阅读说明：本技术 一种钢渣破碎分级分选连续处理装置及方法 (Steel slag crushing, grading, sorting and continuous processing device and method ) 是由 胡天麒 吴龙 孙健 闾文 王会刚 吴跃东 曹静 张亮亮 卢忠飞 杜昱樊 邓湘君 于 2020-06-20 设计创作，主要内容包括：本发明涉及一种钢渣破碎分级分选连续处理装置及方法,所述钢渣破碎分级分选连续处理装置包括：给料系统(1)、料斗(2)、纵型高速回转破碎系统(3)、除铁系统(4)、风力分级分选系统(5)、出料系统(6)、料仓(7)、集尘系统(8)和控制系统(9)；钢渣由料斗(2)落入所述高速回转破碎系统(3),经过所述高速回转破碎系统(3)内的钢棒与钢渣高速回旋互相碰撞以达到破碎效果,破碎后的钢渣落入所述分选系统(5),由于重力差分选成不同粒度等级的钢渣,由各自的出料口进入料仓(7)；整个过程协同、连续进行,提高了钢渣处理的效率。(The invention relates to a steel slag crushing, grading, sorting and continuous processing device and a method, wherein the steel slag crushing, grading, sorting and continuous processing device comprises: the device comprises a feeding system (1), a hopper (2), a vertical high-speed rotary crushing system (3), an iron removal system (4), a wind classification sorting system (5), a discharging system (6), a storage bin (7), a dust collection system (8) and a control system (9); the steel slag falls into the high-speed rotary crushing system (3) from the hopper (2), steel bars in the high-speed rotary crushing system (3) and the steel slag are rotated at a high speed to collide with each other so as to achieve a crushing effect, the crushed steel slag falls into the sorting system (5), and the steel slag with different granularity grades is selected due to gravity difference and enters a storage bin (7) from respective discharge ports; the whole process is carried out synergistically and continuously, and the efficiency of treating the steel slag is improved.)

1. A steel slag crushing, classifying, sorting and continuously processing device is characterized by comprising: the device comprises a feeding system (1), a hopper (2), a high-speed rotary crushing system (3), an iron removal system (4), a wind power classification sorting system (5), a discharging system (6), a storage bin (7) and a dust collection system (8); the feeding system (1) is arranged above the hopper (2), is connected with the high-speed rotary crushing system (3) through the hopper (2) and is used for feeding the steel slag subjected to magnetic separation into the high-speed rotary crushing system (3) through the hopper (2) for collision crushing, the high-speed rotary crushing system (3) is arranged above the wind power classification sorting system (5), an iron removal system (4) is arranged between the high-speed rotary crushing system (3) and the wind power classification sorting system (5) and is used for enabling the tailings subjected to magnetic substance removal through the iron removal system (4) after collision crushing to fall into the wind power classification sorting system (5), and the discharging system (6) comprises a coarse material discharging channel (13), a medium particle material discharging channel (14) and a fine material discharging channel (15); the silo (7) comprises a coarse silo (16), a medium particle silo (17) and a fine silo (18); the lower part of the wind power grading and sorting system (5) is correspondingly connected with a coarse material bin (16), a medium particle material bin (17) and a fine material bin (18) of the material bin (7) through a coarse material discharging channel (13), a medium particle material discharging channel (14) and a fine material discharging channel (15) of the discharging system (6); the dust collecting system (8) is connected above the wind power classification sorting system (5).

2. The steel slag crushing, grading, sorting and continuous processing device according to claim 1, further comprising a control system (9), wherein the control system (9) is a PLC control system which is connected with the feeding system (1), the high-speed gyratory crushing system (3), the wind grading and sorting system (5) and the dust collecting system (8) in a control manner; preferably, the gyratory crusher system (3) is a vertical high-speed gyratory crusher system (3).

3. A steel slag crushing, classifying, sorting and continuously processing device according to any one of claims 1 to 2, wherein the high speed gyratory crusher system (3) comprises a motor (10), a system housing, a crushing medium (11) and a material screen (12); the crushing medium (11) is positioned in the system shell, and the material sieve (12) is positioned at a discharge port of the system shell; the motor (10) is used for driving the crushing medium (11) to crush the steel slag in the system shell in a collision mode.

