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Treatment technique of copper-containing high-indium high-iron zinc sulfide concentrate

A technology of zinc sulfide concentrate and processing technology, which is applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve the problems that copper and tin are not effectively recovered, hematite slag is difficult to sell, and iron content is high. Achieve clean and efficient smelting process, avoid flue gas pollution, and achieve zero discharge of waste residue

Active Publication Date: 2015-07-01
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have effectively improved the recovery rate of zinc and indium, and comprehensively utilized the iron in the ore, but the associated copper and tin in the ore have not been effectively recovered
At the same time, due to the particularity of the hematite process, the hematite slag contains a high amount of arsenic, which makes it difficult to sell the hematite slag, and the high content of iron, fluorine, and chlorine in the liquid after iron removal from the hematite ore

Method used

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  • Treatment technique of copper-containing high-indium high-iron zinc sulfide concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Mix 50kg of high-iron zinc calcine with 500L of weak acid solution containing 150g / L of zinc and 0.8g / L of iron and 135L of waste electrolyte containing 45g / L of zinc and 160g / L of sulfuric acid, and control the reaction temperature at 60°C. React for 2 hours, carry out neutralization and hydrolysis to remove impurities, and obtain the infusion solution containing zinc 152g / L, copper 0.6g / L, fluorine 0.042g / L, chlorine 0.143g / L, iron 15mg / L and zinc 22 %, middle leaching residue containing 29% iron.

[0033] 2. Add 45kg of high-iron zinc calcined sand and 23kg of leaching slag to 550L of iron-precipitated solution containing 106g / L zinc and 6.5g / L iron, keep the reaction temperature at 80°C, and react for 6 hours to carry out pretreatment of the iron-containing solution. A weak acid solution containing 150g / L of zinc, 0.6g / L of copper, 0.022g / L of fluorine, 0.110g / L of chlorine, and 0.8g / L of iron and a weak acid slag containing 18% of zinc and 32% of iron were obtai...

Embodiment 2

[0041] 1. Mix 55kg of high-iron zinc calcine with 500L of weak acid solution containing 151g / L of zinc and 0.3g / L of iron and 145L of waste electrolyte containing 45g / L of zinc and 160g / L of sulfuric acid, and control the reaction temperature at 70°C. React for 2 hours, carry out neutralization and hydrolysis to remove impurities, and obtain the infusion solution containing zinc 153g / L, copper 0.5g / L, fluorine 0.039g / L, chlorine 0.131g / L, iron 8mg / L and zinc 21 %, middle leaching residue containing 29% iron.

[0042] 2. Add 50kg of high-iron zinc calcined sand and 28kg of leaching slag to 550L of iron-precipitated solution containing 106g / L zinc and 4.2g / L iron, keep the reaction temperature at 90°C, and react for 4 hours to carry out pretreatment of the iron-containing solution. A weak acid solution containing 151g / L of zinc, 0.5g / L of copper, 0.028g / L of fluorine, 0.119g / L of chlorine, and 0.3g / L of iron and a weak acid slag containing 19% of zinc and 31% of iron were obtain...

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Abstract

The invention provides a treatment technique of a copper-containing high-indium high-iron zinc sulfide concentrate, relating to a slag / ore synergic leaching-combined iron precipitation technique of a copper-containing high-indium high-iron zinc sulfide concentrate. The technique comprises the following steps: (1) roasting the high-iron zinc sulfide concentrate in a fluidized bed furnace to obtain high-iron zinc calcine; (2) carrying out neutralizing hydrolysis on the high-iron zinc calcine and a zinc-hydrometallurgy electrolysis waste liquid for impurity removal to generate a medium immersion liquid and medium immersion slag; (3) mixing the medium immersion slag with high-iron zinc calcine and a weak acid solution to generate a weak acid solution and weak acid slag; (4) mixing the weak acid slag with the high-iron zinc sulfide concentrate and a strong acid solution to perform slag-ore synergic leaching to generate a synergic leach solution and synergic leach slag; (5) carrying out strong acid leaching on the synergic leach slag to generate a strong acid solution and strong acid slag; (6) separating and recovering copper and indium from the synergic leach solution by a two-stage continuous replacement technique to generate copper-rich slag, indium-rich slag and an indium precipitation solution; and (7) carrying out high-temperature oxygen-pressure hydrothermal iron precipitation on the indium precipitation solution to obtain an iron precipitation solution and recoverable iron slag. The technique has high metal recovery rate, and solves the problem of zinc-iron separation.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a slag ore synergistic leaching-combined iron-precipitation process of copper-containing high-indium and high-iron zinc sulfide concentrate. Background technique [0002] The iron removal process plays an important role in the metallurgical industry, especially in the hydrometallurgy process of high-iron sphalerite. During the ore-forming process of sphalerite, iron and indium replace zinc atoms in sphalerite with isomorphism, and it is difficult to separate zinc, iron, and indium by mechanical grinding and beneficiation methods, resulting in the zinc produced by beneficiation Concentrates with high iron content and low zinc content are associated with relatively high content of indium, copper and other metals, which are called high-iron-zinc concentrates. This kind of high-iron-zinc concentrate usually has low zinc grade, high indium and iron content, low as...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B3/46C22B3/06C22B15/00C22B1/02C25C1/16
CPCY02P10/20
Inventor 魏昶朱北平邓志敢张帆尹华光李彪曹元庆牛辉王邦伟李存兄李兴彬李旻廷
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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