Mixing heating furnace for purifying metal silicon

Abstract

The utility model discloses a mixing heating furnace for purifying metal silicon, which relates to the technical field of metal silicon purification equipment and comprises a bottom cylinder, a first cavity is arranged in the bottom cylinder, cooling liquid is filled in the first cavity, a second cavity is arranged in the middle of the bottom cylinder, a heat conduction cylinder is embedded in the inner wall of the second cavity, and a heating device is arranged in the heat conduction cylinder. An air channel is formed in the bottom of the bottom cylinder, a draught fan is fixedly installed at a port of the air channel, an intermediate frequency furnace shell is fixedly installed at the top end of the bottom cylinder, an induction coil is installed on the inner side of the intermediate frequency furnace shell, and a third cavity is formed in the middle of the intermediate frequency furnace shell. According to the utility model, a series of structures are arranged, so that the cooling speed of the silicon metal is higher, and the crystallization and precipitation of the silicon metal are facilitated, thereby facilitating the improvement of the purification speed of the silicon, avoiding the additional use of a cooling water tank for cooling, saving the energy consumption during the operation of the heating furnace, and being more energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of metal silicon purification equipment, and specifically relates to a mixed heating furnace for metal silicon purification. Background Technique

[0002] Metallic silicon is an artificial material. During the purification and manufacturing process of silicon, it is necessary to separate silicon from silicon compounds, and then further purify the separated silicon. The electric furnace smelting method utilizes the high heat generated by the electric furnace to electrolyze silicon ore, enabling silicon to react with carbon to form silicon dioxide and carbon dioxide, and then reducing silicon dioxide to metallic silicon through equipment.

[0003] When the existing mixed heating furnace for metal silicon purification heats and purifies silicon ore, it usually cools the outside of the furnace body by sending cold water into the pipes surrounding the outside of the furnace body, which makes the cooling rate of metallic silicon inside the furnace slower, is not conducive to the crystallization of silicon, and leads to a slower purification rate of silicon. In addition, after the existing mixed heating furnace reduces the temperature with cold water, the cold water that has absorbed heat will be transferred to the cooling box for cooling, which easily wastes the heat dissipated after the cold water absorbs heat. At the same time, the operation of the cooling box also requires energy consumption, and it is not energy-saving and environmentally friendly enough. Content of the Utility Model

[0004] The purpose of the utility model is to provide a mixed heating furnace for metal silicon purification to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A mixed heating furnace for metal silicon purification, including a bottom cylinder, a first cavity is opened inside the bottom cylinder, a coolant is filled inside the first cavity, a second cavity is opened in the middle of the bottom cylinder, a heat conduction cylinder is embedded on the inner wall of the second cavity, an air duct is opened at the bottom of the bottom cylinder, a blower is fixedly installed at the port of the air duct, a medium-frequency furnace housing is fixedly installed at the top of the bottom cylinder, an induction coil is installed inside the medium-frequency furnace housing, a third cavity is opened in the middle of the medium-frequency furnace housing, a material cylinder is arranged inside the third cavity, a support plate is clamped at the bottom end of the material cylinder, and a cover plate is movably connected to the top of the medium-frequency furnace housing.

[0006] Preferably, a liquid inlet pipe penetrates through the top of one side wall of the bottom cylinder, and a first solenoid valve is fixedly installed on the outside of the liquid inlet pipe.

[0007] Preferably, a liquid discharge pipe penetrates through the middle of the other side wall of the bottom cylinder, a second solenoid valve is fixedly installed on the outside of the liquid discharge pipe, and both the liquid inlet pipe and the liquid discharge pipe are communicated with the inside of the first cavity.

[0008] Preferably, a hydraulic cylinder is fixedly installed in the middle of the air duct, and a piston rod is movably connected to the output end of the hydraulic cylinder.

[0009] Preferably, the top end of the piston rod is snap-connected to the bottom end of the support plate, and the support plate is movably connected to the second cavity and the third cavity respectively through the piston rod.

