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A method for removing chloride ions from hydrometallurgy zinc leaching solution

A technology of hydrometallurgy and leaching solution, which is applied in the direction of improving process efficiency, can solve problems such as rising production costs, and achieve the effects of low cost, extensive promotion value, and short process

Active Publication Date: 2017-06-23
XIAN RAREALLOYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Zinc powder and copper ion dechlorination method is to use zinc powder to dechlorinate Cu 2+ Reduction to form Cu + , Cu powder and Cl - Interaction produces cuprous chloride precipitation, because zinc powder needs to be added, resulting in increased production costs

Method used

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  • A method for removing chloride ions from hydrometallurgy zinc leaching solution

Examples

Experimental program
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Effect test

Embodiment 1

[0026] combine figure 1 , the present embodiment removes the method for chloride ion from hydrometallurgy zinc leaching liquid and comprises the following steps:

[0027] Step 1, respectively detecting the concentration of chloride ions and the concentration of copper ions in the zinc hydrometallurgy leaching solution, the concentration of recorded chloride ions is C1, the concentration of copper ions is C2, and the units of C1 and C2 are mg / L;

[0028] In this embodiment, take 1L of zinc hydrometallurgy leaching liquid, measure C1=1346mg / L, C2=820mg / L;

[0029] Step 2. Analyze the concentration C2 of copper ions measured in step 1. If C2 satisfies C2 ≥ 1.7C1, then enter step 3; Adjust to C3 so that C3 satisfies C3:C1=(1.7~5.0):1, and then enter step three; the unit of C3 is mg / L;

[0030] After analysis, C2 in this example does not satisfy C2≥1.7C1, therefore, the concentration of copper ions in the hydrometallurgy leachate is adjusted to C3=2334mg / L by adding copper sulfat...

Embodiment 2

[0036] combine figure 1 , the present embodiment removes the method for chloride ion from hydrometallurgy zinc leaching liquid and comprises the following steps:

[0037] Step 1, respectively detecting the concentration of chloride ions and the concentration of copper ions in the zinc hydrometallurgy leaching solution, the concentration of recorded chloride ions is C1, the concentration of copper ions is C2, and the units of C1 and C2 are mg / L;

[0038] In this embodiment, take 1L of wet-process zinc leaching solution, and measure C1=1152mg / L, C2=774mg / L;

[0039] Step 2. Analyze the concentration C2 of copper ions measured in step 1. If C2 satisfies C2 ≥ 1.7C1, then enter step 3; Adjust to C3 so that C3 satisfies C3:C1=(1.7~5.0):1, and then enter step three; the unit of C3 is mg / L;

[0040] After analysis, C2 in this example does not satisfy C2≥1.7C1, therefore, the concentration of copper ions in the zinc hydrometallurgy leaching solution is adjusted to C3=1913mg / L by addi...

Embodiment 3

[0046] combine figure 1 , the present embodiment removes the method for chloride ion from hydrometallurgy zinc leaching liquid and comprises the following steps:

[0047] Step 1, respectively detecting the concentration of chloride ions and the concentration of copper ions in the zinc hydrometallurgy leaching solution, the concentration of recorded chloride ions is C1, the concentration of copper ions is C2, and the units of C1 and C2 are mg / L;

[0048] In this embodiment, take 1L of zinc hydrometallurgy leaching solution, and measure C1=906mg / L, C2=861mg / L;

[0049] Step 2. Analyze the concentration C2 of copper ions measured in step 1. If C2 satisfies C2 ≥ 1.7C1, then enter step 3; Adjust to C3 so that C3 satisfies C3:C1=(1.7~5.0):1, and then enter step three; the unit of C3 is mg / L;

[0050] After analysis, C2 in this example does not satisfy C2 ≥ 1.7C1, therefore, the concentration of copper ions in the zinc hydrometallurgy leaching solution is adjusted to C3=1812mg / L by...

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Abstract

The invention provides a method for removing chloride ions from the leaching solution of zinc hydrometallurgy, comprising the following steps: 1. detecting the concentration of chloride ions and the concentration of copper ions in the leaching solution of zinc hydrometallurgy; Analyze the copper ion concentration obtained; 3. Add copper slag to the zinc hydrometallurgy leaching solution to obtain a slurry; 4. Then feed reducing gas into the slurry to make chloride ions form precipitation; 5. Detect the concentration of the slurry Oxidation-reduction potential, if meet the requirements, then stop feeding the reducing gas, filter to obtain the hydro-smelting zinc leaching solution from which chloride ions have been removed; otherwise, return to step 4. The invention has the characteristics of short process, low cost, high chlorine removal efficiency, no introduction of other impurities, maintaining the original zinc hydrometallurgy process, etc., and has wide popularization value.

Description

technical field [0001] The invention belongs to the technical field of chlorine removal by chemical precipitation, and in particular relates to a method for removing chlorine ions from a zinc hydrometallurgy leaching solution. Background technique [0002] Zinc hydrometallurgy refers to the method of leaching zinc from zinc oxide calcine or other materials with an acidic solution, and then using electrolytic deposition technology to prepare metal zinc from the zinc leaching solution. Zinc hydrometallurgy mainly includes four main processes: zinc concentrate roasting, zinc calcined sand leaching, leachate purification and impurity removal, and zinc electrowinning. In the process of hydrometallurgy zinc, excessively high chloride ions in the zinc electrolytic circulation liquid cause great harm to the electrolytic zinc process and product quality, manifested as severe corrosion of the anode plate, increased impurity lead content in the product, and increased energy consumption...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44C22B19/20
CPCY02P10/20
Inventor 李进彭济时许万祥王靖坤孙晓亮王治钧马光
Owner XIAN RAREALLOYS
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