Sintering moist light and fine fuel sorting system

Abstract

The invention discloses a sintered wet light and fine fuel sorting system which comprises a feeding mechanism used for outputting fuel outwards; a pre-screening mechanism; a crushing mechanism; a bearing assembly is arranged in the sorting box, and the bearing assembly is connected with a vibration motor; air distribution holes are formed in the bearing assembly, an air inlet is formed in the position, below the bearing assembly, of the sorting box, and an air outlet is formed in the position, above the bearing assembly, of the sorting box. The sorting box is provided with a discharging opening in one side of the bearing assembly. The air supply mechanism is used for conveying airflow to the sorting box from the air inlet; and the dust remover is communicated with the air outlet. Through cooperative work of the pre-screening mechanism and the sorting box, most of the particle sizes of the fuel can be controlled within the range of 0.5-3 mm, the proportion of the particle size fraction of-0.5 mm is reduced, and therefore the combustion efficiency of the fuel is improved. And through the design of the vibration motor and the air distribution holes, the screening holes are effectively prevented from being blocked, the screening efficiency is improved, and the problem that an existing screening device is prone to being blocked under the high-water-content fuel condition is solved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical sintering, in particular to a sintering wet light fine fuel sorting system. Background Art

[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 iron and steel metallurgical industry. Solid fuel particles that are too coarse or too fine will have a significant impact on the fuel utilization efficiency and the performance parameters of the sintered ore. Therefore, during the sintering process, it is generally required to control the fuel particle size within the range of 0.5 to 3 mm. However, the existing one-stage or two-stage fuel crushing process lacks a fine particle sorting device, making it difficult to accurately control the lower limit of the fuel, resulting in the -0.5mm particle size (particle size less than 0.5mm) accounting for more than 30% of the solid fuel sent to the sintering batching room after four-roller crushing. At the same time, affected by the sintering production process requirements and fuel performance, the existing sorting devices on the market are difficult to meet the requirements of ±0.5mm particle size sintering fuel sorting. The main reason is that, on the one hand, sintered solid fuel has the characteristics of high water content (generally 7-10%, and up to 13% or even 15% in special cases), small particle size difference (full particle size distribution within the range of 0-5mm), and large output. As a result, the existing screening devices are very easy to clog the sieve holes during operation, and the screening efficiency is less than 50%. On the other hand, the sintering production process has high requirements on fuel performance parameters including moisture. The use of wet screening or drying followed by screening is not only energy-intensive but also difficult for the finished product to meet the requirements. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a sintering wet light fine fuel sorting system.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A sintering wet light fine fuel sorting system comprises: a feeding mechanism for outputting fuel externally; a pre-screening mechanism for receiving the fuel outputted by the feeding mechanism and screening the fuel, screening the fuel into finished fuel and large particle fuel and outputting them externally separately; a crushing mechanism for receiving the large particle fuel outputted by the pre-screening mechanism and crushing the large particle fuel; a sorting box, wherein a bearing assembly is provided in the sorting box, and the bearing assembly is connected to a vibration motor; air distribution holes are provided on the bearing assembly, and the sorting box is provided with an air inlet below the bearing assembly and an air outlet above the bearing assembly; the sorting box is provided with a discharge port on one side of the bearing assembly; an air supply mechanism for conveying airflow from the air inlet to the sorting box; a dust collector connected to the air outlet, for receiving airflow carrying fine particle fuel and intercepting the fine particle fuel and outputting it externally; a finished fuel conveying mechanism for receiving the fuel outputted from the discharge port and the finished fuel outputted by the pre-screening mechanism; and a fine particle fuel conveying mechanism for receiving the fine particle fuel outputted by the dust collector.

[0006] Furthermore, an ash discharge pipe is provided at the bottom of the separation box, an ash discharge pipe is provided with an ash discharge valve, and an outlet of the ash discharge pipe is located above the fine particle fuel conveying mechanism, so as to output the material to the fine particle fuel conveying mechanism.

[0007] Furthermore, a feeding mechanism is provided at the upper end of the sorting box away from the discharge port, and the feeding mechanism includes a feeding hopper, a round roller distributor and a lower hopper. The round roller distributor is located at the lower end outlet of the feeding hopper to rotate the material into the lower hopper. The lower end of the lower hopper is connected to the sorting box.

