CN208532947U - A kind of fused salt electrolysis apparatus that ITO is reduced to indium metal - Google Patents

A kind of fused salt electrolysis apparatus that ITO is reduced to indium metal Download PDF

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Publication number
CN208532947U
CN208532947U CN201820849201.2U CN201820849201U CN208532947U CN 208532947 U CN208532947 U CN 208532947U CN 201820849201 U CN201820849201 U CN 201820849201U CN 208532947 U CN208532947 U CN 208532947U
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China
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fused salt
black
ito
bell
furnace body
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Expired - Fee Related
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CN201820849201.2U
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Chinese (zh)
Inventor
秦博
马文会
颜恒维
李绍元
雷云
伍继君
陈正杰
于洁
刘战伟
谢克强
魏奎先
杨斌
戴永年
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Abstract

The utility model relates to a kind of fused salt electrolysis apparatus that ITO is reduced to indium metal, belong to fused salt electrolysis apparatus technical field.The device includes furnace body, resistive heater, refractory insulating layer, black-fead crucible, graphite anode, graphite pallet, conductive metal stick, inert gas cavity I, air inlet, liquid metal cathode, fused salt, feed opening, inert gas cavity II, bell, gas vent.The utility model can increase cell reaction contact area using liquid metal cathode, and electrolytic production of metals is directly entered liquid metal cathode, will not be wrapped in ITO powder surface and hinder reaction;ITO is set to be reduced to the whole process safety and environmental protection of indium metal using the device of the utility model, no pernicious gas and harmful waste water generate.

