Crushing, grading and waste heat recovery all-in-one machine for high-temperature steel slag

Abstract

The utility model relates to the technical field of iron and steel smelting, in particular to a high-temperature steel slag crushing, grading and waste heat recovery all-in-one machine which comprises a steel slag crushing bin, a steel slag grading bin, a crushing mechanism and a grading mechanism, the steel slag crushing bin is provided with a conveying channel and a slag outlet, and the crushing mechanism reciprocates along the crushing channel. The steel slag classification bin is communicated with the steel slag crushing bin through the slag outlet, and the classification mechanism outputs the steel slag from different classification outlets according to the granularity of the steel slag in the steel slag classification bin; the bin wall of the steel slag crushing bin and the bin wall of the steel slag grading bin are provided with first interlayer cavities capable of allowing water to pass through and exhausting air, water can pass through the first interlayer cavities so that steel slag can be cooled, waste heat of the steel slag can be used for heating water into steam to be used, a fourth interlayer cavity is formed in the grading mechanism, and a second interlayer cavity is formed in a flue gas channel in the steel slag crushing bin. And the fourth interlayer cavity and the second interlayer cavity are communicated with the first interlayer cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steel smelting technology, and particularly relates to a high-temperature steel slag crushing, grading and waste heat recovery all-in-one machine. BACKGROUND

[0002] At present, steel slag produced in steel smelting is treated by hot stewing method, the hot stewing method is to cool high-temperature steel slag to 400-500 DEG C, and crush to a specified required particle size, then pour the steel slag into stewing tanks or stewing pools, and then perform a series of treatments such as water cooling, re-crushing, magnetic separation and the like.

[0003] When the steel slag is taken out from a smelting furnace and transferred to a cooling device, the temperature is about 800-1000 DEG C, and the steel slag is in a mixed state of molten and solid states. Since the hot stewing treatment of the steel slag has requirements on temperature and particle size, the steel slag needs to be first cooled to a required temperature and crushed to a required size before hot stewing. The steel slag cooling needs to consume a very long time, so this treatment method not only consumes a long time and has low efficiency, but also causes a large amount of heat to be wasted, and the accumulated steel slag for cooling also occupies a large amount of space. SUMMARY

[0004] The utility model wants to solve the technical problem of providing a high-temperature steel slag crushing, grading and waste heat recovery all-in-one machine, which can accelerate the cooling speed of the steel slag, utilize the heat of the steel slag, and can crush the steel slag in the cooling process, effectively improving the cooling and crushing efficiency of the steel slag.

[0005] To solve the above technical problems, the utility model adopts the technical scheme: a kind of high-temperature steel slag crushing, grading and waste heat recovery integrated machine, including steel slag crushing bin, steel slag grading bin, crushing mechanism and grading mechanism, steel slag crushing bin is provided with inlet and outlet, conveying passage is provided between inlet and outlet in steel slag crushing bin, and the side wall of steel slag crushing bin is provided with avoiding hole along conveying passage, crushing mechanism includes crushing roller, crushing driving part and walking driving part, crushing roller is set through avoiding hole, crushing roller is rotated by crushing driving part and is driven to reciprocate along conveying passage by walking driving part, and crushing tooth is provided on crushing roller corresponding conveying passage, and crushing tooth rotates and moves with crushing roller and crushes steel slag in crushing passage and is scraped to outlet, steel slag grading bin is arranged at outlet, steel slag grading bin is communicated with steel slag crushing bin and steel slag grading bin is provided with at least two grading outlets, grading mechanism is arranged in steel slag grading bin and steel slag is output from specified grading outlet according to the granularity of steel slag, and the wall of steel slag grading bin and the wall of steel slag crushing bin are provided with first interlayer cavity, and first interlayer cavity is provided with water injection interface and exhaust interface.Crushing mechanism is in steel slag crushing bin, steel slag is crushed, and steel slag is scraped to outlet at the same time, grading mechanism is in steel slag grading bin and steel slag is graded and discharged according to the granularity of steel slag, and the wall of steel slag crushing bin and the wall of steel slag grading bin are provided with first interlayer cavity, water in first interlayer cavity is heated to gaseous state using the heat of steel slag, which is not only beneficial to steel slag cooling, but also can fully utilize the waste heat of steel slag.

[0006] As optional technical scheme of the utility model, steel slag crushing bin is provided with flue gas outlet, flue gas passage is arranged in steel slag crushing bin, flue gas passage is communicated with flue gas outlet, and the passage wall of flue gas passage is provided with second interlayer cavity, and second interlayer cavity is communicated with first interlayer cavity.Flue gas passage can be used to discharge high-temperature flue gas of steel slag, and the heat of high-temperature flue gas can be utilized.

