CN115650238A - High-quality industrial silicon preparation equipment and method - Google Patents
High-quality industrial silicon preparation equipment and method Download PDFInfo
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- CN115650238A CN115650238A CN202211374630.6A CN202211374630A CN115650238A CN 115650238 A CN115650238 A CN 115650238A CN 202211374630 A CN202211374630 A CN 202211374630A CN 115650238 A CN115650238 A CN 115650238A
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 124
- 239000010703 silicon Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical compound O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000012535 impurity Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 3
- 238000007670 refining Methods 0.000 claims description 39
- 238000007664 blowing Methods 0.000 claims description 35
- 238000003860 storage Methods 0.000 claims description 14
- 238000003723 Smelting Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- -1 firstly Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007723 transport mechanism Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention relates to the technical field of industrial silicon preparation, in particular to high-quality industrial silicon preparation equipment and a method; the device comprises a silicon water bag for transferring liquid silicon, a silicon water bag lifting appliance, a rail bag trolley, an air conveying mechanism, an oxygen conveying mechanism, an impurity removing material adding mechanism, a pushing assembly, an installation frame and a plasma generator.
Description
Technical Field
The invention relates to the technical field of industrial silicon preparation, in particular to high-quality industrial silicon preparation equipment and a method.
Background
The industrial silicon is prepared by smelting in a three-phase ore furnace by a slag-free submerged arc electric heating method, wherein high-purity silica and a high-quality carbonaceous reducing agent are selected as raw materials, a gaseous reduction reaction is completed at a high temperature to form liquid silicon which is gathered on a furnace wall and falls into a molten pool, the liquid silicon can be discharged after smelting for 2 to 3 hours, and the liquid silicon is cast, cooled, molded, warehoused and finely packaged.
In order to improve the quality of industrial silicon, the external refining is carried out by using an oxidation refining method in the process of cooling liquid silicon, firstly, air is blown into the bottom of a silicon water bag for transporting the liquid silicon, meanwhile, impurities are added into the silicon water bag, finally, oxygen is blown into the silicon water bag, and impurities in the liquid silicon are removed through the reaction process of oxidizing the impurities, so that high-quality industrial silicon is obtained.
However, in the prior art, in the process of performing the external refining on the liquid silicon, the blowing of the refining gas and the addition of a large amount of impurities obviously reduce the temperature of the liquid silicon, and the external refining is performed for a long time only by utilizing the residual heat of the liquid silicon, so that the efficiency of the external refining is low.
Disclosure of Invention
The invention aims to provide high-quality industrial silicon preparation equipment and a method, which solve the problem that in the prior art, in the process of performing external refining on liquid silicon, the external refining efficiency is low in a mode of blowing refining gas and adding a large amount of impurities to obviously reduce the temperature of the liquid silicon and performing long-time external refining by only utilizing the waste heat of the liquid silicon.
In order to achieve the purpose, the invention provides high-quality industrial silicon preparation equipment and a method, wherein the high-quality industrial silicon preparation equipment comprises a silicon water bag for transferring liquid silicon, a silicon water bag lifting appliance, a rail package vehicle, an air conveying mechanism, an oxygen conveying mechanism, an impurity removing material adding mechanism, a pushing assembly, a mounting frame and a plasma generator, wherein the silicon water bag lifting appliance is mounted on one side of a molten pool of a three-phase submerged arc furnace, the silicon water bag lifting appliance is used for lifting the silicon water bag, the rail is paved on the ground, the rail package vehicle is arranged on the rail, and the rail package vehicle is used for placing the silicon water bag;
the upper surface of track package car still is provided with air conveying mechanism with oxygen conveying mechanism, the bottom of silicon water drum is provided with first lead pipe and the second lead pipe of blowing, first lead pipe of blowing with air conveying mechanism's output is corresponding, the second lead pipe of blowing with oxygen conveying mechanism's output is corresponding, the upper surface of track package car still is provided with the slide rail, it is provided with to slide on the slide rail the mounting bracket, the upper surface of track package car still is provided with promote the subassembly, it is used for promoting the mounting bracket slides on the slide rail, be provided with on the mounting bracket impurity removal material adds the mechanism with plasma generator, impurity removal material adds the mechanism and is used for to the inside throwing in impurity removal material of silicon water drum, plasma generator is used for to heat the silicon water drum.