4. The steel slag crushing, classifying, sorting and continuously processing device according to one of claims 1 to 3, wherein the feeding system (1) comprises an iron remover of the feeding system (1) which is arranged at the front end of the feeding system (1), and the feeding system (1) further comprises a screw feeder which is arranged at the rear end of the feeding system (1); the iron removal system (4) comprises an iron remover and an iron discharge channel of the iron removal system (4); the iron remover of the iron removing system (4) is used for removing magnetic substances when the crushed steel slag particles pass through the iron removing system (4), and the iron discharging channel is used for discharging the magnetic substances.

5. The steel slag crushing, grading, sorting and continuous processing device according to one of claims 1 to 4, characterized in that the air classification and sorting system (5) comprises a fan, the coarse material discharging channel (13) of the discharging system (6) is arranged near the end of the fan, the fine material discharging channel (15) is arranged far from the end of the fan, and the medium particle material discharging channel (14) is arranged between the coarse material discharging channel (13) and the fine material discharging channel (15); correspondingly, the coarse material bin (16) is arranged at the end close to the fan, the fine material bin (18) is arranged at the end far from the fan, and the medium particle bin (17) is arranged between the coarse material discharging channel (16) and the fine material discharging channel (18).

6. The steel slag crushing, classifying, sorting and continuously processing device as claimed in one of claims 1 to 5, wherein the fan of the air classifying and sorting system (5) is a variable frequency fan, and the air force can be adjusted according to production requirements.

7. A steel slag crushing, classifying, sorting and continuously processing device according to any one of claims 1 to 6, wherein the dust collecting system (8) comprises a dust collecting hood (19), an electric dust collector (20) and a dust discharging device (21); the dust hood (19) is arranged above the end far away from the fan end of the wind power grading and sorting system (5), the dust hood (19) is connected with the electric dust collector (20) through a pipeline, and the dust discharging device (21) is arranged at the lower end of the electric dust collector (20). Preferably, the crushing medium (11) in the high-speed gyratory crushing system (3) is a steel ball or a steel bar. Preferably, the steel slag entering the steel slag crushing, grading, sorting and continuous processing device is stabilized steel slag.

8. A method for continuously processing steel slag by crushing, classifying, sorting, and the method comprises the following steps:

step (1): the steel slag magnetically separated by the feeding system (1) is fed into the high-speed rotary crushing system (3) through the hopper (2) by the feeding system (1), and crushing media (11) in the vertical high-speed rotary crushing system (3) collide with steel slag particles for crushing;

step (2): the crushed steel slag particles pass through an iron removal system (4), magnetic substances are removed and discharged outside, the tailings fall into a wind classification sorting system (5), and steel slag tailings in different particle size ranges are sorted by adjusting wind power;

and (3): the steel slag tailings with different particle size ranges correspondingly enter a coarse material bin (16), a medium particle material bin (17) and a fine material bin (18) of a material bin (7) through a coarse material discharging channel (13), a medium particle material discharging channel (14) and a fine material discharging channel (15) in a discharging system (6) and wait for delivery application.

9. The method according to claim 8, characterized in that the tailings are divided into three size fractions of 10-20mm, 5-10mm and 0-5mm by adjusting the wind strength of the wind classification sorting system (5) and enter the discharging system (6), 10-20mm of slag enters a coarse material discharging channel (13) in the discharging system (6), 5-10mm of slag enters a medium particle material discharging channel (14) in the discharging system (6), 0-5mm of slag enters a fine material discharging channel (15) in the discharging system (6), the slag through the discharging system (6) enters the corresponding bin (7), 10-20mm slag enters a coarse material bin (16) in the bin (7), 5-10mm slag enters a medium particle material bin (17) in the bin (7), and 0-5mm slag enters a fine material bin (18) in the bin (7).

10. Method according to one of claims 8 to 9, characterized in that the dust produced during the air classification is collected by a dust cage (19), passed through a pipe into an electric dust collector (20) and finally discharged by a dust discharge device (21), the collected dust having a particle size of less than 1mm and this fraction of material finally being passed into a fines bin (18).

Technical Field

The invention relates to a steel slag crushing, grading, sorting and continuous processing device and a method thereof, in particular to a continuous processing device and a method for crushing, grading and sorting steel slag generated in the production process of steel enterprises.

