A feeding device for uniformly adding coarse arsenic

Abstract

The application discloses a uniform feeding equipment for coarse arsenic, relates to the technical field of arsenic trioxide feeding devices, and comprises a shell in a back shape, wherein the two ends of the shell are in arc shapes, the back-shaped shell extends into a silicon carbide hearth and is in non-contact with the inner wall of the hearth, a conveying device is arranged in the shell, the conveying device comprises two conveying wheels and a conveying belt, the two conveying wheels are arranged at the two ends of the shell, the conveying belt is sleeved on the two conveying wheels, a spacing is formed between the conveying belt and the shell, and a pushing block for pushing coarse arsenic materials to move is arranged on the conveying belt; the upper end of the shell is provided with a feeding port, and the lower end of the shell is provided with a discharging port. The application solves the problems of non-uniform feeding of a traditional hopper and scratching of the silicon carbide hearth, and after the application is used, not only is uniform feeding realized, but also the scratching of the hearth is effectively reduced, and very positive practical effects are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of arsenic trioxide feeding device, and particularly relates to a uniform coarse arsenic feeding equipment. BACKGROUND

[0002] At present, the coarse arsenic is fed into the silicon carbide hearth through a hopper, and the coarse arsenic slides to the silicon carbide hearth through the hopper. The coarse arsenic is inevitably scratched in the sliding process, and the one-time feeding amount through the hopper is large, the reaction in the furnace is not sufficient, the residual coarse arsenic is not completely reacted, and blackened arsenic trioxide is produced, thereby causing the waste of the material. SUMMARY

[0003] In order to solve the problem that the coarse arsenic is scratched in the sliding process, the application provides a uniform coarse arsenic feeding equipment, which directly feeds the coarse arsenic into the furnace bottom, effectively reduces the scratching of the furnace, and can quantitatively and repeatedly feed the coarse arsenic, so that the reaction is more sufficient.

[0004] The technical scheme provided by the application is as follows: a uniform coarse arsenic feeding equipment, which comprises a silicon carbide hearth and a shell in a back type. The two ends of the back type shell are in a circular arc shape. The back type shell extends into the silicon carbide hearth and is in contact with the inner wall of the hearth. A conveying device is arranged in the shell. The conveying device comprises two conveying wheels and a conveying belt. The two conveying wheels are arranged at the two ends of the shell. The conveying belt is sleeved on the two conveying wheels. There is a space between the conveying belt and the shell. The space is used for transporting materials. A pushing block for moving the coarse arsenic material from top to bottom is arranged on the conveying belt. The upper end of the shell is provided with a feeding port, and the lower end of the shell is provided with a discharging port. In the conveying process of the conveying belt, the coarse arsenic material enters between the two pushing blocks of the conveying belt through the feeding port. After the coarse arsenic material reaches the discharging port, it is adjusted into the silicon carbide hearth under the action of gravity.

[0005] As a further technical scheme, the pushing block is in a triangular structure. One base of the triangle is the conveying belt body. The other two bases of the triangle are a plate and an extension rod. One end of the plate is hinged to the conveying belt, and one end of the extension rod is also hinged to the conveying belt. The other end of the extension rod extends into the middle of the plate. The end of the extension rod extending into the plate is hinged to a plug rod. A plug hole is formed in the plate. The plug rod is inserted into the plug hole. A spring is arranged in the plug hole.

[0006] The application has the following beneficial effects:

[0007] 1. Compared with the prior art of adding coarse arsenic into a silicon carbide furnace through a hopper, the present application designs a shell extending into the silicon carbide furnace, a conveying device is arranged in the shell, and a spacing between the conveying belt of the conveying device and the shell is used for conveying coarse arsenic material. The pushing blocks on the conveying belt are uniformly spaced, so the amount of coarse arsenic between two pushing blocks is also uniform. In addition, the conveying belt rotates at a uniform speed, thereby realizing uniform feeding and completely solving the problem of non-uniform feeding of the hopper in the prior art.