The mounting bracket comprises a sliding seat, a supporting column and a mounting plate, one end of the supporting column is fixedly connected with the sliding seat, the other end of the supporting column is fixedly connected with the mounting plate, the sliding seat slides on the sliding rail, the plasma generator and the impurity removing material adding mechanism are arranged on the mounting plate, an electric push rod is arranged at the bottom of the mounting plate, a connecting piece is arranged at the output end of the electric push rod, and the connecting piece is used for connecting an output spray head of the plasma generator.
The pushing assembly comprises a servo motor, a screw rod and a screw rod sleeve, the servo motor is installed on the upper surface of the track wrapping vehicle, the output end of the servo motor is provided with the screw rod, the screw rod sleeve is arranged on the screw rod, and the screw rod sleeve is detachably connected with the sliding seat.
Wherein, air delivery mechanism includes air compressor and first conveyer pipe, air compressor installs the upper surface of track chartered plane, air compressor's output is provided with first conveyer pipe, first conveyer pipe is kept away from air compressor's one end with first air-blowing induction pipe links to each other.
The oxygen conveying mechanism comprises an oxygen bottle and a second conveying pipe, the oxygen bottle is installed on the upper surface of the rail trolley, the control valve of the oxygen bottle is connected with the second conveying pipe, and one end of the oxygen bottle is far away from the second conveying pipe and is connected with the second blowing guide pipe.
The impurity removing and adding mechanism comprises a storage box, a square discharging pipe and a gate valve, the storage box is installed above the mounting plate, the square discharging pipe is arranged at the bottom of the storage box, one end of the storage box, far away from the square discharging pipe, corresponds to the silicon water bag, and the gate valve is arranged on the square discharging pipe.
The invention also provides a preparation method of the high-quality industrial silicon, which is applied to the high-quality industrial silicon preparation equipment and comprises the following steps:
metering and uniformly mixing high-purity silica and a carbonaceous reducing agent, putting the mixture into a three-phase submerged arc furnace for smelting, and after the smelting is finished, collecting formed liquid silicon on a furnace wall and falling into a molten pool;
liquid silicon in a molten pool is filled into the silicon water bag, the silicon water bag filled with the liquid silicon is hung on the upper surface of the rail trolley by using the silicon water bag hanger, and the silicon water bag filled with the liquid silicon is conveyed to a cooling process by using the rail trolley;
during the conveying process, the pushing assembly is started, so that the mounting rack on the slide rail slides to one side of the silicon water bag;
introducing air into the silicon water bag through the first blowing guide pipe by using the air conveying mechanism, adding impurity removing materials into the silicon water bag in batches through the impurity removing material adding mechanism during the air blowing process, and after the impurity removing materials are added, introducing oxygen into the silicon water bag through the first blowing guide pipe by using the oxygen conveying mechanism, so that secondary refining is performed by using an oxidation refining method during the transportation process of the liquid silicon in the silicon water bag;
and in the process of external refining, starting the plasma generator to directly heat the surface of the liquid silicon in the silicon water bag, so that the liquid silicon is always kept at more than 1600 ℃ in the process of external refining, and the efficiency of external refining of the liquid silicon is improved.
