An industrial silicon refining device
By installing breathable bricks and venting joints at the bottom of the silicon cask body, combined with a specific angle of pipe layout and joint design, the problem of pipe burn-out caused by silicon liquid leakage was solved, improving the safety and stability of industrial silicon production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA TONGWEI GREEN SUBSTRATE CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-09
Smart Images
Figure CN224337658U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial silicon production technology, specifically to an industrial silicon refining apparatus. Background Technology
[0002] In the industrial silicon production process, raw materials are heated in a submerged arc furnace by passing electricity through graphite electrodes. Silica and a reducing agent undergo a reduction chemical reaction at high temperatures, reducing silicon dioxide in the silica to industrial silicon liquid. The smelted silicon liquid then needs to be transferred to a ladle for external refining. A gas mixture of oxygen and compressed air (air-oxygen mixture) is introduced, causing impurities such as aluminum and calcium in the silicon liquid to combine with oxygen to form oxides, thereby removing the impurities.
[0003] Liquid silicon typically flows from the bore of a submerged arc furnace into a ladle placed on a wagon. A winch pulls the wagon, moving the ladle along a ground track until it enters the refining hood for external refining. The air-oxygen mixture used for refining is usually connected to a blowing metal pipe on the back of the ladle via a flexible hose, and the refining process is achieved through permeable bricks at the bottom of the ladle. However, in actual industrial silicon production, factors such as oxidation from prolonged use of the bore, operator inexperience, and high furnace pressure can cause difficulties in sealing the bore. This necessitates continuous unloading operations (continuous ladle pulling) without clogging the bore. During this process, liquid silicon inevitably leaks between two ladles. When this happens, the high-temperature liquid silicon burns the oxygen-enriched pipes and hoses on the back of the ladle, causing the leaking air-oxygen mixture to fuel combustion, seriously endangering the safety of on-site personnel. Furthermore, the gas supply must be shut off to stop the refining of the liquid silicon in the ladle, resulting in a decline in the overall quality of the ladle and preventing the long-term stable operation of the industrial silicon submerged arc furnace. Utility Model Content
[0004] This invention addresses the problem in existing industrial silicon submerged arc furnaces where, during continuous unblocked furnace operation, high-temperature molten silicon leaks and burns the oxygen-enriched pipes and hoses on the back of the silicon ladle, causing air-oxygen mixture leakage and combustion, seriously endangering the safety of on-site personnel, degrading the quality of the molten silicon, and affecting the long-term stable operation of the industrial silicon submerged arc furnace. The invention provides an industrial silicon refining device that avoids the pipes connected to the silicon ladle being burned by leaking high-temperature molten silicon, reducing safety risks and improving production stability.
[0005] The technical solution adopted in this utility model is:
[0006] An industrial silicon refining apparatus, comprising:
[0007] The silicon-encased body has a breathable brick at its bottom; and a capping nozzle is provided on one side of the sidewall of the silicon-encased body.
[0008] The refining unit has at least one ventilator connected to the permeable brick, and the ventilator is connected to a first ventilator pipe.
[0009] The first ventilation pipe is provided with a second interface for connecting to an external blowing gas inlet pipe; the second interface is located outside the side wall of the silicon bag body, and the angle θ between the line connecting the second interface and the central axis of the silicon bag body and the line connecting the nozzle and the central axis of the silicon bag body is in the range of 130°~150°.
[0010] Furthermore, an ear plate is provided on the side wall of the silicon packaging body, on the side opposite to the line connecting the packaging nozzle and the central axis of the silicon packaging body, and the ear plate has at least two parallel perforated plates.
[0011] Furthermore, lifting lugs are provided on the sidewalls of the silicon packaging body, on both sides perpendicular to the line connecting the packaging nozzle and the central axis of the silicon packaging body.
[0012] Furthermore, the first ventilation duct has at least a first pipe section, a second pipe section, and a third pipe section connected in sequence; the first pipe section is provided with a first interface communicating with the ventilation connector; and the third pipe section is provided with a second interface.
[0013] Furthermore, the first pipe segment is disposed below the silicon package body; and the first pipe segment is disposed parallel to the bottom wall of the silicon package body, extending from the middle of the bottom wall of the silicon package body towards the edge.
[0014] Furthermore, the bottom of the silicon cladding body is provided with an installation groove, which is adapted to the first pipe segment, and the first pipe segment passes through the installation groove.