Background

China is a big country for steel production, and the annual steel yield accounts for more than 50% of the global yield. About 0.12-0.14 tons of steel slag is generated per ton of steel, and the amount of steel slag generated per year is about 1 hundred million tons. The steel slag contains a certain amount of metallic iron and iron oxide, and contains hydraulic gelling minerals such as dicalcium silicate and tricalcium silicate, and can be used as inorganic material resources, so that the steel slag has an important resource recovery value. And various resources are increasingly in short supply for a long time in China, so that the steel slag treatment and resource utilization have great economic value and significance.

The content of metallic iron in the steel slag is about 3-10%, the content of hydraulic gelling minerals is about 30-60%, and inorganic material resources in the steel slag can be more fully recovered through crushing, magnetic separation and sorting, so that the resource utilization is respectively carried out. Therefore, crushing, magnetic separation and sorting of the steel slag are key links of steel slag treatment, and how to realize efficient, environment-friendly and economic steel slag crushing and sorting treatment is the most concerned problem of the steel slag treatment process.

At present, the utilization approach of the steel slag is mainly to prepare steel slag powder or iron slag powder to be doped into building materials, and the steel slag has poor gelation activity and poor grindability, high grinding energy consumption and low product strength, so that the large-scale utilization of the steel slag is limited.

The steel slag after the stability treatment can be used in multiple ways according to the product requirements, for example, steel slag particles of 5-10mm can be used as concrete coarse aggregates, and steel slag particles of 0-5mm can be used as concrete fine aggregates or ground to be used as a cementing material. The steel slag can be utilized in multiple ways, so that large-scale utilization can be realized, and the energy consumption for grinding the steel slag can be greatly reduced.

The main steel slag crushing equipment is a rod mill, the granularity of steel slag particles entering the equipment is not limited, slag materials are coarsely crushed in the equipment and then enter grinding equipment, large-particle slag blocks occupy a certain proportion, the part of slag materials stay in the grinding equipment for a long time, the grinding difficulty is high, the grinding energy consumption is high, and the conventional steel slag crushing-screening-magnetic separation-grinding treatment production line has complicated process, large occupied area and high investment, so that the efficient and energy-saving treatment of the steel slag is limited, and the continuous production operation of steel slag crushing and sorting cannot be realized.

Short-flow, continuous, efficient and energy-saving steel slag treatment is the trend of steel slag treatment development, so novel steel slag crushing and sorting equipment needs to be developed. The device has the advantages of high automation level of equipment, small space occupation, low system investment, organized smoke emission and the like. Therefore, better pre-crushing technical equipment is provided for the steel slag pressing and hot smoldering, and the upgrading of the existing steel slag treatment technical equipment is realized.

Disclosure of Invention

Aiming at the technical problems, the steel slag feeding, crushing, magnetic separation and grading separation are arranged on a continuous line, the steel slag after stabilization enters equipment through the feeding, enters a crushing system after the first magnetic separation, is crushed to a smaller granularity by high-strength wear-resistant crushing media such as steel balls or steel bars, enters a secondary magnetic separation link, is subjected to magnetic substance removal, enters a grading separation system, and is subjected to wind power adjustment according to production requirements to obtain a steel slag product with graded granularity. The whole process is carried out synergistically and continuously, and the efficiency of treating the steel slag is greatly improved. The equipment occupies small area, has simple links, saves a large number of transportation facilities and greatly reduces the civil engineering investment; the processing links of the equipment are closely linked, so that the steel slag processing is completed in a closed system, and the investment of a flue gas processing system is reduced. In a word, the system has the advantages of high automation degree of equipment, good production continuity, high treatment efficiency, small occupied space, low system investment, standard environmental emission and the like, and can meet the requirements of environmental emission and economy of steel slag treatment.