[0010] Preferably, the material cylinder is movably connected to the second cavity and the third cavity respectively through the support plate.

[0011] Preferably, the second cavity and the third cavity are communicated with each other, and the air duct is communicated with the second cavity.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. In this mixed heating furnace for metal silicon purification, through the first cavity, the second cavity, the third cavity and the support plate, the metal silicon in the furnace can move up and down between the intermediate frequency furnace and the bottom cylinder for cooling during purification, so that the metal silicon in the furnace can be in an environment of sudden cooling and sudden heating, making the cooling rate of the metal silicon faster, and at the same time being more conducive to the crystallization and precipitation of the metal silicon, thus being beneficial to improving the purification speed of silicon.

[0014] 2. In this mixed heating furnace for metal silicon purification, through the air duct, the heat conducting cylinder and the fan, the heat dissipated by the water after absorbing heat in the bottom cylinder can enter the third cavity of the intermediate frequency furnace under the blowing of the fan, so that when the intermediate frequency furnace maintains the temperature required for metal silicon purification, less energy is consumed, and the water after absorbing heat can be cooled under the action of the heat conducting cylinder, avoiding the additional use of a cooling water tank for cooling, thus saving the energy consumption during the operation of the heating furnace and being more energy-saving and environment-friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 is a schematic diagram of the first cavity and the second cavity structure of the utility model;

[0017] Figure 3 is a schematic diagram of the support plate and the third cavity structure of the utility model;

[0018] Figure 4 is a schematic diagram of the bottom cylinder and the coolant structure of the utility model.

[0019] In the figure: 1. Cover plate; 2. Intermediate frequency furnace shell; 3. Charge cylinder; 4. Bottom cylinder; 5. First solenoid valve; 6. Liquid inlet pipe; 7. Second solenoid valve; 8. Drain pipe; 9. Fan; 10. Induction coil; 11. Support plate; 12. First cavity; 13. Cooling liquid; 14. Piston rod; 15. Second cavity; 16. Heat conduction cylinder; 17. Air duct; 18. Hydraulic cylinder; 19. Third cavity. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] As Figures 1 to 4As shown in the figure, the hybrid heating furnace for metal silicon purification in this embodiment includes a bottom cylinder 4. A first cavity 12 is formed inside the bottom cylinder 4, and a coolant 13 is filled inside the first cavity 12. A second cavity 15 is formed in the middle of the bottom cylinder 4, and a heat conduction cylinder 16 is embedded on the inner wall of the second cavity 15. An air duct 17 is formed at the bottom of the bottom cylinder 4, and a blower 9 is fixedly installed at the port of the air duct 17. The top end of the bottom cylinder 4 is fixedly installed with an intermediate frequency furnace shell 2. An induction coil 10 is installed inside the intermediate frequency furnace shell 2. A third cavity 19 is formed in the middle of the intermediate frequency furnace shell 2, and a material cylinder 3 is arranged inside the third cavity 19. A support plate 11 is engaged at the bottom end of the material cylinder 3. The top of the intermediate frequency furnace shell 2 is movably connected with a cover plate 1.

