Production method of zinc indium by pressurized acid leaching neutralization precipitation separation indium from indium containing high iron zinc sulfide concentrate

A zinc sulfide concentrate, precipitation separation technology, applied in the direction of improving process efficiency, can solve the problems of reducing the volume of indium solution extracted, and achieve the effects of efficient direct leaching, process enhancement, and reduced processing capacity

Inactive Publication Date: 2006-01-11
YUNNAN METALLURGICAL GROUP
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the shortcomings of the existing zinc concentrate smelting methods, and provides a method for smelting zinc sulfide concentrates containing indium and high iron that does not generate sulfur dioxide gas during the smelting process and greatly reduces the volume of the extracted indium solution.

Method used

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  • Production method of zinc indium by pressurized acid leaching neutralization precipitation separation indium from indium containing high iron zinc sulfide concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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...

Embodiment 2

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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 obt...

Embodiment 3

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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% ...

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Abstract

A process for preparing zinc and indium from the In contained high-Fe zinc sulfide ore concentrate includes such steps as grinding, mixing with the waster electrodeposition liquid of Zn to obtain slurry, loading in pressurizing reactor, acid extracting for extracting Zn by more than 99% and In by more than 92%, neutralizing and depositing to separate In, removing Fe from the extracting liquid, solution cleaning, electrodeposition, and fusion-casting to obtain Zn.

Description

technical field [0001] 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. Background technique [0002] 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 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 in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/00C22B58/00
CPCY02P10/20
Inventor 王吉坤董英杨大锦彭建蓉闫江峰
Owner YUNNAN METALLURGICAL GROUP
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