CN1308466C - Production method of zinc indium by pressurized acid leaching neutralization precipitation separation indium from indium containing high iron zinc sulfide concentrate - Google Patents
Production method of zinc indium by pressurized acid leaching neutralization precipitation separation indium from indium containing high iron zinc sulfide concentrate Download PDFInfo
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 229910052738 indium Inorganic materials 0.000 title claims abstract description 104
- 239000012141 concentrate Substances 0.000 title claims abstract description 44
- 238000002386 leaching Methods 0.000 title claims abstract description 43
- 238000001556 precipitation Methods 0.000 title claims abstract description 22
- 239000002253 acid Substances 0.000 title claims abstract description 19
- 238000006386 neutralization reaction Methods 0.000 title claims abstract 9
- NJWNEWQMQCGRDO-UHFFFAOYSA-N indium zinc Chemical compound [Zn].[In] NJWNEWQMQCGRDO-UHFFFAOYSA-N 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000926 separation method Methods 0.000 title abstract description 3
- HKDQPTUHUPLYTG-UHFFFAOYSA-N zinc iron(2+) disulfide Chemical compound [Fe+2].[S-2].[Zn+2].[S-2] HKDQPTUHUPLYTG-UHFFFAOYSA-N 0.000 title 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 43
- 239000011701 zinc Substances 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000005083 Zinc sulfide Substances 0.000 claims abstract description 35
- 229910052984 zinc sulfide Inorganic materials 0.000 claims abstract description 35
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 27
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 23
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 11
- 238000000605 extraction Methods 0.000 claims description 11
- 239000012074 organic phase Substances 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000003350 kerosene Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 238000004070 electrodeposition Methods 0.000 claims 2
- 238000009854 hydrometallurgy Methods 0.000 claims 1
- 239000003978 infusion fluid Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 claims 1
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 239000001117 sulphuric acid Substances 0.000 claims 1
- 238000005363 electrowinning Methods 0.000 abstract description 11
- 238000003723 Smelting Methods 0.000 abstract description 8
- 238000005266 casting Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 229910052598 goethite Inorganic materials 0.000 description 3
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
Classifications
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
本发明属于含铟硫化锌精矿的冶炼方法，该方法通过将含铟高铁硫化锌精矿磨细处理后，与锌电积废液调浆，进入加压釜中直接进行酸浸，在实现锌浸出率99%以上的同时，铟浸出率达92%以上，然后用中和沉淀的办法分离浸出液中95%以上的铟，从而使铟从锌精矿到海绵铟的回收率达80%以上；分离铟之后的浸出液，采用传统湿法炼锌工艺中除铁、溶液净化、电积、熔铸等工序，即可产出金属锌。用本方法可使工艺简化，铟、锌回收率高，高效地处理高铟复杂锌精矿。
The invention belongs to the smelting method of indium-containing zinc sulfide concentrate. In the method, after the indium-containing high-iron zinc sulfide concentrate is ground and treated, it is mixed with zinc electrowinning waste liquid and put into a pressurized kettle for direct acid leaching. While the zinc leaching rate is over 99%, the indium leaching rate is over 92%, and then the method of neutralization and precipitation is used to separate over 95% of indium in the leaching solution, so that the recovery rate of indium from zinc concentrate to sponge indium can reach over 80%. ; The leaching solution after the separation of indium can be used to produce metal zinc by adopting the processes of iron removal, solution purification, electrowinning, and melting and casting in the traditional wet zinc smelting process. The process can be simplified by using the method, the recovery rate of indium and zinc is high, and the complex zinc concentrate with high indium can be processed efficiently.
Description
技术领域technical field
本发明属于含铟硫化锌精矿的冶炼方法，更具体地说，涉及一种从含铟高铁硫化锌精矿中提取锌铟的冶炼方法。The invention belongs to the smelting method of indium-containing zinc sulfide concentrate, and more specifically relates to a smelting method for extracting zinc indium from indium-containing high-iron zinc sulfide concentrate.
