Method for treating indium stannum smoke raw material

A treatment method and raw material technology, applied in the field of indium tin fume raw material treatment, to achieve the effect of effective method, simple operation and effective separation

Inactive Publication Date: 2008-11-19
YUNNAN TIN GROUP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above methods is the best way to deal with raw materials containing indium, tin, zinc and chlorine fumes

Method used

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  • Method for treating indium stannum smoke raw material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] A batch of indium-containing electric furnace smelting dust, containing 0.49% indium, 16.28% zinc, 19.57% tin, and 47.5% chlorine, was leached with water at normal temperature and pressure, the liquid-solid ratio was 4:1, and the leaching time was 10 minutes. The same conditions were used for the second time. After leaching, filtering, and drying the filter residue, it contains 0.702% indium, 21.4% zinc, 32.93% tin, and 0.85% chlorine; the filtrate indium is less than 0.01 g / L. Take 1000 grams of the above-mentioned dechlorinated materials (7.02 grams of indium, 329 grams of tin, and 214 grams of zinc) and add them to a pressure titanium kettle, add 4 liters of sulfuric acid with a concentration of 20%, and heat and pressure leaching with oxygen at a temperature of 160-170 ℃, the pressure in the kettle is 0.7-0.8MPa, the leaching reaction time is 3 hours, filter after leaching, add 4 liters of water to wash twice, filter, dry, weigh, the residue weight is 750 grams, samp...

Embodiment 2

[0020] A batch of indium-containing electric furnace smelting fumes, the raw material particle size is less than 150 mesh, containing 0.60% indium, 25.00% tin, and 0.15% chlorine, take 10 kg of the above materials and put them into a pressure titanium kettle, add 40 liters of sulfuric acid with a concentration of 25%, and pass through oxygen Heating and pressure leaching, temperature 165-175 °C, pressure in the kettle 0.8-0.9 MPa, leaching reaction time 4 hours, after leaching, filter, add 10 liters of water to wash twice, filter, dry, weigh, slag weight 7 Kilogram, sample analysis, containing 0.045% indium, 35.05% tin, the calculated indium leaching rate is 94.75%, tin leaching rate is 1.02%, and zinc leaching rate is 95.09%.

Embodiment 3

[0022] A batch of indium-containing electric furnace smelting dust, containing 0.32% indium, 15.6% tin, and 18.5% chlorine, was leached with water at normal temperature and pressure, the liquid-solid ratio was 4:1, and the leaching time was 10 minutes. The same conditions were leached twice, filtered, and the filter residue After drying, it contains 0.38% indium, 22.51% tin and 0.21% chlorine; the filtrate indium is less than 0.01 g / L. Take 10 kg of the above-mentioned dechlorinated materials (38 grams of indium and 2251 grams of tin) and put them into a pressure titanium kettle, add 40 liters of sulfuric acid with a concentration of 20%, and heat and pressure leaching with oxygen at a temperature of 160-170°C. Pressure 0.9-1.0MPa, leaching reaction time 3.5 hours, filter after leaching, add 10 liters of water to wash twice, filter, dry, weigh, slag weighs 7250 grams, sample analysis, containing 0.032% indium, 43.06% tin, It is calculated that the indium leaching rate is 93.89...

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Abstract

The invention relates to a treatment method for raw materials containing indium, tin, zinc and chlorine, in particular to a method for reclaiming valuable metal aiming at producing smoke dust containing the indium and the chloride during the smelting of the zinc, lead, and the tin. The method uses water to wash and remove the chloride in smoke dust raw material, then a dechlorination material is added into a pressure titanium kettle, is added with sulphuric acid and is aerated with oxygen to perform oxygen pressure heating leaching so that the indium and the zinc are leached and enter solution, the tin is leached out and transformed into metastannic acid to sink into residue, and the filtered tin-containing filter residue is reclaimed and reused; the indium and the zinc enter the solution, extracting agent P204 is adopted to extract the indium to realize the indium-zinc separation, extraction liquid is subject to the back extraction and the zinc plate replacement to produce sponge indium, the sponge indium is electrolyzed, purified, and melted and cast to produce an indium ingot product; and remaining liquid is extracted to reclaim the zinc. The method solves the corrosion resistant problem of the prior equipment, namely the pressure titanium kettle, improves the leaching rate of the indium, deposits the tin at the same time, solves the problem of indium-tin separation, and has the characteristics of reducing energy consumption and production cost, high resource utilization rate, and environmental protection.

Description

technical field [0001] The invention relates to a method for processing raw materials containing indium, tin, zinc and chlorine, in particular to a method for recovering valuable metals from fumes containing indium and chlorine generated in the process of smelting zinc, lead and tin. Background technique [0002] At present, the raw materials for indium production mainly come from indium-containing waste materials, indium-containing by-product materials produced in the smelting of non-ferrous metals such as zinc, lead, tin, copper, and ironmaking. For such indium-containing mixed materials, due to the high chlorine content (greater than 20%), the existing equipment cannot meet the requirements of high hydrochloric acid corrosion resistance and high temperature and high pressure resistance during the acid leaching process. Therefore, the existing domestic production process is two-stage acid leaching heated at atmospheric pressure, and the leaching equipment is an acid-resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02
CPCY02P10/20
Inventor 徐勇智王维昌黄迎红
Owner YUNNAN TIN GROUP HLDG
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