Description

A kind of fused salt electrolysis apparatus that ITO is reduced to indium metal
Technical field
The utility model relates to a kind of fused salt electrolysis apparatus that ITO is reduced to indium metal, belong to fused salt electrolysis apparatus skill Art field.
Background technique
Indium is a kind of important electronic industrial material, mainly for the production of ITO target.Indium oxide is in ITO(indium oxide antimony) In content be about 90%, since indium belongs to scarce resource, and the recycling and reusing of indium is then particularly important.Currently, ITO target The utilization rate of material sputter coating is generally 30%, and remainder becomes ITO waste material, and generated in ITO production leftover pieces, cut It cuts, waste product etc. all can serve as the secondary resource of indium production.Currently, for the method that indium metal is extracted in recycling from ITO waste material It mainly include that acid extracting, ion-exchange, solvent extraction etc. chemically and physically purify the process integration combined.Using fused salt Electrolysis method is reduced directly ITO waste material, whole process safety and environmental protection, the indium meeting that no pernicious gas and harmful waste water are generated, but restored Being wrapped in ITO powder surface hinders reaction to carry out, and reaction rate and current efficiency is caused to decline.
Utility model content
The utility model is directed to prior art ITO(indium oxide antimony) current efficiency is low in electrolytic process and reaction rate is slow etc. Problem, provides a kind of fused salt electrolysis apparatus that ITO is reduced to indium metal, and the utility model can be increased using liquid metal cathode Cell reaction contact area, electrolytic production of metals are directly entered liquid metal cathode, will not be wrapped in ITO powder surface and hinder instead It answers;ITO is set to be reduced to the whole process safety and environmental protection of indium metal using the device of the utility model, no pernicious gas and nocuousness are useless Water generates.
The utility model be solve its technical problem and the technical solution adopted is that:
A kind of fused salt electrolysis apparatus that ITO is reduced to indium metal, including furnace body 1, resistive heater 2, refractory insulating layer 3, black-fead crucible 4, graphite anode 5, graphite pallet 6, conductive metal stick 7, inert gas cavity I 9, air inlet 10, liquid metal yin Pole 11, fused salt 13, feed opening 16, inert gas cavity II 19, bell 21, gas vent 20, bell 21 are arranged in 1 top of furnace body, furnace 1 inner wall of body is provided with refractory insulating layer 3, and several layers resistive heater 2, adding thermal resistance are evenly arranged with inside refractory insulating layer 3 2 external heating power supplies of silk, 1 bottom wall of furnace body middle part are vertically arranged with the conductive metal stick 7 across 1 bottom wall of furnace body, conductive metal stick 7 Bottom end connected by the cathode of cathode wire and electrolysis power, 7 top of conductive metal stick is fixedly installed graphite pallet 6, stone Black crucible 4 is fixed at 6 top of graphite pallet and black-fead crucible 4 is located at 1 middle part of furnace body, and the inner sidewall of black-fead crucible 4 is also set It is equipped with fire resistant heat preserving liner 12, the setting of liquid metal cathode 11 is arranged in 4 bottom of black-fead crucible, fused salt 13 in liquid metal cathode In the black-fead crucible 4 on 11 tops, the cavity between 1 bottom wall of 4 bottom wall of black-fead crucible and furnace body is inert gas cavity I 9,1 bottom of furnace body Wall is provided with the air inlet 10 being connected to inert gas cavity I 9, and the cavity between fused salt 13 and bell 21 is inert gas cavity II 19, graphite anode 5 is immersed in the center on 13 top of fused salt, and the top of graphite anode 5 is connect with positive wire 17, positive wire 17 Across the anode of the external electrolysis power of bell 21;Feed opening 16, gas vent 20 are arranged on bell 21, feed opening 16, exhaust Hole 20 is connected to in furnace body 1;
Further, 21 center of bell is additionally provided with positive wire insertion hole 18, and positive wire 17 is led across anode The anode of the external electrolysis power of line pluging handhole 18;
Further, the fused salt electrolysis apparatus further includes charging sealing-plug, positive wire insertion hole sealing-plug, is fed close Blocking, positive wire insertion hole sealing-plug are sealed with feed opening 16, the positive wire insertion cooperation of hole 18 respectively.
Further, the fused salt electrolysis apparatus further includes protecting tube 14 and thermocouple digital display thermometer 15, heat Galvanic couple protection pipe 14 is vertically arranged on bell 21, and protecting tube 14 passes through bell 21 and extended in fused salt 13 down, Thermocouple digital display thermometer 15 is arranged in protecting tube 14 and the probe of thermocouple digital display thermometer 15 is located at thermocouple The lower part of protection pipe 14;
Further, the protecting tube 14 is quartz ampoule or alundum tube;
Further, the black-fead crucible 4 is cylindrical structure, and fire resistant heat preserving liner 12 includes that corundum round tube and cement are filled out Layer is filled, corundum round tube is arranged in black-fead crucible 4, and cement filled layer is arranged between 4 inner wall of alundum tube and black-fead crucible;