The invention relates to a steel slag crushing, grading, sorting and continuous processing device, which comprises: the device comprises a feeding system (1), a hopper (2), a vertical high-speed rotary crushing system (3), an iron removal system (4), a wind classification sorting system (5), a discharging system (6), a storage bin (7) and a dust collection system (8); the feeding system (1) is arranged above the hopper (2), is connected with the high-speed rotary crushing system (3) through the hopper (2) and is used for feeding the steel slag subjected to magnetic separation into the high-speed rotary crushing system (3) through the hopper (2) for collision crushing, the high-speed rotary crushing system (3) is arranged above the wind power classification sorting system (5), an iron removal system (4) is arranged between the high-speed rotary crushing system (3) and the wind power classification sorting system (5) and is used for enabling the tailings subjected to magnetic substance removal through the iron removal system (4) after collision crushing to fall into the wind power classification sorting system (5), and the discharging system (6) comprises a coarse material discharging channel (13), a medium particle material discharging channel (14) and a fine material discharging channel (15); the silo (7) comprises a coarse silo (16), a medium particle silo (17) and a fine silo (18); the lower part of the wind power grading and sorting system (5) is correspondingly connected with a coarse material bin (16), a medium particle material bin (17) and a fine material bin (18) of the material bin (7) through a coarse material discharging channel (13), a medium particle material discharging channel (14) and a fine material discharging channel (15) of the discharging system (6); the dust collecting system (8) is connected above the wind power classification sorting system (5).

The steel slag crushing, classifying, sorting and continuous processing device further comprises a control system (9), wherein the control system (9) is a PLC control system and is in control connection with the feeding system (1), the high-speed rotary crushing system (3), the wind classifying and sorting system (5) and the dust collecting system (8).

Wherein the high-speed gyratory crusher system (3) comprises a motor (10), a system shell, a crushing medium (11) and a material sieve (12); the crushing medium (11) is positioned in the system shell, and the material sieve (12) is positioned at a discharge port of the system shell; the motor (10) is used for driving the crushing medium (11) to crush the steel slag in the system shell in a collision mode.

The feeding system (1) comprises an iron remover of the feeding system (1) and a screw feeder, wherein the iron remover is arranged at the front end of the feeding system (1), and the screw feeder is arranged at the rear end of the feeding system (1); the iron removal system (4) comprises an iron remover and an iron discharge channel of the iron removal system (4); the iron remover of the iron removing system (4) is used for removing magnetic substances when the crushed steel slag particles pass through the iron removing system (4), and the iron discharging channel is used for discharging the magnetic substances.

The wind power grading and sorting system (5) comprises a fan, a coarse material discharging channel (13) of the discharging system (6) is arranged at the end close to the fan, a fine material discharging channel (15) is arranged at the end far away from the fan, and a medium particle material discharging channel (14) is arranged between the coarse material discharging channel (13) and the fine material discharging channel (15); correspondingly, the coarse material bin (16) is arranged at the end close to the fan, the fine material bin (18) is arranged at the end far from the fan, and the medium particle bin (17) is arranged between the coarse material discharging channel (16) and the fine material discharging channel (18).

Wherein, the fan in the wind power grading and sorting system (5) is a variable frequency fan, and the wind power can be adjusted according to production requirements.

Wherein the dust collecting system (8) comprises a dust collecting cover (19), an electric dust collector (20) and a dust discharging device (21); the dust hood (19) is arranged above the end far away from the fan end of the wind power grading and sorting system (5), the dust hood (19) is connected with the electric dust collector (20) through a pipeline, and the dust discharging device (21) is arranged at the lower end of the electric dust collector (20).

The crushing medium (11) in the high-speed rotary crushing system (3) is a steel ball or a steel bar.

Wherein the steel slag entering the steel slag crushing, grading, sorting and continuous processing device is stabilized steel slag.

The invention relates to a method for crushing, grading, sorting and continuously processing steel slag, which comprises the following steps:

step (1): the steel slag magnetically separated by the feeding system (1) is fed into the high-speed rotary crushing system (3) through the hopper (2) by the feeding system (1), and crushing media (11) in the vertical high-speed rotary crushing system (3) collide with steel slag particles for crushing;

step (2): the crushed steel slag particles pass through an iron removal system (4), magnetic substances are removed and discharged outside, the tailings fall into a wind classification sorting system (5), and steel slag tailings in different particle size ranges are sorted by adjusting wind power;

and (3): the steel slag tailings with different particle size ranges correspondingly enter a coarse material bin (16), a medium particle material bin (17) and a fine material bin (18) of a material bin (7) through a coarse material discharging channel (13), a medium particle material discharging channel (14) and a fine material discharging channel (15) in a discharging system (6) and wait for delivery application.

