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Method of directly leaching zinc ore concentrate or low grade mixing zinc ore under normal pressure and alkaline condition

A zinc concentrate, low-grade technology, applied in the direction of improving process efficiency, can solve the problems of limited applicability, high material requirements, high cost, etc., and achieve good social and economic benefits

Inactive Publication Date: 2010-07-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, zinc sulfide in zinc concentrate or low-grade mixed zinc ore cannot be directly dissolved in acidic or alkaline media under normal pressure due to its special chemical properties. The traditional high-pressure and high-temperature process has high material requirements and high cost , operating hazards and other disadvantages limit its applicability

Method used

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  • Method of directly leaching zinc ore concentrate or low grade mixing zinc ore under normal pressure and alkaline condition
  • Method of directly leaching zinc ore concentrate or low grade mixing zinc ore under normal pressure and alkaline condition
  • Method of directly leaching zinc ore concentrate or low grade mixing zinc ore under normal pressure and alkaline condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Please refer to the attached figure 1 . The zinc concentrate produced in Lancang, Yunnan is used as raw material, and its chemical composition is shown in Table 1.

[0019] Table 1 Chemical composition of Lancang zinc concentrate

[0020]

[0021] 100g of above-mentioned zinc concentrate raw material is pulverized to 0.5-1mm, joins in the stirred mill reactor, adds 1-1.5L concentration simultaneously and is 2-8M industrial caustic soda solution and 50-150g leaded leaching reaction accelerator (is the Commercial-grade lead carbonate and lead oxide are mixed in any proportion), and raw materials: activation medium (corundum ball or stainless steel ball) with an activation medium ratio of 1:5 (mass ratio), and the leaching temperature is controlled at 70-90°C , under the stirring condition of 300-600 rev / min, react for 60min. The extraction rate of zinc in zinc concentrate is 86.5%. Filter, wash the leaching residue (filter residue) with water, and use the washing ...

Embodiment 2

[0023] The zinc concentrate in Mengzi, Yunnan is used as raw material, and its chemical composition is shown in Table 2.

[0024] Table 2 Chemical composition of Yunnan Mengzi zinc concentrate

[0025]

[0026] 100g of the above-mentioned zinc concentrates are pulverized to 0.5-1mm and added to the stirred mill reactor, and 0.8-1.2L concentration of 2-8M industrial caustic soda solution and 40-100g lead-containing leaching reaction accelerator (commercially available industrial grade) are added simultaneously. lead sulfate and lead peroxide mixed in any proportion), and the activation medium (corundum ball or stainless steel ball) with the mass ratio of raw material:activation medium (1:5~1):20, and the leaching temperature is controlled at 80-90 °C, react for 90 minutes under the stirring condition of 300-600 rpm. The extraction rate of zinc in zinc concentrate is 89.2%. Filter, wash the filter residue with water, and keep the washing water for the leaching process. Mea...

Embodiment 3

[0028] The low-grade mixed zinc ore in Xinjiang is used as raw material, and its chemical composition is shown in Table 3. According to phase analysis, ZnS accounts for 40% of the zinc content, ZnO and ZnCO 3 60%.

[0029] Table 3 Chemical composition of low-grade mixed zinc deposits in Xinjiang

[0030]

[0031] 100g of the above-mentioned low-grade mixed zinc ore pulverized to 0.5-1mm is added in the stirring mill reactor, and 0.2-0.6L concentration is added at the same time as 2-8M industrial caustic soda solution and 5-25g lead-containing leaching reaction accelerator (according to any The mixture of lead nitrate and trilead tetroxide mixed in proportion), and raw material: activation medium is 1:10 (mass ratio) of corundum ball or stainless steel ball activation medium, the leaching temperature is controlled at 70-80 ° C, at 300-600 The reaction was carried out for 120 min under the stirring condition of rev / min. The extraction rate of zinc in zinc concentrate is 81...

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Abstract

The invention relates to a method for atmosphericically direct-leaching zinc concentrate or low grade mixed zinc ore. In the invention, it firstly smashes the zinc concentrate or low grade mixed zinc ore into 0.5~1mm, then it respectively measures materials as follow: raw material: activated medium = 1:(5~20), leaching reaction accelerator: zinc sulfide of the raw material = (1~2.5): 1, then it puts the materials into a stirred mill activated reactor for grinding and leaching for 60~120 minutes under the condition with an alkaline concentration of 2~8M, 70~100 deg.C and a stirring speed of 300~600 r / min. More than 80% of zinc in the raw material is dissolved and leached. After filtration, it processes the dregs with sodium carbonate into the reaction accelerator by recycling of lead, and then it is returned for leaching. The electrolytic extraction of leaching is returned for leaching after the extraction of zinc.

Description

technical field [0001] The invention relates to a method for direct alkaline leaching of zinc concentrate or low-grade mixed zinc ore at atmospheric pressure, and relates to a method for producing zinc powder from zinc concentrate or low-grade mixed zinc ore. It belongs to the field of non-ferrous metal recycling and solid waste recycling. Background technique [0002] Metal zinc is widely used in alloy, casting, electroplating, printing and dyeing, pharmaceutical, rubber and battery industries. Metal zinc has become an important metal material essential to the national economy and the people's livelihood. Due to its wide range of uses and economical properties, the production and consumption of metal zinc continue to increase. According to the statistics of the International Lead and Zinc Study Group (ILZSG), the world's zinc The average annual growth rate of consumption is 2.7%. In 2006, the annual consumption of zinc was 11.064 million tons. [0003] The traditional aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/12C22B1/14C22B19/00
CPCY02P10/20
Inventor 赵由才张承龙易天晟郭翠香刘清邱媛媛
Owner TONGJI UNIV
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