CN214400579U

CN214400579U - Online cyclic processing device of converter slag

Info

Publication number: CN214400579U
Application number: CN202023326455.2U
Authority: CN
Inventors: 王松伟; 安卫春
Original assignee: Hebei Xinda Iron and Steel Group Co Ltd
Current assignee: Hebei Xinda Iron and Steel Group Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-15
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses an on-line circulating treatment device for converter slag, which comprises a slag crushing system and a slag basin conveying system; the slag crushing system comprises a processing platform, a slag receiving vehicle, a sealing water spraying mechanism, a tipper, a receiving bin, a crusher and a magnetic separation mechanism; a slag receiving vehicle is arranged on the processing platform below the converter, and a slag basin is fixedly arranged in the slag receiving vehicle; the front end of the treatment platform is provided with a hydraulic car jacking mechanism for pushing a slag receiving car to walk, the middle of the treatment platform is provided with a sealing water spraying mechanism, the tail end of the treatment platform is provided with a car dumper, a material receiving bin is arranged below the car dumper, a bottom discharge port of the material receiving bin is connected with a crusher, and an outlet of the crusher is connected with a magnetic separation mechanism. The utility model discloses with the continuous online ingot casting of converter slag, realized the dustless processing of continuous pulverization, and the iron content resource recycle on the spot, realize the effective recycle of resource, avoided external environmental pollution to realized connecing the circulation of sediment car to spout the membrane and connect the sediment, the practicality is strong.

Description

Online cyclic processing device of converter slag

Technical Field

The utility model relates to an online cyclic processing device of converter slag belongs to metallurgical casting technical field.

Background

The converter steel slag is waste slag generated in the converter steel making process, is liquid with the temperature of a discharged state being more than 1400 ℃, and mainly comprises 40-60% of calcium oxide and 13-20% of silicon oxide in chemical components; the main phase composition of the converter steel slag comprises tricalcium silicate in a hexagonal plate shape, dicalcium silicate with complete crystallization, coarse crystal grains and approximately round grain shapes, and also comprises a solid solution of metallic iron and ferrous oxide, a small amount of calcium ferrite, fayalite, f-CaO and the like.

The process for treating the converter slag at home and abroad mainly comprises the following steps: a steel slag water quenching treatment process, a steel slag hot splashing macadam treatment process, a waste heat disintegration regeneration process and the like. At present, the domestic converter slag treatment technology is mainly characterized in that a slag basin is placed below a converter, after the slag basin is filled with slag, a slag basin vehicle is started to open along a rail to feed the slag, a crown block hangs the slag basin to dump, and then various treatments are carried out or the slag basin is transported to other treatment sites through a dump truck to be treated. The existing common converter slag treatment method has the following defects:

(1) the slag basin is placed on the slag basin vehicle and at a fixed position under the furnace, and after the converter pours the slag basin for several times, the slag basin vehicle is started to move to the slag span for pouring treatment and the like; the slag basin is static relative to the converter slag dumping, so the thickness of slag is large, which causes unfavorable treatment such as later crushing;

(2) the slag basin is large in dust generated by dumping, long in diffusion time and severe in labor environment; meanwhile, the large slag blocks are transported to a treatment field by a dump truck, which is easy to cause environmental pollution;

(3) the converter slag water quenching treatment also easily causes explosion accidents;

(4) if the converter slag is piled for more than half a year to one year, the converter slag is naturally cleared by the open air or is hit by falling hammer in high altitude, which causes dust emission to cause environmental violation;

(5) some of the prior art converter slag is too complicated to process and has high cost.

