm) are concentrated in the lower part of the bed, and the particles of <1~1.5mm (any value in the target particle size requirement of 1 to 1.5mm) are concentrated in the upper part of the bed and enter the secondary classification system under negative pressure, so as to complete the primary classification of the material, and the separation medium is normal temperature air. The basic principle of secondary classification will also be different with the difference of classification limit. When the classified particle size is <0.15mm, the secondary classification mainly adopts the classification method based on the action of plane spiral airflow, and when 0.15mm<classified particle size<0.5mm ((any value in the target particle size requirement of 1 to 1.5mm)), the method based on gravity classification is adopted. After the secondary classification is completed, the air separation method is adopted to separate the air separation medium and fine particles, and the whole separation process is completed. The material will also be subjected to high-frequency excitation throughout the process, which not only ensures the forward feeding, but also promotes the fluidization, drying and classification of the material.

[0084] For the wet material with the classification granularity of 0.5 mm, the accurate control of the separation limit mainly adopts the principle of the density stratification after the full fluidization of the material, and the classification granularity is controlled to be above 0.5 mm through the control of the pressure after the stratification, so that only one classification is needed in the whole process, and the separation medium is normal temperature air. However, since the material is not dried, stronger measures need to be taken for the separation of the agglomerated material. Here, the method of coupling of the micro-porous high-speed jet (the outlet jet velocity is about 30-35 m / s) and the baffle impact is adopted to disperse the small particles adhered to the large particles, and the material is subjected to the action of the micro-porous jet and the baffle impact, but the outlet jet velocity is reduced to 15-20 m / s, which is mainly to enable the large particle material to be concentrated in the lower part of the bed layer, and the fine particle material agglomerated together can fully contact the baffle to realize the separation of the small particles agglomerated together in the repeated collision with the baffle. After the separation is completed, the material enters the stage of fluidized classification, the micro-porous jet velocity is further reduced to 8-12 m / s, the material presents the fluidized stratification state of the large particles in the lower part and the small particles in the upper part, the small particles in the upper part are taken away by the negative pressure.

[0085] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sintering wet fuel sorting method, characterized by, The method comprises the steps of: S10, obtaining original wet fuel, the moisture content of the original wet fuel is 7% to 20%, and the particle size of the original wet fuel is not greater than 5 mm; S20, if the classification particle size requirement is not less than 0.5 mm, the step S21 is entered; if the classification particle size requirement is not greater than 0.15 mm, the step S22 is entered; if the classification particle size requirement is 0.15 to 0.5 mm, the step S23 is entered; The step S21 specifically comprises: S211, primary dispersion and uniform distribution of materials in the vibration conveying process; S212, fluidization and loosening based on normal temperature wind in the vibration conveying process; S213, agglomerated material is broken based on normal temperature wind in the vibration conveying process; S214, fluidization classification based on normal temperature wind in the vibration conveying process; coarse material one is obtained by separation of not less than 0.5 mm, and fine material one is obtained by gas-solid separation of less than 0.5 mm; The step S22 specifically comprises: S221, primary dispersion and uniform distribution of materials in the vibration conveying process; S222, fluidization and drying based on hot wind in the vibration conveying process; S223, fluidization dispersion based on normal temperature wind in the vibration conveying process; S224, fluidization classification based on normal temperature wind in the vibration conveying process; S225, secondary classification by using a planar spiral airflow method, coarse material two is obtained by separation of not less than 0.15 mm, and fine material two is obtained by gas-solid separation of less than 0.15 mm; The step S23 specifically comprises: S231, primary dispersion and uniform distribution of materials in the vibration conveying process; S232, fluidization and drying based on hot wind in the vibration conveying process; S233, fluidization dispersion based on normal temperature wind in the vibration conveying process; S234, fluidization classification based on normal temperature wind in the vibration conveying process; S334, secondary classification by using a gravity classification method, coarse material three is obtained by separation of 0.15 to 0.5 mm, and fine material three is obtained by gas-solid separation of less than 0.15 mm.