[0008] Furthermore, a distribution plate is provided below the lower hopper in the sorting box, and the distribution plate is used to receive the fuel falling from the lower hopper. The distribution plate is higher than the supporting assembly, and the distribution plate and the supporting assembly are connected by an inclined sliding plate; a vibrating rod is passed through the sliding plate, and a portion of the vibrating rod protrudes from the side of the sliding plate that contacts the fuel, and the vibrating rods are arranged at intervals perpendicular to the direction of fuel flow.

[0009] Furthermore, the bearing assembly includes a plurality of air distribution plates arranged at intervals, and the air distribution holes are provided on the air distribution plates; the heights of the plurality of air distribution plates gradually decrease along the flow direction of the fuel, and a distribution plate is passed between adjacent air distribution plates, and a distribution grid is provided on the distribution plate.

[0010] Furthermore, the sorting box includes a bottom box and a cover, wherein the cover is disposed above the bottom box; and the bearing assembly is connected to the bottom box.

[0011] Furthermore, a material blocking assembly is connected to the bottom of the cover, and the material blocking assembly is located above the air distribution plate.

[0012] Furthermore, the material baffle assembly includes a mounting side plate and a baffle, the mounting side plate is connected and fixed to the cover; the end of the baffle is connected to the mounting side plate, and the baffle is inclined relative to the horizontal plane.

[0013] Furthermore, the baffles are provided in a plurality of groups, and the baffles in the same group are arranged in an interval arrangement along the horizontal direction, and the baffles in adjacent groups have opposite inclination directions.

[0014] Furthermore, a telescopic driving mechanism is installed on the mounting side panel, one end of the telescopic driving mechanism is hinged to the mounting side panel, and the other end is hinged to a linkage bar. A hinged plate is provided at the end of the baffle, and the hinged plate is hinged to the mounting side panel. The hinged plates on the baffles of the same group are connected in series through a series rod, and the series rod is hinged to the hinged plate. The hinge positions of the series rod and the hinged plate are staggered with the hinge positions of the hinged plate and the mounting side panel. The linkage bar is hinged to the series rods corresponding to the baffles of all groups.

[0015] The present invention has the following beneficial effects:

[0016] Through the coordinated work of the pre-screening mechanism and the sorting box, the system can control the fuel particle size within the range of 0.5 to 3 mm, reducing the proportion of -0.5 mm particle size, thereby improving the fuel combustion efficiency. The design of the vibration motor and air distribution holes effectively prevents the blockage of the screen holes, improves the screening efficiency, and solves the problem that the existing screening device is easy to be blocked under the condition of high water content fuel; the sintering wet light fine fuel sorting system avoids the high energy consumption operation of wet screening or drying and then screening, and reduces energy consumption by directly sorting the wet fuel, while ensuring that the performance of the finished fuel meets the requirements of sintering production; the design of the finished fuel conveying mechanism and the fine particle fuel conveying mechanism enables the finished fuel and the fine particle fuel to be quickly and independently output, improving the production efficiency of the entire sintering fuel sorting process; the use of the dust collector not only improves the recovery rate of fine particle fuel, but also reduces dust emissions, which is beneficial to environmental protection.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a partial structural schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the relevant structure of the sorting box;

[0022] Figure 4 It is a schematic diagram of the connection structure between the material blocking assembly and the cover;

[0023] Figure 5 It is a structural schematic diagram of the material blocking assembly;

[0024] Figure 6 yes Figure 5 A magnified view of point A;

[0025] Figure 7 The curve of solid energy consumption of sintered ore according to the proportion of fuel with a diameter less than 0.5 mm is an embodiment;

[0026] Figure 8 The present invention is a curve showing the change in the amount of fuel required to be supplemented for sintered ore as the proportion of fuel <0.5 mm after air separation in an embodiment.