背景技术Background technique
含铟高铁硫化锌精矿是指含铁在10％以上、含锌低于48％、并伴生有较高稀散金属铟、在选矿过程中无法将铁脱除的一类硫化锌精矿的总称。目前，对于含铟高铁硫化锌精矿这类物料的处理，通常采用传统的“沸腾焙烧-焙砂高温高酸浸出”工艺，铟从铁矾渣或中和渣中回收，高铁硫化锌精矿在焙烧过程中产生的二氧化硫烟气经过制酸回收，但在硫酸供应过剩地区，特别是无耗酸工业地区和交通欠发达地区，由焙烧硫化锌精矿产生的二氧化硫烟气回收的硫酸，受到硫酸市场的严重影响，致使硫酸难以有效利用。因此，“焙烧-浸出”炼锌工艺存在很大的局限性。Indium-containing high-iron zinc sulfide concentrate refers to the general term for a type of zinc sulfide concentrate that contains more than 10% iron, less than 48% zinc, and is associated with relatively high scattered metal indium, and cannot remove iron during the beneficiation process. . At present, for the treatment of materials such as indium-containing high-iron zinc sulfide concentrate, the traditional "boiling roasting-calcined high-temperature and high-acid leaching" process is usually adopted. The flue gas of sulfur dioxide produced during the roasting process is recovered through acid production, but in areas with excess supply of sulfuric acid, especially areas without acid-consuming industries and areas with underdeveloped transportation, the sulfuric acid recovered from flue gas of sulfur dioxide produced by roasting zinc sulfide concentrates is subject to The serious impact on the sulfuric acid market has made it difficult to effectively use sulfuric acid. Therefore, the "roasting-leaching" zinc smelting process has great limitations.
此外，已开发的“加压酸浸-浸出液直接萃取分离铟处理含铟高铁硫化锌精矿提取金属锌铟”的工艺技术，该工艺存在萃取铟溶液温度高、溶液处理量大等缺陷。In addition, the developed process technology of "pressurized acid leaching - direct extraction and separation of indium from leaching solution to process indium-containing high-iron zinc sulfide concentrate to extract metal zinc indium" has defects such as high temperature of extraction indium solution and large solution processing capacity.
发明内容Contents of the invention
本发明克服了现有锌精矿冶炼方法的不足，提供了一种冶炼过程不产生二氧化硫气体、萃取铟溶液体积大为减少的含铟高铁硫化锌精矿冶炼方法。The invention overcomes the disadvantages of the existing zinc concentrate smelting method, and provides a smelting method of indium-containing high-iron zinc sulfide concentrate which does not generate sulfur dioxide gas in the smelting process and greatly reduces the volume of the extracted indium solution.
实现本发明的步骤是：(1)将细磨过的含铟高铁硫化锌精矿与含硫酸140g/L～170g/L锌电积废液调浆，然后加入加压釜中，控制温度140℃～160℃，压力1.0MPa～1.6MPa，直接进行通氧气酸浸，精矿中的锌、铟、铜、镉等有价金属同时高效浸出，而硫、铅、银等则留在渣中；(2)加压浸出产出的浸出溶液，用硫化锌精矿在85℃～90℃下还原处理后，进行中和沉淀铟；(3)沉淀铟渣用硫酸溶液溶解，用P204与煤油组成的有机相萃取铟，然后从负载有机相中反萃铟，再用锌片从反萃铟水溶液中置换得到海绵铟；(4)沉淀分离铟之后的浸出液，采用湿法炼锌工艺中除铁、溶液净化、电积、熔铸工序，产出金属锌。其中：含铟高铁硫化锌精矿含铟在0.025％～0.09％，含铁10％～25％，含锌38％～48％。加压酸浸为一段或两段加压浸出方法。The steps for realizing the present invention are: (1) mixing the finely ground indium-containing high-iron zinc sulfide concentrate with sulfuric acid 140g/L～170g/L zinc electrowinning waste liquid, then adding it to the autoclave, and controlling the temperature to 140 ℃～160℃, pressure 1.0MPa～1.6MPa, direct oxygen acid leaching, zinc, indium, copper, cadmium and other valuable metals in the concentrate are leached efficiently at the same time, while sulfur, lead, silver, etc. are left in the slag ; (2) The leaching solution produced by pressure leaching, after reduction treatment with zinc sulfide concentrate at 85 ° C to 90 ° C, neutralizes and precipitates indium; (3) dissolves the precipitated indium residue with sulfuric acid solution, and uses P204 and kerosene The indium is extracted from the organic phase, and then the indium is stripped from the loaded organic phase, and then the indium sponge is replaced by the zinc sheet from the stripped indium aqueous solution; Iron, solution purification, electrowinning, and casting processes produce metallic zinc. Among them: indium-containing high-iron zinc sulfide concentrate contains 0.025% to 0.09% indium, 10% to 25% iron, and 38% to 48% zinc. Pressure acid leaching is a one-stage or two-stage pressure leaching method.
