Molten steel slag air quenching granulation treatment system

Abstract

The utility model provides a molten steel slag air-quenching granulation treatment system, which relates to the technical field of molten steel slag treatment and comprises a cover-type treatment room, a slag chute is arranged on one horizontal side of the treatment room, a slag sweeping conveyor is arranged at the bottom of the treatment room, an air port is arranged at the lower end of the slag chute, and a quenching fan is connected with the air port through a quenching air duct. The steel slag air quenching device is reasonable in design and simple in principle, continuous treatment operation of the molten steel slag air quenching process is achieved, the steel slag air quenching efficiency is greatly improved, closed treatment is achieved in the air quenching process, dust pollution is reduced, effective collection can be achieved, and the discharge standard is met. The treated granulated steel slag is automatically collected, manual forklift transfer is not needed, a large amount of manual labor intensity and cost are reduced, meanwhile, no wet treatment participates in the treatment process, a large amount of water resources are saved, and potential risks of steam dissipation and explosion possibly existing in wet treatment are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to molten steel slag processing technical field, especially in kind of molten steel slag air quenching granulation treatment system. BACKGROUND

[0002] Steel slag is a byproduct produced in the process of steel production, and the output of steel slag is huge. In recent years, the output of steel slag in China is 120 million tons. At present, the main processes for treating steel slag in China include hot smelting method, drum method, granulation method, hot splashing method and air quenching method. For high-fluidity molten steel slag, the air quenching method has been widely used due to its simple process and low investment, but it also has problems such as low processing efficiency, environmental pollution, low automation degree and high water consumption.

[0003] Specifically, 1. The equipment cannot be continuously operated and produces low yield of steel slag: At present, the steel slag after air quenching in the industry is transported by artificial forklift, and during the cleaning process, the related production equipment of the air quenching process needs to be stopped and cannot be continuously operated, which reduces the efficiency and yield of steel slag treatment. 2. Poor working environment with much dust: Some steel slag air quenching processes adopt an open operation mode, which will cause a large amount of dust during the steel slag air quenching process. Since it is not a closed space, it will pollute the surrounding working environment and is extremely harmful to the health of the surrounding operators. Even if indoor air quenching design is adopted, it cannot be completely sealed due to the need to reserve an access channel. 3. No automation production in the whole line and high labor intensity: The existing air quenching process does not realize automation production in the whole line. The steel slag after air quenching is transported by artificial forklift, which causes high labor intensity. At the same time, the surrounding environment is high in temperature and dust, which brings hidden dangers to personal safety. 4. Some technologies adopt wet treatment, which consumes much water and has safety risks: Some steel slag air quenching processes fall into the slag pool for water cooling after air quenching, which has the risks of steam dissipation, high water consumption and explosion. SUMMARY

[0004] In view of the problems in the background art, the utility model provides a molten steel slag air quenching granulation treatment system.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A molten steel slag air quenching granulation treatment system comprises a treatment room, characterized in that the treatment room is in a cover type, a slag chute is arranged on the horizontal side of the treatment room, and a slag sweeping conveyor is arranged at the bottom of the treatment room.

[0007] The slag chute is in communication with the inside of the treatment room, a tuyere is arranged at the lower end of the slag chute, a quenching fan is arranged on one side of the tuyere, and the quenching fan is connected with the tuyere through a quenching air duct.

[0008] The slag conveying machine comprises a driving motor, a chain, a driving wheel and a tension wheel, the driving wheel and the tension wheel are horizontally arranged at two sides of the bottom of the treatment room, the chain is arranged around the driving wheel and the tension wheel and is provided with a slag scraping plate, the driving wheel is in transmission connection with the driving motor, the bottom of the treatment room is further provided with a material separating plate, the material separating plate is located inside the arranged chain and is close to the slag scraping plate on the upper chain, and the slag conveying machine is provided with a slag tapping hole at one side of the bottom of the treatment room.

[0009] Along the conveying direction of the slag conveying machine, the slag tapping hole is provided at one side of the bottom of the treatment room.

[0010] Further, the top of the treatment room is communicated with a dust removal air duct, the dust removal air duct is communicated with a chimney and is sequentially provided with an air induction fan and a dust remover.

[0011] Further, the slag tapping groove is provided with a dumping table and is installed with a slag bag.

[0012] Further, the quenching air duct is arranged in an inclined upward manner.

[0013] Further, the slag conveying machine is provided with a beating wheel, the beating wheel is in the form of a ratchet wheel and is freely rotated along with the chain.

[0014] Further, the slag tapping hole is communicated with a storage bin or a lower conveying device.