The invention relates to high-quality industrial silicon preparation equipment and a method, which comprises a silicon water bag for transferring liquid silicon, a silicon water bag lifting appliance, a rail package vehicle, an air conveying mechanism, an oxygen conveying mechanism, an impurity removing material adding mechanism, a pushing assembly, a mounting frame and a plasma generator, wherein the silicon water bag containing the liquid silicon is lifted on the upper surface of the rail package vehicle by the silicon water bag lifting appliance, the pushing assembly is started in the process of conveying the silicon water bag to a cooling process by the rail package vehicle, the mounting frame on a sliding rail slides to one side of the silicon water bag, air is input into the silicon water bag by the air conveying mechanism, impurity removing materials are added into the silicon water bag in batches by the impurity removing material adding mechanism during blowing air, after the impurity removing materials are added, oxygen is input into the silicon water bag by the oxygen conveying mechanism, the external refining is carried out by an oxidation refining method, the plasma generator is started in the external refining process, the surface of the liquid silicon in the silicon water bag is directly heated, and the silicon water bag refining efficiency is kept at 1600 ℃ or more throughout the external refining process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a high-quality industrial silicon production apparatus according to the present invention.
FIG. 2 is a schematic view of a part of the structure of a high-quality industrial silicon production apparatus according to the present invention.
Fig. 3 is an enlarged view of a portion of the structure of fig. 2 a according to the present invention.
Fig. 4 is a schematic view of a connection structure of the pushing assembly and the mounting bracket provided by the invention.
Fig. 5 is a schematic view of a disassembled structure of the rotating seat and the placing plate provided by the invention.
FIG. 6 is a flow chart of the steps of the method for producing high quality industrial silicon according to the present invention.
101-silicon water bag, 102-silicon water bag lifting appliance, 103-rail, 104-rail bag vehicle, 105-air conveying mechanism, 106-oxygen conveying mechanism, 107-impurity removing material adding mechanism, 108-pushing assembly, 109-mounting rack, 110-plasma generator, 111-first air blowing guide pipe, 112-second air blowing guide pipe, 113-slide rail, 114-slide seat, 115-support column, 116-mounting plate, 117-electric push rod, 118-connecting piece, 119-servo motor, 120-screw rod, 121-screw rod sleeve, 122-air compressor, 123-first conveying pipe, 124-oxygen bottle, 125-second conveying pipe, 126-storage box, 127-square discharging pipe, 128-gate valve, 129-rotating seat, 130-groove, 131-placing plate, 132-rotating assembly, 133-driven tooth portion, 134-driving motor, 135-reducer and 136-output gear.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 6, the present invention provides a high-quality industrial silicon preparation apparatus and method, the high-quality industrial silicon preparation apparatus includes a silicon ladle 101 for transporting liquid silicon, a silicon ladle spreader 102, a rail 103, a rail car 104, an air conveying mechanism 105, an oxygen conveying mechanism 106, an impurity removal material adding mechanism 107, a pushing assembly 108, a mounting rack 109, and a plasma generator 110, the silicon ladle spreader 102 is installed at one side of a molten bath of a three-phase submerged arc furnace, the silicon ladle spreader 102 is used for lifting the silicon ladle 101, the rail 103 is laid on the ground, the rail car 104 is arranged on the rail 103, and the rail car 104 is used for placing the silicon ladle 101;
the upper surface of track package car 104 still is provided with air conveying mechanism 105 with oxygen conveying mechanism 106, the bottom of silicon water package 101 is provided with first air-blowing induction pipe 111 and second air-blowing induction pipe 112, first air-blowing induction pipe 111 with air conveying mechanism 105's output is corresponding, second air-blowing induction pipe 112 with oxygen conveying mechanism 106's output is corresponding, the upper surface of track package car 104 still is provided with slide rail 113, slide on slide rail 113 and be provided with mounting bracket 109, the upper surface of track package car 104 still is provided with promote subassembly 108, it is used for promoting to promote subassembly 108 mounting bracket 109 slides on slide rail 113, be provided with on mounting bracket 109 remove miscellaneous material add mechanism 107 with plasma generator 110, remove miscellaneous material and add the mechanism 107 and be used for to throwing in the miscellaneous material to the inside of silicon water package 101, plasma generator 110 is used for right silicon water package 101 heats.
