Method for extracting indium from high-indium high-iron zinc sulphide concentrates by pressure acid leach and solvent extraction

A technology for zinc sulfide concentrate and high-speed iron, which is applied in the direction of improving process efficiency, can solve the problems of long processing flow, low indium recovery rate, difficult to handle economically, and achieves high indium recovery rate, high leaching temperature, and process intensification. Effect

Inactive Publication Date: 2005-09-07
YUNNAN METALLURGICAL GROUP
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the above-mentioned process has the disadvantages of long treatment process and low indium recovery rate.
Especially for zinc-containing materials with iron content as high as 18-25%, it is difficult to economically process them using traditional technological processes

Method used

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  • Method for extracting indium from high-indium high-iron zinc sulphide concentrates by pressure acid leach and solvent extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1. The high-indium and high-iron zinc sulfide concentrate has an iron content of 15%, an indium content of 0.03%, and a zinc content of 42.45%.

[0010] The finely ground high-indium and high-iron zinc sulfide concentrate is slurried with the electrolytic zinc waste electrolyte, and put into an acid-resistant pressure kettle made of titanium with a volume of 4L for continuous oxygen leaching.

[0011] The zinc leaching rate is 99.28%, the indium leaching rate is 97.43%, and the sulfur conversion rate is 82.38%. The leaching solution contains 138g / L of zinc and 45.78mg / L of indium. The leaching slag contains 0.67% zinc and 53.88% elemental sulfur.

[0012] Leaching solution plus 3 # 0.3g / L, gelatin 0.15g / L, stand at 65°C for 6 hours, after pretreatment, use 20% P204+80% kerosene solution, use 5-stage countercurrent extraction of indium, the extraction rate of indium is 96.58%.

[0013] The solution after indium extraction adopts the low-pollution jarosite metho...

Embodiment 2

[0014] Example 2. The high-indium and high-iron zinc sulfide concentrate has an iron content of 18%, an indium content of 0.09%, and a zinc content of 40%.

[0015] The finely ground high-indium and high-iron zinc sulfide concentrate is slurried with electrolytic zinc waste electrolyte, and added to a 4L titanium autoclave for continuous oxygen leaching.

[0016] 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 high indium. The leaching slag contains 0.87% zinc and 55.23% elemental sulfur.

[0017] Leaching solution plus 3 # 0.3g / L, gelatin 0.1g / L, stand at 55°C for 6 hours, after pretreatment, use 20% P204 + 80% kerosene solution, use 5-stage countercurrent extraction of indium, the extraction rate of indium is 95.89%.

[0018] The liquid after indium extraction adopts the hematite method to remove iron, and the iron slag contains 0.81% zinc.

Embodiment 3

[0019] Example 3, the iron content of the high indium and high iron zinc sulfide concentrate is 25%, the indium content is 0.042%, the zinc 48% concentrate is ground, and 96% passes through a 0.043mm sieve.

[0020] The finely ground high-indium and high-iron zinc sulfide concentrate is slurried with the electrolytic zinc waste electrolyte, and put into an acid-resistant pressure kettle made of titanium with a volume of 4L for continuous oxygen leaching.

[0021] The zinc leaching rate is 99.48%, the indium leaching rate is 98.21%, and the sulfur conversion rate is 83.62%. The leaching solution contains 141g / L of zinc and 55.63mg / L of high indium. The leaching slag contains 1.02% zinc and 54.42% elemental sulfur.

[0022] Leaching solution plus 3 # 0.3g / L, gelatin 0.2g / L, stand at room temperature for 10 hours, after pretreatment, use 20% P204 + 80% kerosene solution to extract indium with 5-stage countercurrent, and the extraction rate of indium is 97.13%.

[0023] The solu...

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Abstract

The invention relates to an indium extraction method by acid dipping and solvent extraction under high pressure from zine sulfide clean ore with high component of indium and iron. After jevigating process of zine sulfide clean ore with high component of indium and iron, pasting the powder with zinc electrodeposition discard solution, sending the mixture to pressure pan to do acid dipping directly, in which zinc leaching ratio approaches to 99% or higher while indium leaching ratio approaches to 96% or higher, extracting more than 95% of indium in leachate by solvent, so recovery ratio of sponge indium from zine clean ore approaches to 85% or more, processing leachate, from which indium is extracted, to produce sine by wet zinc smelting technology such as deironing, extraction in neutral condition, solution purification, electrodeposition and fusion casting. This invention has the properties of simplifying process, high recovery ratio of indium and zine and high-activity processing of complex zinc clean ore with high component of indium.

Description

technical field [0001] The invention belongs to a method for smelting high-indium-zinc concentrates, and more specifically relates to a method for extracting indium from high-indium and high-iron zinc sulfide concentrates. Background technique [0002] High indium and high iron zinc sulfide concentrate refers to the general term for a type of zinc sulfide concentrate that contains more than 15% iron, less than 48% zinc, and is associated with relatively high scattered metal indium, and cannot remove iron during the beneficiation process. . [0003] For the treatment of materials such as "high indium and high iron zinc sulfide concentrate", currently "boiling roasting - high temperature and high acid leaching - jarosite iron removal" or "boiling roasting - high temperature and high acid leaching - goethite removal Iron” process, due to the formation of zinc ferrite inclusions during the roasting process, high temperature and high acid leaching must be used to obtain more tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/38
CPCY02P10/20
Inventor 王吉坤董英吴锦梅杨大锦闫江峰彭建蓉
Owner YUNNAN METALLURGICAL GROUP
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