CN211595704U

CN211595704U - Steel slag recycling and smelting system

Info

Publication number: CN211595704U
Application number: CN201922484676.3U
Authority: CN
Inventors: 陈学文
Original assignee: Panzhihua Henghao Foundry Co ltd
Current assignee: Panzhihua Henghao Foundry Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-29
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a steel slag recovery smelting system, which comprises a crushing device, a smelting device, a heat supplementing device, a pelletizing device and a tail gas treatment device; the smelting device comprises a smelting furnace, the smelting furnace comprises a closed furnace body, a heating module is arranged on the inner wall of the furnace body, a feeding hole is formed in the upper end of the smelting furnace, a discharging hole is formed in the bottom of the smelting furnace, an air inlet pipe is arranged on the side wall of the smelting furnace, an exhaust pipe is arranged at the top of the smelting furnace, and the distance between the air inlet pipe and the bottom of the furnace body accounts for 1/6-; the pelletizing device is connected with the feed inlet, the crushing device is connected with the pelletizing device, and the tail gas treatment device is connected with the air outlet pipe. The smelting system with the structure can effectively solve the problem of difficult recovery of the existing steel production waste.

Description

Steel slag recycling and smelting system

Technical Field

The utility model relates to a smelting system, concretely relates to steel slag recycling smelting system.

Background

Iron and steel production produces a large amount of iron-containing waste materials, which are complex in composition and contain considerable amounts of various other metal elements and other inorganic non-metallic impurities in addition to a large amount of iron elements. The current common disposal method is to bury it as a building fill material or as solid waste. From the sustainable development perspective, the waste is a resource with misplaced positions, which causes a great deal of resource waste to the landfill disposal mode of the iron-containing waste, and meanwhile, can also generate adverse effects on the environment. Particularly, under the condition that the reserves of high-grade iron ores available for mining at the present stage are not large, the iron and steel smelting waste containing a certain amount of recoverable metal has higher economic value. At present, the technology of using steel production waste as smelting raw materials has the defects of high production cost, low recovery rate and the like, and a smelting system needs to be reasonably designed.

SUMMERY OF THE UTILITY MODEL

To the above prior art, the utility model provides a smelting system is retrieved to steel and iron slag to solve the problem of current steel production waste recycling difficulty.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the steel slag recovery smelting system comprises a crushing device, a smelting device, a heat supplementing device, a pelletizing device and a tail gas treatment device; the smelting device comprises a smelting furnace, the smelting furnace comprises a closed furnace body, a heating module is arranged on the inner wall of the furnace body, a feed inlet is arranged at the upper end of the furnace body, a discharge outlet is arranged at the bottom of the furnace body, an air inlet pipe is arranged on the side wall of the furnace body, an exhaust pipe is arranged at the top of the furnace body, and the distance between the air inlet pipe and the bottom of the furnace body

The pelletizing device is connected with the feed inlet, the crushing device is connected with the pelletizing device, and the tail gas treatment device is connected with the air outlet pipe.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, breaker includes breaker and shale shaker, and the shale shaker is located the breaker below, and the shale shaker below is provided with the transmission band, and the shale shaker is connected through the transmission band with the balling device.

Further, the pelletizing device comprises a support, a motor and a pelletizing disc, wherein the motor is fixed at the top end of the support, and the pelletizing disc is obliquely connected to the motor; the disk surface of the balling disk is provided with a scraper and an atomizing spray pipe.

Furthermore, the inclination angle of the balling disk is 30-45 degrees.

Furthermore, the heat supplementing device comprises a burner and an air blower, wherein the burner is connected with the air inlet pipe through the heat transmission pipe, and the air blower is communicated with the heat transmission pipe.

Further, the tail gas treatment device comprises a cooling tower, a filter, an exhaust fan and a chimney which are sequentially connected, and an inlet of the cooling tower is connected with the exhaust pipe.

Further, a heat insulation layer is arranged between the heating module and the outer wall of the furnace body.

Further, the heating module is an electric heating wire or a gas heating pipe.

The utility model has the advantages that:

1. the utility model discloses a smelting system can handle the iron and steel waste material that the composition is complicated, iron content is low, with it as smelting raw materials, through processes such as breakage, pelletizing, smelting, realizes the smelting and the high-efficient recovery of iron, retrieves other volatile elements simultaneously, and entire system resource recovery rate is high, and no harmful substance discharges.