In this embodiment, the silicon ladle 101 containing liquid silicon is hung on the upper surface of the rail car 104 by the silicon ladle hanger 102, the pushing assembly 108 is activated during the process of transporting the silicon ladle 101 containing liquid silicon to the cooling process by the rail car 104, the mounting frame 109 on the slide rail 113 is slid to one side of the silicon ladle 101, air is fed into the silicon ladle 101 through the first blowing introduction pipe 111 by the air feeding mechanism 105, impurities are fed into the silicon ladle 101 in batches by the impurities feeding mechanism 107 during the period of blowing air, after the impurities are fed, oxygen is fed into the silicon ladle 101 through the first blowing introduction pipe 111 by the oxygen feeding mechanism 106, so that the external refining is performed by an oxidation refining method during the transportation of the liquid silicon in the silicon ladle 101, and the plasma generator 110 is activated during the external refining to directly heat the surface of the liquid silicon in the silicon ladle 101, so that the efficiency of the external refining is always maintained at 1600 ℃.
Further, the mounting bracket 109 includes a sliding seat 114, a supporting column 115 and a mounting plate 116, one end of the supporting column 115 is fixedly connected to the sliding seat 114, the other end of the supporting column 115 is fixedly connected to the mounting plate 116, the sliding seat 114 slides on the sliding rail 113, the plasma generator 110 and the impurity removing and adding mechanism 107 are arranged on the mounting plate 116, an electric push rod 117 is arranged at the bottom of the mounting plate 116, a connecting piece 118 is arranged at an output end of the electric push rod 117, and the connecting piece 118 is used for connecting an output nozzle of the plasma generator 110.
In this embodiment, the pushing assembly 108 is activated to drive the sliding seat 114 to slide on the sliding rail 113, so as to adjust the position of the mounting rack 109, and after the mounting rack 109 slides to one side of the silicone pack 101, the electric push rod 117 is activated to drive the output nozzle of the plasma generator 110 to be located on the upper surface of the liquid silicone in the silicone pack 101 through the connecting member 118.
Further, the pushing assembly 108 comprises a servo motor 119, a screw rod 120 and a screw rod sleeve 121, the servo motor 119 is installed on the upper surface of the rail car 104, the screw rod 120 is arranged at the output end of the servo motor 119, the screw rod sleeve 121 is arranged on the screw rod 120, and the screw rod sleeve 121 is detachably connected with the sliding seat 114.
In this embodiment, the servo motor 119 is started to drive the screw rod 120 to rotate, and the screw rod sleeve 121 is detachably connected to the sliding seat 114, so that the sliding seat 114 slides on the sliding rail 113.
Further, the air delivery mechanism 105 includes an air compressor 122 and a first delivery pipe 123, the air compressor 122 is installed on the upper surface of the rail package 104, the first delivery pipe 123 is installed at the output end of the air compressor 122, and one end of the first delivery pipe 123, which is far away from the air compressor 122, is connected to the first blowing guide pipe 111.
In this embodiment, the air compressor 122 is started to blow air into the interior of the silicon wafer 101 through the first delivery pipe 123 in cooperation with the first blowing gas introduction pipe 111.
Further, the oxygen delivery mechanism 106 includes an oxygen cylinder 124 and a second delivery pipe 125, the oxygen cylinder 124 is installed on the upper surface of the rail car 104, the second delivery pipe 125 is connected to a control valve of the oxygen cylinder 124, and an end of the second delivery pipe 125 far away from the oxygen cylinder 124 is connected to the second insufflation guide tube 112.
In this embodiment, the control valve of the oxygen cylinder 124 is opened, and oxygen is blown into the silicon ladle 101 through the second delivery pipe 125 in cooperation with the second blowing introduction pipe 112.
Further, the impurity removing and adding mechanism 107 comprises a storage box 126, a square discharge pipe 127 and a gate valve 128, the storage box 126 is installed above the installation plate 116, the square discharge pipe 127 is arranged at the bottom of the storage box 126, one end of the square discharge pipe 127, which is far away from the storage box 126, corresponds to the silicon water drum 101, and the gate valve 128 is arranged on the square discharge pipe 127.
In this embodiment, the gate valve 128 controls the opening and closing of the square discharge pipe 127, so that the impurity-removed material in the storage bin 126 is added to the interior of the ladle 101 in batches.