[0008] 2. The shell of the present application can extend into the silicon carbide furnace, is closer to the bottom of the silicon carbide furnace, and has a shorter sliding distance of feeding, so the damage to the silicon carbide furnace can be effectively reduced during the feeding process, which is more conducive to protecting the silicon carbide furnace. In addition, a lifting device is arranged above the shell, which can lift the height of the shell while feeding, so that the distance of the coarse arsenic sliding to the furnace is always consistent, which plays a positive role in avoiding damage to the furnace.

[0009] 3. The design of the triangular pushing block enables the plate to rotate at a certain angle, so that the pushing area is maximized during the pushing process, and more material can be pushed. Since one of the bases of the triangle is the conveying belt body, the base becomes arc-shaped when passing through the conveying wheel, and the straight line length is reduced. In order to adapt to this change, the top angle and the length of the side of the triangle can be changed, so that the tightness of the conveying belt is not affected by the installation of the pushing block. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic diagram of the overall structure of the present application.

[0011] Figure 2 is a schematic diagram of the structure of the pushing block in the present application.

[0012] In the figure: 1, winding drum; 2, winding rope; 3, hopper; 4, shell; 5, silicon carbide furnace; 6, pushing block; 7, conveying wheel; 8, conveying belt; 9, discharge port; 601, plate; 602, telescopic rod; 603, insertion rod; 604, spring. DETAILED DESCRIPTION

[0013] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0014] As shown in Figure 1 , the present embodiment includes a silicon carbide furnace 5 and a shell 4 in the shape of a loop. The two ends of the loop-shaped shell 4 are both circular arcs. The lower end of the loop-shaped shell 4 extends into the silicon carbide furnace 5 and does not contact the inner wall of the furnace, thereby avoiding scratching the silicon carbide furnace 5.

[0015] The housing 4 is equipped with a conveying device, which includes two conveying wheels 7 and a conveyor belt 8. The two conveying wheels 7 are located at both ends of the housing 4 and can rotate relative to the housing 4. The conveyor belt 8 is fitted on the two conveying wheels 7 and rotates with the rotation of the conveying wheels 7. There is a gap between the conveyor belt 8 and the housing 4. The gap is used to transport materials. The conveyor belt 8 is equipped with pusher blocks 6 that push the crude arsenic material from top to bottom. The pusher blocks 6 are evenly distributed, which is conducive to achieving uniform feeding of crude arsenic.

[0016] The upper end of the shell 4 has a feed inlet, and the lower end of the shell 4 has a discharge outlet 9. During the conveying process of the conveyor belt 8, the crude arsenic material enters between the two pusher blocks 6 of the conveyor belt 8 through the feed inlet. After the crude arsenic material reaches the discharge outlet 9, it is adjusted into the silicon carbide furnace 5 under the action of gravity. Since the spacing between the pusher blocks 6 is uniform, the amount of crude arsenic material stored is basically the same. In addition, the conveyor belt 8 rotates at a uniform speed, thus realizing the uniform feeding of crude arsenic and completely solving the problem that the funnel 3 cannot feed evenly in the existing technology.

[0017] In this embodiment, the shell 4 can extend into the silicon carbide furnace chamber 5, getting closer to the bottom of the silicon carbide. This results in a shorter distance for the crude arsenic to slide down during the feeding process, effectively reducing scratches on the silicon carbide furnace chamber 5 and better protecting it. Furthermore, a lifting device is installed above the shell 4, which can raise the height of the shell 4 while feeding, ensuring that the distance the crude arsenic slides into the furnace chamber remains consistent throughout the feeding process, thus playing a positive role in preventing scratches on the furnace chamber.

[0018] like Figure 2 As shown, the pusher block 6 in this embodiment has a triangular structure, with one base of the triangle being the conveyor belt 8 body. This saves one base and allows the base to become arc-shaped when passing the conveyor wheel 7, completely fitting the conveyor wheel 7 and preventing the belt pulley from vibrating. After the base becomes arc-shaped, the straight length decreases. To adapt to this change, the other two bases of the triangle are a plate 601 and a telescopic rod 602. One end of the plate 601 is hinged to the conveyor belt 8, and one end of the telescopic rod 602 is also hinged to the conveyor belt 8. The middle of the plate 601 is slotted, and the other end of the telescopic rod 602 extends into the slot in the middle of the plate 601. An insert rod 603 is hinged to the end of the telescopic rod 602 that extends into the plate 601. An insertion hole is provided in the plate 601, and the insert rod 603 is inserted into the insertion hole. A spring 604 is provided in the insertion hole. As can be seen from the above structure, the apex angle and side length of the triangle in this embodiment are variable. Therefore, the tension of the conveyor belt 8 is not affected by the installation of the pusher block 6, and the conveyor belt 8 will not vibrate due to changes in tension. Therefore, the conveying stability is higher.