[0024] Specifically, the outer wall of the bottom cylinder 4 is made of a material with better heat insulation performance, so that the heat after the temperature of the coolant 13 rises will transfer to the heat conduction cylinder 16, enabling the heat to be concentrated in the air duct 17 and the second cavity 15, which is conducive to the blower 9 blowing the heat into the third cavity 19, enabling the silicon ore to be heated by a combination of induction eddy current and hot air, thus helping to reduce the energy consumption required for the intermediate frequency furnace to heat the silicon ore. The first cavity 12 is in a ring structure, surrounding the outer position inside the bottom cylinder 4, enabling the coolant 13 to surround the material cylinder 3, which is conducive to the heat conduction inside the material cylinder 3. The coolant 13 can rapidly cool the material cylinder 3 moved into the second cavity 15, enabling the silicon dioxide in the material cylinder 3 to crystallize faster. The role of the heat conduction cylinder 16 is to accelerate the heat conduction efficiency. The role of the air duct 17 is to enable the blower 9 to blow the hot air flow from the second cavity 15 into the third cavity 19, thus facilitating the hybrid heating of the silicon ore in the material cylinder 3. The principle of the intermediate frequency furnace heating metal silicon is to utilize the electromagnetic induction principle to cause eddy currents to be generated in the silicon metal inside the material cylinder 3, melting the silicon metal by heating. The role of the third cavity 19 is to enable the material cylinder 3 to move smoothly inside the intermediate frequency furnace, thus facilitating the heating and cooling of the raw materials in the material cylinder 3. The support plate 11 is also made of a material with a relatively high thermal conductivity and can conduct heat to the material cylinder 3 smoothly. The role of the cover plate 1 is to seal the top of the material cylinder 3, facilitating the circulation of heat inside the material cylinder 3, thereby being more energy-saving and environmentally friendly.

[0025] Furthermore, a liquid inlet pipe 6 penetrates through the top of one side wall of the bottom cylinder 4, and a first electromagnetic valve 5 is fixedly installed on the outside of the liquid inlet pipe 6. The role of the liquid inlet pipe 6 is to supplement the coolant 13 into the first cavity 12 of the bottom cylinder 4, enabling the coolant 13 lost due to heating to be replenished in a timely manner.

[0026] Furthermore, a liquid discharge pipe 8 penetrates through the middle of the other side wall of the bottom cylinder 4, and a second electromagnetic valve 7 is fixedly installed on the outside of the liquid discharge pipe 8. Both the liquid inlet pipe 6 and the liquid discharge pipe 8 are communicated with the inside of the first cavity 12. The role of the liquid discharge pipe 8 is to facilitate the replacement of the coolant 13 in the first cavity 12 and ensure that the coolant 13 can produce a normal cooling effect.

[0027] Furthermore, a hydraulic cylinder 18 is fixedly installed in the middle of the air duct 17. The output end of the hydraulic cylinder 18 is movably connected to a piston rod 14. The function of the hydraulic cylinder 18 is to support the pallet 11 through the piston rod 14, so that the pallet 11 can support the material cylinder 3.

[0028] Furthermore, the top end of the piston rod 14 is snap-connected to the bottom end of the pallet 11. The pallet 11 is movably connected to the second cavity 15 and the third cavity 19 respectively through the piston rod 14. The outer edge of the pallet 11 is upturned, so that the material cylinder 3 can be snap-fitted on the pallet 11, thereby increasing the stability after the connection between the material cylinder 3 and the pallet 11.

[0029] Furthermore, the material cylinder 3 is movably connected to the second cavity 15 and the third cavity 19 respectively through the pallet 11, so that the material cylinder 3 can slide up and down in the second cavity 15 and the third cavity 19, which is conducive to realizing the heating and cooling of the material cylinder 3.

[0030] Furthermore, the second cavity 15 and the third cavity 19 are connected. The air duct 17 is connected to the second cavity 15, so that the air flow blown by the fan 9 can drive the heat in the second cavity 15 to accelerate and flow into the third cavity 19, thereby realizing the mixed heating of the material cylinder 3 in the third cavity 19.