The tailings are divided into three size fractions of 10-20mm, 5-10mm and 0-5mm by adjusting the wind power of the wind power classification sorting system (5) and enter the discharging system (6), 10-20mm slag enters a coarse material discharging channel (13) in the discharging system (6), 5-10mm slag enters a medium particle material discharging channel (14) in the discharging system (6), 0-5mm slag enters a fine material discharging channel (15) in the discharging system (6), slag passing through the discharging system (6) enters a corresponding bin (7), 10-20mm slag enters a coarse material bin (16) in the bin (7), 5-10mm slag enters a medium particle material bin (17) in the bin (7), and 0-5mm slag enters a fine material bin (18) in the bin (7).

Wherein, the dust generated in the wind power grading and sorting process is collected by a dust collecting cover (19), enters an electric dust collector (20) through a pipeline and is finally discharged through a dust discharging device (21), the granularity of the collected dust is less than 1mm, and the partial materials finally enter a fine material bin (18)

Preferably, the present invention relates to a steel slag crushing, classifying, sorting and continuous processing apparatus, comprising: the device comprises a feeding system, a hopper, a vertical high-speed rotary crushing system, an iron removal system, a wind power grading and sorting system, a discharging system, a storage bin, a dust collection system and a control system; the feeding system comprises an iron remover, an iron discharge channel and a screw feeder; the vertical high-speed rotary crushing system comprises a motor, a crushing medium and a material sieve; the iron removal system comprises an iron remover and an iron discharge channel; the wind power grading and sorting system comprises a fan; the discharging system comprises a coarse material discharging channel, a medium-particle material discharging channel and a fine material discharging channel; the material bins comprise a coarse material bin, a medium particle material bin and a fine material bin; the dust collecting system comprises a dust collecting cover, a motor, an electric dust collector and a dust discharging device.

Preferably, the iron remover of the feeding system is arranged at the front end of the feeding system, and the screw feeder is arranged at the rear end of the feeding system; the crushing medium is arranged in the main device of the vertical high-speed rotary crushing system, and the material sieve is arranged at the rear end of the vertical high-speed rotary crushing system; a coarse material discharging channel in the discharging system is arranged at the end close to the fan, a fine material discharging channel is arranged at the end far from the fan, and a medium particle material discharging channel is arranged between the coarse material discharging channel and the fine material discharging channel; correspondingly, the coarse material bin is arranged at the end close to the fan, the fine material bin is arranged at the end far from the fan, and the medium particle bin is arranged between the coarse material discharging channel and the fine material discharging channel.

Preferably, magnetic materials are magnetically separated from steel slag supplied materials through an iron remover, the magnetic materials are discharged through an iron discharge channel, the magnetically separated slag materials are fed into a hopper through a screw feeder and enter a vertical high-speed rotary crushing system through the hopper, crushing media in the system collide with the steel slag supplied materials, tailings are physically crushed to be fine and fall on a 20mm material sieve, steel slag particles with the particle size of less than 20mm enter an iron removal system, the steel slag particles with the particle size of more than 20mm continue to stay in the vertical high-speed rotary crushing system to be crushed until the steel slag particles can pass through the material sieve, the magnetically separated magnetic materials are discharged through the iron discharge channel, the tailings with the iron removed further enter a wind power separation system, the tailings are divided into three particle sizes of 10-20mm, 5-10mm and 0-5mm through adjusting the strength of wind power and enter a discharge system, the 10-20mm slag materials enter a coarse material discharge channel in the discharge system, 5-10mm slag enters a medium particle material discharging channel in a discharging system, 0-5mm slag enters a fine material discharging channel in the discharging system, the slag passing through the discharging system enters a corresponding bin, 10-20mm slag enters a coarse material bin in the bin, 5-10mm slag enters a medium particle bin in the bin, 0-5mm slag enters a fine material bin in the bin, dust generated in the wind power grading sorting process enters a dust collecting system and is finally discharged through a dust discharging device, the general granularity of the collected dust is smaller than 1mm, and the part of material finally enters the fine material bin.

Preferably, the control system is a PLC control system and controls the processes of feeding of the feeding system, crushing of the vertical high-speed rotary crushing system, sorting of different steel slag particles by the wind power sorting system and the like. The fan in the wind power classification sorting system is a variable frequency fan, and wind power can be adjusted according to production requirements. The slag entering the crushing and grading sorting device is steel slag after stabilization treatment. The crushing medium in the vertical high-speed gyratory crushing system can be steel balls or steel bars.