Further, the upper surface of the rail package vehicle 104 is further provided with a rotating base 129, the upper surface of the rotating base 129 is provided with a groove 130, an end portion of the groove 130 is movably provided with a placing plate 131, the placing plate 131 is used for placing the silicon water package 101, a rotating assembly 132 is arranged inside the groove 130, one surface, close to the groove 130, of the placing plate 131 is provided with a driven tooth portion 133, and an output end of the rotating assembly 132 is in mechanical transmission with the driven tooth portion 133.
In this embodiment, in the process of lifting the silicon pack 101 containing liquid silicon to the upper surface of the placing plate 131 and heating the liquid silicon in the silicon pack 101 by the plasma generator 110, the rotating assembly 132 is started to drive the placing plate 131 to rotate at the end of the groove 130, so that the silicon pack 101 rotates above the rail car 104, and the liquid silicon in the silicon pack 101 is heated more uniformly by the plasma generator 110.
Further, the rotating assembly 132 includes a driving motor 134, a speed reducer 135 and an output gear 136, the driving motor 134 is installed inside the groove 130, the speed reducer 135 is installed at an output end of the driving motor 134, the output gear 136 is installed at an output end of the speed reducer 135, and the output gear 136 is engaged with the driven gear.
In this embodiment, the driving motor 134 is started, and the output gear 136 is driven to rotate after the output rotation speed is reduced by the reducer 135, so that the placing plate 131 rotates at the end of the recess 130 because the output gear 136 is engaged with the driven gear.
Referring to fig. 6, the present invention further provides a method for preparing high-quality industrial silicon, which is applied to the high-quality industrial silicon preparation apparatus, and comprises the following steps:
s1: metering and uniformly mixing high-purity silica and a carbonaceous reducing agent, putting the mixture into a three-phase submerged arc furnace for smelting, and after the smelting is finished, collecting the formed liquid silicon on the furnace wall and falling into a molten pool;
s2: loading liquid silicon in a molten pool into the silicon ladle 101, hoisting the silicon ladle 101 filled with the liquid silicon on the upper surface of the rail trolley 104 by using the silicon ladle hoisting tool 102, and conveying the silicon ladle 101 filled with the liquid silicon to a cooling process by using the rail trolley 104;
s6: during the conveying process, the pushing assembly 108 is started, so that the mounting rack 109 on the slide rail 113 slides to one side of the silicon ladle 101;
s4: introducing air into the interior of the ladle 101 through the first air blowing introduction pipe 111 by the air transport mechanism 105, adding miscellaneous materials to the interior of the ladle 101 in a batch manner through the miscellaneous material removing addition mechanism 107 while air is blown, and after the addition of miscellaneous materials is completed, introducing oxygen into the interior of the ladle 101 through the first air blowing introduction pipe 111 by the oxygen transport mechanism 106, thereby performing secondary refining using an oxidation refining method during the transportation of the liquid silicon in the ladle 101;
s5: and in the process of external refining, the plasma generator 110 is started to directly heat the surface of the liquid silicon in the silicon water bag 101, so that the liquid silicon is always kept at more than 1600 ℃ in the process of external refining, and the efficiency of external refining of the liquid silicon is improved.