本发明的有益效果为：因含铟高铁硫化锌矿直接进入加压釜进行通氧气酸浸，浸出温度高，用锌电积废液中的硫酸直接浸出精矿中的锌、铟，将现行“焙烧-浸出”工艺中的焙烧、收尘、浸出集中在加压浸出过程中完成，使工艺简化，过程强化，实现含铟硫化锌精矿的高效直接浸出；同时，精矿中的硫转化为元素硫，经浮选、热熔过滤等成熟工艺处理后，得到便于储存和运输的硫磺产品，因此主体工艺不受硫酸市场及交通运输的影响。浸出溶液经中和沉淀分离铟，沉铟渣反溶与萃取，萃取溶液处理量大大减少，降低了生产成本。The beneficial effect of the present invention is: because the indium-containing high-iron zinc sulfide ore directly enters the pressurized kettle for oxygen acid leaching, the leaching temperature is high, and the zinc and indium in the concentrate are directly leached with sulfuric acid in the zinc electrowinning waste liquid, and the existing The roasting, dust collection and leaching in the "roasting-leaching" process are concentrated in the pressure leaching process, which simplifies the process and intensifies the process, and realizes the efficient direct leaching of indium-containing zinc sulfide concentrate; at the same time, the sulfur in the concentrate is converted It is elemental sulfur, which is processed by mature processes such as flotation and hot-melt filtration to obtain sulfur products that are easy to store and transport, so the main process is not affected by the sulfuric acid market and transportation. The leaching solution is neutralized and precipitated to separate indium, and the precipitated indium slag is reverse-dissolved and extracted, so that the processing amount of the extraction solution is greatly reduced, and the production cost is reduced.
附图说明：附图为本发明的工艺流程图。Description of drawings: accompanying drawing is a process flow diagram of the present invention.
具体实施例specific embodiment
实施例1、含铟高铁硫化锌精矿的含铁量10％，含铟0.025％，锌38.0％，精矿磨细，98％过0.043mm筛。Example 1. Indium-containing high-iron zinc sulfide concentrate contains 10% iron, 0.025% indium, and 38.0% zinc. The concentrate is finely ground, and 98% passes through a 0.043mm sieve.
将磨细过的含铟高铁硫化锌精矿与锌电积废液调浆，加入容积为4L、由钛材制成的耐酸加压釜中，温度140℃、压力1.0MPa进行一段连续通氧气浸出。Slurry the finely ground indium-containing high-iron zinc sulfide concentrate and zinc electrowinning waste liquid, put it into an acid-resistant autoclave made of titanium with a volume of 4L, and carry out a period of continuous oxygen flow at a temperature of 140°C and a pressure of 1.0MPa leach.
锌浸出率99.28％、铟浸出率94.43％、硫的转化率78.38％，浸出液含锌114.0g/L，含铟42.92mg/L。浸出渣含锌0.67％，元素硫53.88％。The zinc leaching rate is 99.28%, the indium leaching rate is 94.43%, and the sulfur conversion rate is 78.38%. The leaching solution contains 114.0g/L of zinc and 42.92mg/L of indium. The leaching slag contains 0.67% zinc and 53.88% elemental sulfur.
浸出液加硫化锌精矿在85℃下还原90min，然后加入石灰石粉中和，铟沉淀率95.68％，得到沉铟渣In0.214％，沉铟渣用硫酸溶解，铟溶出率97.92％，溶液含In0.415g/L、Fe1.01g/L，用20％P2O4与80％煤油组成的有机相3级逆流萃取铟，铟萃取率98.49％；负载有机相用3molHCl+2molZnCl2溶液进行两级反萃，铟反萃率为99.41％；用锌片从反萃铟水溶液中置换出海绵铟。Add zinc sulfide concentrate to the leaching solution and reduce at 85°C for 90 minutes, then add limestone powder to neutralize, the indium precipitation rate is 95.68%, and the indium precipitation residue In0.214% is obtained. The indium precipitation residue is dissolved with sulfuric acid, and the indium dissolution rate is 97.92%. The solution contains In0.415g/L, Fe1.01g/L, use 20% P2O4 and 80% kerosene organic phase three-stage countercurrent extraction of indium, the extraction rate of indium is 98.49%; the loaded organic phase is carried out two-stage stripping with 3molHCl+ 2molZnCl2 solution , the indium stripping rate is 99.41%; the sponge indium is replaced by the zinc sheet from the stripped indium aqueous solution.
