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Tellurium copper slag treatment method

A treatment method, the technology of tellurium-copper, applied in the field of tellurium-containing materials, can solve the problems of reduced tellurium recovery rate, difficulty in separating copper and tellurium, and poor separation effect of sulfate roasting process, so as to save equipment investment and achieve separation effect Thorough, high recovery effect

Inactive Publication Date: 2018-09-21
YANGGU XIANGGUANG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the actual separation effect of this sulfated roasting process is not very good, copper and tellurium are easy to co-precipitate, resulting in difficulties in the separation of copper and tellurium, resulting in a decrease in the recovery rate of tellurium

Method used

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  • Tellurium copper slag treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Oxidative acid leaching:

[0051] Take 1 kg of tellurium copper slag (Cu 45%, Te 28%, Se 3%, Bi 0.1%, Sb 0.5%), according to the liquid-solid ratio of 5:1, add hydrochloric acid with a concentration of 5mol / L, start stirring, and heat up to 70 ℃, add 450g of sodium chlorate which is 1.1 times the theoretical amount, leaching for 2 hours; filter to obtain 5L oxidative acid leaching solution, acid leaching solution composition: Te 53.7g / L, Cu 88g / L, Se 3g / L, Bi 0.2 g / L.

[0052] 2. Alkaline conversion:

[0053] Take 5L of oxidizing acid immersion solution, add caustic soda to adjust pH=14, heat the solution to boil for 1 hour, filter to obtain 4L of alkali conversion solution, composition of alkali conversion solution: Te 63g / L, Cu 0.01g / L, Se 3.7 g / L, Bi 0.01g / L. At the same time, 650 g of alkali conversion slag was obtained, the composition: Cu 68%, Te 2.5%, Se 0.2%, Bi 0.15%.

[0054] 3. Acidic hydrolysis of alkaline conversion solution:

[0055] Add 4L of alka...

Embodiment 2

[0060] 1. Oxidative acid leaching:

[0061] Take 2kg of tellurium copper slag (Cu 50%, Te 26%, Se 2%, Bi 0.1%, Sb 0.4%), according to the liquid-solid ratio of 5:1, add hydrochloric acid with a concentration of 5mol / L, start stirring, and heat up to 80 ℃, add 880g of sodium chlorate which is 1.1 times of the theoretical amount, leaching for 2h; filter to obtain 10L oxidative acid leaching solution, acid leaching solution composition: Te 50g / L, Cu 98g / L, Se 2g / L, Bi 0.1g / L.

[0062] 2. Alkaline conversion:

[0063] Add 10L of oxidizing acid immersion solution, add caustic soda to adjust pH = 14, heat the solution to boil, boil for 1h, filter, the alkali conversion solution is 8.9L, the composition of the alkali conversion solution: Te 51g / L, Cu 0.01g / L, Se 2g / L, Bi 0.01g / L. At the same time, 1452 g of alkali conversion slag was obtained, the composition: Cu 67.5%, Te 3%, Se 0.17%, Bi 0.12%.

[0064] 3. Acidic hydrolysis of alkaline conversion solution:

[0065] Add 8.9L o...

Embodiment 3

[0070] 1. Oxidative acid leaching:

[0071] Take 1 kg of tellurium copper slag (Cu 45%, Te 28%, Se 3%, Bi 0.1%, Sb 0.5%), according to the liquid-solid ratio of 5:1, add sulfuric acid with a concentration of 3mol / L, start stirring, and heat up to 70 ℃, then add 295g of sodium chloride, add 450g of sodium chlorate as 1.1 times the theoretical amount, and leaching for 2 hours; filter to obtain 5L of oxidative pickling solution, the composition of the pickling solution: Te 53g / L, Cu 85g / L, Se2g / L, Bi 0.1g / L.

[0072] 2. Alkaline conversion:

[0073] Take 5L of oxidizing acid immersion solution, add caustic soda to adjust pH=14, heat the solution to boil for 1 hour, filter to obtain 4L of alkali conversion solution, composition of alkali conversion solution: Te 61g / L, Cu 0.02g / L, Se 2.4 g / L, Bi 0.01g / L. At the same time, 640 g of alkali conversion slag was obtained, the composition: Cu 66%, Te 3.3%, Se 0.06%, Bi 0.07%.

[0074] 3. Acidic hydrolysis of alkaline conversion solu...

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Abstract

The invention provides a tellurium copper slag treatment method which includes the steps of S1, subjecting tellurium copper slag to acidic oxidation and leaching through acid solution and oxidizing agent to obtain acid leachate; S2, subjecting the acid leachate to solid-liquid separation to obtain liquid phase, regulating pH value of the liquid phase to be 12-14 with sodium hydroxide, raising temperature until the liquid is boiled to complete reaction to obtain alkaline transfer solution; S3, subjecting the alkaline transfer solution to acidic hydrolysis to obtain a tellurium dioxide product.The acid solution refers to hydrochloric acid solution or sulfuric acid solution. According to the technical scheme, copper, selenium and tellurium are separated by steps, excellent separation effectis achieved, and recovery rate of valuable elements such as tellurium is high. The whole treatment process is simple, stable and reliable, is adaptable to large-scale industrial application, and achieves good economic benefit. Besides, general hydrometallurgical equipment can be utilized as production equipment, and acidic oxidation and leaching and alkaline transfer can be completed through the equipment only, and thus, equipment investment can be saved.

Description

technical field [0001] The invention relates to the technical field of tellurium-containing material treatment, in particular to a treatment method for tellurium-copper slag. Background technique [0002] With the development of science and technology, tellurium plays an important role in the preparation of materials such as electronics and optics in modern high-tech fields, and is also widely used in traditional manufacturing industries such as metallurgy and chemical industry. The content of tellurium in nature is very low, there are few separate mines, and it is mainly associated with chalcopyrite. Among them, the main component of copper anode slime is copper (Cu), and it is rich in selenium (Se), tellurium (Te), gold (Au), silver (Ag) and other elements with recycling value. Copper anode slime is formed by the deposition of some insoluble elements in the copper anode at the bottom of the electrolytic cell during the copper electrolytic refining process. The treatment p...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C01B19/04C01G3/02
CPCC01B19/004C01G3/02C22B7/007C22B7/04C22B15/00Y02P10/20
Inventor 陈一恒丁成芳余华清郭步贺赵安成
Owner YANGGU XIANGGUANG COPPER
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