[0027] Legend:

[0028] Feeding mechanism 100, feeding belt 110, transition bin 120;

[0029] Pre-screening mechanism 200;

[0030] Crushing mechanism 300;

[0031] The sorting box 400, the bottom box 401, the cover 402, the bearing assembly 410, the vibration motor 411, the material separation grid 412, the air distribution plate 413, the material separation plate 414, the air inlet 420, the air outlet 421, the discharge port 430, the ash discharge pipe 440, the ash discharge valve 441, the material distribution plate 450, the material sliding plate 460, and the vibrating rod 461;

[0032] Feeding mechanism 470, feeding hopper 471, round roller distributor 472, lower hopper 473;

[0033] Air supply mechanism 500;

[0034] Dust collector 600, exhaust duct 610, dust removal fan 620;

[0035] Finished fuel delivery mechanism 700;

[0036] Fine particle fuel delivery mechanism 800;

[0037] The material blocking assembly 900 , the mounting side plate 910 , the blocking plate 920 , the hinge plate 921 , the telescopic driving mechanism 930 , the linkage bar 931 , and the serial rod 940 . DETAILED DESCRIPTION

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Please refer to Figure 1 and Figure 2 A sintering wet light fine fuel sorting system in a preferred embodiment of the present invention includes a feeding mechanism 100, a pre-screening mechanism 200, a crushing mechanism 300, a sorting box 400, an air supply mechanism 500, a dust collector 600, a finished fuel conveying mechanism 700 and a fine particle fuel conveying mechanism 800.

[0043] The feeding mechanism 100 is used to output fuel to the outside. The feeding mechanism 100 includes a feeding belt 110 and a transition bin 120. The feeding belt 110 conveys the fuel to the transition bin 120. The bottom of the transition bin 120 is connected with a feeding mechanism to output fuel to the pre-screening mechanism 200.

[0044] The pre-screening mechanism 200 is used to receive the fuel output by the feeding mechanism 100 and screen the fuel. The pre-screening mechanism 200 screens the fuel into finished fuel and large particle fuel and outputs them separately. Finished fuel with a particle size smaller than 3 mm directly enters the finished fuel conveying mechanism 700. The proportion of fuel with a particle size smaller than 0.5 in the finished fuel is small and does not affect the fuel quality. The pre-screening mechanism 200 can be a screen cylinder. Smaller finished fuel is screened out and conveyed to the finished fuel conveying mechanism 700, and larger particle fuel is sorted out and sent to the crushing mechanism 300.

[0045] The crushing mechanism 300 is used to receive the large particle fuel output by the pre-screening mechanism 200 and crush the large particle fuel. At this time, there will be a lot of fuel with a particle size less than 0.5 after crushing, which needs to be screened out to avoid affecting the fuel quality. The crushing mechanism 300 can be a four-roll crusher.

[0046] A carrying component 410 is provided in the sorting box 400, and the carrying component 410 is connected to a vibration motor 411; air distribution holes are provided on the carrying component 410, and the sorting box 400 is provided with an air inlet 420 below the carrying component 410, and an air outlet 421 is provided above the carrying component 410; the sorting box 400 is provided with a discharge port 430 on one side of the carrying component 410, and the material is carried on the carrying component 410, and through the vibration of the vibrator, the fuel gradually flows toward the discharge port 430, the air inlet 420 enters the air flow and blows the fuel on the carrying component 410 through the air distribution holes, thereby blowing up fine particles of fuel and discharging them from the air outlet 421 with the air flow, thereby realizing the sorting of fine particles of fuel.

[0047] The air supply mechanism 500 is used to deliver airflow from the air inlet 420 toward the sorting box 400; the air supply mechanism 500 may be a blower to provide airflow.

[0048] The dust collector 600 is connected to the air outlet 421, and is used to receive the airflow carrying the fine particle fuel and intercept the fine particle fuel and output it outward; the dust collector 600 can be a bag dust collector, and a fine particle fuel discharge port is provided at the bottom of the bag dust collector to output the fine particle fuel to the fine particle fuel delivery mechanism 800. The top of the bag dust collector is connected to the dust removal fan 620 through the exhaust pipe 610.

[0049] The finished fuel conveying mechanism 700 is used to receive the fuel outputted from the discharge port 430 and the finished fuel outputted from the pre-screening mechanism 200. The finished fuel conveying mechanism 700 may be a conveyor belt.

[0050] The fine particle fuel conveying mechanism 800 is used to receive the fine particle fuel outputted by the dust collector 600. The fine particle fuel conveying mechanism 800 may be a conveyor belt.