Therefore, how to solve the problems of the existing converter slag treatment and reduce the environmental pollution in the treatment process becomes a problem which needs to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an online circulating treatment device for converter slag, which solves the defects of the prior art.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

an on-line circulating treatment device for converter slag comprises a slag crushing system and a slag basin conveying system; the slag crushing system comprises a processing platform, a slag receiving vehicle, a sealing water spraying mechanism, a tipper, a receiving bin, a crusher and a magnetic separation mechanism; a slag receiving vehicle is arranged on the processing platform below the converter, and a slag basin is fixedly arranged in the slag receiving vehicle; the front end of the treatment platform is provided with a hydraulic car jacking mechanism for pushing a slag receiving car to walk, the middle part of the treatment platform is provided with a sealed water spraying mechanism, the tail end of the treatment platform is provided with a car dumper, a material receiving bin is arranged below the car dumper, a discharge port at the bottom of the material receiving bin is connected with an inlet of a crusher, an outlet of the crusher corresponds to a belt of a closed belt conveyor, and a belt output end of the closed belt conveyor is connected with a magnetic separation mechanism;

the slag pot conveying system comprises an ascending rail, an ascending transport vehicle arranged on the ascending rail, a descending transport vehicle arranged on the descending rail and a return rail; the processing platform, the descending track, the returning track and the ascending track form a closed running channel.

The utility model discloses a further improvement lies in: the slag basin is of a cellular structure, and the cells are of a trapezoid structure with a large upper part and a small lower part; and the inside of the slag basin is also coated with a coating agent.

The utility model discloses a further improvement lies in: the sealing water spraying mechanism comprises a sealing cover, an inlet and an outlet which are used for a slag receiving vehicle to pass through are respectively arranged at the front end and the rear end of the sealing cover, and a water spraying pipe and a tail gas pipe are arranged at the top of the sealing cover.

The utility model discloses a further improvement lies in: the spray pipe is arranged at the front end of the sealing cover, and the spray pipe is connected with the spray head after entering the sealing cover; the tail gas pipe is arranged at the middle rear part of the sealing cover and is connected with a tail gas dust removal device of a factory.

The utility model discloses a further improvement lies in: the magnetic separation mechanism comprises at least two stages of magnetic separators, and a ball mill is arranged between the first-stage magnetic separator and the second-stage magnetic separator.

The utility model discloses a further improvement lies in: and the return track is provided with a steel wire winding mechanism for driving the slag receiving car to move, and the first winding machine and the second winding machine are respectively connected with two ends of the slag receiving car through steel wire ropes.

The utility model discloses a further improvement lies in: the slag basin conveying system also comprises a film spraying mechanism arranged on the return track.

The utility model discloses a further improvement lies in: the film spraying mechanism comprises a film coating agent storage tank, a feeding main pipe, a material distribution cavity and spraying barrels, one end of the feeding main pipe is connected with the film coating agent storage tank, the other end of the feeding main pipe is connected with the material distribution cavity, a plurality of spraying barrels are arranged at the bottom of the material distribution cavity, and the spraying barrels are communicated with the feeding main pipe through the material distribution cavity.

The utility model discloses a further improvement lies in: the number of the spraying cylinders is consistent with that of the grids in the slag basin and is correspondingly arranged, and a plurality of spraying holes are formed in the bottom and the side wall of each spraying cylinder.

The utility model discloses a further improvement lies in: the material distributing cavity is fixed through a support frame, and a feeding cylinder capable of pushing the material distributing cavity to move up and down is arranged on one side of the material distributing cavity.

By adopting the technical scheme, the utility model, have the effect of following technological progress:

the utility model provides an on-line circulating treatment device for converter slag, which continuously and on-line casts the converter slag to realize continuous pulverization and dust-free treatment, and the iron-containing resource is recycled on the spot to realize effective recycling of the resource; the slag powder which can not be recycled is transported by a tank car, so that the pollution to the external environment is avoided. Meanwhile, the slag receiving vehicle for containing the converter slag can run circularly, and the practicability is greatly improved.

The utility model uses a grid-divided slag basin, the inner wall of the slag basin is coated with the coating agent, and after converter slag is poured into the slag basin, a plurality of slag blocks with fixed size are directly formed, which is convenient for further processing; the coating agent can prevent the slag blocks from adhering to the basin wall, and is convenient for pouring the slag blocks.

