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New method for soaking out enriched ores of high indium, high iron, and high sulfur zinc

A technology of zinc concentrate and a new method, which is applied in the field of full hydrometallurgical process, can solve the problems of high reaction temperature and high operating pressure, and achieve the effect of reducing equipment investment and being easy to store or transfer

Inactive Publication Date: 2007-07-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the relevant improvement work has the patented technology of Yunnan Metallurgical Group (refer to CN1664131A and CN1718782A), but these two patents are all about oxidative acid leaching in the range of 110-150°C or 140-160°C to treat high-indium, high-iron, and zinc sulfide concentrates , still has the disadvantage of high reaction temperature, and its minimum operating temperature is close to the melting point of sulfur at 119°C at 110°C; in addition, there are some unfavorable factors such as high operating pressure when operating at 140-160°C

Method used

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  • New method for soaking out enriched ores of high indium, high iron, and high sulfur zinc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: The composition (%) of zinc concentrate is: 25Zn, 26Fe, 25S, 0.90In, the concentrate is finely ground, and 90% passes through a 0.043mm sieve.

[0013] Pour 200g of ore, 0.1g of calcium lignosulfonate and one liter of aqueous solution containing 196g of sulfuric acid into a 2000ml titanium autoclave at a temperature of 95°C and an oxygen pressure of 0.2Mpa. Add the corresponding amount of gelatin solution to the standard of 200-800g gelatin per ton of ore. After filtering and washing, the oxidized leachate is obtained, in which effective metals such as zinc, indium, copper, and cadmium are leached efficiently, while sulfur, lead, etc. are left in the leaching residue.

[0014] The result of the operation is: 94m 3 / tO 2 , the yield of leaching residue is 38.8%, and the solution contains H 2 SO 4 It is 48g / L, and the reaction result is: zinc leaching rate 99%, iron leaching rate 81%, indium leaching rate 97.8%, S 0 The yield is 85%. Usually, the recover...

Embodiment 2

[0015] Embodiment 2: Zinc concentrate composition (%): 34Zn, 25Fe, 32S, 0.50In, the concentrate is finely ground, and 92% pass through a 0.043mm sieve.

[0016] Pour 200g of ore, 0.1g of calcium lignosulfonate and one liter of aqueous solution containing 184g of sulfuric acid into a 2000ml titanium autoclave at a temperature of 100°C and an oxygen pressure of 0.4Mpa. Add the corresponding amount of gelatin solution to the standard of 200-800g gelatin ore, and after filtering and washing, the oxidized leachate is obtained, in which effective metals such as zinc, indium, copper, and cadmium are leached efficiently, while sulfur, lead, etc. are left in the leaching residue.

[0017] The result of the operation is: 123m 3 / tO 2 , the yield of leaching residue is 41.0%, and the solution contains H after the reaction 2 SO 4 It is 32g / L, and the reaction result is: zinc leaching rate 97%, iron leaching rate 80%, indium leaching rate 96%, S 0 Yield 86%. During reduction operation...

Embodiment 3

[0018] Embodiment 3: The composition (%) of the zinc concentrate is: 40Zn, 13Fe, 33S, 0.046In, the concentrate is finely ground, and 96% passes through a 0.043mm sieve.

[0019] Pour 300g of ore, 0.06g of calcium lignosulfonate and one liter of aqueous solution containing 240g of sulfuric acid into a 2000ml titanium autoclave at a temperature of 100°C and an oxygen pressure of 0.3Mpa. Add the corresponding amount of gelatin solution to the standard of 200-800g gelatin ore, and after filtering and washing, the oxidized leachate is obtained, in which effective metals such as zinc, indium, copper, and cadmium are leached efficiently, while sulfur, lead, etc. are left in the leaching residue.

[0020] The result of the operation is: Oxygen consumption 94m 3 / t ore, the yield of leaching slag is 41.3%, and the solution contains H after the reaction 2 SO 4 It is 68g / L, and the reaction result is: zinc leaching rate 99%, iron leaching rate 81%, indium leaching rate 97.3%, S 0 The ...

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Abstract

This invention discloses a wet method for treating high In-Fe-S Zn concentrate by oxidative acid leaching. Compared with traditional high-pressure leaching technique, the method obviously reduces the operation temperature and pressure. Ore slurry composed of Zn concentrate, surfactant and sulfuric acid aqueous solution is operated at 95-105 deg.C under 0.2-0.4 MPa. The surfactant is sodium or calcium lignosulfonate, which can change the hydrophobicity of sulfide and sulfur, raise the leachin speed, and improve the suspension fluidity of the ore slurry. Since the operation temperature is lower than the normal pressure boiling point of the solution system, normal rubber pipe pump can be used to replace oil diaphragm high-pressure slurry pump, and Ti heat exchanger and vacuum flash evaporator are not needed. The leaching rate of Zn and In is up to 95-99%, and the yield of S is higher than 80%. The leaching solution can be treated according to normal method to recover valuable components, with total recovery rate of In up to 90-95%.

Description

technical field [0001] The invention belongs to the smelting method of high-indium and high-iron-zinc concentrate, which is a full hydrometallurgical process for extracting indium, zinc and sulfur from ore. Background technique [0002] The zinc concentrate obtained after flotation and separation of lead-zinc mines mined industrially, which contains more than 10% iron and less than 40% zinc, is regarded as out-of-grade zinc concentrate, which can only be used as ingredients for smelting. The content of the three main components of zinc, iron and sulfur in the concentrate has reached more than 90%. For example, zinc concentrate containing 34% Zn, 25% Fe, and 32% S can no longer reduce the iron content in it through mineral processing industrial means; The content is above 0.1%, the value is important. [0003] For the treatment of high-indium and high-iron-zinc concentrates, the roasting method is usually used. About 95% of the indium remains in the calcined sand and exists ...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/22C22B3/44
CPCY02P10/20
Inventor 夏光祥禹耕之韩宝玲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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