[0015] Further, the slag conveying machine is provided with a chain cooling air duct and is provided with an independent cooling fan.

[0016] Technical effects and advantages of the present application:

[0017] The present application discloses a molten steel slag air quenching granulation treatment system, relates to the field of molten steel slag treatment technology, and comprises a treatment room, wherein the treatment room is in the form of a hood, a slag tapping groove is arranged at the horizontal side of the treatment room, a slag conveying machine is arranged at the bottom of the treatment room, a tuyere is arranged at the lower end of the slag tapping groove, a quenching fan is connected with the tuyere through a quenching air duct, the slag conveying machine comprises a driving motor, a chain, a driving wheel and a tension wheel, the present application has the advantages of reasonable design, simple principle, continuous treatment operation of the molten steel slag air quenching process, greatly improved steel slag air quenching efficiency, closed treatment in the air quenching process, reduced dust pollution, effective collection, compliance with emission standards, automatic collection of treated granulated steel slag, no need for manual forklift transfer, reduced labor intensity and cost, no wet treatment in the treatment process, saved water resources, and avoided risks of steam emission and explosion. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The present application is a schematic diagram of the principle.

[0019] Figure 2The slag conveying machine is a top view.

[0020] Figure 3 The beating wheel is a schematic view.

[0021] Figure 4 The chain cooling air duct is a schematic view.

[0022] Wherein, the reference signs are as follows: 1, treatment room; 2, slag chute; 3, slag conveying machine; 4, tuyere; 5, quenching fan; 6, quenching air duct; 7, driving motor; 8, chain; 9, driving wheel; 10, tensioning wheel; 11, slag sweeping plate; 12, material separating plate; 13, slag outlet; 14, dust removal air duct; 15, induced draft fan; 16, dust collector; 17, tipping table; 18, slag ladle; 19, beating wheel; 20, chain cooling air duct; 21, universal joint coupling. DETAILED DESCRIPTION

[0023] 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 are only part 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.

[0024] Embodiment 1

[0025] As shown in the drawings, the embodiment proposes a molten steel slag air quenching granulation treatment system for air quenching granulation treatment of molten steel slag. Specifically, it comprises a treatment room 1, wherein the treatment room 1 is in a hood type, used for covering the treatment area to avoid / reduce dust pollution. At the same time, the inner wall of the wall plate of the hood type treatment room 1 can be provided with a membrane type wall or implanted heat exchange pipeline, so as to control the internal temperature of the treatment room 1 and recover waste heat.

[0026] In addition, the horizontal side of the treatment room 1 is provided with a slag chute 2 for pouring molten steel slag, and the bottom is provided with a slag conveying machine 3 for collecting granulated steel slag. The slag chute 2 is communicated with the inside of the treatment room 1, and is provided with a tipping table 17 and a slag ladle 18 installed thereon for pouring molten steel slag. The lower end of the slag chute 2 is provided with a tuyere 4, one side of the tuyere 4 is provided with a quenching fan 5, the quenching fan 5 is connected with the tuyere 4 through a quenching air duct 6, and the quenching air duct 6 is inclined upward, and the included angle between the quenching air duct 6 and the horizontal direction is 0°-45°, preferably 10°-20°. It should be noted that the width of the tuyere 4 should be greater than the width of the slag column of molten steel slag at the outlet of the slag chute 2.

[0027] In addition, the slag conveying machine 3 collects the granulated steel slag after the air quenching granulation treatment, which comprises a driving motor 7, a chain 8, a driving wheel 9 and a tension wheel 10, the driving wheel 9 and the tension wheel 10 are horizontally arranged on both sides of the bottom of the treatment room 1, the chain 8 is arranged around the driving wheel 9 and the tension wheel 10, and is provided with a slag removal plate 11, the driving wheel 9 is in transmission connection with the driving motor 7, and the bottom of the treatment room 1 is further provided with a material separation plate 12, which is located inside the chain 8 and close to the slag removal plate 11 on the upper chain 8, and is arranged on one side of the bottom of the treatment room 1 along the conveying direction of the slag conveying machine 3, and is provided with a slag outlet 13; when the slag conveying machine 3 operates, the driving motor 7 is started to drive the chain 8 and the material separation plate 12 on it to move, and the granulated steel slag falling on the material separation plate 12 is removed to the slag outlet 13, and the slag outlet 13 is connected with the storage bin or the lower conveying equipment; it should be noted that the driving motor 7 is installed outside the treatment room 1 and is in transmission connection with the driving wheel 9 through the chain transmission mode to prevent the driving motor 7 from overheating; at the same time, in the embodiment, a beating wheel 19 is arranged at the slag conveying machine 3, the beating wheel 19 is in the form of a ratchet wheel and rotates freely with the chain 8, the distance (diameter) between the outer edge of the ratchet-shaped beating wheel 19 and the center position is variable, and the tension of the tension wheel 10 is matched to make the beating wheel 19 rotating with the chain 8 periodically vibrate during the continuous movement of the chain 8, so as to prevent the chain 8 from carrying materials (granulated steel slag) and ensure the normal and stable operation of the equipment.

