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Method for separating sulfur from zinc sulfide concentrate

A technology for zinc sulfide concentrate and sulfur, applied in the field of metallurgy, can solve the problems of low sulfur grade and high energy consumption

Active Publication Date: 2015-07-01
云南永昌铅锌股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can solve the problems of low grade and high energy consumption in extracting sulfur in the prior art, so as to further improve the purity of sulfur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The zinc sulfide concentrate is subjected to pressure leaching treatment, and the liquid-solid ratio of sulfuric acid and zinc sulfide concentrate in the leaching process is controlled to be 5mL:1g to ensure that the pressure leaching process has an effective evaporation; the temperature of the pressure leaching process is controlled to be 125 ° C, The sulfur in the zinc sulfate concentrate leaching solution is distilled at a pressure of 10Mpa and an end-point acidity of 25g / L to ensure that sulfur exists in the form of elemental sulfur during the pressure leaching process and prevent the sulfur produced from being oxidized to SO 4 2- ;Use a closed device to collect the distilled sulfur-containing water vapor, and control the temperature in the closed device to 25°C and the pressure within the range of 0.1-0.5MPa, so as to condense the sulfur and water vapor in the sulfur-containing water vapor; when the airtight When the internal pressure of the device exceeds 0.55MPa,...

Embodiment 2

[0025] The zinc sulfide concentrate is subjected to pressure leaching treatment, and the liquid-solid ratio of sulfuric acid and zinc sulfide concentrate is controlled to be 10mL:1g during the leaching process, so as to ensure that the pressure leaching process has an effective evaporation; the temperature of the pressure leaching process is controlled to be 300°C, The sulfur in the zinc sulfate concentrate leaching solution is distilled at a pressure of 25Mpa and an end-point acidity of 65g / L to ensure that sulfur exists in the form of elemental sulfur during the pressure leaching process and prevent the sulfur produced from being oxidized to SO 4 2- ; Use a closed device to collect the distilled sulfur-containing water vapor, and control the temperature in the closed device to 65°C and the pressure within the range of 0.1-0.5 MPa, so as to condense the sulfur and water vapor in the sulfur-containing water vapor; when the airtight When the internal pressure of the device exce...

Embodiment 3

[0027]The zinc sulfide concentrate is subjected to pressure leaching treatment, and the liquid-solid ratio of sulfuric acid and zinc sulfide concentrate during the leaching process is controlled to be 6.5mL:1g to ensure effective evaporation during the pressure leaching process; the temperature during the pressure leaching process is controlled to be 175°C , the pressure is 15Mpa and the final acidity is 40g / L, the sulfur in the zinc sulfate concentrate leaching solution is distilled to ensure that the sulfur exists in the form of elemental sulfur during the pressure leaching process, and the sulfur produced is not oxidized to SO 4 2- ;Use a closed device to collect the distilled sulfur-containing water vapor, and control the temperature in the closed device to 35°C and the pressure within the range of 0.1-0.5MPa, so as to condense the sulfur and water vapor in the sulfur-containing water vapor; when the airtight When the internal pressure of the device exceeds 0.55MPa, it sha...

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PUM

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Abstract

The invention discloses a method for separating sulfur from zinc sulfide concentrate. The method comprises the following steps of: leaching zinc sulfide concentrate by utilizing sulfuric acid so as to obtain zinc sulfate leaching liquor; and evaporating the zinc sulfate leaching liquor so as to obtain sulfur-containing vapor, wherein the evaporation treatment is carried out under a condition that the temperature of the zinc sulfate leaching liquor is 125 DEG C-300 DEG C under the pressure of 10-25 Mpa. The method disclosed by the invention can be used for solving the problems that the grade of the sulfur extracted by adopting high-temperature distillation is low, the energy consumption is high; moreover, the grade of the separated sulfur can be obviously improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular, the invention relates to a method for separating sulfur from zinc sulfide concentrate. Background technique [0002] When treating zinc sulfide concentrate in a horizontal pressurized reactor, a large amount of zinc dissolves into the zinc sulfate solution, and a large amount of sulfur enters the boiling slag phase in the form of elemental sulfur. In the actual production process, a large amount of sulfur wraps other impurity elements into the slag during the cooling process, resulting in low sulfur grade, and the sulfur-containing slag needs to be separated by sulfur flotation to produce sulfur concentrate. A large amount of zinc-containing liquid is produced during sulfur selection, and the wet electro-galvanizing system is difficult to control. During the operation, due to the sharp drop in coil temperature, elemental sulfur will quickly bond on the coil, and in severe cases, it will c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/027
Inventor 何光深钱建波朱国邦匡志恩张志军王家焕李祖梅李永连周先超王伦顺杨国强
Owner 云南永昌铅锌股份有限公司