Method for individually processing high-iron zinc sulfide concentrate

A technology of zinc sulfide concentrate and high-speed iron, applied in the direction of improving process efficiency, etc., to achieve the effects of improving recovery rate, strong process pertinence, and reducing energy consumption

Active Publication Date: 2013-11-27
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of high-efficiency separation and comprehensive recovery of zinc, iron, indium and copper in the smelting process, and provide a process for extracting zinc, indium, copper and iron resources from high-iron zinc concentrate method, improve metal recovery rate and resource comprehensive utilization rate, and reduce environmental pollution

Method used

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  • Method for individually processing high-iron zinc sulfide concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Mix 100kg of zinc calcine with 376L of iron removal solution containing 45g / L of sulfuric acid and 98g / L of zinc, 214L of waste electrolyte containing 165g / L of sulfuric acid and 37.5g / L of zinc for neutral leaching to obtain zinc-containing 138g / L neutral leaching solution, the neutral leaching solution is sent to purification electrolysis; output neutral leaching residue 65kg, its composition is as follows (wt%): Zn: 25.94, Fe: 26.58, In: 0.051, Cu: 1.00, Pb: 0.099.

[0027] 2. Mix 51.2kg of the above-mentioned neutral leaching slag with 15.3kg of high-iron zinc sulfide concentrate, and mix it with 173L of oxidation leaching solution containing 30g / L sulfuric acid and 46g / L zinc, and waste electrolyzer containing 165g / L sulfuric acid and 37.5g / L zinc. 182L of solution, 23L of concentrated sulfuric acid with a concentration of 98% and 21L of water were mixed for reduction leaching, the leaching temperature was 90°C, and the leaching time was 3h to obtain 385L of redu...

Embodiment 2

[0034] 1. Mix 100kg of zinc calcined sand with 378L of iron removal solution containing 48g / L of sulfuric acid and 105g / L of zinc, 212L of waste electrolyte containing 165g / L of sulfuric acid and 37.5g / L of zinc for neutral leaching to obtain zinc-containing 141g / L neutral leaching solution, the neutral leaching solution is sent to purification electrolysis; the output neutral leaching residue is 62kg, the composition is as follows (wt%): Zn: 25.94, Fe: 26.58, In: 0.051, Cu: 1.00, Pb: 0.099.

[0035] 2. Mix 52kg of the above-mentioned neutral leaching slag with 11kg of high-iron zinc sulfide concentrate, mix with 130L of oxidation leaching solution containing 28g / L of sulfuric acid and 42g / L of zinc, 186L of spent electrolyte containing 165g / L of sulfuric acid and 37.5g / L of zinc , 25L of concentrated sulfuric acid with a concentration of 98% and 33L of water were mixed for reduction leaching, the leaching temperature was 95°C, and the leaching time was 2h to obtain 358L of red...

Embodiment 3

[0042] 1. Mix 100kg of zinc calcined sand with 375L of iron-removing solution containing 46g / L of sulfuric acid and 103g / L of zinc, 215L of waste electrolyte containing 165g / L of sulfuric acid and 37.5g / L of zinc for neutral leaching to obtain zinc-containing 138g / L neutral leaching solution, the neutral leaching solution is sent to purification electrolysis; 64kg of neutral leaching residue is produced, the composition is as follows (wt%): Zn: 25.94, Fe: 26.58, In: 0.051, Cu: 1.00, Pb: 0.099.

[0043] 2. Mix 53kg of the above-mentioned neutral leaching slag with 12.5kg of high-iron zinc sulfide concentrate, mix it with 146L of oxidation leachate containing 30g / L of sulfuric acid and 45g / L of zinc, and waste electrolyte containing 165g / L of sulfuric acid and 37.5g / L of zinc 180L, 24L of concentrated sulfuric acid with a concentration of 98% and 27L of water were mixed for reduction leaching, the leaching temperature was 85°C, and the leaching time was 4h to obtain 372L of reduc...

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Abstract

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for individually processing high-iron zinc sulfide concentrate. The method comprises a step of subjecting the high-iron zinc sulfide concentrate to calcination in a fluidized bed combustion boiler to obtain zinc calcine; a step of subjecting the zinc calcine to neutral leaching to produce neutral leaching solution and neutral leaching residue; a step of, after the neutral leaching residue and the high-iron zinc sulfide concentrate are mixed, successively performing reduction leaching and oxidation leaching, and circulating oxidation leaching solution to the reduction leaching to produce reduction leaching solution and silver-rich sulfur residue; a step of replacing the reduction leaching solution by using iron powder to precipitate copper and to produce copper-rich slag and solution after copper precipitation; a step of subjecting the solution after copper precipitation to pre-neutralization by using the zinc calcine, and then replacing by using zinc powder to precipitate indium and to produce indium-rich slag and solution after indium precipitation; and a step of bubbling oxygen into the solution after indium precipitation, heating and removing iron to obtain iron removal solution and hematite slag. The hematite slag can be utilized as a raw material for ironmaking. The method has strong pertinence, short technological process and high metal recovery yield, and the method is clean, efficient, energy-saving and environmental friendly. Separation and comprehensive utilization of zinc, indium, copper and iron are achieved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, in particular to a method for separately treating high-iron zinc sulfide concentrate. Background technique [0002] 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 associated lead content, and a considerable amount of associated copper and tin. [0003] During the smelting process, due to the mosaic coexistence of iron and zinc in the high-iron-zinc concentrate, a large amount of zinc ferrite w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/46C22B11/00C22B15/00C22B58/00C22B19/00
CPCY02P10/20
Inventor 魏昶邓志敢李存兄张帆樊刚李兴彬李旻廷
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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