In the embodiment, high-purity silica and carbonaceous reducing agent are measured, uniformly mixed, and then put into a three-phase submerged arc furnace for smelting, after the smelting is completed, the formed liquid silicon is gathered on the furnace wall and falls into a molten pool (in the smelting process, the furnace charge is required to be uniformly stirred before entering the furnace, the charging is uniform and is not biased, the furnace charge and the material stirring operation are seriously carried out according to the smelting process operation, the electrode is deeply and stably buried in the furnace charge without fire, the liquid silicon in the molten pool is filled into the silicon ladle 101, the silicon ladle 101 filled with the liquid silicon is hung on the upper surface of the rail car 104 by the silicon ladle hanger 102, the silicon ladle 101 filled with the liquid silicon is conveyed to a cooling process by the rail car 104, the pushing assembly 108 is started during the conveying process, so that the mounting rack 109 on the slide rail 113, sliding to one side of the silicon ladle 101, inputting air into the silicon ladle 101 through the first air blowing introduction pipe 111 by the air conveying mechanism 105, adding impurities into the silicon ladle 101 in batches by the impurities adding mechanism 107 during the air blowing, after the impurities are added, inputting oxygen into the silicon ladle 101 through the first air blowing introduction pipe 111 by the oxygen conveying mechanism 106, thereby performing external refining by an oxidation refining method during the transportation of the liquid silicon in the silicon ladle 101, starting the plasma generator 110 (the power of the plasma generator 110 is 60 KW) during the external refining, directly heating the surface of the liquid silicon in the silicon ladle 101, and keeping the liquid silicon at 1600 ℃ or above during the external refining, thereby improving the efficiency of liquid silicon refining outside the furnace.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A high-quality industrial silicon preparation device is characterized in that,
the device comprises a silicon water drum for transferring liquid silicon, a silicon water drum lifting tool, a rail, a track-type ladle car, an air conveying mechanism, an oxygen conveying mechanism, an impurity removing material adding mechanism, a pushing assembly, an installation frame and a plasma generator, wherein the silicon water drum lifting tool is installed on one side of a molten pool of a three-phase submerged arc furnace and used for lifting the silicon water drum, the rail is paved on the ground, the track-type ladle car is arranged on the rail, and the track-type ladle car is used for placing the silicon water drum;
the upper surface of track package car still is provided with air conveying mechanism with oxygen conveying mechanism, the bottom of silicon water drum is provided with first lead pipe and the second lead pipe of blowing, first lead pipe of blowing with air conveying mechanism's output is corresponding, the second lead pipe of blowing with oxygen conveying mechanism's output is corresponding, the upper surface of track package car still is provided with the slide rail, it is provided with to slide on the slide rail the mounting bracket, the upper surface of track package car still is provided with promote the subassembly, it is used for promoting the mounting bracket slides on the slide rail, be provided with on the mounting bracket impurity removal material adds the mechanism with plasma generator, impurity removal material adds the mechanism and is used for to the inside throwing in impurity removal material of silicon water drum, plasma generator is used for to heat the silicon water drum.
2. The high-quality industrial silicon production apparatus according to claim 1,
the mounting bracket includes sliding seat, support column and mounting panel, the one end of support column with sliding seat fixed connection, the other end of support column with mounting panel fixed connection, the sliding seat is in slide on the slide rail, be provided with on the mounting panel plasma generator with the edulcoration material adds the mechanism, the bottom of mounting panel is provided with electric putter, electric putter's output is provided with the connecting piece, the connecting piece is used for connecting plasma generator's output shower nozzle.
3. The high-quality industrial silicon production apparatus according to claim 2,
the pushing assembly comprises a servo motor, a screw rod and a screw rod sleeve, the servo motor is installed on the upper surface of the rail car, the output end of the servo motor is provided with the screw rod, the screw rod sleeve is arranged on the screw rod, and the screw rod sleeve is detachably connected with the sliding seat.
4. The high-quality industrial silicon production apparatus according to claim 1,
air delivery mechanism includes air compressor and first conveyer pipe, air compressor installs the upper surface of track package car, air compressor's output is provided with first conveyer pipe, first conveyer pipe is kept away from air compressor's one end with first air-blowing induction pipe links to each other.
5. The high-quality industrial silicon production apparatus according to claim 1,
oxygen conveying mechanism includes oxygen cylinder and second conveyer pipe, the oxygen cylinder is installed the upper surface of track package car, the control valve department of oxygen cylinder is connected with the second conveyer pipe, the second conveyer pipe is kept away from the one end of oxygen cylinder with the second is blown the guide pipe and is linked to each other.
