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Method for removing chlorine from chlorine-containing zinc sulfate solution

A zinc sulfate solution, a technology for removing chlorine, applied in the improvement of process efficiency, instruments, optics, etc., can solve the problems of large economic burden, low chlorine removal efficiency, and large water consumption for resin regeneration.

Active Publication Date: 2013-04-24
YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only has a low chlorine removal efficiency of only about 50%, but also consumes a lot of water for resin regeneration, and the chlorine ion content of the regenerated liquid is low, which brings a greater economic burden to the next step of regenerated liquid treatment.

Method used

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  • Method for removing chlorine from chlorine-containing zinc sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Chlorine extraction: the prepared organic phase [11lv% trialkyl tertiary amine + 5lv% n-octanol + 260 # Kerosene (volume to volume)] and zinc electrolyte solution after acidification (chemical composition Zn of zinc electrolysis solution after acidification: 113.32g / L, H 2 SO 4 : 91.64g / L, Cl - : 2.55g / L) The flow rate of the organic phase is 110mL / min, the flow rate of the zinc electrolyte is 220mL / min, pumped into the self-made extraction tank with a constant flow pump for 5-stage countercurrent series extraction of Cl - ,Phase. The extraction mixing time was 1 min, the phase separation time was 3 min, and the phase ratio was 2 / 1 (water to organic phase). Analyze raffinate and negative chlorine organic phase (raffinate Zn: 112.45g / L, H 2 SO 4 : 85.73g / L, Cl - : 285.30mg / L. Negative chlorine organic phase Zn: 1.82g / L, Cl - : 4.62g / L, SO 4 2- : 10.62g / L), Cl - The extraction removal rate of 88.84wt%. After the raffinate is adsorbed by activated carbon, it...

Embodiment 2

[0032] 1. Chlorine extraction: Combine the returned empty organic phase and the acidified zinc electrolytic solution (the chemical composition of the zinc electrolytic solution after acidification is Zn: 117.16g / L, H 2 SO 4 : 73.29g / L, Cl - : 3.00g / L) The flow rate of the organic phase is 110mL / min, the flow rate of the zinc electrolyte is 220mL / min, and pumped into the self-made extraction tank with a constant flow pump for 5-stage countercurrent series extraction and phase separation. The extraction mixing time was 1 min, the phase separation time was 3 min, and the phase ratio was 2 / 1 (water to organic phase). Analyze raffinate and negative chlorine organic phase (raffinate Zn: 116.24g / L, H 2 SO 4 : 67.18g / L, Cl - : 273.51mg / L. Negative chlorine organic phase Zn: 1.31g / L, Cl - : 5.04g / L, SO 4 2- : 15.15g / L), Cl - The extraction removal rate of 90.88wt%. After the raffinate is adsorbed by activated carbon, it is sent to deposit zinc.

[0033] 2. Negative chlor...

Embodiment 3

[0037] 1. Chlorine extraction: The prepared organic phase [8lv% trialkyl tertiary amine + 5lv% n-octanol + 260 # Kerosene (volume to volume)] and acidified zinc electrolysis solution (chemical composition of zinc electrolysis solution after acidification Zn: 99.89g / L, H 2 SO 4 : 5.82g / L, Cl - : 2.57g / L) The flow rate of the organic phase is 50mL / min, the flow rate of the zinc electrolyte is 300mL / min, pumped into the self-made extraction tank with a constant flow pump for 7-stage countercurrent series extraction of Cl - ,Phase. The extraction mixing time was 1 min, the phase separation time was 3 min, and the phase ratio was 5 / 1 (water to organic phase). Analyze raffinate and negative chlorine organic phase (raffinate Zn: 98.78g / L, H 2 SO 4 : 1.14g / L, Cl - : 192.34mg / L. Negative chlorine organic phase Zn: 4.11g / L, Cl - : 11.51g / L, SO 4 2- : 2.76g / L), Cl - The extraction removal rate of 92.53wt%. After the raffinate is adsorbed by activated carbon, it is sent to...

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Abstract

The invention belongs to the technical field of wet metallurgy, in particular relates to a method for purifying and separating chloride ions from a chlorine-containing zinc sulfate solution generated in a zinc electrolyzing process. The method comprises the following steps: (1) forming an organic extraction phase by using trialkyl tertiary amine, octyl alcohol and sulfonated kerosene 260 #, and stirring and mixing the organic extraction phase into an acid solution containing chloride zinc sulfate, thereby separating out a chloride-loaded organic phase and a low-chloride-content extraction raffinate; (2) deoiling and adsorbing the low-chloride-content extraction raffinate and then sending to an electric zinc accumulating process; (3) mixing the chloride-loaded organic phase into an extraction raffinate in a zinc extracting process, and sending an obtained subsequent fluid in which SO42 is removed into an zinc extracting system to perform a mineral leaching while stirring and mixing an obtained organic phase into a sodium carbonate solution to perform a reverse extraction; (4) returning a no-load organic phase obtained by the reverse extraction process to the step (1) to be recycled; utilizing two-hydrated alkali type zinc carbonate (a reverse extraction sediment) as a zinc mineral resource; separating out a two-hydrated alkali type zinc carbonate sediment from a reverse extraction subsequent fluid; carrying out a recycling reverse extraction by adding sodium carbonate to a clear solution; and after enabling the chloride (Cl) to reach a setting concentration, evaporating and crystallizing the chloride to obtain an industry body NaCl (sodium chloride). The method provided by the invention is low in cost, high in efficiency and easy to control and free of the discharge of 'three wastes'.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for purifying and separating chloride ions in a chlorine-containing zinc sulfate solution produced in a zinc electrolysis process. Background technique [0002] In the field of zinc hydrometallurgy, for a long time, the purification and separation of chlorine ions in chlorine-containing zinc sulfate solution has mainly been carried out, silver chloride precipitation method, copper slag dechlorination method and ion exchange method. [0003] ①The silver chloride precipitation method is as follows: [0004] Main reaction formula: . [0005] The silver chloride precipitation method is to add silver sulfate to the chlorine-containing solution, and react with chloride ions to form insoluble silver chloride precipitation. Although the method is simple to operate and has good chlorine removal effect, it is economically unreasonable because the price of s...

Claims

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Application Information

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IPC IPC(8): C22B3/40C25C1/16
CPCY02P10/20
Inventor 罗玉德
Owner YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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