Device for recycling fine silicon slag powder

Abstract

The utility model provides a silicon slag fine powder recycling device, and belongs to the technical field of silicon slag treatment. The device comprises a silicon slag fine powder treatment unit and a silicon slag fine powder recycling unit, the silicon slag fine powder treatment unit comprises a crushing device, a screening device, a storage bin and a first conveying assembly, and the silicon slag fine powder recycling unit comprises a stirring device and a ladle. According to the device, unutilized silicon slag fine powder is crushed and sieved to obtain silicon slag fine powder with the silicon slag granularity smaller than 10 mm, then the silicon slag fine powder and a coating material are fully mixed and evenly stirred, and finally the mixture containing the silicon slag fine powder is used for repairing a ladle coating layer. The device not only reduces the maintenance cost of the ladle, but also improves the utilization rate of silicon slag fine powder resources, and achieves the purposes of reducing resource waste and reducing environmental pollution.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of silicon slag processing, and particularly relates to a device for recycling silicon slag fine powder. BACKGROUND

[0002] Silicon-iron alloy is an alloy of iron and silicon made from silica, carbonaceous reducing agent and iron material, which can be widely used in low alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical steel. In the smelting process of silicon-iron alloy, about 4% of metallurgical silicon slag will be produced due to the presence of impurities such as aluminum oxide, calcium oxide and magnesium oxide in the raw materials. Metallurgical silicon slag is a mixture of silicon-iron alloy and impurities, including a small amount of silicon dioxide, aluminum oxide, calcium oxide or reduced elemental calcium. In the current metallurgical industry, the treatment method of metallurgical silicon slag is to separate out silicon-iron for sale after manual crushing and screening, and the remaining slag is landfilled or stacked. This treatment method not only has high labor intensity and low efficiency, but also causes a large amount of silicon-iron with low purity to be discarded, resulting in resource waste and potential environmental pollution.

[0003] In recent years, through the research on the smelting principle of silicon-iron, the development of the smelting process and the in-depth understanding of the potential value of industrial solid waste, people have gradually found that part of the metallurgical silicon slag and micro silicon powder can be remelted to realize the recycling of resources. Among them, Chinese patent document CN108754143A discloses a method for producing silicon-iron alloy by using metallurgical silicon slag. In this scheme, the silicon slag is crushed to obtain 5-20 cm silicon slag particles, which are directly used as raw materials. The silicon slag particles are mixed with smelting furnace materials in a certain proportion and then remelted to realize the recycling of part of the resources. However, the silicon slag fine powder with a particle size of less than 5 cm generated in the crushing process cannot be effectively utilized. If the silicon slag fine powder is not recycled, it will cause resource waste, and landfill of the silicon slag fine powder will occupy a large amount of land and cause potential pollution to the soil and groundwater. How to reasonably utilize this part of silicon slag fine powder to achieve the purpose of reducing resource waste and environmental pollution is an important task for silicon-iron production enterprises and also has important significance for the ferroalloy smelting industry. CONTENT OF THE UTILITY MODEL

[0004] In view of the incomplete utilization of silicon slag fine powder and the limitations of existing recycling methods, the utility model provides a device for recycling silicon slag fine powder, which improves the resource utilization rate of silicon slag fine powder to achieve the purpose of reducing resource waste and environmental pollution.

[0005] To achieve the above purpose, the utility model provides a device for recycling silicon slag fine powder, which comprises a silicon slag fine powder treatment unit and a silicon slag fine powder recycling unit. The silicon slag fine powder treatment unit and the silicon slag fine powder recycling unit are independently arranged, and the discharge of the silicon slag fine powder treatment unit is transported into the silicon slag fine powder recycling unit.

[0006] The silicon slag fine powder processing unit comprises a crushing device, a screening device, a storage bin and a first conveying assembly, and the crushing device, the screening device and the storage bin are sequentially connected through the first conveying assembly;

[0007] The silicon slag fine powder recycling unit comprises a stirring device and a ladle, the discharge of the stirring device is placed in the ladle through carrying, and a ladle mold is placed in the ladle.

[0008] Preferably, the device further comprises a silicon slag recycling unit, and the silicon slag recycling unit comprises a second conveying assembly, a silicon slag recycling bin and a slag pool, and the screening device, the silicon slag recycling bin and the slag pool are sequentially connected through the second conveying assembly.