The utility model discloses still be provided with sealed water spray mechanism, realize the fragmentation of sediment piece through spraying water to the sediment piece. On one hand, in the sealing cover, water and steam are hydrolyzed with free compounds such as CaO, MgO and the like in the converter slag to form calcium hydroxide and magnesium hydroxide, and the converter slag is disintegrated and crushed due to volume expansion; on the other hand, the water spray can also cause the temperature difference impact effect of the high-temperature converter slag to promote the cracking of the slag surface, the slag surface is rapidly shrunk by water cooling through expansion with heat and contraction with cold, the internal temperature is still very high, the volume is unchanged, the shrunk surface is cracked by top, the cooling water flows into the hot slag along the surface cracks and is instantly vaporized to generate the water explosion effect, and the slag is further cracked.

The utility model discloses still set up the membrane mechanism that spouts that is used for to sediment basin spraying coating agent, in time spout the membrane with the sediment basin when connecing the sediment car in returning the track, ensure to get into the inside membrane cloth of sediment basin that connects the sediment process intact.

Drawings

FIG. 1 is a schematic top view of the apparatus of the present invention located in the above ground;

FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of the connection of the equipment located in the underground part of the present invention;

FIG. 4 is a schematic view of the top view structure of the slag basin of the present invention;

FIG. 5 is a schematic structural view of the film spraying mechanism of the present invention;

in the drawings, the reference numerals denote: 1. an ascending rail; 2. an ascending transport vehicle; 3. a converter; 4. a slag receiving vehicle; 5. a slag basin; 6. a processing platform; 7. a hydraulic car jacking mechanism; 8. sealing the water spraying mechanism; 8-1, sealing cover; 8-2, a water spraying pipe; 8-3, a spray head; 8-4, tail gas pipe; 9. a car dumper; 9-1, a clamping mechanism; 9-2, turning over the mechanism; 9-3, a driving mechanism; 10. a receiving bin; 11. a crusher; 12. a belt conveyor; 13. a magnetic separator; 14. a limiting groove; 15. a track groove; 16. a sewage ditch; 17. a descending track; 18. a downlink transport vehicle; 19. returning to the track; 20-1, a feeding main pipe; 20-2, a material distributing cavity; 20-3, a support frame; 20-4, a feed cylinder; 20-5, spraying a cylinder; 20-6, a coating agent storage tank; 21-a first winder; 22. a second hoist; 23. a steel cord.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and embodiments:

as shown in fig. 1 to 5, the on-line circulating treatment device for converter slag comprises a slag crushing system and a slag basin conveying system.

The slag crushing system comprises a processing platform 6, a slag receiving car 4, a sealing water spraying mechanism 8, a car dumper 9, a receiving bin 10, a crusher 11 and a magnetic separation mechanism.

The treatment platform 6 is arranged below the converter 3, a slag receiving car 4 is arranged on the treatment platform 6, and a slag basin 5 is fixedly arranged in the slag receiving car 4; when the slag receiving vehicle 4 runs to the front end of the processing platform 6, the slag basin 5 is correspondingly arranged right below the furnace mouth of the converter 3, and the slag directly flows into the slag basin 5 when the converter 3 is turned over. The front end of the processing platform 6 is also provided with a hydraulic jacking mechanism 7 for pushing the slag receiving car 4 to walk.

And a sealing water spraying mechanism 8 is arranged in the middle of the treatment platform 6 and is used for spraying water to crush the furnace slag. The sealing water spraying mechanism 8 comprises a sealing cover 8-1, and the front end and the rear end of the sealing cover 8-1 are respectively provided with an inlet and an outlet for the slag receiving car 4 to pass through; a water spray pipe 8-2 and an exhaust pipe 8-4 are arranged at the top of the sealing cover 8-1, the water spray pipe 8-2 is arranged at the front end of the sealing cover 8-1, and the water spray pipe 8-2 is connected with a spray head 8-3 after entering the sealing cover 8-1 and is used for spraying water to the slag; the tail gas pipe 8-4 is arranged at the middle rear part of the sealing cover 8-1, the tail gas pipe 8-4 is connected with a tail gas dust removal device of a factory, and dust-containing steam generated after slag water spraying is discharged from the tail gas pipe 8-4.