2. The sintering wet fuel sorting method according to claim 1, wherein the vibration frequency of the vibration conveying is 800 to 1000 times per minute; the beating frequency of the primary dispersion is 8000 to 10000 times per minute; the material thickness of the uniform distribution is 30 to 50 mm; the wind temperature of the normal temperature wind is 20 to 30 degrees; and the wind temperature of the hot wind is 60 to 80 degrees.

3. The sintering wet fuel sorting method according to any one of claims 1 or 2, wherein in the step S21, air separation is performed by using a sintering wet fuel sorting system, and the sintering wet fuel sorting system comprises a sintering fuel sorting device, ​ ​ The sintering fuel sorting device comprises a wind feeding mechanism, a wind material sorting mechanism and a wind feeding mechanism, the wind material sorting mechanism has a wind material inlet, a wind dust outlet and a wind discharge outlet, the wind feeding mechanism is arranged at the input side of the wind material sorting mechanism, the wind feeding mechanism is arranged between the wind material inlet and the wind discharge outlet, the wind feeding mechanism is used to feed the wind material inlet, The wind material sorting mechanism comprises a wind base frame, a wind vibration conveying table, a wind vibration driving mechanism, a wind multi-stage sorting unit, a wind cover and a wind material dispersing unit, the wind vibration conveying table is arranged on the wind base frame, the wind vibration driving mechanism is used to drive the wind vibration conveying table to vibrate, the wind multi-stage sorting unit is fixedly arranged on the wind vibration conveying table for conveying materials with the wind vibration conveying table, the wind cover is arranged on the wind base frame and forms a wind working chamber with the wind multi-stage sorting unit, the wind material inlet and the wind dust outlet are arranged upstream and downstream of the wind cover respectively, the wind feeding mechanism is arranged below the wind multi-stage sorting unit, the wind feeding mechanism is used to feed air into the wind working chamber from below the wind multi-stage sorting unit, the wind material dispersing unit is used to drive the head of the wind multi-stage sorting unit to vibrate, so that the water-containing agglomerated material at the head is dispersed by vibration, the dispersed material is vibrated and conveyed on the surface of the wind multi-stage sorting unit and is winded in the wind working chamber, the dust material after wind is output through the wind dust outlet, and the particle material after wind is output to the outside of the wind working chamber through the tail of the wind multi-stage sorting unit.

4. The sintering wet fuel sorting method according to claim 3, wherein The wind multi-stage sorting unit comprises a wind material dispersing conveying assembly, a wind first-stage sorting conveying assembly, a wind second-stage sorting conveying assembly and a wind third-stage sorting conveying assembly arranged in sequence along the conveying direction, the wind material dispersing conveying assembly, the wind first-stage sorting conveying assembly, the wind second-stage sorting conveying assembly and the wind third-stage sorting conveying assembly are fixedly arranged on the wind vibration conveying table, the wind material inlet is above the wind material dispersing conveying assembly and is at the input side of the wind material dispersing conveying assembly, The wind material dispersing unit comprises a wind material conveying plate and a wind conveying dispersing plate arranged in sequence along the conveying direction, the wind material inlet is above the wind material conveying plate, the wind conveying dispersing plate is arranged between the wind material conveying plate and the wind second-stage sorting conveying assembly and is inclined downward along the conveying direction, and the wind material dispersing unit is used to drive the wind conveying dispersing plate to vibrate from the back of the wind conveying dispersing plate.

