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Treating method of arsenious material

A treatment method and material technology, applied in the field of smelting and processing, can solve problems such as environmental pollution, achieve the effects of solving environmental pollution, reducing environmental pollution, and improving comprehensive utilization

Active Publication Date: 2013-01-02
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a treatment method for arsenic-containing materials, which can solve the problem of environmental pollution caused by the accumulation and stockpiling of arsenic in the system, and can also comprehensively recover various valuable metals, thereby improving the comprehensive utilization of resources rate, reducing environmental pollution

Method used

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  • Treating method of arsenious material

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Effect test

Embodiment 1

[0044]Weigh 20g of black copper mud (Cu52%, As 19%), add sulfuric acid at 70~80°C for normal pressure stirring and leaching, the reaction time is 2h, after the reaction, the pulp and arsenic sulfide residue (Cu 8%, As 22%, Zn 0.8, S 30%) 100g slurry, then carry out oxygen-enriched leaching, control the reaction temperature at 150°C, and the reaction time is 2h, the leaching rates of copper, arsenic and zinc all reach above 95%.

[0045] The pressurized leaching solution was extracted with Lix984N to extract copper, and the loaded organic phase was back-extracted with sulfuric acid to obtain a copper sulfate solution. The copper extraction rate reached more than 98%. The copper sulfate solution was evaporated and crystallized to produce copper sulfate, and 68.5g of copper sulfate was produced.

[0046] The leaching residue produced by the above-mentioned black copper mud is 50.3g, of which the sulfur grade is above 60%. The raffinate is then reduced by sulfur dioxide, cooled and...

Embodiment 2

[0049] The intermediate material (Cu 4.02%, S 10.61%, Zn 9.28%, As 8.23, Pb9.24%, Au 1.58g / t, Ag 161.3g / t) produced during the mineral smelting process, weighed 200g of the arsenic-containing material, Direct leaching was carried out at 85°C, the leaching slag rate was 45%, and the leaching rates of copper, zinc and arsenic were 50%, 85% and 50% respectively.

[0050] After leaching, the pulp was subjected to acidic oxygen-enriched leaching at 110°C. The copper leaching rate reached over 96%, the arsenic leaching rate reached over 95%, and the zinc leaching rate reached over 98%, and 81.2g of leaching slag was produced.

[0051] The leaching solution is extracted with lix984 to extract copper, and the loaded organic phase extraction is used to produce copper sulfate.

[0052] The sulfur dioxide in the raffinate is reduced to produce arsenic trioxide, and the liquid after dearsenization is purified, neutralized and precipitated, and calcined to produce ultrafine zinc oxide powd...

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Abstract

The invention discloses a treating method of an arsenious material. The processing method comprises the steps as follows: firstly carrying out normal pressure acid leaching on the arsenic material to make the copper, zinc, arsenic penetrate into the solution and also make the lead, gold and silver concentrate in the leaching slag; employing an extraction method to recover the copper from the leaching liquid rich in copper, zinc and arsenic; performing electrowining on the extracted and back-extracted leaching liquid to produce cathode copper or performing crystallization evaporation to produce cupric sulfate; reducing the extracted leaching liquid with sulfur dioxide to produce arsenic trioxide, then producing arsenic trioxide with purity of 99.9% after washing and drying; returning part of the reduced solution to the oxygen-rich leaching process and performing purification, precipitation and calcinations to obtain superfine zinc oxide powder; and returning oxygen-rich leaching residue containing lead, gold and silver to the recovery process for lead, gold and silver to produce electrolytic lead, silver, gold, antimony, bismuth products. According to the above method, the problem of environmental pollution caused by accumulation and storage of arsenic in the system is solved, and a variety of valuable metals are also comprehensively recycled, thereby improving the comprehensive utilization rate of resources and reducing the environmental pollution.

Description

technical field [0001] The invention relates to the technical field of smelting and processing, in particular to a method for treating arsenic-containing materials. Background technique [0002] At present, complex arsenic-containing materials are produced in the smelting process of copper, lead, zinc and other minerals, and arsenic and its soluble compounds are highly toxic. Acute poisoning will occur after the human body ingests 70-200mg of inorganic arsenic compounds. The resource utilization of arsenic-containing materials produced in the mineral smelting process is of great significance to reduce environmental pollution and improve economic benefits of enterprises. The amount of arsenic brought into the system by copper smelting in my country is as high as 20,000 tons per year. Except for some entering the smelting slag, more than 80% is enriched in soot, arsenic sulfide filter cake produced by sulfide precipitation after washing with waste acid, and copper electrolyte....

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/26C22B15/00C22B30/04
CPCY02P10/20
Inventor 蒋开喜王海北李岚王玉芳魏帮黄胜蒋应平刘三平
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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