[0007] As optional technical scheme of the utility model, at least one baffle is arranged in flue gas passage, third interlayer cavity is arranged in baffle, and third interlayer cavity is communicated with second interlayer cavity and / or first interlayer cavity.Baffle is arranged in flue gas passage, which can prolong the running distance of high-temperature flue gas and improve the utilization effect of the heat of high-temperature flue gas.

[0008] As optional technical scheme of the utility model, grading mechanism includes grading screen, fourth interlayer cavity is arranged in grading screen, fourth interlayer cavity is communicated with first interlayer cavity, and flue gas inlet of flue gas passage is arranged above grading screen.Fourth interlayer cavity is arranged in grading screen, which is beneficial to steel slag cooling when grading steel slag and improves the utilization efficiency of steel slag waste heat.

[0009] As optional technical scheme of the utility model, the steel slag grading bin is provided with two grading outlets, which are first grading outlet and second grading outlet respectively, the grading screen is arranged above the first grading outlet, and the screen surface is inclined to the direction where the second grading outlet is located.

[0010] As optional technical scheme of the utility model, the grading screen comprises fixed grading screen and vibrating grading screen, the vibrating mounting piece is arranged above the first grading outlet, the vibrating grading screen is arranged above the first grading outlet through the vibrating mounting piece, and the vibrating grading screen is driven to vibrate by the vibrating driving piece arranged outside the steel slag grading bin, the low end of the vibrating grading screen is at the second grading outlet, the fixed grading screen is connected with the bin wall of the steel slag grading bin, and the low end of the fixed grading screen is above the vibrating grading screen. After the steel slag enters the steel slag grading bin, the steel slag falls to the fixed grading screen first, and then disperses to the vibrating grading screen along the fixed grading screen, the fixed grading screen and the vibrating grading screen cooperate to realize the grading effect of the steel slag, and the vibrating grading screen is also prevented from being damaged by the impact of the steel slag.

[0011] As optional technical scheme of the utility model, the pair of roller type crushing mechanism is arranged above the fixed grading screen at the slag outlet;

[0012] Or, the single roller type crushing mechanism is arranged at the upper screen surface of the fixed grading screen, and the single roller type crushing mechanism cooperates with the fixed grading screen. The pair of roller type crushing mechanism or the single roller type crushing mechanism is arranged at the fixed grading screen, so that the steel slag can be further crushed before the steel slag grading treatment.

[0013] As optional technical scheme of the utility model, the position of the crushing roller in the steel slag crushing bin is provided with a crushing cylinder, at least one first row of teeth and at least one second row of teeth are arranged on the outer wall of the crushing cylinder in the circumferential direction, the first row of teeth and the second row of teeth both comprise at least one crushing tooth, the first row of teeth and the second row of teeth are alternately distributed in the circumferential direction of the crushing cylinder, and the crushing teeth of the first row of teeth and the crushing teeth of the second row of teeth are mutually staggered in the axial direction of the crushing cylinder. The first row of teeth and the second row of teeth are alternately distributed in the circumferential direction, and the crushing teeth of the first row of teeth and the crushing teeth of the second row of teeth are staggered in the axial direction, so that the steel slag can be fully crushed and better material scraping effect can be achieved.

[0014] As optional technical scheme of the utility model, the walking rail is arranged on the outer part of the steel slag crushing bin along the conveying channel, the walking car is arranged on the walking rail, the walking driving piece is arranged on the walking car and drives the walking car to move back and forth along the walking rail, the crushing roller is arranged on the walking car through the water-cooled bearing seat, and the water-cooled cavity is arranged in the crushing roller and / or the crushing cylinder.

[0015] As optional technical scheme of the utility model, the avoiding hole is arranged on the opposite two side walls of the steel slag crushing bin, the walking rail is arranged on the opposite two sides of the steel slag crushing bin, the walking car is arranged on each walking rail, and the two ends of the crushing roller are arranged outside the steel slag crushing bin and connected with the two walking cars respectively.