[0051] The present invention provides a sintering wet light fine fuel sorting system. Through the coordinated work of the pre-screening mechanism 200 and the sorting box 400, the system can control the fuel particle size within the range of 0.5 to 3 mm, reducing the proportion of -0.5 mm particle size, thereby improving the fuel combustion efficiency. The design of the vibration motor 411 and the air distribution hole effectively prevents the sieve hole from being blocked, improves the screening efficiency, and solves the problem that the existing screening device is easy to be blocked under the condition of high water content fuel; the sintering wet light fine fuel sorting system avoids the high energy consumption operation of wet screening or screening after drying, and reduces energy consumption by directly sorting the wet fuel, while ensuring that the performance of the finished fuel meets the requirements of sintering production; the design of the finished fuel conveying mechanism 700 and the fine particle fuel conveying mechanism 800 enables the finished fuel and the fine particle fuel to be quickly and independently output, thereby improving the production efficiency of the entire sintering fuel sorting process; the use of the dust collector 600 not only improves the recovery rate of the fine particle fuel, but also reduces dust emissions, which is beneficial to environmental protection.

[0052] Reference Figure 2 In some embodiments of the present invention, an ash discharge pipe 440 is provided at the bottom of the sorting box 400, and an ash discharge valve 441 is provided on the ash discharge pipe 440. The outlet of the ash discharge pipe 440 is located above the fine particle fuel conveying mechanism 800, so that the material is output to the fine particle fuel conveying mechanism 800. A number of fine particles will accumulate at the bottom of the sorting box 400, and the ash discharge valve 441 needs to be opened at intervals to discharge them. The accumulated fine particle fuel is sent to the fine particle fuel conveying mechanism 800 for utilization, thereby improving fuel utilization. Specifically, there are multiple air chambers at the bottom of the sorting box 400, and the bottoms of the multiple air chambers are all provided with ash discharge pipes 440. In addition, the air chambers are also provided with air inlets 420, so as to realize multi-position air intake, so that the airflow acts more evenly on the bearing component 410.

[0053] Reference Figure 3 In some embodiments of the present invention, a feeding mechanism 470 is provided at the upper end of the side of the sorting box 400 away from the discharge port 430. The feeding mechanism 470 includes a feeding hopper 471, a round roller distributor 472 and a lower hopper 473. A conveyor belt is usually provided above the feeding hopper 471 to receive the fuel crushed by the crushing mechanism 300 and deliver the fuel to the feeding hopper 471. The round roller distributor 472 is located at the lower end exit of the feeding hopper 471 to rotate the material into the lower hopper 473. The round roller distributor 472 includes a round roller and a motor driving the round roller to rotate. There is a gap between the round roller and the edge of one side of the lower end opening of the feeding hopper 471, and the material is driven to flow out of the gap to the lower hopper 473 through the rotation of the round roller. The lower end of the lower hopper 473 is connected with the sorting box 400. Specifically, a feeding port is provided at the upper end of the side of the sorting box 400 away from the discharge port 430 to communicate with the lower hopper 473. Specifically, as Figure 3As shown, the discharge port 430 is arranged on the right side of the sorting box 400, and the feeding mechanism 470 is located at the upper end of the left side of the sorting box 400, and the material flows from the left side to the right side.

[0054] Reference Figure 3 In some embodiments of the present invention, a distribution plate 450 is provided below the lower hopper 473 in the sorting box 400. The distribution plate 450 is used to receive the fuel dropped from the lower hopper 473. The distribution plate 450 is higher than the bearing assembly 410. The distribution plate 450 and the bearing assembly 410 are connected by an inclined material sliding plate 460. A vibrating rod 461 is passed through the material sliding plate 460. The vibrating rod 461 partially protrudes from the side of the material sliding plate 460 that contacts the fuel. The vibrating rods 461 are arranged at intervals perpendicular to the flow direction of the fuel. The vibrating rods 461 are connected to a high-frequency vibrator, so as to provide vibration to the distribution plate 450 and the material sliding plate 460, and at the same time, the material is evenly dispersed by the arranged vibrating rods 461 through the vibrating vibrating rods 461, thereby reducing fuel agglomeration.