[0015] Furthermore, the second pipe segment is disposed on the outer side of the sidewall of the silicon cladding body; and the second pipe segment is disposed parallel to the sidewall of the silicon cladding body, extending upward from the bottom of the sidewall of the silicon cladding body.
[0016] Furthermore, the third pipe segment extends from a position near the sidewall of the silicon cladding body to the outside of the sidewall of the silicon cladding body.
[0017] Furthermore, the vent connector is a three-dimensional three-way connector assembly, and the other end of the vent connector is connected to a second vent pipe; a fourth interface is provided on the second vent pipe, and the angle between the line connecting the fourth interface and the central axis of the silicon package body and the line connecting the nozzle and the central axis of the silicon package body is in the range of 130°~150°, and the second vent pipe is located on the silicon package body on a different side from the first vent pipe; both the fourth interface and the second interface are provided with check valves.
[0018] The beneficial effects of this utility model are:
[0019] 1. This utility model achieves external gas refining of molten silicon by setting up a silicon ladle body and a blowing mechanism. The air inlet of the blowing mechanism is located at the bottom of the silicon ladle body, and the first air inlet of the blowing mechanism extends from the bottom of the silicon ladle body to the outside of the side wall of the silicon ladle body. At the same time, the angle θ between the line connecting the second interface and the central axis of the silicon ladle body and the line connecting the nozzle and the central axis of the silicon ladle body is set in the range of 130°~150°. This allows the first air inlet and its connected air inlet hose to avoid areas where molten silicon may leak and splash between silicon ladles during the movement of the silicon ladle, reducing the risk of gas leakage and improving the safety of pipe replacement operations. This solves the problem in the prior art where, during continuous unblocked furnace operation of industrial silicon submerged arc furnaces, high-temperature molten silicon leakage burns the oxygen-enriched pipes and hoses on the back of the silicon ladle, causing leakage of air-oxygen mixture and combustion, seriously endangering the safety of on-site personnel, and causing a decline in the quality of molten silicon, affecting the long-term stable operation of industrial silicon submerged arc furnaces. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a three-dimensional schematic diagram of the silicon package according to an embodiment of the present utility model;
[0022] Figure 2 This is a front view of the silicon package according to an embodiment of the present invention;
[0023] Figure 3 This is a side sectional view of the silicon package according to an embodiment of the present invention;
[0024] Figure 4 This is a bottom view of the silicon package according to an embodiment of the present invention;
[0025] Figure 5 This utility model Figure 4 Enlarged view of point A;
[0026] Figure 6 This is a schematic diagram of the working position of the silicon package according to an embodiment of the present invention.
[0027] Attached reference numerals: 100-Silicone casing body, 110-Breathable brick, 120-Casing nozzle, 130-Ear plate, 140-Lifting lug, 150-Mounting groove;
[0028] 200-blowing mechanism, 210-ventilation connector, 220-first ventilation pipe, 221-first interface, 222-second interface, 223-first pipe section, 224-second pipe section, 225-third pipe section, 230-second ventilation pipe, 232-fourth interface, 250-check valve.
[0029] 300-Silicon car track;
[0030] 400 - Discharge port of the electric arc furnace. Detailed Implementation
[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0032] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.
[0033] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.
[0034] Example 1
[0035] In most existing industrial silicon enterprises, the refining metal pipes of the silicon ladle are located directly behind the silicon ladle. This arrangement has the following problems: 1. During furnace tapping, because the metal pipe is directly behind the silicon ladle, the connection between the hose and the metal pipe is close to the splash range of molten silicon. The splashing molten silicon and sparks from inside the silicon ladle can easily fall onto the hose, causing it to burn and potentially leading to leakage and fire of the air-oxygen mixture, increasing the safety risk; 2. During furnace tapping, two silicon ladles are usually prepared and connected in the same direction by a lower ladle carriage. In case of abnormalities such as hose burn-out by high-temperature molten silicon, to ensure that the molten silicon does not cool inside the silicon ladle, operators need to replace the hose between the two ladles, increasing the risk of mechanical injury to operators; 3. When the furnace is aging and the furnace opening is difficult to seal, continuous tapping is required to connect the ladles. As the ladle carriage moves, the furnace opening will be briefly positioned between the two silicon ladles. The high-temperature molten silicon flowing out of the furnace opening will be directly facing the metal pipe of the silicon ladle, burning the hose and metal pipe on the back of the silicon ladle, which cannot guarantee the normal operation of the equipment.
