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Synergistic leaching-copper arsenate removing method for leaching residues in high-iron zinc calcine and high-iron zinc sulfide concentrate

A zinc sulfide concentrate and high-iron-zinc technology, applied in the field of zinc hydrometallurgy, can solve the problems of copper resource loss, difficulty in effective recovery, waste, etc., and achieve the effects of efficient reduction, efficient leaching, and improved comprehensive recovery rate

Inactive Publication Date: 2014-05-14
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the copper entering the neutral leaching slag is difficult to effectively recover when using the traditional hydrometallurgy process, resulting in the loss and waste of copper resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. The chemical composition of raw materials and the weight percentage of each composition.

[0013] The chemical composition of the leaching slag in the high-iron zinc calcine taken from a hydrometallurgy enterprise is as follows: 36% zinc, 37% iron, 0.93% copper, and 0.75% arsenic;

[0014] The chemical composition of the high-iron zinc sulfide concentrate obtained from a zinc hydrometallurgy enterprise is as follows: zinc 45.8%, iron 18.9%, copper 0.58%, arsenic 0.41%;

[0015] 2. Synergistic leaching of leaching slag in high-iron-zinc calcine and high-iron zinc sulfide concentrate.

[0016] (1) Mix the leaching slag from the high-iron zinc calcine with the high-iron zinc sulfide concentrate at a mass ratio of 1:0.25, mix with 180g / L sulfuric acid solution, and the leaching liquid-solid ratio is 8mL / g;

[0017] (2) Process control: the temperature is 90°C, the stirring speed is 500 rpm, and the reaction time is 4 hours. The leaching rate of zinc is 98.5%, and the l...

Embodiment 2

[0021] 1. The chemical composition of raw materials and the weight percentage of each composition.

[0022] The chemical composition of the leaching slag in the high-iron zinc calcine obtained from a hydrometallurgy enterprise is as follows: 28% zinc, 31.4% iron, 1.2% copper, and 0.35% arsenic;

[0023] The chemical composition of the high-iron zinc sulfide concentrate obtained from a zinc hydrometallurgy enterprise is as follows: 40% zinc, 25% iron, 0.18% copper, and 0.23% arsenic;

[0024] 2. Synergistic leaching of leaching slag in high-iron-zinc calcine and high-iron zinc sulfide concentrate.

[0025] (1) Mix the leaching slag from the high-iron zinc calcine with the high-iron zinc sulfide concentrate at a mass ratio of 1:0.35, and use 220g / L sulfuric acid solution to mix the slurry, and the leaching liquid-solid ratio is 6mL / g;

[0026] (2) Process control: the temperature is 95°C, the stirring speed is 550 rpm, and the reaction time is 3 hours. The leaching rate of zin...

Embodiment 3

[0030] 1. The chemical composition of raw materials and the weight percentage of each composition.

[0031] The chemical composition of the leaching slag in the high-iron zinc calcine obtained from a hydrometallurgy enterprise is as follows: 15% zinc, 21% iron, 2.13% copper, and 0.65% arsenic;

[0032] The chemical composition of the high-iron zinc sulfide concentrate obtained from a zinc hydrometallurgy enterprise is as follows: 35% zinc, 18% iron, 1.5% copper, and 0.42% arsenic;

[0033] 2. Synergistic leaching of leaching slag in high-iron-zinc calcine and high-iron zinc sulfide concentrate.

[0034] (1) Mix the leaching slag from the high-iron zinc calcine with the high-iron zinc sulfide concentrate at a mass ratio of 1:0.15, mix with 190g / L sulfuric acid solution, and extract a liquid-solid ratio of 7mL / g;

[0035] (2) Process control: the temperature is 85°C, the stirring speed is 500 rpm, and the reaction time is 2 hours. The leaching rate of zinc is 98.5%, and the le...

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Abstract

The invention belongs to the field of wet metallurgy of zinc, and particularly relates to a synergistic leaching-copper arsenate removing method for leaching residues in high-iron zinc calcine and high-iron zinc sulfide concentrate. The method comprises the following steps: mixing the leaching residues in the high-iron zinc calcine with the high-iron zinc sulfide concentrate; mixing zinc electrowinning waste liquor and a part of sulfuric acid-containing solution prepared from concentrated sulfuric acid and synergistically leaching; adding a reaction dosage of industrial iron powder into a synergistically-leached copper arsenate-removing primary solution; replenishing a proper amount of copper sulfate as required; reacting; performing liquid-solid separation on reaction ore pulp to obtain cuprous arsenide precipitate serving as a copper-leaching raw material and a copper arsenate-removing secondary solution; returning the copper arsenate-removing secondary solution to a zinc hydrometallurgy process to further recover valuable metals therein. The method is clean and efficient, efficient leaching of copper and efficient reduction of Fe<3+> can be realized, the solution treatment amount is small, the comprehensive recovery rate of valuable metals in a zinc hydrometallurgy process is increased comprehensively, and the smelting flow is simplified.

Description

technical field [0001] The invention belongs to the field of zinc hydrometallurgy, in particular to a method for synergistic leaching-copper and arsenic removal of leaching slag in high-iron zinc calcine and high-iron zinc sulfide concentrate. Background technique [0002] In the existing hydrometallurgical technology, the enrichment methods of copper in copper-containing acidic solution are mainly solvent extraction method and metal replacement method. Solvent extraction is mainly used in the enrichment process of copper in the solution with high copper ion concentration produced in the wet copper smelting process. In the zinc hydrometallurgy process, due to the low copper content of the zinc concentrate, the copper concentration in the leaching solution is also low. At this time, when the solvent extraction method is used in the production process, the solution processing volume is large, and the process is difficult to control, while zinc powder, iron powder or Metal pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/44C22B19/00
CPCY02P10/20
Inventor 魏昶朱北平邓志敢曹元庆李存兄李旻廷李兴彬
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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