The tail end of the processing platform 6 is provided with a tippler 9, the tippler 9 comprises a clamping mechanism 9-1, a turnover mechanism 9-2 and a driving mechanism 9-3, and a receiving bin 10 is arranged below the tippler 9. When the slag receiving car 4 runs to the tipper 9 and is clamped by the clamping mechanism 9-1, the driving mechanism 9-3 drives the turnover mechanism 9-2 to act, so that the slag receiving car 4 is turned over, and slag in the slag basin 5 is poured into the receiving bin 10. The receiving bin 10 is a conical bin with a large upper part and a small lower part, a discharge hole at the bottom of the receiving bin 10 is connected with an inlet of the crusher 11, an outlet of the crusher 11 corresponds to a belt of the closed belt conveyor 12, and an output end of the closed belt conveyor 12 is connected with the magnetic separation mechanism.

The magnetic separation mechanism comprises at least two stages of magnetic separators 13, a ball mill is arranged between the two stages of magnetic separators 13, and the outlet of the ball mill is connected with a second-stage magnetic separator through a belt conveyor. And (4) further crushing the iron-free slag blocks subjected to the primary magnetic separation into finer particles in a ball mill, and performing secondary magnetic separation again to fully recover iron-containing materials in the slag.

A sewage ditch 16 is further arranged below the belt of the closed belt conveyor 12, the sewage ditch 16 is connected with an industrial water treatment station through a pipeline, and the sprayed sewage is treated and then pumped back to the sealing water spraying mechanism 8 by a water pump for recycling as spraying water.

As shown in fig. 4, the slag basin 5 is a cellular structure, the basin body is divided into a plurality of cells, and the cells are in a trapezoidal structure with a large upper part and a small lower part; in this example, the size of the lattice is a square of 300mm × 300mm, the height is 200mm, and the number of lattices is 12. After the liquid slag is poured into the slag basin 5, the liquid slag is directly divided into a plurality of slag blocks of 300mm multiplied by 200mm, which is beneficial to further crushing the slag. The coating agent, such as powdery talcum powder and liquid oily coating agent, is coated inside the slag basin 5, so that slag is prevented from being adhered to the inner wall of the slag basin 5, and the discharging difficulty of slag blocks is reduced.

Preferably, the top of the processing platform 6 is provided with a track groove 15 matched with the wheel position of the slag receiving car 4, and when the hydraulic jacking mechanism 7 pushes, the slag receiving car 4 moves linearly in the track groove 15.

Preferably, the top of the sealing cover 8-1 is arranged to be gradually gathered into a cone, and the exhaust pipe 8-4 is arranged at the highest position of the cone top.

Preferably, the length of the sealing cover 8-1 is not less than that of the two slag receiving vehicles 4, so as to ensure that the slag reacts completely when meeting water.

The slag pot conveying system comprises a descending transport vehicle 18, an ascending transport vehicle 2, a descending track 17, a return track 19 and an ascending track 1 which are connected in sequence. The downlink track 17 is vertically connected with the tail end of the processing platform, and the uplink track 1 is vertically connected with the front end of the processing platform. The slag receiving car is pushed to a downlink transport car 18 on a downlink track 17 after being overturned for material pouring, the downlink transport car 18 sends the slag receiving car to a return track 19, the slag receiving car transversely moves to an uplink transport car 2 on an uplink track 1, and the slag receiving car is sent back to the processing platform by the uplink transport car 2 to carry out circulating slag receiving operation.

The return track 19 is provided with a steel wire winding mechanism, and the first winding machine 21 and the second winding machine 22 are respectively connected with two ends of the slag receiving car through a steel wire rope 23 and can drive the steel wire rope 23 to move left and right on the return track 19.

The upper end surfaces of the uplink transport vehicle 2 and the downlink transport vehicle 18 are provided with limiting grooves 14 matched with the wheel positions of the slag receiving vehicles 4, the wheels of the slag receiving vehicles 4 are clamped into the limiting grooves 14, the transport vehicles are prevented from displacing in the running process, and the safety is high. The limiting groove 14 is butted with a track groove 15 on the processing platform, so that the slag receiving vehicle can smoothly move among the ascending track 1, the processing platform and the descending track 17.