Further, the refractory insulating layer 3 is the refractory insulating layer that electric furnace carries;
The liquid metal cathode 11 is the metal bath of indium or tin;
The fused salt 13 is according to lithium chloride and potassium chloride eutectic point, lithium chloride and chlorine disclosed in FactSage database Changing the molar ratio that potassium eutectic point is lithium chloride and potassium chloride is 58.2:41.8;
4 inner sidewall of black-fead crucible is provided with fire resistant heat preserving liner 12 in the utility model, makes the side wall of its black-fead crucible 4 not Conduction, the liquid metal cathode of 4 bottom of black-fead crucible only pass through the bottom wall of black-fead crucible 4, graphite pallet, conductive metal stick and yin Polar conductor electrical connection;
The application method of the utility model:
(1) alundum tube is inserted into graphite crucible 4, then between graphite crucible 4 and alundum tube filling concrete formed it is resistance to Fiery insulating lining;
(2) conductive metal stick 7 is fixed on to the bottom wall of furnace body 1 vertically, graphite pallet 6 is fixed on the top of conductive metal stick 7 End;The graphite crucible 4 of step (1) is placed on graphite pallet 6;Liquid metal cathode 11 is sequentially added in graphite crucible 4 With fused salt 13;
(3) positive wire that the positive wire of graphite anode passes through bell is inserted into hole, and hole is inserted into using positive wire Sealing-plug is fixed and seals, and the lower end of protecting tube 14 is passed through bell and is fixed on bell vertically, then will Bell is placed on furnace body, and thermocouple digital display thermometer 15 is put into protecting tube 14;
(4) ITO raw material 8 is added to by fused salt 13 by the feed opening on bell, using charging sealing-plug to feed opening into Row sealing;
(5) be passed through inert gas (nitrogen or helium) from air inlet 10, inert gas in inert gas cavity I 9 (nitrogen or Helium) gap between furnace body 1 and graphite crucible 4 enters in inert gas cavity II 19, and drain the intracorporal air of furnace;
(6) fused salt in graphite crucible is heated by furnace intracorporal resistive heater, thermocouple digital display thermometer 15 is examined It measures when temperature of molten salt reaches 450 DEG C and is kept the temperature, and molten-salt electrolysis is carried out to graphite anode and liquid metal cathode making alive, Indium metal is gathered in the liquid metal electrode of bottom.
Inert gas (nitrogen or helium) can protect indium metal not oxidized;
The utility model has the beneficial effects that
(1) the utility model can increase cell reaction contact area using liquid metal cathode, and electrolytic production of metals is direct Into liquid metal cathode, ITO powder surface will not be wrapped in and hinder reaction;
(2) device of the utility model is for restoring ITO powder recycling indium metal in whole process safety and environmental protection, without harmful gas Body and harmful waste water generate;
(3) inert gas air inlet and inert gas tap being arranged in the utility model can make cell reaction in indifferent gas Body protection is lower to be carried out, and be can effectively prevent indium and is oxidized;
(4) the utility model device is simple, cheap.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the fused salt electrolysis apparatus that ITO is reduced to indium metal by embodiment;
Wherein: 1- furnace body, 2- resistive heater, 3- refractory insulating layer, 4- black-fead crucible, 5- graphite anode, 6- graphite support Disk, 7- conductive metal stick, 8-ITO raw material, 9- inert gas cavity I, 10- air inlet, 11- liquid metal cathode, 12- fire resistant heat preserving Liner, 13- fused salt, 14- protecting tube, 15- thermocouple digital display thermometer, 16- feed opening, 17- positive wire, 18- sun Polar conductor is inserted into hole, 19- inert gas cavity II, 20- gas vent, 21- bell.
Specific embodiment
With reference to embodiment, the utility model is described in further detail.
Embodiment 1: as shown in Figure 1, a kind of fused salt electrolysis apparatus that ITO is reduced to indium metal, including furnace body 1, heating Resistance wire 2, refractory insulating layer 3, black-fead crucible 4, graphite anode 5, graphite pallet 6, conductive metal stick 7, inert gas cavity I 9, into Stomata 10, liquid metal cathode 11, fused salt 13, feed opening 16, inert gas cavity II 19, bell 21, gas vent 20, bell 21 are set It sets on 1 top of furnace body, 1 inner wall of furnace body is provided with refractory insulating layer 3, and several layers heating is evenly arranged with inside refractory insulating layer 3 Resistance wire 2, the external heating power supply of resistive heater 2,1 bottom wall of furnace body middle part are vertically arranged with the conductive gold across 1 bottom wall of furnace body Belong to stick 7, the bottom end of conductive metal stick 7 is connected by the cathode of cathode wire and electrolysis power, and the fixation of 7 top of conductive metal stick is set It is equipped with graphite pallet 6, black-fead crucible 4 is fixed at 6 top of graphite pallet and black-fead crucible 4 is located at 1 middle part of furnace body, graphite earthenware The inner sidewall of pot 4 is additionally provided with fire resistant heat preserving liner 12, and liquid metal cathode 11 is arranged in 4 bottom of black-fead crucible, and fused salt 13 is set It sets in the black-fead crucible 4 on 11 top of liquid metal cathode, the cavity between 1 bottom wall of 4 bottom wall of black-fead crucible and furnace body is inertia Air chamber I 9,1 bottom wall of furnace body are provided with the air inlet 10 being connected to inert gas cavity I 9, the cavity between fused salt 13 and bell 21 For inert gas cavity II 19, graphite anode 5 is immersed in the center on 13 top of fused salt, the top of graphite anode 5 and positive wire 17 Connection, positive wire 17 pass through the anode of the external electrolysis power of bell 21;Feed opening 16, gas vent 20 are arranged at bell 21 On, feed opening 16, gas vent 20 are connected to in furnace body 1;