沉铟后液采用针铁矿法除铁，铁渣含锌2.0％。除铁后液分别进行净化、电积、熔铸，得到1#锌锭。The goethite method was used to remove iron from the solution after indium precipitation, and the iron slag contained 2.0% zinc. After iron removal, the solution was purified, electrowinning, and melted and casted to obtain 1 # zinc ingot.
实施例2、含铟高铁硫化锌精矿的含铁量18％，含铟0.042％，锌40％，精矿磨细，99.0％过0.043mm筛。Example 2. The indium-containing high-iron zinc sulfide concentrate has an iron content of 18%, an indium content of 0.042%, and a zinc content of 40%. The concentrate is finely ground, and 99.0% passes through a 0.043mm sieve.
将磨细过的含铟高铁硫化锌精矿与锌电积废液调浆，加入4L钛材加压釜中，温度150℃、压力1.4MPa进行一段连续通氧气浸出。Slurry the finely ground indium-containing high-iron zinc sulfide concentrate and zinc electrowinning waste liquid, put it into a 4L titanium autoclave, and carry out one-stage continuous oxygen leaching at a temperature of 150°C and a pressure of 1.4MPa.
锌浸出率99.79％、铟浸出率98.02％、硫的转化率81.98％，浸出液含锌132g/L，含铟62.44mg/L。浸出渣含锌0.87％，元素硫55.23％。The zinc leaching rate is 99.79%, the indium leaching rate is 98.02%, and the sulfur conversion rate is 81.98%. The leaching solution contains 132g/L of zinc and 62.44mg/L of indium. The leaching slag contains 0.87% zinc and 55.23% elemental sulfur.
浸出液加硫化锌精矿在90℃下还原90min，然后加入石灰石粉中和，铟沉淀率98.76％，得到沉铟渣In0.617％，沉铟渣用硫酸溶解，铟溶出率96.89％，溶液含In0.627g/L、Fe2.91g/L，用20％P2O4与80％煤油组成的有机相3级逆流萃取铟，铟萃取率98.91％；负载有机相用3molHCl+2molZnCl2溶液进行两级反萃，铟反萃率为99.25％；用锌片从反萃铟水溶液中置换出海绵铟。Add zinc sulfide concentrate to the leaching solution and reduce at 90°C for 90 minutes, then add limestone powder to neutralize, the indium precipitation rate is 98.76%, and the indium precipitation residue In0.617% is obtained. The indium precipitation residue is dissolved with sulfuric acid, and the indium dissolution rate is 96.89%. The solution contains In0.627g/L, Fe2.91g/L, using 20% P2O4 and 80% kerosene organic phase three-stage countercurrent extraction of indium, the extraction rate of indium is 98.91%; the loaded organic phase is carried out two-stage stripping with 3molHCl+2molZnCl2 solution , the indium stripping rate is 99.25%; the sponge indium is replaced by the zinc sheet from the stripped indium aqueous solution.
沉铟后液采用针铁矿法除铁，铁渣含锌2.93％。除铁后液分别进行净化、电积、熔铸，得到1#锌锭。The goethite method was used to remove iron from the solution after indium precipitation, and the iron slag contained 2.93% zinc. After iron removal, the solution was purified, electrowinning, and melted and casted to obtain 1 # zinc ingot.
实施例3、含铟高铁硫化锌精矿的含铁量25％，含铟0.09％，锌48％，精矿磨细，98.5％过0.043mm筛。Example 3, the indium-containing high-iron zinc sulfide concentrate contains 25% iron, 0.09% indium, and 48% zinc. The concentrate is finely ground, and 98.5% passes through a 0.043mm sieve.
将磨细过的含铟高铁硫化锌精矿与锌电积废液调浆，加入容积为4L、由钛材制成的耐酸加压釜中，温度160℃、压力1.6MPa进行两段连续通氧气浸出。Slurry the finely ground indium-containing high-iron zinc sulfide concentrate and zinc electrowinning waste liquid into an acid-resistant autoclave made of titanium with a volume of 4L, and carry out two-stage continuous passage at a temperature of 160°C and a pressure of 1.6MPa. Oxygen leaching.