[0028] According to the actual treatment condition, the number of the slag conveying machines 3 can be multiple, the multiple slag conveying machines 3 are arranged in parallel, and the transmission between the adjacent slag conveying machines 3 can be realized through the universal joint coupler.

[0029] At the same time, the top of the treatment room 1 of the embodiment is connected with a dust removal air duct 14 for dust treatment, the dust removal air duct 14 is connected with a chimney, and is sequentially provided with an induced draft fan 15 and a dust remover 16, according to the size of the treatment capacity, the dust remover 16 can also be replaced with a complete set of dust treatment equipment.

[0030] At the same time, the slag conveying machine 3 of the embodiment is provided with a chain cooling air duct 20, and is provided with an independent cooling fan, as shown in Figure 4 The top of the chain cooling air duct 20 is designed in a slope, and the air outlet is directed to the chain 8, which can not only cool the chain 8 (ensure the stable operation of the slag conveying machine 3), but also greatly prevent the granulated steel slag after the air quenching granulation treatment from falling on the chain 8.

[0031] In conclusion, the embodiment proposes a molten steel slag air quenching granulation treatment system, realizes continuous treatment operation of the molten steel slag air quenching process, greatly improves the steel slag air quenching efficiency, realizes closed treatment in the air quenching process, reduces dust pollution, can effectively collect, meets the emission standard, and automatically collects the granulated steel slag after treatment, without manual forklift transfer, reduces a large amount of manual labor intensity and cost, simultaneously, without wet treatment participation in the treatment process, not only saves a large amount of water resources, but also avoids the risk hidden danger of steam dissipation and explosion possibly existing in the wet treatment.

[0032] In the description of the utility model, unless another definite provision and limitation, the term "arrangement", "installation", "connection", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0033] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A molten steel slag air quench granulation treatment system comprising a treatment chamber (1), characterized in that, The processing room (1) is a cover type, which is provided with a slag chute (2) on the horizontal side and a slag sweeping conveyor (3) on the bottom; The slag chute (2) is communicated with the inside of the processing room (1), and is provided with an air port (4) at the lower end, one side of the air port (4) is provided with a quenching fan (5), and the quenching fan (5) is connected with the air port (4) through a quenching air duct (6); The slag sweeping conveyor (3) comprises a driving motor (7), a chain (8), a driving wheel (9) and a tension wheel (10), the driving wheel (9) and the tension wheel (10) are horizontally arranged on the bottom of the processing room (1), the chain (8) is arranged around the driving wheel (9) and the tension wheel (10) and is provided with a slag sweeping plate (11), the driving wheel (9) is drivingly connected with the driving motor (7), and the bottom of the processing room (1) is further provided with a material separating plate (12), the material separating plate (12) is located inside the chain (8) and is close to the slag sweeping plate (11) on the upper chain (8). Along the conveying direction of the slag sweeping conveyor (3), one side of the bottom of the processing room (1) is provided with a slag outlet (13).

2. A molten steel slag air quench granulation system as claimed in claim 1, wherein, The top of the processing room (1) is communicated with a dust removal air duct (14), the dust removal air duct (14) is communicated with a chimney and is sequentially provided with an induced draft fan (15) and a dust collector (16).

3. A system for melt granulation of steel slag by air quenching according to claim 1, characterized in that, The slag chute (2) is provided with a tipping platform (17) and is installed with a slag ladle (18).

4. A system for melt granulation of steel slag by air quenching according to claim 1, characterized in that, The quenching air duct (6) is arranged in an inclined upward manner.

5. A system for melt granulation of steel slag by air quenching according to claim 1, characterized in that, The slag sweeping conveyor (3) is provided with a beating wheel (19), the beating wheel (19) is in a ratchet shape and freely rotates with the chain (8).

6. A fused slag air quench granulation system as claimed in claim 1, wherein, The slag outlet (13) is communicated with a storage bin or a lower conveying device.

7. A system for melt granulation of steel slag by air quenching according to claim 1, characterized in that, The slag sweeping conveyor (3) is provided with a chain cooling air duct (20) and is provided with an independent cooling fan.

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