[0055] Reference Figure 3 In a further embodiment of the present invention, the bearing assembly 410 includes a plurality of air distribution plates 413 arranged at intervals, and the air distribution plates 413 are arranged at intervals along the material flow direction, that is, arranged at intervals along the left and right directions. It can be understood that the air chamber is arranged in correspondence with the number and position of the air distribution plates 413 to correspond to the plurality of air inlets. Achieve uniform air distribution. The air distribution holes are arranged on the air distribution plates 413, and the air distribution holes are arranged in a matrix; the height of the plurality of air distribution plates 413 gradually decreases along the flow direction of the fuel, and the adjacent air distribution plates 413 are connected by the dividing plates 414, and the dividing plates 414 are arranged at an angle, so that the fuel can slide downward. It can be understood that in order to make the fuel flow smoother, the air distribution plates 413 can also be set with a smaller inclination, and the height on the right side is lower than that on the left side. The dividing plate 414 is provided with a dividing grid 412, so as to continue to disperse the fuel, so that the fuel does not agglomerate during the flow process, and the fuel is evenly distributed on the air distribution plate 413 and is evenly sorted and processed to ensure the sorting effect.

[0056] Reference Figure 3 In a further embodiment of the present invention, the sorting box 400 includes a bottom box 401 and a cover 402, wherein the cover 402 is disposed above the bottom box 401; and the bearing assembly 410 is connected to the bottom box 401. The bearing assembly 410 is conveniently installed. The air chamber is used as a partial structure at the bottom of the bottom box 401. A discharge pipe extending obliquely downward is arranged at the right end of the cover 402, and a discharge port 430 is formed at the discharge pipe. The right side of the rightmost air distribution plate 413 extends to the upper end of the discharge pipe, so that the material output by the air distribution plate 413 will fall into the discharge pipe and be discharged from the discharge port 430.

[0057] Reference Figure 3In a further embodiment of the present invention, a material blocking assembly 900 is connected to the bottom of the cover 402, and the material blocking assembly 900 is located above the air distribution plate 413, thereby blocking the material from being directly discharged from the air outlet 421. It can be understood that the number and position of the material blocking assembly 900 and the air distribution plate 413 are correspondingly set to achieve multi-stage air separation. Under the action of the material blocking assembly 900, the fuel is scattered, and multiple air distribution plates 413 and the material blocking assembly 900 are used to perform multi-stage material blocking and air separation. The dust and fine particle fuel are discharged from the air outlet 421, and the larger particle material after air separation is discharged from the discharge port 430. In the process of vibrating conveying and fluidized sorting, the links of material distribution scattering (vibrating rod 461) and material blocking scattering (material blocking assembly 900) are added, which solves the technical problem that the existing fuel sorting device has poor sorting efficiency for sintering wet fuel.

[0058] Reference Figure 4 , Figure 5 and Figure 6 In a further embodiment of the present invention, the material blocking assembly 900 includes a mounting side plate 910 and a baffle 920. The mounting side plate is connected and fixed to the cover 402. The mounting side plate and the cover 402 can be connected and fixed by connecting rods and fasteners. It can be understood that in order to reduce the vibration of the vibration motor transmitted to the cover 402 and the material blocking assembly 900, the cover 402 and the bottom box 401 are softly connected, and only part of the structure vibrates during the vibration operation, thereby reducing the vibration load of the system. The end of the baffle 920 is connected to the mounting side plate 910, and the baffle 920 is inclined relative to the horizontal plane to increase the blocking area.

[0059] Reference Figure 4 , Figure 5 and Figure 6 In a further embodiment of the present invention, a plurality of groups of baffles 920 are provided, and the baffles 920 in the same group are arranged at intervals in the horizontal direction, and the inclination directions of the baffles 920 in adjacent groups are opposite, thereby realizing multiple material blocking, and the inclination directions of the baffles 920 in adjacent groups are opposite, which can disturb the airflow and further improve the material blocking effect.