Preferably, the invention also relates to a method for crushing, classifying, sorting and continuously processing the steel slag, preferably the method for crushing, classifying, sorting and continuously processing the steel slag by adopting the steel slag crushing, classifying, sorting and continuously processing device, which comprises the following steps:

(1) feeding the steel slag subjected to magnetic separation into a vertical high-speed rotary crushing system through a hopper by using a feeding system, and performing collision crushing on crushing media in the vertical high-speed rotary crushing system and steel slag particles;

(2) the crushed steel slag particles pass through an iron removal system to remove magnetic substances and are discharged outside, the tailings fall into a wind classification sorting system, and steel slag products with required granularity are sorted by adjusting wind power;

(3) and the steel slag tailings with different particle size ranges enter the storage bins with corresponding particle size ranges through different channels in the discharging system and wait for delivery application.

The invention realizes the continuous treatment of crushing, sorting and sorting of the steel slag from the equipment and the method, adopts PLC remote control, and has the advantages of high automation degree, good production continuity, high treatment efficiency, high steel slag pulverization rate, small space occupation, low system investment, standard environmental emission, convenient production operation and the like. The method and the device greatly improve the equipment level of steel slag crushing treatment, can carry out continuous steel slag crushing and sorting treatment, change the previous multi-link treatment mode, improve the steel slag treatment efficiency and effectively reduce the steel slag investment and the production operation cost.

Drawings

FIG. 1 is a schematic view of a steel slag crushing, classifying, sorting and continuous processing device.

Fig. 2 is a schematic view of a vertical high-speed gyratory crusher system.

Detailed Description

As shown in FIG. 1, a steel slag crushing, classifying, sorting and continuous processing device comprises: the device comprises a feeding system 1, a hopper 2, a rotary crushing system 3, preferably a vertical high-speed rotary crushing system 3, an iron removal system 4, a wind classification sorting system 5, a discharging system 6, a stock bin 7, a dust collection system 8 and a control system 9; the feeding system 1 is arranged above the hopper 2, is connected with the high-speed rotary crushing system 3 through the hopper 2, and is used for feeding steel slag subjected to magnetic separation into the high-speed rotary crushing system 3 through the hopper 2 for collision crushing, the high-speed rotary crushing system 3 is arranged above the wind classification sorting system 5, an iron removal system 4 is arranged between the high-speed rotary crushing system 3 and the wind classification sorting system 5 and is used for enabling tailings, subjected to magnetic substance removal, of steel slag particles subjected to collision crushing through the iron removal system 4 to fall into the wind classification sorting system 5, and the discharging system 6 comprises a coarse material discharging channel 13, a medium particle material discharging channel 14 and a fine material discharging channel 15; the silo 7 comprises a coarse silo 16, a medium particle silo 17 and a fine silo 18; the lower part of the wind power grading and sorting system 5 is correspondingly connected with a coarse material bin 16, a medium particle bin 17 and a fine material bin 18 of the bin 7 through a coarse material discharging channel 13, a medium particle material discharging channel 14 and a fine material discharging channel 15 of the discharging system 6; the dust collecting system 8 is connected above the air classification sorting system 5. Wherein, the dust collecting system 8 comprises a dust collecting cover 19, an electric dust collector 20 and a dust discharging device 21; the dust collecting cover 19 is arranged above the end far away from the fan end of the wind power classification and separation system 5, the dust collecting cover 19 is connected with the electric dust collector 20 through a pipeline, and the dust discharging device 21 is arranged at the lower end of the electric dust collector 20. The wind power classification sorting system 5 comprises a fan, a coarse material discharging channel 13 of the discharging system 6 is arranged at the end close to the fan, a fine material discharging channel 15 is arranged at the end far from the fan, and a medium particle material discharging channel 14 is arranged between the coarse material discharging channel 13 and the fine material discharging channel 15; correspondingly, the coarse material bin 16 is arranged near the end of the fan, the fine material bin 18 is arranged far from the end of the fan, and the medium particle bin 17 is arranged between the coarse material discharging channel 16 and the fine material discharging channel 18. Wherein, the fan in the wind-force grading and sorting system 5 is a variable-frequency fan, and the wind force can be adjusted according to the production requirement.

The control system 9 is a PLC control system and is in control connection with the feeding system 1, the high-speed rotary crushing system 3, the wind power classification and separation system 5 and the dust collection system 8.