6. The high-quality industrial silicon production apparatus according to claim 2,
edulcoration material adds mechanism includes storage case, square discharge tube and slide valve, the storage case is installed the top of mounting panel, the bottom of storage case is provided with square discharge tube, square discharge tube is kept away from the one end of storage case with the silicon water drum is corresponding, be provided with on the square discharge tube slide valve.
7. A high-quality industrial silicon production method applied to the high-quality industrial silicon production apparatus according to claim 1, characterized by comprising the steps of:
metering and uniformly mixing high-purity silica and a carbonaceous reducing agent, putting the mixture into a three-phase submerged arc furnace for smelting, and after the smelting is finished, collecting the formed liquid silicon on the furnace wall and falling into a molten pool;
liquid silicon in a molten pool is filled into the silicon water bag, the silicon water bag filled with the liquid silicon is hung on the upper surface of the rail trolley by using the silicon water bag hanger, and the silicon water bag filled with the liquid silicon is conveyed to a cooling process by using the rail trolley;
in the conveying process, the pushing assembly is started, so that the mounting rack on the sliding rail slides to one side of the silicon water bag;
introducing air into the silicon water bag through the first blowing guide pipe by using the air conveying mechanism, adding impurity removing materials into the silicon water bag in batches through the impurity removing material adding mechanism during the air blowing process, and after the impurity removing materials are added, introducing oxygen into the silicon water bag through the first blowing guide pipe by using the oxygen conveying mechanism, so that secondary refining is performed by using an oxidation refining method during the transportation process of the liquid silicon in the silicon water bag;
and in the process of external refining, starting the plasma generator to directly heat the surface of the liquid silicon in the silicon water bag, so that the liquid silicon is always kept at more than 1600 ℃ in the process of external refining, and the efficiency of external refining of the liquid silicon is improved.
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| CN202211374630.6A CN115650238A (en) | 2022-11-04 | 2022-11-04 | High-quality industrial silicon preparation equipment and method |
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| CN202211374630.6A CN115650238A (en) | 2022-11-04 | 2022-11-04 | High-quality industrial silicon preparation equipment and method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003119016A (en) * | 2001-10-10 | 2003-04-23 | Mutsufumi Yamauchi | Method of refining metallic silicon, and refining apparatus therefor |
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| CN212982479U (en) * | 2020-08-19 | 2021-04-16 | 龙陵县泰康硅业有限公司 | Industrial silicon refining furnace device that blows |
| CN114572988A (en) * | 2022-03-14 | 2022-06-03 | 城固县鑫弘矿业有限责任公司 | External refining and purifying method for industrial silicon |
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| JP2003119016A (en) * | 2001-10-10 | 2003-04-23 | Mutsufumi Yamauchi | Method of refining metallic silicon, and refining apparatus therefor |
| US20130247620A1 (en) * | 2010-11-29 | 2013-09-26 | Ulvac, Inc. | Silicon refining device and silicon refining method |
| CN202726036U (en) * | 2012-08-04 | 2013-02-13 | 昆明理工大学 | Induction heating two-man ladle for external refining of industrial silicon furnace |
| CN103058199A (en) * | 2013-01-21 | 2013-04-24 | 昆明理工大学 | Method for external refining purification of industrial silicon |
| CN203095624U (en) * | 2013-01-21 | 2013-07-31 | 昆明理工大学 | Two-man ladle for external refining of industrial silicon |
| CN207581367U (en) * | 2017-10-24 | 2018-07-06 | 重庆市黔永硅业有限公司 | Industrial silicon refining is two-mand ladle and smelting industrial silicon system |
| CN207581366U (en) * | 2017-10-24 | 2018-07-06 | 重庆市黔永硅业有限公司 | It blows outside industrial silicon furnace and two-mans ladle and smelting industrial silicon system |
| CN212982479U (en) * | 2020-08-19 | 2021-04-16 | 龙陵县泰康硅业有限公司 | Industrial silicon refining furnace device that blows |
| CN114572988A (en) * | 2022-03-14 | 2022-06-03 | 城固县鑫弘矿业有限责任公司 | External refining and purifying method for industrial silicon |
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