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Method for removing chloride ion from lixivium of zinc hydrometallurgy

A technology for hydrometallurgical zinc smelting and leachate, which is applied in the direction of improving process efficiency, can solve problems such as increasing production costs, and achieve the effects of low cost, widespread promotion value and short process flow.

Active Publication Date: 2015-06-10
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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  • Method for removing chloride ion from lixivium of zinc hydrometallurgy

Examples

Experimental program
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Effect test

Embodiment 1

[0026] combine figure 1 , the method for removing chloride ions from the hydrometallurgical zinc leaching solution in the present embodiment comprises the following steps:

[0027] Step 1: Detect the concentration of chloride ions and the concentration of copper ions in the zinc hydrometallurgical leaching solution respectively, and the measured concentration of chloride ions is C1, the concentration of copper ions is C2, and the units of C1 and C2 are mg / L;

[0028] In this example, take 1L of zinc hydrometallurgy leaching solution, and 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 3; the unit of C3 is mg / L;

[0030] After analysis, C2 does not satisfy C2≥1.7C1 in this embodiment, therefore, adopt the method of adding copper sulfate to adjust the concentration of copper ions in the hydromet...

Embodiment 2

[0036] combine figure 1 , the method for removing chloride ions from the hydrometallurgical zinc leaching solution in the present embodiment comprises the following steps:

[0037] Step 1: Detect the concentration of chloride ions and the concentration of copper ions in the zinc hydrometallurgical leaching solution respectively, and the measured concentration of chloride ions is C1, the concentration of copper ions is C2, and the units of C1 and C2 are mg / L;

[0038] In this example, take 1 L of zinc hydrometallurgy 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 3; the unit of C3 is mg / L;

[0040] After analysis, C2 does not satisfy C2≥1.7C1 in this embodiment, therefore, adopt the method of adding copper sulfate to adjust the concentration of copper ions in the hydrome...

Embodiment 3

[0046] combine figure 1 , the method for removing chloride ions from the hydrometallurgical zinc leaching solution in the present embodiment comprises the following steps:

[0047] Step 1: Detect the concentration of chloride ions and the concentration of copper ions in the zinc hydrometallurgical leaching solution respectively, and the measured concentration of chloride ions is C1, the concentration of copper ions is C2, and the units of C1 and C2 are mg / L;

[0048] In this example, take 1L of zinc hydrometallurgy leaching solution, 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 3; the unit of C3 is mg / L;

[0050] After analysis, C2 in this embodiment does not satisfy C2≥1.7C1, therefore, the concentration of copper ions in the hydrometallurgical zinc leaching solution is adjusted to C3=1812m...

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Abstract

The invention discloses a method for removing chloride ion from lixivium of zinc hydrometallurgy. The method for removing the chloride ion from the lixivium of zinc hydrometallurgy includes steps that 1, detecting the concentration of the chloride ion and concentration of copper ion in the lixivium of zinc hydrometallurgy; 2, analyzing the copper ion concentration of the step 1; 3, adding copper slag to the lixivium of zinc hydrometallurgy to obtain slurry; 4, filling reductive gas to the slurry to enable the chloride ion to form sediment; 5, detecting the oxidation reduction potential of the slurry, if the oxidation reduction potential meets the demand, stopping filling reductive gas, and filtering to obtain the lixivium of zinc hydrometallurgy without chloride ion; otherwise, returning to the step 4. The method for removing the chloride ion from the lixivium of zinc hydrometallurgy is featured with short flow, low cost and high chloride removing efficiency, other impurities are not led in, the original zinc hydrometallurgy technique is kept, and the popularization value is high.

Description

technical field [0001] The invention belongs to the technical field of chemical precipitation and dechlorination, and in particular relates to a method for removing chloride ions from a zinc hydrometallurgical leaching solution. Background technique [0002] Zinc hydrometallurgy refers to a method of leaching zinc from zinc oxide calcine or other materials with an acidic solution, and then preparing metallic zinc from the zinc leaching solution by electrolytic deposition technology. Zinc hydrometallurgy mainly includes four main processes: zinc concentrate roasting, zinc calcine leaching, leachate purification and impurity removal and zinc electrolytic deposition. In the process of zinc hydrometallurgy, the excessive chloride ions in the zinc electrolytic circulating solution cause great harm to the zinc electrolysis process and product quality, such as severe corrosion of the anode plate, increased impurity lead content in the product, and increased energy consumption, etc....

Claims

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Application Information

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Patent Type & Authority Applications(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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