[0060] Reference Figure 4 , Figure 5 and Figure 6In a further embodiment of the present invention, a telescopic drive mechanism 930 is installed on the mounting side plate 910, one end of the telescopic drive mechanism 930 is hinged to the mounting side plate 910, and the other end is hinged to a linkage bar 931, which can be a telescopic motor, a telescopic cylinder or a telescopic oil cylinder. The telescopic drive mechanism 930 can drive the linkage bar 931 to telescope. In order to achieve stable driving, the telescopic drive mechanism 930 has two groups symmetrically in the upper and lower parts, so as to connect and drive the linkage bar 931 in the upper and lower positions, so that the linkage bar 931 can run stably, and because the two ends of the telescopic drive mechanism 930 are hinged, structural interference is avoided, so that the linkage bar 931 can move smoothly left and right. The end of the baffle 920 is provided with a hinged plate 921, which is hinged to the mounting side plate 910. The hinged plates 921 on the baffles 920 of the same group are connected in series through a series rod 940. The series rod 940 is hinged to the hinged plate 921, and the hinged position of the series rod 940 and the hinged plate 921 and the hinged position of the hinged plate 921 and the mounting side plate 910 are staggered. The linkage bar 931 is hinged to the series rods 940 corresponding to all groups of baffles 920. By using the functions of the series rod 940 and the linkage bar 931, the linkage bar 931 can drive all baffles 920 to rotate and change the inclination angle to adjust the material blocking effect.

[0061] Although reducing the proportion of -0.5mm particle size fuel in sintering fuel by the sintering wet light fine fuel sorting system proposed by the present invention can improve the utilization efficiency of fuel in the sintering process and reduce solid energy consumption, after removing the -0.5mm particle size fuel, the amount of fuel available for sintering production will also be reduced. Therefore, in order to meet the requirements of sintering production, it is necessary to supplement fuel to compensate for the heat loss caused by the removal of -0.5mm particle size fuel before and after air selection. The present invention also provides a calculation method to calculate the fuel that needs to be supplemented:

[0062] Steel PlantAm 2 Sintering machine, production coefficient is Bt / m 2 h, the solid fuel consumption is C t / h, then the amount of fuel consumed per ton of ore is:

[0063] D=C×1000 / A×B.

[0064] Assuming that the proportion of -0.5mm particle size fuel in the sintering fuel after sorting is E%, the amount of fuel available per ton of ore is:

[0065] F = (CC x E%) 1000 / A x B.

[0066] The decrease in the amount of fuel available per ton of ore is G=DF.

[0067] After sorting, the proportion of -0.5mm particle size fuel in the sintering fuel dropped to 15%, and the corresponding solid energy consumption value dropped by Hkg / t.

[0068] The amount of solid fuel that needs to be supplemented is

[0069] J = GH.

[0070] Steel Plant 360m 2 Taking the sintering machine as an example, the production coefficient is 1.35t / m 2 ·h, the solid fuel consumption is 25t / h, then the amount of fuel consumed per ton of ore is:

[0071] 25×1000 / 360×1.35=51.44kg / t.

[0072] Assuming that the -0.5mm particle size fuel accounts for 15% of the sintering fuel after sorting, the amount of fuel available per ton of ore is:

[0073] (25-25×15%)1000 / 360×1.35=43.72kg / t.

[0074] The decrease in the amount of fuel available per ton of ore is:

[0075] 51.44-43.72=7.72kg / t.

[0076] Figure 7 The solid energy consumption values ​​of sintered ore corresponding to different proportions of -0.5mm particle size fuel are given. As the proportion of -0.5mm particle size fuel in the sintering fuel decreases from 30% to 15% before and after sorting, the corresponding solid energy consumption value decreases by 2.66kg / t.

[0077] Therefore, the amount of solid fuel required to be supplemented is

[0078] 7.72-2.66=5.06kg / t.

[0079] According to the above calculation method, the amount of fuel that needs to be supplemented corresponding to the proportion of fuel with different -0.5mm particle size after air selection can be calculated. The calculation results are as follows: Figure 8 shown.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sintering wet light fine fuel sorting system, characterized in that: include: A feeding mechanism (100) for outputting fuel to the outside; The pre-screening mechanism (200) is used to receive the fuel outputted by the feeding mechanism (100), screen the fuel, and screen the fuel into finished fuel and large particle fuel, and output them separately and independently; A crushing mechanism (300) is used to receive the large particle fuel output by the pre-screening mechanism (200) and crush the large particle fuel; A sorting box (400), wherein a bearing assembly (410) is provided inside the sorting box (400), and the bearing assembly (410) is connected to a vibration motor (411); an air distribution hole is provided on the bearing assembly (410); the sorting box (400) is provided with an air inlet (420) below the bearing assembly (410), and an air outlet (421) above the bearing assembly (410); and the sorting box (400) is provided with a discharge port (430) on one side of the bearing assembly (410); An air supply mechanism (500) is used to deliver airflow from the air inlet (420) toward the sorting box (400); A dust collector (600) is connected to the air outlet (421) and is used to receive the airflow carrying the fine particle fuel and intercept the fine particle fuel and output it to the outside; A finished fuel conveying mechanism (700) is used to receive the fuel outputted from the discharge port (430) and the finished fuel outputted from the pre-screening mechanism (200); The fine particle fuel delivery mechanism (800) is used to receive the fine particle fuel output by the dust collector (600).