21 center of bell described in the present embodiment is additionally provided with positive wire insertion hole 18, and positive wire 17 passes through positive wire It is inserted into the anode of the external electrolysis power in hole 18;
Fused salt electrolysis apparatus described in the present embodiment further includes charging sealing-plug, positive wire insertion hole sealing-plug, is fed close Blocking, positive wire insertion hole sealing-plug are sealed with feed opening 16, the positive wire insertion cooperation of hole 18 respectively;
Fused salt electrolysis apparatus described in the present embodiment further includes protecting tube 14 and thermocouple digital display thermometer 15, thermoelectricity Even protection pipe 14 is vertically arranged on bell 21, and protecting tube 14 passes through bell 21 and extended in fused salt 13 down, heat Galvanic couple digital display thermometer 15 is arranged in protecting tube 14 and the probe of thermocouple digital display thermometer 15 is located at thermocouple guarantor The lower part of pillar 14;
Protecting tube 14 described in the present embodiment is quartz ampoule, can also use alundum tube;
Black-fead crucible 4 described in the present embodiment is cylindrical structure, and fire resistant heat preserving liner 12 includes that corundum round tube and cement are filled out Layer is filled, corundum round tube is arranged in black-fead crucible 4, and cement filled layer is arranged between 4 inner wall of alundum tube and black-fead crucible;
Refractory insulating layer 3 described in the present embodiment is the refractory insulating layer that electric furnace carries;
Liquid metal cathode 11 described in the present embodiment is the metal bath of indium, can also use the metal bath of tin;
Fused salt 13 described in the present embodiment is according to lithium chloride and potassium chloride eutectic point disclosed in FactSage database, chlorine Changing the molar ratio that lithium and potassium chloride eutectic point are lithium chloride and potassium chloride is 58.2:41.8;
4 inner sidewall of black-fead crucible is provided with fire resistant heat preserving liner 12 in the present embodiment, leads the side wall of its black-fead crucible 4 not Electricity, the liquid metal cathode of 4 bottom of black-fead crucible only pass through the bottom wall of black-fead crucible 4, graphite pallet, conductive metal stick and cathode Conducting wire electrical connection;
ITO is reduced to the application method of the fused salt electrolysis apparatus of indium metal by the present embodiment:
(1) alundum tube is inserted into graphite crucible 4, then between graphite crucible 4 and alundum tube filling concrete formed it is resistance to Fiery insulating lining;
(2) conductive metal stick 7 is fixed on to the bottom wall of furnace body 1 vertically, graphite pallet 6 is fixed on the top of conductive metal stick 7 End;The graphite crucible 4 of step (1) is placed on graphite pallet 6;Liquid metal cathode 11 is sequentially added in graphite crucible 4 (metal bath of indium) and fused salt 13 be lithium chloride and potassium chloride eutectic point (molar ratio of lithium chloride and potassium chloride is 58.2: 41.8);
(3) positive wire that the positive wire of graphite anode passes through bell is inserted into hole, and hole is inserted into using positive wire Sealing-plug is fixed and seals, and the lower end of protecting tube 14 is passed through bell and is fixed on bell vertically, then will Bell is placed on furnace body, and thermocouple digital display thermometer 15 is put into protecting tube 14;
(4) ITO raw material 8 is added in fused salt 13 by the feed opening on bell, using charging sealing-plug to feed opening It is sealed;
(5) be passed through inert gas (nitrogen or helium) from air inlet 10, inert gas in inert gas cavity I 9 (nitrogen or Helium) gap between furnace body 1 and graphite crucible 4 enters in inert gas cavity II 19, and drain the intracorporal air of furnace;
(6) fused salt in graphite crucible is heated by furnace intracorporal resistive heater, thermocouple digital display thermometer 15 is examined It measures when temperature of molten salt reaches 450 DEG C and is kept the temperature, and molten-salt electrolysis is carried out to graphite anode and liquid metal cathode making alive, Indium metal is gathered in the liquid metal electrode of bottom.
Specific embodiment of the utility model is explained in detail above in conjunction with attached drawing, but the utility model and unlimited In above-described embodiment, within the knowledge of a person skilled in the art, the utility model can also not departed from Various changes can be made under the premise of objective.