锌浸出率99.48％、铟浸出率98.21％、硫的转化率79.62％，浸出液含锌141g/L，含铟55.63mg/L。浸出渣含锌1.02％，元素硫52.42％。The zinc leaching rate is 99.48%, the indium leaching rate is 98.21%, and the sulfur conversion rate is 79.62%. The leaching solution contains 141g/L of zinc and 55.63mg/L of indium. The leaching slag contains 1.02% zinc and 52.42% elemental sulfur.
浸出液加硫化锌精矿在95℃下还原90min，然后加入石灰石粉中和，铟沉淀率97.91％，得到沉铟渣In0.511％，沉铟渣用硫酸溶解，铟溶出率97.23％，溶液含In0.564g/L、Fe3.49g/L，用20％P2O4与80％煤油组成的有机相3级逆流萃取铟，铟萃取率98.23％；负载有机相用3molHCl+2molZnCl2溶液进行两级反萃，铟反萃率为99.45％；用锌片从反萃铟水溶液中置换出海绵铟。Add zinc sulfide concentrate to the leaching solution and reduce at 95°C for 90 minutes, then add limestone powder to neutralize, the indium precipitation rate is 97.91%, and the indium precipitation residue In0.511% is obtained. The indium precipitation residue is dissolved with sulfuric acid, and the indium dissolution rate is 97.23%. The solution contains In0.564g/L, Fe3.49g/L, using 20% P2O4 and 80% kerosene organic phase three-stage countercurrent extraction of indium, the extraction rate of indium is 98.23%; the loaded organic phase is carried out two-stage stripping with 3molHCl+ 2molZnCl2 solution , the indium stripping rate is 99.45%; the sponge indium is replaced by the zinc sheet from the stripped indium aqueous solution.
沉铟后液采用针铁矿法除铁，铁渣含锌3.01％。除铁后液分别进行净化、电积、熔铸，得到1#锌锭。The goethite method was used to remove iron from the solution after indium precipitation, and the iron slag contained 3.01% zinc. After iron removal, the solution was purified, electrowinning, and melted and casted to obtain 1 # zinc ingot.
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| CN101798639B (en) * | 2009-12-16 | 2011-06-08 | 株洲冶炼集团股份有限公司 | Method for recovering indium from indium-containing neutralized dregs directly leached from zinc concentrate |
| CN102134654A (en) * | 2010-01-21 | 2011-07-27 | 云南冶金集团股份有限公司 | Treatment method of zinc sulfide ore concentrates |
| CN102051489A (en) * | 2011-01-14 | 2011-05-11 | 上海大学 | Method for recycling indium from acid pressure oxidative leaching liquid of zinc smelting product |
| CN102747233B (en) * | 2012-07-18 | 2014-01-22 | 昆明冶金研究院 | Sulfur concentrate recovery process in pre-cavitation and sulfur flotation of zinc oxidative pressure leaching residue |
| CN102766765B (en) * | 2012-08-07 | 2014-12-24 | 四川四环电锌有限公司 | Zinc oxide powder recycling method |
| CN102787241B (en) * | 2012-09-10 | 2013-08-21 | 云南东昌金属加工有限公司 | Method for extracting and recycling indium from chlorination distillation residue liquid generated after germanium extraction of germanium ore concentrate |
| CN103194599A (en) * | 2013-04-25 | 2013-07-10 | 大兴安岭云冶矿业开发有限公司 | Method for processing zinc sulfide concentrated ore |
| CN103866120B (en) * | 2014-03-25 | 2016-03-16 | 长沙有色冶金设计研究院有限公司 | Zinc sulfide concentrates pressurised oxygen Leaching Zinc reclaims the method for valuable metal simultaneously |
| CN104451206A (en) * | 2014-12-13 | 2015-03-25 | 株洲冶炼集团股份有限公司 | Process for increasing reclamation rate of indium in zinc concentrate |
| CN105886797A (en) * | 2015-01-25 | 2016-08-24 | 昆明冶金高等专科学校 | Method for preparing sponge indium from polymetallic sulfide material |
| CN105002354A (en) * | 2015-07-28 | 2015-10-28 | 昆明理工大学 | Method for leaching zinc and other valuable metal in zinc sulfide ore through medium-and-low-pressure oxygen enrichment |
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