2. The sintering wet light fine fuel sorting system according to claim 1 is characterized in that: An ash discharge pipe (440) is provided at the bottom of the separation box (400), an ash discharge valve (441) is provided on the ash discharge pipe (440), and an outlet of the ash discharge pipe (440) is located above the fine particle fuel conveying mechanism (800), so that the material is output to the fine particle fuel conveying mechanism (800).

3. The sintering wet light fine fuel sorting system according to claim 1, characterized in that: A feeding mechanism (470) is provided at the upper end of one side of the sorting box (400) away from the discharge port (430), and the feeding mechanism (470) comprises a feeding hopper (471), a round roller distributor (472) and a lower hopper (473). The round roller distributor (472) is located at the lower end outlet of the feeding hopper (471) to rotate and bring the material into the lower hopper (473). The lower end of the lower hopper (473) is connected to the sorting box (400).

4. The sintering wet light fine fuel sorting system according to claim 1, characterized in that: A distribution plate (450) is provided below the lower hopper (473) in the sorting box (400). The distribution plate (450) is used to receive the fuel dropped from the lower hopper (473). The distribution plate (450) is higher than the bearing assembly (410). The distribution plate (450) and the bearing assembly (410) are connected via an inclined sliding plate (460). A vibrating rod (461) is provided on the sliding plate (460). The vibrating rod (461) partially protrudes from a side of the sliding plate (460) contacting the fuel. The vibrating rods (461) are arranged at intervals perpendicular to the fuel flow direction.

5. The sintering wet light fine fuel sorting system according to claim 4, characterized in that: The bearing assembly (410) comprises a plurality of air distribution plates (413) arranged at intervals, and the air distribution holes are arranged on the air distribution plates (413); the heights of the plurality of air distribution plates (413) gradually decrease along the flow direction of the fuel, and adjacent air distribution plates (413) are connected by a distribution plate (414), and a distribution grid (412) is arranged on the distribution plate (414).

6. The sintering wet light fine fuel sorting system according to claim 4, characterized in that: The sorting box (400) comprises a bottom box (401) and a cover (402), wherein the cover (402) is arranged above the bottom box (401); and the bearing assembly (410) is connected to the bottom box (401).

7. The sintering wet light fine fuel sorting system according to claim 6, characterized in that: The bottom of the cover (402) is connected to a material blocking assembly (900), and the material blocking assembly (900) is located above the air distribution plate (413).

8. The sintering wet light fine fuel sorting system according to claim 7, characterized in that: The material blocking assembly (900) comprises a mounting side plate (910) and a baffle (920), wherein the mounting side plate is connected and fixed to the cover (402); an end of the baffle (920) is connected to the mounting side plate (910), and the baffle (920) is arranged to be inclined relative to a horizontal plane.

9. The sintering wet light fine fuel sorting system according to claim 8, characterized in that: The baffles (920) are provided in a plurality of groups. The baffles (920) in the same group are arranged in an interval arrangement in the horizontal direction, and the baffles (920) in adjacent groups have opposite inclination directions.

10. The sintering wet light fine fuel sorting system according to claim 9, characterized in that: A telescopic driving mechanism (930) is installed on the mounting side plate (910), one end of the telescopic driving mechanism (930) is hinged to the mounting side plate (910), and the other end is hinged to a linkage bar (931), a hinged plate (921) is provided at the end of the baffle (920), the hinged plate (921) is hinged to the mounting side plate (910), the hinged plates (921) on the baffles (920) of the same group are connected in series through a series rod (940), the series rod (940) is hinged to the hinged plate (921), and the hinged position of the series rod (940) and the hinged plate (921) and the hinged position of the hinged plate (921) and the mounting side plate (910) are staggered, and the linkage bar (931) is hinged to the series rods (940) corresponding to the baffles (920) of all groups.

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