5. The sintering wet fuel sorting method according to claim 4, wherein The air separation first-stage sorting material feeding assembly comprises an air separation first-stage air distribution plate, the air separation first-stage air distribution plate comprises air separation air caps and an air separation upper layer plate and an air separation lower layer plate arranged at intervals in the height direction, the air separation air caps are fixedly arranged between the air separation upper layer plate and the air separation lower layer plate, and a plurality of the air separation air caps are arranged in an array, The air separation air cap comprises an air separation air inlet section, an air separation circular table section and an air separation circular ring section arranged coaxially, the air separation air inlet section is provided with an air inlet hole penetrating in the axial direction, the air separation circular table section is provided with an annular flow uniformizing chamber arranged in a ring shape, the air separation circular ring section is provided with a circular ring air outlet chamber, the top surface of the air separation circular ring section is provided with an air outlet hole in communication with the circular ring air outlet chamber, and a plurality of the air outlet holes are arranged at intervals in the circumferential direction of the air separation circular ring section, The air inlet hole, the annular flow uniformizing chamber and the circular ring air outlet chamber are in communication with each other.

6. The sintered wet fuel sorting method according to claim 4, characterized in that, The air separation second-stage sorting material feeding assembly comprises an air separation second-stage air distribution plate and an air separation second-stage rectifying grid arranged in sequence in the conveying direction, the air separation second-stage rectifying grid is arranged in a downwardly inclined manner in the conveying direction between the air separation second-stage air distribution plate and the air separation third-stage sorting material discharging assembly, The air separation third-stage sorting material discharging assembly comprises an air separation third-stage air distribution plate and an air separation material discharging conveying plate arranged in sequence in the conveying direction, the air separation material discharging conveying plate is downstream of the air separation third-stage air distribution plate and extends out of the air separation working chamber.

7. The sintered wet fuel sorting method according to claim 3, characterized in that, In step S22, air separation is performed by using a first sintered wet fuel screening system, the first sintered wet fuel screening system comprises a first sintered wet fuel screening device and a heater, and the heater is used to provide hot air for the first sintered wet fuel screening device.

8. The sintered wet fuel sorting method according to claim 7, characterized in that, In step S23, air separation is performed by using a second sintered wet fuel screening system, the second sintered wet fuel screening system comprises a second sintered wet fuel screening device and the heater, and the heater is used to provide hot air for the second sintered wet fuel screening device.

9. The sintered wet fuel sorting method according to claim 8, characterized in that, The first sintered wet fuel screening device comprises a first screening bulk material distribution unit, a first first-stage screening unit, a first second-stage screening unit, a first third-stage screening unit and a first air hood arranged in sequence in the conveying direction, The first screening bulk material distribution unit is provided with a first inclined downward conveying plate, and the back surface of the first inclined downward conveying plate is provided with a first vibrator, The bottom of the first first-stage screening unit is provided with a first first-stage hot air chamber, and the top of the first first-stage screening unit is provided with a first air separation first-stage material blocking assembly, The bottom of the first second-stage screening unit is provided with a first second-stage normal temperature chamber, and the top of the first second-stage screening unit is provided with a first second-stage material blocking plate assembly, The bottom of the first second-stage screening unit is provided with a first third-stage normal temperature chamber, and the top of the first third-stage screening unit is provided with a powder selection vane assembly.

10. The sintered wet fuel sorting method according to claim 9, characterized in that, the second sintered wet fuel screening device comprises a second screening bulk material distributing unit, a second primary screening unit, a second secondary screening unit, a second tertiary screening unit and a second air hood arranged in sequence along the conveying direction, the second screening bulk material distributing unit is provided with a second inclined downward conveying plate, and a second vibrator is arranged on the back surface of the second inclined downward conveying plate, the bottom of the second primary screening unit is provided with a second primary hot air chamber, and the top of the second primary screening unit is arranged with a second air separation primary material blocking assembly, the bottom of the second secondary screening unit is provided with a second secondary normal temperature chamber, and the top of the second secondary screening unit is arranged with a second secondary material blocking plate assembly, the bottom of the second secondary screening unit is provided with a second tertiary normal temperature chamber, and the top of the second tertiary screening unit is arranged with a grading impeller assembly on the second air hood.

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