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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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[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 s
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[0043] Example 1
[0044] Weigh 20g of black copper mud (Cu52%, As 19%), add sulfuric acid at 70~80℃ for atmospheric 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 of slurry is oxygen-enriched leaching, the reaction temperature is controlled at 150°C, the reaction time is 2h, and the leaching rates of copper, arsenic and zinc are all above 95%.
[0045] The pressurized leachate is extracted with Lix984N for copper extraction, and the loaded organic phase is subjected to sulfuric acid back extraction to obtain a copper sulfate solution. The copper extraction rate is above 98%. The copper sulfate solution is evaporated and crystallized to produce copper sulfate, yielding 68.5 g of copper sulfate.
[0046] The leaching residue produced from the black copper mud is 50.3g, of which the sulfur grade is above 60%. The raffinate is then reduced with sulfur dioxide and cooled and crystallized to prod...
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[0048] Example 2
[0049] Intermediate materials (Cu 4.02%, S 10.61%, Zn 9.28%, As 8.23, Pb 9.24%, Au 1.58g / t, Ag 161.3g / t) are produced during the mineral smelting process. Weigh 200g of the arsenic-containing material, Direct leaching at 85°C, the leaching residue rate is 45%, and the leaching rates of copper, zinc and arsenic are 50%, 85% and 50% respectively.
[0050] After leaching, the ore pulp is leached with acid and oxygen-rich at 110°C. The leaching rate of copper is over 96%, the leaching rate of arsenic is over 95%, the leaching rate of zinc is over 98%, and 81.2g of leaching residue is produced.
[0051] The leaching solution is extracted with lix984 to extract copper, and loaded with organic reverse extraction to produce copper sulfate.
[0052] The raffinate sulfur dioxide is reduced to produce arsenic trioxide, and the liquid after arsenic removal is purified, neutralized, precipitated, and calcined to produce ultrafine zinc oxide powder.
[0053] In summary, the proces...
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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....
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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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