[0036] To address the aforementioned problems in the prior art, this embodiment provides an industrial silicon refining apparatus. This apparatus is used for an external blowing refining process of molten silicon produced from an industrial silicon submerged arc furnace. An air-oxygen mixture is introduced, causing impurities such as aluminum and calcium in the molten silicon to combine with oxygen to form oxides, thereby removing the impurities. This industrial silicon refining apparatus can prevent the metal pipes, oxygen-enriched pipes, and flexible hoses connected to the silicon ladle from being burned by leaked high-temperature molten silicon, reducing safety risks and improving production stability. Please refer to [link to previous document]. Figures 1-6 The industrial silicon refining unit mainly includes: silicon cladding body 100 and blowing mechanism 200, etc.
[0037] The silicon ladle body 100 is placed on a silicon ladle cart for use. As the silicon ladle cart moves, the silicon ladle body 100 can move to the bottom of the furnace hole of the submerged arc furnace to receive the molten silicon produced inside the furnace; on the other hand, it can move to the bottom of the refining hood for external refining. For example... Figure 1 , Figure 2 As shown, the silicon bag body 100 is roughly frustum-shaped, hollow inside for storing molten silicon, and has an opening at the top for injecting molten silicon. Several permeable bricks 110 are installed inside the bottom wall of the silicon bag body 100 for the blowing mechanism 200 to introduce an air-oxygen mixture into the silicon bag body. Furthermore, a spout 120 is provided on one side of the side wall of the silicon bag body 100, and the spout 120 has a pouring port for pouring out the molten silicon inside the silicon bag body 100 after refining. Figure 6As shown, in order to facilitate the injection of the molten silicon produced in the submerged arc furnace and the pouring out of the refined molten silicon, when the silicon bale body 100 is placed on the silicon bale cart, the orientation of the bale nozzle 120 (i.e., the direction of the line connecting the bale nozzle and the central axis of the silicon bale body 100) needs to be parallel to the direction of the silicon bale cart track 300; while the direction of the submerged arc furnace aperture discharge port 400 (i.e., the direction of the line connecting the submerged arc furnace aperture discharge port 400 and the central axis of the silicon bale body 100) is perpendicular to the direction of the silicon bale cart track 300.
[0038] The blowing mechanism 200 is used to introduce an air-oxygen mixture into the molten silicon within the silicon cask body 100, causing impurities such as aluminum and calcium in the molten silicon to combine with oxygen to form oxides, thereby removing the impurities. The blowing mechanism 200 mainly includes a venting connector 210 and a first venting pipe 220. The venting connector 210 is located on the outer side of the bottom center of the silicon cask body 100 and is connected to the permeable brick 110 at the bottom of the silicon cask body 100 for introducing the air-oxygen mixture. The first venting pipe 220 extends from the center below the bottom of the silicon cask body 100 to the outside of the side wall of the silicon cask body 100. The first venting pipe 220 is mainly divided into a first pipe section 223, a second pipe section 224, and a third pipe section 225 connected sequentially. The first pipe segment 223 is located below the silicon casing body 100, parallel to the bottom wall of the silicon casing body 100, and extends from the middle of the bottom wall of the silicon casing body 100 towards the edge. One end of the first pipe segment 223 is the first interface 221 of the entire first vent pipe 220, and the first interface 221 is connected to the vent connector 210. The other end of the first pipe segment 223 is connected to the second pipe segment 224. The second pipe segment 224 is located on the outside of the side wall of the silicon casing body 100, parallel to the side wall of the silicon casing body 100, and extends upward from the bottom of the side wall of the silicon casing body 100. The other end of the second pipe segment 224 is connected to the third pipe segment 225. The third pipe section 225 extends from the side wall near the silicon bladder body 100 to the outside of the side wall of the silicon bladder body 100. The other end of the third pipe section 225 is provided with the second interface 222 of the entire first ventilation pipe 220. The second interface 222 is connected to the external air inlet hose. The angle θ between the line connecting the second interface 222 and the central axis of the silicon bladder body 100 and the line connecting the nozzle 120 and the central axis of the silicon bladder body 100 is in the range of 130°~150°. This can avoid the leakage of silicon liquid between different silicon bladders during continuous furnace tapping operation and make the pipe replacement operation safer.