[0009] Preferably, the screening device is a circular vibrating screen.

[0010] Preferably, the crushing device is provided with a first feeding port and a first discharge port, the screening device is provided with a second feeding port and a second discharge port, and the storage bin is provided with a third feeding port and a third discharge port.

[0011] Preferably, the first conveying assembly comprises a first rubber belt conveyor and a second rubber belt conveyor, the feeding end of the first rubber belt conveyor is connected with the first discharge port of the crushing device, the discharge end of the first rubber belt conveyor is connected with the second feeding port of the screening device, the feeding end of the second rubber belt conveyor is connected with the second discharge port of the screening device, and the discharge end of the second rubber belt conveyor is connected with the third feeding port of the storage bin.

[0012] Preferably, the silicon slag recycling bin is provided with a fourth feeding port and a fourth discharge port, and the screening device is provided with a silicon slag recycling port.

[0013] Preferably, the second conveying assembly comprises a third rubber belt conveyor and a fourth rubber belt conveyor, the feeding end of the third rubber belt conveyor is connected with the silicon slag recycling port of the screening device, the discharge end of the third rubber belt conveyor is connected with the fourth feeding port of the silicon slag recycling bin, the feeding end of the fourth rubber belt conveyor is connected with the fourth discharge port of the silicon slag recycling bin, and the discharge end of the fourth rubber belt conveyor is connected with the slag pool.

[0014] The beneficial technical effects achieved by the utility model are as follows:

[0015] The utility model discloses a silicon slag fine powder processing unit and a silicon slag fine powder recycling unit, which recycle the silicon slag fine powder below 5cm generated by crushing the silicon slag and unable to be reused in the current, are used for repairing the coating layer of the ladle, reduce the maintenance cost of the ladle, improve the resource utilization rate of the silicon slag fine powder, and achieve the purposes of reducing resource waste and reducing environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1The device schematic diagram of the embodiment of the utility model contains the silicon residue fine powder processing unit and the recycling unit;

[0017] Figure 2 The device schematic diagram of the embodiment of the utility model contains the silicon residue fine powder processing unit and the recycling unit;

[0018] In the drawing: 1, crushing device; 2, first rubber belt machine, 3, screening device; 4, second rubber belt machine; 5, storage bin; 6, stirring device; 7, hot metal ladle, 8, third rubber belt machine; 9, silicon residue recycling bin; 10, fourth rubber belt machine; 11, residue pool; 101, first feeding port; 102, first discharging port; 301, second feeding port; 302, second discharging port; 501, third feeding port; 502, third discharging port. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] In order to better understand the purpose, structure and function of the utility model, the utility model a kind of silicon slag fine powder recycling device is further described in detail below with the drawings.

[0024] Embodiment 1

[0025] As Figure 1 shown, the embodiment provides a kind of silicon slag fine powder recycling device, the device includes silicon slag fine powder processing unit and silicon slag fine powder recycling unit, silicon slag fine powder processing unit and silicon slag fine powder recycling unit are independently arranged, the discharge of silicon slag fine powder processing unit is transported into silicon slag fine powder recycling unit;

[0026] Silicon slag fine powder processing unit includes crushing device 1, screening device 3, storage bin 5 and first conveying assembly, crushing device 1, screening device 3 and storage bin 5 are sequentially connected by first conveying assembly.

[0027] Silicon slag fine powder recycling unit includes independently arranged stirring device 6 and ladle 7, the discharge of stirring device 6 is placed into ladle 7 by handling, ladle is placed in ladle mold.

[0028] The utility model in silicon slag fine powder processing unit, unused silicon slag fine powder will be crushed, screened and treated, get the silicon slag fine powder with particle size less than 10mm, temporary storage for subsequent use;In silicon slag fine powder recycling unit, this part of silicon slag fine powder and smearing material are fully mixed and uniformly stirred, and finally the mixture containing silicon slag fine powder and smearing material is used for repairing the smearing layer of ladle. Not only reduce the maintenance cost of ladle, but also improve the resource utilization rate of silicon slag fine powder, achieve the purpose of reducing resource waste and reducing environmental pollution.