[0016] Or, the steel slag crushing chamber is provided with a telescopic sealing structure at the avoiding hole, and the crushing roller is connected with the telescopic sealing structure and rotates relative to the telescopic sealing cover.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1、The steel slag crushing chamber is provided with a conveying channel, the crushing roller is provided with crushing teeth corresponding to the crushing channel, the crushing roller is driven to rotate by a crushing driving element and is driven to reciprocate along the conveying channel by a walking driving element, the crushing teeth rotate with the crushing roller and reciprocate along the conveying channel, which not only can crush the steel slag in the conveying channel, but also can scrape the steel slag to the discharge port;

[0019] 2、The steel slag grading chamber is provided with a first grading outlet and a second grading outlet, the fixed grading screen and the vibrating grading screen are both obliquely arranged above the first grading outlet and are both located at the slag discharge port, when the steel slag in the steel slag crushing chamber enters the steel slag grading chamber from the slag discharge port, the steel slag first falls to the fixed grading screen, the fixed grading screen screens the steel slag and the steel slag on the fixed grading screen also moves to the vibrating grading screen, so that the vibrating grading screen is prevented from being damaged by long-time impact of the steel slag, the fixed grading screen and the vibrating grading screen cooperate to grade the steel slag, the steel slag with a small particle size meeting the requirements is discharged from the first grading outlet, and the steel slag with a large particle size is discharged from the second grading outlet;

[0020] 3、The steel slag crushing chamber and the steel slag grading chamber are both provided with a first interlayer cavity, the first interlayer cavity is provided with a water injection interface and an exhaust interface, in the crushing and grading process of the steel slag, the high-temperature steel slag heats the water in the first interlayer cavity into steam, so that the waste heat of the steel slag is utilized and the cooling speed of the steel slag is improved; the fourth interlayer cavity is arranged in the grading screen of the grading mechanism, so that the heat of the steel slag is utilized to accelerate the cooling speed of the steel slag while the steel slag is screened;

[0021] 4、The steel slag crushing chamber is provided with a flue gas channel for discharging high-temperature flue gas, the channel wall of the flue gas channel is provided with a second interlayer cavity, the second interlayer cavity is communicated with the first interlayer cavity, the flue gas channel is provided with a baffle plate, the moving path of the flue gas can be improved, the third interlayer cavity is arranged in the baffle plate, the third interlayer cavity is communicated with the first interlayer cavity or the second interlayer cavity, so that the waste heat of the high-temperature flue gas is utilized and the temperature of the high-temperature flue gas when being discharged is reduced;

[0022] 5、The crushing roller is installed through a water-cooled bearing seat, the crushing roller and the crushing cylinder are provided with a water-cooled cavity, cooling water is continuously supplied to the water-cooled cavity, so that the action parts of the crushing mechanism can be cooled. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described in the following only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 It is a structure diagram of the broken, grading and waste heat recovery all-in-one machine;

[0025] Figure 2 It is a structure diagram of the steel slag broken bin and broken mechanism;

[0026] Figure 3 It is a structure diagram of the steel slag grading bin and grading mechanism;

[0027] Figure 4 It is a structure diagram of the broken mechanism;

[0028] In the figure: 1, steel slag broken bin, 11, slag inlet, 12, slag outlet, 13, conveying channel, 14, flue gas outlet, 15, flue gas channel, 16, baffle, 2, steel slag grading bin, 21, first grading outlet, 22, second grading outlet, 3, broken mechanism, 31, broken roller, 32, broken driving part, 33, walking driving part, 34, walking rail, 35, walking vehicle, 36, broken cylinder, 37, telescopic sealing cover, 4, grading mechanism, 41, fixed grading screen, 42, vibrating grading screen, 43, vibrating driving part. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0030] As Figures 1-4 shown, a broken, grading and waste heat recovery all-in-one machine for high-temperature steel slag includes a steel slag broken bin 1, a steel slag grading bin 2, a broken mechanism 3 and a grading mechanism 4. The steel slag broken bin 1 is provided with a slag inlet 11 at the front end, and a slag outlet 12 at the rear end. A conveying channel 13 is arranged between the slag inlet 11 and the slag outlet 12 in the steel slag broken bin 1. High-temperature steel slag can be finally discharged from the slag outlet 12 along the conveying channel 13 after being loaded into the steel slag broken bin 1 from the slag inlet 11.