[0039] One specific working method of this embodiment is as follows:
[0040] Several industrial silicon refining devices according to this embodiment are placed on a silicon ladle cart. Then, the silicon ladle body 100 is aligned with the lower part of the furnace hole discharge port 400 of the submerged arc furnace to start discharging molten silicon. After the silicon ladle body 100 is full of molten silicon, a continuous discharge operation without clogging the hole is adopted. The silicon ladle cart runs along the silicon ladle cart track 300 to move the next silicon ladle to the lower part of the furnace hole discharge port 400 of the submerged arc furnace. Then, the previous silicon ladle moves into the refining fume hood to start ladle refining. During the movement, due to the position of the second interface 222, the first ventilation pipe 220 and the air inlet hose connected to it avoid the area where molten silicon may leak and splash between silicon ladles. When it is necessary to replace the air inlet hose, the operator can work from the side of the silicon ladle cart track 300 away from the furnace hole discharge port 400 of the submerged arc furnace, which reduces the safety risk of the pipe replacement operation.
[0041] In this embodiment, the industrial silicon refining apparatus performs furnace-side air refining of molten silicon by setting up a silicon ladle body 100 and a blowing mechanism 200. The air inlet 210 of the blowing mechanism 200 is located at the bottom of the silicon ladle body 100. The first air inlet duct 220 of the blowing mechanism 200 extends from the bottom of the silicon ladle body 100 to the outside of the side wall of the silicon ladle body 100. Simultaneously, the angle θ between the line connecting the second interface 222 and the central axis of the silicon ladle body 100 and the line connecting the nozzle 120 and the central axis of the silicon ladle body 100 is within the range of 130° to 150°. The positioning within the enclosure ensures that the first vent pipe 220 and its connected air inlet hose can avoid areas where molten silicon may leak and splash between silicon ladles during silicon ladle movement. This reduces the risk of gas leakage and improves the safety of pipe replacement operations. It solves the problem in existing technologies where, during continuous unblocked furnace operation of industrial silicon submerged arc furnaces, high-temperature molten silicon leakage burns the oxygen-enriched pipes and hoses on the back of the silicon ladle, causing leakage of air-oxygen mixture and combustion, seriously endangering the safety of on-site personnel, and causing a decline in the quality of molten silicon, affecting the long-term stable operation of industrial silicon submerged arc furnaces.
[0042] Furthermore, in this embodiment, an ear plate 130 is provided on the side wall of the silicon ladle body 100, on the side opposite to the ladle nozzle 120. The ear plate 130 includes two parallel perforated plates, mainly serving a supporting and connecting function. It can connect to a hydraulic tilting device. When the silicon liquid needs to be poured out after refining, the hydraulic tilting device can adjust the tilt angle of the silicon ladle body 100 by controlling the ear plate 130 to facilitate the pouring out of the silicon liquid. In addition, lifting lugs 140 are provided on both sides of the side wall of the silicon ladle body 100, perpendicular to the ladle nozzle 120. The lifting lugs 140 are used to connect to cranes or other lifting equipment to facilitate the movement of the silicon ladle between different workstations, such as transferring the silicon ladle from the refining workstation on the silicon ladle cart to the casting workstation. The lifting lugs 140 also help maintain the stability of the silicon ladle during lifting and transportation, preventing the silicon ladle from tilting or shaking, ensuring that the molten silicon liquid inside the silicon ladle remains in a stable state, and avoiding spillage of silicon liquid or danger to equipment and personnel due to shaking. Meanwhile, an installation groove 150 is provided at the bottom of the silicon bag body 100. The shape and direction of the installation groove 150 are adapted to the first pipe section 223 of the first ventilation pipe 220 of the blowing mechanism 200. The installation groove 150 can accommodate the first pipe section 223 and insert the first pipe section 223 inside it, providing space for the first pipe section 223. This avoids the first pipe section 223 below the silicon bag body 100 being flattened and damaged when the silicon bag body 100 is placed on the ground, and also avoids the first pipe section 223 below the silicon bag body 100 affecting the stability of the silicon bag body 100 when placed on the silicon bag cart.