[0029] Embodiment 2

[0030] As Figure 1 shown, the embodiment provides a kind of silicon slag fine powder recycling device, the device includes silicon slag fine powder processing unit and silicon slag fine powder recycling unit, silicon slag fine powder processing unit and silicon slag fine powder recycling unit are independently arranged, the discharge of silicon slag fine powder processing unit is transported into silicon slag fine powder recycling unit;

[0031] Silicon slag fine powder processing unit includes crushing device 1, screening device 3, storage bin 5 and first conveying assembly, crushing device, screening device and storage bin are sequentially connected by first conveying assembly.

[0032] Silicon slag fine powder recycling unit includes independently arranged stirring device 6 and ladle 7, the discharge of stirring device is placed into ladle by handling, ladle is placed in ladle mold.

[0033] In this embodiment, the crushing device is provided with a first feed inlet 102 and a first discharge outlet 103. The first feed inlet is located at the top of the crushing device, and the first discharge outlet is located at the bottom of the crushing device. In this embodiment, the crushing device used can be a common and mature crusher product currently available on the market.

[0034] In this embodiment, the screening device is provided with a second inlet 301 and a second outlet 302. The second inlet is located at the top of the screening device, and the second outlet is located at the bottom of the screening device.

[0035] In this embodiment, the storage silo 5 has a third feed inlet 501 at the top and a third discharge outlet 502 at the bottom. In this embodiment, the screening device can be a circular vibrating screen. The circular vibrating screen has 10mm diameter mesh openings, which can screen out silicon slag fine powder with a particle size less than 10mm and silicon slag fine powder with a particle size greater than 10mm.

[0036] In addition, such as Figure 2 As shown, in this embodiment, the device further includes a silicon slag recovery unit, which includes a second conveying component, a silicon slag recovery bin 9, and a slag pool 11. The screening device 3, the silicon slag recovery bin, and the slag pool are connected in sequence through the second conveying component.

[0037] In this embodiment, the top of the silicon slag recycling bin is provided with a fourth inlet, and the bottom of the recycling bin is provided with a fourth outlet. The structure is the same as that of the storage bin, and the screening device is provided with a silicon slag recycling port.

[0038] In this embodiment, the second conveying assembly includes a third conveyor belt 8 and a fourth conveyor belt 10. The feed end of the third conveyor belt is connected to the silicon slag recovery port of the screening device, the discharge end of the third conveyor belt is connected to the fourth feed port of the silicon slag recovery bin, the feed end of the fourth conveyor belt is connected to the fourth discharge port of the silicon slag recovery bin, and the discharge end of the fourth conveyor belt is connected to the slag pool.

[0039] In the silicon slag recycling unit, silicon slag fines larger than 10mm are transported to the silicon slag recycling bin via a third conveyor belt, and then to the slag pool for temporary storage via a fourth conveyor belt. The silicon slag fines in the slag pool are then fed back to the crushing device for secondary crushing, and this recycling process continues until all silicon slag fines are crushed to below 10mm. Through the processing of the silicon slag recycling unit, all silicon slag fines smaller than 5cm can be crushed and utilized, maximizing the utilization of silicon slag fines resources.

[0040] The specific process for recycling fine silicon slag powder using this device is as follows:

[0041] In the silicon slag fine powder processing unit, the unused silicon slag fine powder is conveyed to the first feeding port 101 of the crushing device 1 through the feeding operation, and after the silicon slag fine powder enters the interior of the crushing device 1, the crushing device 1 repeatedly performs crushing treatment on the silicon slag fine powder until the silicon slag fine powder is crushed to the required particle size; the silicon slag fine powder after the crushing treatment is discharged from the first discharge port 102 and conveyed to the second feeding port 301 of the screening device 3 through the first rubber belt conveyor 2, and the screening device 3 performs screening treatment on the silicon slag fine powder to separate the silicon slag fine powder with a particle size less than 10 mm and the silicon slag fine powder with a particle size greater than 10 mm, and the silicon slag fine powder with a particle size less than 10 mm is directly conveyed to the storage bin 5 through the second rubber belt conveyor 4 from the second discharge port 302, and after the silicon slag fine powder with a particle size less than 10 mm is temporarily stored, it will be utilized in the silicon slag fine powder recycling unit later.