The slag pot conveying system also comprises a film spraying mechanism arranged on the return track 19. As shown in FIG. 5, the film spraying mechanism comprises a film coating agent storage tank, a feeding main pipe 20-1, a material distributing cavity 20-2, a support frame 20-3 and a feeding cylinder 20-4. One end of the main feeding pipe 20-1 is inserted into the coating agent storage tank, the other end of the main feeding pipe is connected with the distributing cavity 20-2, the bottom of the distributing cavity 20-2 is provided with a plurality of spraying cylinders 20-5, and the spraying cylinders 20-5 are communicated with the main feeding pipe 20-1 through the distributing cavity 20-2; the number of the spraying cylinders 20-5 is consistent with the number of the lattices in the slag basin and is correspondingly arranged, a plurality of spraying holes are formed in the bottom and the side wall of the spraying cylinder 20-5, and the coating agent is sprayed inside the lattices through the spraying cylinder 20-5. The support frame 20-3 is arranged on two sides of the return track 19 in a spanning mode, the top of the support frame 20-3 is provided with a feeding cylinder 20-4, the end part of a piston rod of the feeding cylinder 20-4 is fixedly connected with the top of the material distribution cavity 20-2, and the material distribution cavity 20-2 and the spray cylinder 20-5 are driven to move up and down along with the extension and retraction of the feeding cylinder 20-4; when the slag receiving vehicle 4 runs to the position below the film spraying mechanism, the feeding cylinder 20-4 extends out to drive the material distribution cavity 20-2 to descend, the spraying cylinder 20-5 is inserted into the corresponding deep grid, and then the film coating agent is sprayed.

The feeding main pipe 20-1 is a flexible hose, and a power pump is arranged on the feeding main pipe 20-1 to provide spraying power for the coating agent.

The utility model discloses a working process does:

the converter pours the slag into the grid-shaped slag basin, so that the slag is uniformly and thinly splashed in the slag basin and cast into smaller slag blocks. The slag receiving car is pushed by the hydraulic car pushing mechanism along the processing platform and enters the sealed water spraying mechanism, the spray head continuously sprays water to the slag with solidified surface, the water and the converter slag generate physical reaction and chemical reaction, the slag is cracked and becomes loose small blocks, simultaneously a large amount of steam is generated, and the slag dust is wrapped by the steam and then is discharged through the tail gas pipe. The slag receiving car is driven out by the sealing water spraying mechanism and then enters the tipper to be tipped, the crushed slag blocks are poured into the receiving bin and then enter the crusher to be crushed until the slag blocks are crushed

Then, the magnetic particles are conveyed to a magnetic separator through a closed belt conveyor for magnetic separation.

Carrying out magnetic separation, conveying the iron-containing slag blocks with the particle diameter of less than 60mm to a converter raw material bay, and blending and eating in a converter; and (4) feeding the rest materials into a ball mill, coarsely grinding the materials with the diameter of less than 3mm, and carrying out secondary magnetic separation. The magnetically-separated iron-containing material is also sent to a converter raw material bay, and the converter is matched and eaten; and (4) transporting the magnetically-separated iron-free materials to a slag micro powder treatment plant by using a closed tank car, and carrying out resource regeneration pollution-free treatment.

The slag receiving vehicle which has dumped the slag blocks drives into the descending transport vehicle and is sent to the return track 19 by the descending transport vehicle; through the cooperation of the first winch 21 and the second winch 22, the slag receiving vehicle enters the return rail 19 from the descending rail and stops below the film spraying mechanism, the feeding cylinder extends out to drive the material distributing cavity to descend, and the spraying cylinder 20-5 is inserted into the corresponding lattice depth of the slag basin to fully spray the film coating agent. The slag receiving vehicle sprayed with the coating agent drives into an ascending transport vehicle of the ascending track from the return track 19, and is sent back to the front end of the treatment platform by the ascending transport vehicle to circularly receive slag.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The on-line circulating treatment device for the converter slag is characterized in that: comprises a slag crushing system and a slag basin conveying system; the slag crushing system comprises a processing platform (6), a slag receiving vehicle (4), a sealing water spraying mechanism (8), a tipper (9), a receiving bin (10), a crusher (11) and a magnetic separation mechanism; a slag receiving vehicle (4) is arranged on a processing platform (6) positioned below the converter (3), and a slag basin (5) is fixedly arranged in the slag receiving vehicle (4); a hydraulic car jacking mechanism (7) for pushing the slag receiving car (4) to walk is arranged at the front end of the processing platform (6), a sealed water spraying mechanism (8) is arranged in the middle of the processing platform (6), a car dumper (9) is arranged at the tail end of the processing platform (6), a receiving bin (10) is arranged below the car dumper (9), a discharge port at the bottom of the receiving bin (10) is connected with an inlet of a crusher (11), an outlet of the crusher (11) corresponds to a belt of a closed belt conveyor (12), and a belt output end of the closed belt conveyor (12) is connected with a magnetic separation mechanism;