Claims (6)

1. a kind of fused salt electrolysis apparatus that ITO is reduced to indium metal, it is characterised in that: including furnace body (1), resistive heater (2), refractory insulating layer (3), black-fead crucible (4), graphite anode (5), graphite pallet (6), conductive metal stick (7), inert gas Chamber I (9), air inlet (10), liquid metal cathode (11), fused salt (13), feed opening (16), inert gas cavity II (19), bell (21), gas vent (20), bell (21) are arranged on furnace body (1) top, and furnace body (1) inner wall is provided with refractory insulating layer (3), fire resisting It is evenly arranged with several layers resistive heater (2) inside insulating layer (3), resistive heater (2) external heating power supply, furnace body (1) It is vertically arranged with the conductive metal stick (7) across furnace body (1) bottom wall in the middle part of bottom wall, the bottom end of conductive metal stick (7) passes through cathode The connection of the cathode of conducting wire and electrolysis power, conductive metal stick (7) top are fixedly installed graphite pallet (6), and black-fead crucible (4) is solid Fixed setting is on graphite pallet (6) top and black-fead crucible (4) is located at furnace body (1) middle part, and the inner sidewall of black-fead crucible (4) is also set up Have fire resistant heat preserving liner (12), liquid metal cathode (11) setting is in black-fead crucible (4) bottom, and fused salt (13) setting is in liquid gold In the black-fead crucible (4) for belonging to cathode (11) top, the cavity between black-fead crucible (4) bottom wall and furnace body (1) bottom wall is indifferent gas Body cavity I (9), furnace body (1) bottom wall are provided with the air inlet (10) being connected to inert gas cavity I (9), fused salt (13) and bell (21) Between cavity be inert gas cavity II (19), graphite anode (5) is immersed in the center on fused salt (13) top, graphite anode (5) Top connect with positive wire (17), positive wire (17) pass through bell (21) external electrolysis power anode;Feed opening (16), gas vent (20) is arranged on bell (21), feed opening (16), gas vent (20) with furnace body (1) in be connected to.
2. ITO to be reduced to the fused salt electrolysis apparatus of indium metal according to claim 1, it is characterised in that: in bell (21) The heart is additionally provided with positive wire insertion hole (18), and positive wire (17) passes through positive wire insertion hole (18) external electrolysis power Anode.
3. ITO to be reduced to the fused salt electrolysis apparatus of indium metal according to claim 2, it is characterised in that: further include charging Sealing-plug, positive wire be inserted into hole sealing-plug, charging sealing-plug, positive wire insertion hole sealing-plug respectively with feed opening (16), Positive wire is inserted into hole (18) cooperation sealing.
4. ITO to be reduced to the fused salt electrolysis apparatus of indium metal according to claim 1, it is characterised in that: further include thermoelectricity Even protection pipe (14) and thermocouple digital display thermometer (15), protecting tube (14) are vertically arranged on bell (21), thermoelectricity Even protection pipe (14) passes through bell (21) and is extended in fused salt (13) down, and thermocouple digital display thermometer (15) is arranged in thermoelectricity In even protection pipe (14) and the probe of thermocouple digital display thermometer (15) is located at the lower part of protecting tube (14).
5. ITO to be reduced to the fused salt electrolysis apparatus of indium metal according to claim 4, it is characterised in that: thermocouple protection Managing (14) is quartz ampoule or alundum tube.
6. ITO to be reduced to the fused salt electrolysis apparatus of indium metal according to claim 1, it is characterised in that: black-fead crucible (4) For cylindrical structure, fire resistant heat preserving liner (12) includes corundum round tube and cement filled layer, and corundum round tube is arranged in black-fead crucible (4) in, cement filled layer is set between alundum tube and black-fead crucible (4) inner wall.
CN201820849201.2U 2018-06-04 2018-06-04 A kind of fused salt electrolysis apparatus that ITO is reduced to indium metal Expired - Fee Related CN208532947U (en)

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CN201820849201.2U CN208532947U (en) 2018-06-04 2018-06-04 A kind of fused salt electrolysis apparatus that ITO is reduced to indium metal

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110760893A (en) * 2019-11-22 2020-02-07 龙南龙钇重稀土科技股份有限公司 Continuous suspension type electrolysis device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110760893A (en) * 2019-11-22 2020-02-07 龙南龙钇重稀土科技股份有限公司 Continuous suspension type electrolysis device

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Granted publication date: 20190222