[0031] The usage method of this embodiment is as follows: Before using this mixed heating furnace for metal silicon purification, it is necessary to first connect this heating furnace to an external power supply, then open the cover plate 1, introduce the silicon ore to be purified into the opening at the top of the material cylinder 3, then close the cover plate 1, and energize the induction coil 10, so that eddy currents are generated in the metal silicon in the material cylinder 3, and the metal silicon starts to heat up. When the metal silicon in the material cylinder 3 needs to be cooled, the hydraulic cylinder 18 can be started, so that the hydraulic cylinder 18 drives the piston rod 14 to descend, driving the pallet 11 to descend, so that the material cylinder 3 at the top of the pallet 11 descends from the third cavity 19 into the second cavity 15. At this time, since the metal silicon in the material cylinder 3 is separated from the intermediate frequency furnace, no eddy currents are generated in the metal silicon in the material cylinder 3. At the same time, since the periphery of the second cavity 15 is filled with low-temperature coolant 13, the metal silicon in the material cylinder 3 quickly conducts heat to the coolant 13 in the first cavity 12 through the heat conduction cylinder 16, so that the temperature of the coolant 13 rises, and at the same time the temperature of the material cylinder 3 drops. Then, the hydraulic cylinder 18 can be controlled to rise, so that the material cylinder 3 returns to the intermediate frequency furnace for heating again, and the temperature in the second cavity 15 will drop, so that the heated coolant 13 conducts heat to the second cavity 15 through the heat conduction cylinder 16. Then, the fan 9 can be started, so that the fan 9 blows the heat in the second cavity 15 to the third cavity 19 through the air duct 17, so that the heat is concentrated at the bottom of the pallet 11, so that the material cylinder 3 that returns to the third cavity 19 can obtain the heat conducted by the intermediate frequency furnace and hot air at the same time, so that the material cylinder 3 can be heated in a mixed heating mode.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A mixed heating furnace for purifying metallurgical silicon, comprising a bottom cylinder (4), characterized in that: A first cavity (12) is formed inside the bottom cylinder (4), and a coolant (13) is filled inside the first cavity (12). A second cavity (15) is formed in the middle of the bottom cylinder (4), and a heat conducting cylinder (16) is embedded in the inner wall of the second cavity (15). An air duct (17) is formed at the bottom of the bottom cylinder (4), and a blower (9) is fixedly installed at the port of the air duct (17). The top of the bottom cylinder (4) is fixedly installed with a medium frequency furnace shell (2), and an induction coil (10) is installed inside the medium frequency furnace shell (2). A third cavity (19) is formed in the middle of the medium frequency furnace shell (2), and a material cylinder (3) is arranged inside the third cavity (19). A support plate (11) is engaged at the bottom end of the material cylinder (3). The top of the medium frequency furnace shell (2) is movably connected with a cover plate (1).

2. The hybrid heating furnace for metal silicon purification according to claim 1, characterized in that: A liquid inlet pipe (6) penetrates through the top of one side wall of the bottom cylinder (4), and a first electromagnetic valve (5) is fixedly installed on the outer side of the liquid inlet pipe (6).

3. The hybrid heating furnace for metal silicon purification according to claim 2, wherein: A liquid discharge pipe (8) penetrates through the middle of the other side wall of the bottom cylinder (4), and a second electromagnetic valve (7) is fixedly installed on the outer side of the liquid discharge pipe (8). Both the liquid inlet pipe (6) and the liquid discharge pipe (8) are communicated with the inside of the first cavity (12).

4. A mixed heating furnace for metal silicon purification according to claim 1, characterized in that: A hydraulic cylinder (18) is fixedly installed in the middle of the air duct (17), and a piston rod (14) is movably connected to the output end of the hydraulic cylinder (18).

5. A hybrid heating furnace for metal silicon purification according to claim 4, characterized in that: The top end of the piston rod (14) is engaged and connected with the bottom end of the support plate (11), and the support plate (11) is movably connected to the second cavity (15) and the third cavity (19) respectively through the piston rod (14).

6. The hybrid heating furnace for metal silicon purification according to claim 1, characterized in that: The material cylinder (3) is movably connected to the second cavity (15) and the third cavity (19) respectively through the support plate (11).

7. A hybrid heating furnace for metal silicon purification according to claim 1, characterized in that: The second cavity (15) is communicated with the third cavity (19), and the air duct (17) is communicated with the second cavity (15).

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