[0019] The end of the telescopic rod 602, which extends into the plate 601, is also equipped with a pulley. The pulley slides in cooperation with the plate 601, thereby reducing friction.

[0020] The hopper 3 is arranged at the feeding port of the shell 4 and communicates with the feeding port. The coarse arsenic material is added into the hopper 3. The pushing block 6 pushes the coarse arsenic material from top to bottom under the gravity and the conveying effect of the conveying belt 8. The coarse arsenic material exists between two pushing blocks 6. Since the bottom of the pushing block 6 as the plate 601 bears large resistance during the pushing of the material, the bottom is upwardly rotated, and the bottom as the telescopic rod 602 is elongated at this time. Thus, the area of the pushing surface of the pushing block 6 is increased, which is more beneficial to push more coarse arsenic material.

[0021] The lifting device for lifting the height of the shell 4 is arranged above the shell 4. The present application does not limit the specific structure of the lifting device. The lifting device can be hydraulic type, and the liquid is the winding drum 1 and the winding rope 2, as long as the lifting function of the shell 4 can be met.

[0022] The shell 4 is lowered to a position far from the hearth at the initial stage of feeding, so that the distance of the coarse arsenic material sliding from the shell 4 to the silicon carbide hearth 5 is minimized, thereby minimizing the scratch on the hearth. With the slow feeding of the coarse arsenic material, the shell 4 is slowly lifted to the distance from the hearth bottom, and the sliding distance of the coarse arsenic material is kept consistent, which positively avoids the scratch on the hearth.

Claims

1. A dosing installation for the uniform addition of coarse arsenic, comprising a silicon carbide hearth (5), characterized in that: The shell (4) is a back type, which extends into the silicon carbide furnace (5) and is not in contact with the inner wall of the furnace, a conveying device is arranged in the shell (4), the conveying device comprises two conveying wheels (7) and a conveying belt (8), the two conveying wheels (7) are arranged at two ends of the shell (4), the conveying belt (8) is sleeved on the two conveying wheels (7), there is a space between the conveying belt (8) and the shell (4), the conveying belt (8) is provided with a pushing block (6) for pushing the coarse arsenic material to move, the upper end of the shell (4) is provided with a feeding port, and the lower end of the shell (4) is provided with a discharging port (9); The pushing block (6) is in a triangular structure, one base of the triangle is the conveying belt (8) body, so that one base is saved, and the base can be changed into an arc shape when passing through the conveying wheel (7) and completely adheres to the conveying wheel (7), so that the belt pulley is prevented from being loose and vibrating; the other two bases of the triangle are a plate (601) and an extension rod (602); one end of the plate (601) is hinged to the conveying belt (8), one end of the extension rod (602) is also hinged to the conveying belt (8), the other end of the extension rod (602) extends into the middle of the plate (601), the end of the extension rod (602) extending into the plate (601) is hinged to a plug rod (603), the plate (601) is provided with a plug hole, the plug rod (603) is inserted into the plug hole, and the plug hole is provided with a spring (604).

2. The uniform addition of coarse arsenic feeding equipment according to claim 1, characterized in that: The end of the extension rod (602) extending into the plate (601) is also provided with a pulley, and the pulley is in sliding fit with the plate (601).

3. The uniform addition of coarse arsenic feeding equipment according to claim 1, characterized in that: The feeding port of the shell (4) is provided with a hopper (3), and the hopper (3) is in communication with the feeding port.

4. The uniform addition of coarse arsenic feeding equipment according to claim 1, characterized in that: The upper portion of the shell (4) is provided with a lifting device for lifting the height of the shell (4).

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