As shown in fig. 2, the high-speed gyratory crusher system 3 comprises a motor 10, a system shell, a crushing medium 11 and a material screen 12; the crushing medium 11 is positioned in the system shell, and the material sieve 12 is positioned at the discharge port of the system shell; the motor 10 is used for driving the crushing medium 11 to perform collision crushing on the steel slag in the system shell. The crushing medium 11 in the high-speed gyratory crushing system 3 is a steel ball or a steel bar.

The feeding system 1 comprises an iron remover of the feeding system 1, and is arranged at the front end of the feeding system 1, and the feeding system 1 further comprises a screw feeder which is arranged at the rear end of the feeding system 1; the iron removing system 4 comprises an iron remover and an iron discharging channel of the iron removing system 4; the iron remover of the iron removing system 4 is used for removing magnetic substances when the crushed steel slag particles pass through the iron removing system 4, and the iron discharging channel is used for discharging the magnetic substances outwards.

Wherein the steel slag entering the steel slag crushing, grading, sorting and continuous processing device is stabilized steel slag.

As shown in fig. 1, the iron remover of the feeding system 1 is arranged at the front end of the feeding system 1, and the screw feeder is arranged at the rear end of the feeding system 1; the crushing medium is arranged in the main device of the longitudinal high-speed rotary crushing system 3, and the material sieve is arranged at the rear end of the longitudinal high-speed rotary crushing system 3; a coarse material discharging channel 13 in the discharging system 6 is arranged at the end close to a fan, a fine material discharging channel 15 is arranged at the end far from the fan, and a medium particle material discharging channel 14 is arranged between the coarse material discharging channel 13 and the fine material discharging channel 15; correspondingly, the coarse material bin 16 is arranged near the end of the fan, the fine material bin 18 is arranged far from the end of the fan, and the medium particle bin 17 is arranged between the coarse material discharging channel 16 and the fine material discharging channel 18. Magnetic materials are magnetically separated from steel slag supplied materials through an iron remover, the magnetic materials are discharged through an iron discharging channel, the magnetically separated slag materials are fed into a hopper 2 through a screw feeder and enter a vertical high-speed rotary crushing system 3 through the hopper 2, a crushing medium 11 in the system collides with the steel slag supplied materials, the tailings are physically crushed to be fine and fall on a 20mm material sieve 12, steel slag particles with the particle size of less than 20mm enter an iron removing system 4, the steel slag particles with the particle size of more than 20mm continue to stay in the vertical high-speed rotary crushing system 3 for crushing until the steel slag particles can pass through the material sieve 12, the magnetically separated magnetic materials are discharged through the iron discharging channel, the tailings with further iron removed enter a wind power separation system 5, the tailings are divided into three particle sizes of 10-20mm, 5-10mm and 0-5mm through adjusting the wind power and enter a discharging system 6, the slag materials with 10-20mm enter a coarse material discharging channel 13 in the discharging system 6, 5-10mm slag enters a medium particle material discharging channel 14 in a discharging system 6, 0-5mm slag enters a fine material discharging channel 15 in the discharging system 6, the slag passing through the discharging system 6 enters a corresponding bin 7, 10-20mm slag enters a coarse material bin 16 in the bin 7, 5-10mm slag enters a medium particle bin 17 in the bin 7,0-5mm slag enters a fine material bin 18 in the bin 7, a dust hood 19 is arranged above a far fan end of the wind power grading sorting system 5, the dust hood 19 is connected with an electric dust collector 20 through a pipeline, a dust unloading device 21 is arranged at the lower end of the electric dust collector 20, dust generated in the wind power grading sorting process enters a dust collecting system 8 and is finally discharged through the dust unloading device, the collected dust generally has the particle size smaller than 1mm, and the part of material finally enters the fine material bin 18.

As shown in fig. 1-2, a method for crushing, classifying and sorting steel slag by using the device comprises the following steps: (1) the feeding system 1 feeds the magnetically-separated steel slag into the vertical high-speed rotary crushing system 3 through the hopper 2, and crushing media 11 in the vertical high-speed rotary crushing system 3 collide with steel slag particles for crushing; (2) the crushed steel slag particles pass through an iron removal system 4, magnetic substances are removed and discharged outside, tailings fall into a wind classification sorting system 5, and steel slag products with required granularity are sorted by adjusting wind power; (3) the steel slag tailings with different particle size ranges enter the storage bins 7 with corresponding particle size ranges through different channels in the discharging system 6 and wait for delivery application.