[0031] Please refer to Figure 1、 Figure 2 and Figure 4 The steel slag breaking bin 1 is provided with an avoiding hole on the bin wall, which is a strip-shaped hole arranged along the conveying channel 13. The breaking mechanism 3 comprises a breaking roller 31, a breaking driving part 32 and a walking driving part 33. The breaking roller 31 is arranged through the avoiding hole, and the breaking roller 31 is provided with breaking teeth at positions corresponding to the conveying channel 13. The breaking driving part 32 is used to drive the breaking roller 31 to rotate, and the walking driving part 33 is used to drive the breaking roller 31 to reciprocate along the conveying channel 13. The breaking teeth are driven to reciprocate along the conveying channel 13 while the breaking roller 31 rotates, which not only breaks the steel slag in the conveying channel 13, but also pushes the steel slag in the conveying channel 13 to the slag outlet 12, playing a role of breaking and pushing.

[0032] Specifically, the breaking roller 31 is provided with a breaking cylinder 36 at a position in the steel slag breaking bin 1. The breaking cylinder 36 is connected with the breaking roller 31 and rotates with the breaking roller 31. The outer wall of the breaking cylinder 36 is provided with a first row of teeth and a second row of teeth. The first row of teeth comprises at least one breaking tooth arranged along the axial direction of the breaking cylinder 36, and the second row of teeth comprises at least one breaking tooth arranged along the axial direction of the breaking cylinder 36. The first row of teeth and the second row of teeth are one or more than one, and the first row of teeth and the second row of teeth are alternately distributed in the circumferential direction of the breaking cylinder 36. The breaking teeth of the first row of teeth and the breaking teeth of the second row of teeth are mutually staggered in the axial direction of the breaking cylinder 36. Figure 1 and Figure 2 As shown in the view angle, the breaking cylinder 36 rotates counterclockwise, and the first row of teeth and the second row of teeth break the steel slag in the conveying channel 13 at the same time, and also push the steel slag in the conveying channel 13 to the direction of the slag outlet 12. Preferably, the first row of teeth and the second row of teeth each comprise at least two breaking teeth. By reasonably arranging the spacing of the breaking teeth of the first row of teeth and / or the spacing of the breaking teeth of the second row of teeth, the breaking effect on the steel slag can be adjusted.

[0033] The steel slag breaking bin 1 is provided with a walking track 34 arranged along the conveying channel 13. The steel slag breaking bin 1 is provided with a walking vehicle 35 arranged on the walking track 34 and configured with a walking wheel capable of cooperating with the walking track 34. The walking driving part 33 drives the walking wheel to rotate, thereby driving the walking vehicle 35 to reciprocate along the walking track 34. The walking driving part 33 is a driving component in the form of a motor, a walking motor, etc. The walking vehicle 35 is provided with a bearing seat structure suitable for mounting the breaking roller 31. The breaking roller 31 is mounted on the walking vehicle 35 and rotates relative to the walking vehicle 35. The rotating part of the breaking driving part 32 is in transmission connection with the breaking roller 31. The breaking driving part 32 drives the breaking roller 31 to rotate. The breaking driving part 32 is a rotating driving component in the form of a motor, etc.

[0034] Further, the crushing roller 31 is connected with the walking vehicle 35 through a water-cooled bearing seat, and a water-cooled cavity is arranged in the crushing roller 31 and / or the crushing cylinder 36, the water-cooled cavity is communicated with the water injection space of the water-cooled bearing seat, and the water-cooled bearing seat and the water-cooled cavity are continuously injected with cooling water, so that the crushing roller, the crushing cylinder and the water-cooled bearing seat can be cooled, so that the crushing mechanism 3 can be used in a high-temperature environment for a long time, and deformation and damage caused by long-time high temperature in the steel slag crushing chamber 1 are avoided. The water-cooled bearing seat and the water-cooled cavity are also provided with exhaust holes, and water vapor generated by the cooling water can be discharged from the exhaust holes for power generation or storage in a gas pocket.

[0035] Further, the steel slag crushing chamber 1 is provided with an avoiding hole on each of the opposite two side walls, and the opposite two sides of the steel slag crushing chamber 1 are provided with walking rails 34, and the walking vehicles 35 are arranged on the walking rails 34. The two ends of the crushing roller 31 respectively extend out of the steel slag crushing chamber 1 through the two avoiding holes and are connected with the two walking vehicles 35 respectively. The two walking vehicles 35 can be provided with walking driving members 33 or one of the two walking vehicles 35 is provided with a walking driving member 33.