2. The utility model discloses a combined use of breaker and pelletizing device in the smelting system can smash steel slag to suitable particle diameter and make globular, is favorable to appearing of useful component in the slag more, and smelting efficiency improves greatly.

3. The utility model discloses a smelting device is provided with the concurrent heating device, and the concurrent heating device can provide extra heat for smelting device, makes the material in the smelting furnace smelt more thoroughly, can make the heat distribution in the smelting furnace more even simultaneously, further promotes smelting efficiency.

4. The utility model discloses a smelting system is provided with tail gas processing apparatus, can carry out purification treatment to the tail gas after smelting, can effectively avoid causing environmental pollution.

Drawings

FIG. 1 is a schematic view showing the connection relationship between the components of the present invention;

FIG. 2 is a cross-sectional view of a smelting device;

fig. 3 is a front view of the crushing device;

FIG. 4 is a left side view of the pelletizing apparatus;

FIG. 5 is a front view of a pelletizing apparatus;

FIG. 6 is a schematic view of the connection of the various components of the exhaust gas treatment device;

wherein, 1, a crushing device; 11. a crusher; 12. vibrating screen; 13. a conveyor belt; 2. a pelletizing device; 21. a support; 22. a motor; 23. pelletizing disc; 3. a smelting device; 31. a furnace body; 32. a feed inlet; 33. an air inlet pipe; 34. a discharge port; 35. a heating module; 36. an air outlet pipe; 4. a heat-supplementing device; 41. a combustion engine; 42. a heat transfer pipe; 43. a blower; 5. a tail gas treatment device; 51. a cooling tower; 52. a filter; 53. an exhaust fan; 54. and (4) a chimney.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

The embodiment of the utility model provides an in, as shown in fig. 1 ~ 6, provide a smelting system is retrieved to steel slag, the smelting system in the utility model includes breaker 1, smelting device 2, concurrent heating device 3, pelletizing device 2 and tail gas processing apparatus 5. As shown in fig. 2, the smelting device 3 includes a smelting furnace, the smelting furnace includes a closed furnace body 31, the furnace body 31 is made of alloy steel, a heating module 35 is embedded in the inner wall of the furnace body 31, and the heating module 35 is used for heating and smelting the materials in the furnace body 31; according to the use scene, an electric heating mode, a steam heating mode, a gas heating mode or the like can be selected to heat the material, and the heating module 35 can be an electric heating wire, a heating pipe, a gas heating pipe or the like. In addition, in order to reduce heat loss and avoid scalding operators, a heat insulation layer is arranged between the hot module 35 and the outer wall of the furnace body 31. A feed inlet 32 is arranged at the upper end of the furnace body 31, and the material to be smelted enters the furnace body 31 through the feed inlet 32; a discharge port 34 is arranged at the bottom of the furnace body 31, a discharge valve is arranged at the discharge port, and the discharge valve is opened to discharge smelted materials after the smelting of the materials is completed; the side wall of the furnace body 31 is provided with an air inlet pipe 33, and the distance between the air inlet pipe 33 and the bottom of the furnace body 31 accounts for the height of the whole furnace body 31

Hot air can be supplemented into the furnace body 31 through the air inlet pipe 33 so as to better carry out the material treatmentSmelting; an exhaust pipe 36 is arranged at the top of the furnace body 31, and waste gas generated by smelting the materials is discharged through the exhaust pipe 36 and is directly discharged into the atmosphere after being treated by the waste gas treatment device 5. The pelletizing device 2 is connected with the feed inlet 32, and the crushing device 1 is connected with the pelletizing device 2.

As shown in fig. 3, the crushing device 1 includes a crusher 11 and a vibrating screen 12, the vibrating screen 12 is located below an outlet of the crusher 11, the vibrating screen 12 screens the steel slag crushed by the crusher 11, slag powder with a particle size meeting requirements falls onto a conveyor belt 13 located below the vibrating screen 12, and the conveyor belt 13 conveys the crushed slag to the pelletizing device 2 for pelletizing.

As shown in fig. 4 to 5, the pelletizing device 2 includes a bracket 21, a motor 22, and a pelletizing disc 23; the motor 22 is fixed at the top end of the bracket 21, the balling disk 23 is circular and is fixedly connected to the motor 22 in an inclined manner at an inclination angle of 30-45 degrees, and the balling disk 23 can rotate under the drive of the motor 22; the disk surface of the balling disk 23 is provided with a scraper 24 and an atomizing spray pipe 25. The conveyor belt 13 sends the crushed slag into the balling disk 23, the balling disk 23 rotates and the atomizing spray pipe 25 sprays water, and the slag powder is made into a sphere by rotation.