[0043] Furthermore, in the blowing mechanism 200 of this embodiment, the vent connector 210 is a three-dimensional three-way connector assembly; and the other end of the vent connector 210 is also connected to a second vent pipe 230. The second vent pipe 230 has a shape and structure that is roughly the same as the first vent pipe 220, and is symmetrically arranged on the other side of the silicon cassette body 100. The second vent pipe 230 is also provided with a fourth interface 232 that connects to the external air inlet hose, and the angle between the line connecting the fourth interface 232 and the central axis of the silicon cassette body 100 and the line connecting the nozzle 120 and the central axis of the silicon cassette body 100 is also in the range of 130°~150°. In addition, in this embodiment, a check valve 250 is installed on both the fourth interface 232 and the second interface 222. The check valve 250 has components such as a valve body, valve disc, seal, and connector, which can prevent gas backflow and ensure that the gas can only flow in one direction. By simultaneously installing the first ventilation pipe 220 and the second ventilation pipe 230, it is ensured that regardless of whether the nozzle 120 of the silicon ladle body 100 is placed facing the front or rear of the silicon ladle cart track 300, operators can connect the air inlet hose and ventilation pipe from the outside of the silicon ladle cart track 300, away from the submerged arc furnace. This avoids working on the inside of the silicon ladle cart track 300, which is close to the submerged arc furnace, thus reducing operational hazards. The check valve 250 prevents air leakage from the second ventilation pipe 230 when air is supplied to the first ventilation pipe 220, or from the first ventilation pipe 220 when air is supplied to the second ventilation pipe 230.
[0044] Preferably, in this embodiment, both the first ventilation pipe 220 and the second ventilation pipe 230 are made of metal materials to ensure durability and positional stability of the second interface 222 and the fourth interface 232, thus avoiding changes in the included angle θ and affecting the use of the silicon package.
[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An industrial silicon refining apparatus, characterized in that, Include: The silicon-clad body (100) has a breathable brick (110) at its bottom; and a cladding nozzle (120) is provided on one side of the sidewall of the silicon-clad body (100). The refining unit (200) has at least one vent joint (210) connected to the permeable brick (110), and the vent joint (210) is connected to a first vent pipe (220). The first ventilation pipe (220) is provided with a second interface (222) for connecting to an external blowing gas inlet pipe; the second interface (222) is located outside the side wall of the silicon package body (100), and the angle θ between the line connecting the second interface (222) and the central axis of the silicon package body (100) and the line connecting the nozzle (120) and the central axis of the silicon package body (100) is in the range of 130°~150°.
2. The industrial silicon refining apparatus as described in claim 1, characterized in that, An ear plate (130) is provided on the side wall of the silicon packaging body (100) and on the side opposite to the line connecting the packaging nozzle (120) and the central axis of the silicon packaging body (100). The ear plate (130) has at least two parallel perforated plates.
3. The industrial silicon refining apparatus as described in claim 1, characterized in that, On the side wall of the silicon packaging body (100), and on both sides perpendicular to the line connecting the packaging nozzle (120) and the central axis of the silicon packaging body (100), there are lifting lugs (140).
4. The industrial silicon refining apparatus as described in claim 1, characterized in that, The first ventilation pipe (220) has at least a first pipe section (223), a second pipe section (224) and a third pipe section (225) connected in sequence; the first pipe section (223) is provided with a first interface (221) that communicates with the ventilation connector (210); the third pipe section (225) is provided with a second interface (222).
5. The industrial silicon refining apparatus as described in claim 4, characterized in that, The first tube segment (223) is disposed below the silicon package body (100); and the first tube segment (223) is disposed parallel to the bottom wall of the silicon package body (100), and the first tube segment (223) extends from the middle of the bottom wall of the silicon package body (100) to the edge.
6. The industrial silicon refining apparatus as described in claim 5, characterized in that, The bottom of the silicon cladding body (100) is provided with an installation groove (150), which is adapted to the first pipe segment (223), and the first pipe segment (223) passes through the installation groove (150).
7. The industrial silicon refining apparatus as described in claim 4, characterized in that, The second tube segment (224) is disposed on the outer side of the side wall of the silicon-clad body (100); and the second tube segment (224) is disposed parallel to the side wall of the silicon-clad body (100), and the second tube segment (224) extends upward from the bottom of the side wall of the silicon-clad body (100).
8. The industrial silicon refining apparatus as described in claim 7, characterized in that, The third pipe segment (225) extends from a position near the side wall of the silicon cladding body (100) toward the outside of the side wall of the silicon cladding body (100).
9. The industrial silicon refining apparatus as described in any one of claims 1-8, characterized in that, The vent connector (210) is a three-dimensional three-way connector assembly. The other end of the vent connector (210) is connected to a second vent pipe (230). A fourth interface (232) is provided on the second vent pipe (230). The angle between the line connecting the fourth interface (232) and the central axis of the silicon package body (100) and the line connecting the nozzle (120) and the central axis of the silicon package body (100) is within the range of 130°~150°. The second vent pipe (230) is located on the silicon package body (100) on the other side, different from the first vent pipe (220). Both the fourth interface (232) and the second interface (222) are provided with check valves (250).