[0036] Please refer to Figure 4 , the steel slag crushing chamber 1 is provided with a telescopic sealing structure at the avoiding hole, the telescopic sealing structure is used to block the avoiding hole, the telescopic sealing structure is a telescopic cover or other telescopic blocking structure, and the crushing roller 31 is connected with the telescopic sealing structure and can rotate relative to the telescopic cover 37. When the crushing roller 31 moves towards the slag inlet 11, the telescopic sealing structure is contracted between the crushing roller 31 and the slag inlet 11 and is elongated between the crushing roller 31 and the slag outlet 12. When the crushing roller 31 moves towards the slag outlet 12, the telescopic sealing structure is elongated between the crushing roller 31 and the slag inlet 11 and is contracted between the crushing roller 31 and the slag outlet 12, so that the avoiding hole is always in a blocked state.

[0037] Please refer to Figure 1 and Figure 3 , the steel slag grading chamber 2 is arranged at the slag outlet 12, the steel slag grading chamber 2 is communicated with the steel slag crushing chamber 1 through the slag outlet 12, and the steel slag falls into the steel slag grading chamber 2 after leaving the steel slag crushing chamber 1 through the slag outlet 12. The bottom of the steel slag grading chamber 2 is provided with at least two grading outlets, and the steel slag grading chamber 2 is provided with a grading mechanism 4, and the grading mechanism 4 is used to distribute the steel slag to the specified grading outlet according to the particle size of the steel slag.

[0038] The grading outlets are preferably two, i.e. a first grading outlet 21 and a second grading outlet 22, and the grading mechanism 4 comprises a grading screen which is obliquely arranged above the first grading outlet 21, and the screen surface of the grading screen is inclined towards the direction of the second grading outlet 22, the grading screen screens the steel slag, the steel slag with small particle size falls into the first grading outlet 21 through the grading screen, and the steel slag with large particle size falls into the second grading outlet 22 along the grading screen, and the first grading outlet 21 is provided with a retort or a steel slag transfer device, and the second grading outlet 22 is respectively provided with a steel slag container or a steel slag reprocessing mechanism.

[0039] As a preferred embodiment, the grading screen comprises a fixed grading screen 41 and a vibrating grading screen 42, a vibrating mounting member is arranged above the first grading outlet 21, the vibrating mounting member is an elastic mounting structure for mounting the vibrating screen, the vibrating grading screen 42 is obliquely arranged above the first grading outlet 21 through the vibrating mounting member, and the low end of the vibrating grading screen 42 extends to the second grading outlet 22; the outside of the steel slag grading bin 2 is provided with a vibrating driving member 43, which can be a vibrating motor or a vibrating driving part formed by combining a common driving motor and a vibrating driver, and the vibrating output part of the vibrating driving member 43 is provided with a connecting rod, a through hole is arranged on the bin wall of the steel slag grading bin 2, and the connecting rod is connected with the vibrating grading screen 42 through the through hole so that the vibrating driving member 43 can drive the vibrating grading screen 42 to vibrate.

[0040] The fixed grading screen 41 is also obliquely arranged, the fixed grading screen 41 is connected with the bin wall of the steel slag grading bin 2, and the low end of the fixed grading screen 41 is above the vibrating grading screen 42, and in the direction of the conveying channel 13, the fixed grading screen 41 is between the slag inlet 11 and the vibrating grading screen 42. After the steel slag in the steel slag crushing bin 1 falls into the steel slag grading bin 2 from the slag outlet 12, it directly falls onto the fixed grading screen 41, and then disperses along the screen surface of the fixed grading screen 41 to the vibrating grading screen 42, the steel slag with small particle size falls from the screen holes of the fixed grading screen 41 or the vibrating grading screen 42 to the first grading outlet 21 below, and the steel slag with large particle size falls along the screen surface of the fixed grading screen 41 and the vibrating grading screen 42 to the second grading outlet 22. The fixed grading screen 41 is fixedly installed, the steel slag falling into the steel slag grading bin 2 first falls onto the fixed grading screen 41, and then slides along the fixed grading screen 41 to the vibrating grading screen 42, which can avoid the impact of a large amount of steel slag on the vibrating grading screen 42, and further avoid damage to the vibrating grading screen 42.

[0041] The pair of roller crushing mechanism 3 can be arranged above the fixed grading screen 41 at the slag outlet 12. The steel slag in the steel slag crushing chamber 1 is crushed again by the pair of roller crushing mechanism 3 before entering the steel slag grading chamber 2, and then is graded by the grading mechanism 4. The upper screen surface of the fixed grading screen 41 can also be provided with a single roller crushing mechanism 3. The single roller crushing mechanism 3 includes a crushing pressure roller driven to rotate by a rotary driving assembly. The crushing pressure roller cooperates with the upper screen surface of the fixed grading screen 41 to crush the steel slag passing between the two. The fixed grading screen 41 can also be an arc-shaped screen to improve the crushing effect of the single roller crushing mechanism 3.