Globular slag gets into smelting unit 2 and smelts, heats the material through heating module 35 among the smelting process, in order to promote smelting effect, can supply the heat in to furnace body 31, makes the material be heated more evenly. In the present application, the heat supplement is realized by the heat supplement device 4, as shown in fig. 1, the heat supplement device 4 comprises a burner 41 and an air blower 43, the burner 41 is connected with the air inlet pipe 33 on the furnace body 31 through the heat transfer pipe 42, and the air blower 43 is communicated with the heat transfer pipe 42. Heat generated by combustion of the combustor 41 is sent into the furnace body 31 through the blower 43 and the heat transmission pipe 42 to supplement heat for smelting of materials in the furnace body 31.

A large amount of waste gas is generated in the material smelting process, and if the waste gas is not treated and is directly discharged, the air pollution is caused. Based on this, the smelting system in this utility model is provided with tail gas treatment device 5. As shown in fig. 6, the exhaust gas treatment device 5 includes a cooling tower 51, a filter 52, an exhaust fan 53, and a stack 54 connected in this order, and an inlet of the cooling tower 51 is connected to the exhaust pipe 36. The waste gas after smelting the materials enters the cooling tower 51 through the exhaust pipe 36 under the action of the exhaust fan 53, and enters the filter 52 after being fully cooled, the filter 52 filters and adsorbs particle impurities and harmful substances in the waste gas, so that the waste gas reaches the direct emission standard, and finally the waste gas is discharged into the atmosphere through the chimney 54.

While the present invention has been described in detail and with reference to the accompanying drawings, it is not to be considered as limited to the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. A steel slag recycling smelting system is characterized in that: comprises a crushing device (1), a smelting device (3), a heat supplementing device (4), a pelletizing device (2) and a tail gas treatment device (5); the smelting device (3) comprises a smelting furnace, the smelting furnace comprises a closed furnace body (31), a heating module (35) is arranged on the inner wall of the furnace body (31), a feeding hole (32) is formed in the upper end of the furnace body, a discharging hole (34) is formed in the bottom of the furnace body, an air inlet pipe (33) is formed in the side wall of the furnace body, an exhaust pipe (36) is formed in the top of the furnace body, and the distance between the air inlet pipe (33) and the bottom of the furnace body (31) accounts for 1/6-1/4; the pelletizing device (2) is connected with the feeding hole (32), the crushing device (1) is connected with the pelletizing device (2), and the tail gas treatment device (5) is connected with the exhaust pipe (36).

2. The steel slag recycling smelting system according to claim 1, characterized in that: breaker (1) includes breaker (11) and shale shaker (12), shale shaker (12) are located breaker (11) below, shale shaker (12) below is provided with transmission band (13), shale shaker (12) with balling device (2) pass through transmission band (13) are connected.

3. The steel slag recycling smelting system according to claim 1, characterized in that: the pelletizing device (2) comprises a support (21), a motor (22) and a pelletizing disc (23), wherein the motor (22) is fixed at the top end of the support (21), and the pelletizing disc (23) is obliquely connected to the motor (22); the disk surface of the balling disk (23) is provided with a scraper (24) and an atomizing water spray pipe (25).

4. The steel slag recycling smelting system according to claim 3, characterized in that: the inclination angle of the balling disc (23) is 30-45 degrees.

5. The steel slag recycling smelting system according to claim 1, characterized in that: the heat supplementing device (4) comprises a combustor (41) and a blower (43), the combustor (41) is connected with the air inlet pipe (33) through a heat transfer pipe (42), and the blower (43) is communicated with the heat transfer pipe (42).

6. The steel slag recycling smelting system according to claim 1, characterized in that: the tail gas treatment device (5) comprises a cooling tower (51), a filter (52), an exhaust fan (53) and a chimney (54) which are sequentially connected, and an inlet of the cooling tower (51) is connected with the exhaust pipe (36).

7. The steel slag recycling smelting system according to claim 1, characterized in that: and a heat insulation layer is arranged between the heating module (35) and the outer wall of the furnace body (31).

8. The steel slag recovery smelting system according to claim 1 or 7, characterized in that: the heating module (35) is an electric heating wire or a gas heating pipe.