the slag pot conveying system comprises an ascending track (1), an ascending transport vehicle (2) arranged on the ascending track (1), a descending track (17), a descending transport vehicle (18) arranged on the descending track (17) and a return track (19); the processing platform (6), the descending track (17), the returning track (19) and the ascending track (1) form a closed running channel.

2. The on-line recycling device for converter slag according to claim 1, characterized in that: the slag basin (5) is of a cellular structure, and the cells are of a trapezoid structure with a large upper part and a small lower part; the interior of the slag basin (5) is also coated with a coating agent.

3. The on-line recycling device for converter slag according to claim 1, characterized in that: the sealing water spraying mechanism (8) comprises a sealing cover (8-1), an inlet and an outlet for a slag receiving vehicle (4) to pass through are respectively arranged at the front end and the rear end of the sealing cover (8-1), and a water spraying pipe (8-2) and a tail gas pipe (8-4) are arranged at the top of the sealing cover (8-1).

4. The on-line recycling device for converter slag according to claim 3, characterized in that: the water spray pipe (8-2) is arranged at the front end of the sealing cover (8-1), and the water spray pipe (8-2) is connected with the spray head (8-3) after entering the sealing cover (8-1); the tail gas pipe (8-4) is arranged at the middle rear part of the sealing cover (8-1), and the tail gas pipe (8-4) is connected with a tail gas dust removal device of a factory.

5. The on-line recycling device for converter slag according to claim 1, characterized in that: the magnetic separation mechanism comprises at least two stages of magnetic separators (13), and a ball mill is arranged between the first-stage magnetic separator and the second-stage magnetic separator.

6. The on-line recycling device for converter slag according to claim 1, characterized in that: the return track (19) is provided with a steel wire winding mechanism for driving the slag receiving car (4) to move, and the first winding machine (21) and the second winding machine (22) are respectively connected with two ends of the slag receiving car (4) through steel wire ropes (23).

7. The on-line recycling device for converter slag according to claim 1, characterized in that: the slag pot conveying system also comprises a film spraying mechanism arranged on the return track (19).

8. The on-line recycling device for converter slag according to claim 7, characterized in that: the film spraying mechanism comprises a film coating agent storage tank (20-6), a feeding main pipe (20-1), a distributing cavity (20-2) and spraying cylinders (20-5), one end of the feeding main pipe (20-1) is connected with the film coating agent storage tank, the other end of the feeding main pipe is connected with the distributing cavity (20-2), a plurality of spraying cylinders (20-5) are arranged at the bottom of the distributing cavity (20-2), and the spraying cylinders (20-5) are communicated with the feeding main pipe (20-1) through the distributing cavity (20-2).

9. The on-line recycling device for converter slag according to claim 8, wherein: the number of the spraying cylinders (20-5) is consistent with that of the grids in the slag basin (5) and the spraying cylinders are correspondingly arranged, and a plurality of spraying holes are formed in the bottom and the side wall of each spraying cylinder (20-5).

10. The on-line recycling device for converter slag according to claim 9, wherein: the material distribution cavity (20-2) is fixed through a support frame (20-3), and a feeding cylinder (20-4) capable of pushing the material distribution cavity (20-2) to move up and down is arranged on one side of the material distribution cavity (20-2).