[0042] When the grading outlets are more than two, the number and form of the grading screens can be reasonably arranged according to the number of the grading outlets. For example, when the grading outlets are three arranged side by side, the grading screens include a first screen plate, a second screen plate and an inclined baffle. The three grading outlets are a first grading outlet 21, a second grading outlet 22 and a third grading outlet. The first screen plate is arranged obliquely above the first grading outlet 21 and the second grading outlet 22, and the low end of the first screen plate is at the third grading outlet. The second screen plate is arranged obliquely above the first grading outlet 21 and below the first screen plate, and the low end of the second screen plate is at the second grading outlet 22. The inclined baffle is arranged obliquely between the first screen plate and the second screen plate, the high end of the inclined baffle is connected to the low end of the first screen plate, and the low end of the inclined baffle is at a position close to the high end of the second screen plate. The steel slag entering the steel slag grading chamber 2 first falls on the first screen plate. The steel slag with large particle size falls along the inclined first screen plate to the third grading outlet. The steel slag with small particle size passes through the screen holes of the first screen plate and falls on the inclined baffle, and then falls along the inclined baffle to the second screen plate. Then, the steel slag is sorted by the second screen plate and is distributed to the first grading outlet 21 and the second grading outlet 22.

[0043] The steel slag loaded into the steel slag crushing chamber 1 from the slag inlet 11 has a high temperature. In order to fully utilize the residual heat of the steel slag, the chamber wall of the steel slag crushing chamber 1 and the chamber wall of the steel slag grading chamber 2 are provided with first interlayer cavities. The two first interlayer cavities can be independently arranged or connected. The first interlayer cavities are provided with water injection interfaces and exhaust interfaces. The water injection interfaces are connected to water supply equipment or water supply pipelines to continuously inject water into the first interlayer cavities. The exhaust interfaces are connected to gas pockets or steam pipelines to continuously output steam from the first interlayer cavities. During the steel slag treatment process, the high-temperature steel slag in the steel slag crushing chamber 1 and the steel slag grading chamber 2 heats the water in the first interlayer cavities into a gaseous state and outputs the water from the exhaust interfaces. The heat of the steel slag is utilized, and the cooling speed of the steel slag is also accelerated.

[0044] Further, the fourth interlayer cavity is arranged in the classification screen of the classification mechanism 4, and the fourth interlayer cavity is communicated with the first interlayer cavity of the steel slag classification bin 2, so that the classification mechanism 4 can cool the steel slag while classifying the steel slag. Specifically, the classification screen includes a fixed classification screen 41 and a vibrating classification screen 42, and the fourth interlayer cavity is arranged in the fixed classification screen 41 and the vibrating classification screen 42. The fixed classification screen 41 is connected with the inner wall of the steel slag classification bin 2, and the fourth interlayer cavity of the fixed classification screen 41 is directly communicated with the first interlayer cavity. The vibrating classification screen 42 is provided with a connecting pipe, and the vibrating classification screen 42 is communicated with the fourth interlayer cavity through the connecting pipe. The connecting pipe is a flexible pipe which can be deformed, so as to adapt to the position deviation of the vibrating classification screen 42 caused by vibration.

[0045] In some embodiments, the fixed classification screen 41 and the vibrating classification screen 42 are in the form of a sieve plate provided with a plurality of sieve holes on the plate surface and provided with the fourth interlayer cavity in the plate surface. In other embodiments, the fixed classification screen 41 and the vibrating classification screen 42 include a plurality of pipes arranged side by side and sequentially communicated, or include a plurality of pipes arranged staggeredly and communicated, and the gaps between the pipes form the sieve holes.

[0046] Please refer to Figure 1 and Figure 2 The steel slag crushing bin 1 is further provided with a flue gas outlet 14, and the high-temperature flue gas in the steel slag crushing bin 1 and the steel slag classification bin 2 can be discharged from the flue gas outlet 14. The steel slag crushing bin 1 is provided with a flue gas passage 15 communicated with the flue gas outlet 14. The passage wall of the flue gas passage 15 is provided with a second interlayer cavity communicated with the first interlayer cavity of the steel slag crushing bin 1. During the movement of the high-temperature flue gas along the flue gas passage 15, the high-temperature flue gas heats the water in the second interlayer cavity into a gaseous state, so as to realize the cooling of the high-temperature flue gas and the utilization of the waste heat in the high-temperature flue gas.