[0042] At the same time, in the silicon slag recycling unit, the silicon slag fine powder with a particle size greater than 10 mm screened out is conveyed to the silicon slag recycling bin 9 through the third rubber belt conveyor 8 from the silicon slag recycling port of the screening device 3, and then the part of the silicon slag fine powder is transferred from the silicon slag recycling bin 9 to the slag pool 11 through the fourth rubber belt conveyor 10 for storage, and the part of the silicon slag fine powder with a particle size greater than 10 mm in the slag pool is conveyed to the crushing device 1 again for secondary crushing, and the cycle is repeated until the silicon slag fine powder is completely crushed to less than 10 mm.

[0043] In the silicon slag fine powder recycling unit, the silicon slag fine powder with a particle size less than 10 mm in the storage bin is transferred to the stirring device 6, and at the same time, the coating material and water are added to the stirring device, so that the coating material, the silicon slag fine powder and the water are mixed in a ratio of 1:0.25:0.1, and then fully and uniformly stirred in the stirring device 6, and then the mixture of the silicon slag fine powder and the coating material is put into the gap area between the permanent layer inner wall of the hot metal ladle 7 and the outer wall of the ladle building mold, and the mixture can be tamped and rammed by using a pneumatic pick or an electric pick, and the tamping thickness is generally 10 cm, and after the tamping is completed, the ladle building mold is removed and then baked, and after complete drying, the hot metal ladle coating layer is repaired.

[0044] The mixture containing the silicon slag fine powder has good adhesion to the permanent layer of the hot metal ladle, and has the advantages of heat resistance stability, good heat preservation effect, long service life and the like. The device recycles the silicon slag fine powder with a size of less than 5 cm generated by crushing the silicon slag and unable to be utilized in the furnace, and uses it for repairing the coating layer of the hot metal ladle, which not only reduces the maintenance cost of the hot metal ladle, but also improves the resource utilization rate of the silicon slag fine powder, so as to reduce resource waste and environmental pollution.

[0045] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for recycling fine silicon slag powder, characterized in that, The silicon slag fine powder treatment unit and the silicon slag fine powder recycling unit are independently arranged, the discharge of the silicon slag fine powder treatment unit enters the silicon slag fine powder recycling unit through transportation; The silicon slag fine powder treatment unit comprises a crushing device, a screening device, a storage bin and a first conveying assembly, and the crushing device, the screening device and the storage bin are sequentially connected through the first conveying assembly. The silicon slag fine powder recycling unit comprises an independently arranged stirring device and a ladle, the discharge of the stirring device is placed in the ladle through carrying, and a ladle mold is placed in the ladle.

2. The device for recycling fine silicon slag powder according to claim 1, characterized in that, The silicon slag recycling unit comprises a second conveying assembly, a silicon slag recycling bin and a slag pool, and the screening device, the silicon slag recycling bin and the slag pool are sequentially connected through the second conveying assembly.

3. The device for recycling fine silicon slag powder according to claim 1, characterized in that, The screening device is a circular vibrating screen.

4. The device for recycling fine silicon slag powder according to claim 1, characterized in that, The crushing device is provided with a first feeding port and a first discharge port, the screening device is provided with a second feeding port and a second discharge port, and the storage bin is provided with a third feeding port and a third discharge port.

5. The device for recycling fine silicon slag powder according to claim 4, characterized in that, The first conveying assembly comprises a first rubber belt conveyor and a second rubber belt conveyor, the feeding end of the first rubber belt conveyor is connected with the first discharge port of the crushing device, the discharge end of the first rubber belt conveyor is connected with the second feeding port of the screening device, the feeding end of the second rubber belt conveyor is connected with the second discharge port of the screening device, and the discharge end of the second rubber belt conveyor is connected with the third feeding port of the storage bin.

6. The device for recycling fine silicon slag powder according to claim 2, characterized in that, The silicon slag recycling bin is provided with a fourth feeding port and a fourth discharge port, and the screening device is provided with a silicon slag recycling port.

7. The device for recycling fine silicon slag powder according to claim 6, characterized in that, The second conveying assembly comprises a third rubber belt conveyor and a fourth rubber belt conveyor, the feeding end of the third rubber belt conveyor is connected with the silicon slag recycling port of the screening device, the discharge end of the third rubber belt conveyor is connected with the fourth feeding port of the silicon slag recycling bin, the feeding end of the fourth rubber belt conveyor is connected with the fourth discharge port of the silicon slag recycling bin, and the discharge end of the fourth rubber belt conveyor is connected with the slag pool.

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