[0047] The flue gas inlet of the flue gas passage 15 is arranged at the slag outlet 12 and located above the classification screen. The arrangement of the flue gas inlet at this position is not only beneficial to the discharge of the high-temperature flue gas in the steel slag crushing bin 1 and the steel slag classification bin 2, but also beneficial to the discharge of the smoke dust generated during the classification of the steel slag.

[0048] Further, in order to improve the waste heat utilization effect of the high-temperature flue gas and the high-temperature smoke dust, at least one baffle 16 is arranged in the flue gas passage 15. The baffle 16 is connected with the inner wall of the flue gas passage 15, and the baffle 16 is provided with a third interlayer cavity communicated with the second interlayer cavity. In the case that the flue gas passage 15 is formed by the bin wall of the steel slag crushing bin 1, the third interlayer cavity of some baffles 16 can also be communicated with the first interlayer cavity of the steel slag crushing bin 1.

[0049] The baffle 16 is arranged in the flue gas passage 15, which can prolong the length of the flue gas passage 15 under the condition of a certain space, so that the high-temperature flue gas can walk a longer distance before being discharged from the flue gas outlet 14, and contact with the inner wall of the flue gas passage 15 and the baffle 16 for a longer time, thereby effectively utilizing the waste heat of the high-temperature flue gas. The baffle 16 is preferably a plurality of baffles, and each baffle 16 is arranged in sequence and staggered along the flue gas passage 15, so that the high-temperature flue gas continuously and tortuously walks in the flue gas passage 15.

[0050] Please refer again to Figures 1-4 When the high-temperature steel slag is sent into the steel slag crushing bin 1 from the slag inlet 11, the high-temperature steel slag is in a mixed state of molten and solid states, the high-temperature steel slag moves along the conveying passage 13 to the slag outlet 12, and heats the water in the first interlayer cavity of the steel slag crushing bin 1 into a gaseous state, the high-temperature steel slag gradually cools down and becomes solid during the moving process, the crushing mechanism 3 reciprocally moves, crushes the solid steel slag, and continuously scrapes the steel slag to the slag outlet 12, so that the steel slag can be conveyed along the conveying passage 13 to the slag outlet 12, and the conveying passage 13 can also be arranged in an inclined form to the slag outlet 12; after the steel slag enters the steel slag grading bin 2 from the slag outlet 12, the steel slag is screened by the grading mechanism 4, the water in the first interlayer cavity of the steel slag grading bin 2 and the water in the fourth interlayer cavity of each component of the grading screen are heated during the grading process of the steel slag, so that the steel slag is further cooled down, and the length of the conveying passage 13 or the scraping speed of the crushing mechanism 3 is reasonably arranged, so that the steel slag is at a temperature suitable for stewing after being graded. During the treatment of the steel slag in the steel slag crushing bin 1 and the steel slag grading bin 2, the high-temperature flue gas of the steel slag is continuously and tortuously discharged from the flue gas outlet 14 along the flue gas passage 15, and the water in the second interlayer cavity and the third interlayer cavity is heated by the high-temperature flue gas during the movement of the high-temperature flue gas in the flue gas passage 15, thereby the waste heat of the high-temperature flue gas can be utilized.

[0051] During the crushing and grading of the steel slag, the first interlayer cavity, the second interlayer cavity, the third interlayer cavity and the fourth interlayer cavity are continuously supplied with water, and the heat of the steel slag and the flue gas heats the water into steam and continuously outputs, which not only can accelerate the cooling speed of the steel slag and the flue gas, but also can fully utilize the heat of the steel slag and the flue gas, reduce energy waste, and the generated steam can be used for power generation, storage and reselling, etc., which can generate more benefits.

[0052] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A high-temperature steel slag crushing, grading and waste heat recovery all-in-one machine, characterized in that: The steel slag crushing bin (1) is provided with a slag inlet (11) and a slag outlet (12), and a conveying channel (13) is arranged between the slag inlet (11) and the slag outlet (12) in the steel slag crushing bin (1); a side wall of the steel slag crushing bin (1) is provided with an avoiding hole along the conveying channel (13); the crushing mechanism (3) comprises a crushing roller (31), a crushing driving element (32) and a walking driving element (33); the crushing roller (31) is arranged through the avoiding hole; the crushing roller (31) is driven to rotate by the crushing driving element (32) and is driven to move back and forth along the conveying channel (13) by the walking driving element (33); the crushing roller (31) is provided with crushing teeth corresponding to the conveying channel (13); the crushing teeth rotate and move with the crushing roller (31) and crush the steel slag in the crushing channel and shovel the steel slag to the slag outlet (12); the steel slag grading bin (2) is arranged at the slag outlet (12); the steel slag grading bin (2) is communicated with the steel slag crushing bin (1) and is provided with at least two grading outlets; the grading mechanism (4) is arranged in the steel slag grading bin (2) and outputs the steel slag from the specified grading outlet according to the particle size of the steel slag; the bin wall of the steel slag grading bin (2) and the bin wall of the steel slag crushing bin (1) are provided with a first interlayer cavity; the first interlayer cavity is provided with a water injection interface and an exhaust interface.

2. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 1, characterized in that: The steel slag crushing bin (1) is provided with a flue gas outlet (14); a flue gas channel (15) is arranged in the steel slag crushing bin (1); the flue gas channel (15) is communicated with the flue gas outlet (14); a channel wall of the flue gas channel (15) is provided with a second interlayer cavity; the second interlayer cavity is communicated with the first interlayer cavity.

3. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 2, characterized in that: At least one baffle (16) is arranged in the flue gas channel (15); the baffle (16) is provided with a third interlayer cavity; the third interlayer cavity is communicated with the second interlayer cavity and / or the first interlayer cavity.

4. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 2, characterized in that: The grading mechanism (4) comprises a grading screen; the grading screen is provided with a fourth interlayer cavity; the fourth interlayer cavity is communicated with the first interlayer cavity; a flue gas inlet of the flue gas channel (15) is arranged above the grading screen.

5. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 4, characterized in that: The steel slag grading bin (2) is provided with two grading outlets, namely a first grading outlet (21) and a second grading outlet (22); the grading screen is arranged above the first grading outlet (21) and the screen surface is inclined to the direction where the second grading outlet (22) is located.

6. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 5, characterized in that: The grading screen comprises a fixed grading screen (41) and a vibrating grading screen (42); a vibrating mounting element is arranged above the first grading outlet (21); the vibrating grading screen (42) is arranged above the first grading outlet (21) through the vibrating mounting element and is driven to vibrate by a vibrating driving element (43) arranged outside the steel slag grading bin (2); a low end of the vibrating grading screen (42) is located at the second grading outlet (22); the fixed grading screen (41) is connected with the bin wall of the steel slag grading bin (2) and a low end of the fixed grading screen (41) is located above the vibrating grading screen (42).

7. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 6, characterized in that: A pair of roller type crushing mechanisms (3) are arranged above the fixed grading screen (41) at the slag outlet (12). Or, the upper screen surface of the fixed classification screen (41) is provided with a single-roller crushing mechanism (3), and the single-roller crushing mechanism (3) cooperates with the fixed classification screen (41).

8. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 6, characterized in that: The position of the crushing roller (31) in the steel slag crushing bin (1) is provided with a crushing cylinder (36), at least one first row of teeth and at least one second row of teeth are distributed on the outer wall of the crushing cylinder (36) in the circumferential direction, the first row of teeth and the second row of teeth both include at least one crushing tooth, the first row of teeth and the second row of teeth are alternately distributed along the circumferential direction of the crushing cylinder (36), and the crushing teeth of the first row of teeth and the crushing teeth of the second row of teeth are mutually staggered in the axial direction of the crushing cylinder (36).

9. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 6, characterized in that: The outside of the steel slag crushing bin (1) is provided with a walking rail (34) along the conveying channel (13), the walking rail (34) is provided with a walking vehicle (35), a walking driving member (33) is arranged on the walking vehicle (35) and drives the walking vehicle (35) to move back and forth along the walking rail (34), the crushing roller (31) is arranged on the walking vehicle (35) through a water-cooled bearing seat, and the crushing roller (31) and / or the crushing cylinder (36) is provided with a water-cooled cavity.

10. The high-temperature steel slag crushing, classifying and waste heat recovering integrated machine according to claim 9, characterized in that: The opposite two side walls of the steel slag crushing bin (1) are both provided with an avoiding hole, the opposite two sides of the steel slag crushing bin (1) are both provided with a walking rail (34), the walking rail (34) is provided with a walking vehicle (35), and the two ends of the crushing roller (31) are arranged outside the steel slag crushing bin (1) and connected with the two walking vehicles (35) respectively. Or, the steel slag crushing bin (1) is provided with a telescopic sealing structure at the avoiding hole, the crushing roller (31) is connected with the telescopic sealing structure and rotates relative to the telescopic sealing cover (37).

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