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Process for extracting metal zinc from high-chlorine-content and high-zinc-content soot

A technology for extracting metals and processes, applied in the technical field of zinc recovery, can solve the problems of difficult to meet the electrolysis operation, unfavorable long-term development, high processing cost, and achieve the improvement of impurity removal rate and impurity removal rate, low cost, and improved particle size. Effect

Active Publication Date: 2019-04-05
江西新金叶实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simply smelting and extracting zinc from zinc ore can no longer meet the existing needs of the society. Therefore, realizing the recycling of zinc is an important research direction to meet market demand and sustainable development
[0003] High-chlorine-containing zinc soot is a common smelting soot in smelters at present, which contains a large amount of metal zinc, which has recycling value; the traditional process of extracting zinc from high-chloride zinc Chlorine soot is sold outside. The dechlorinated zinc soot is treated by ball milling (dry + wet). After treatment, leaching + impurity removal + purification + electrowinning process is used to produce metal zinc; this process not only has a long process and low recovery efficiency, but also Using the fire method to remove chlorine not only causes a lot of secondary pollution, but also has a low removal rate. The zinc solution finally sent to the electrolysis contains 2-20g / L of chloride ions, which is difficult to meet the needs of the electrolysis operation. The treatment cost is high, and the grade of zinc is low. It is beneficial to long-term development; therefore, it is the main direction of research in this industry to study a process for extracting metal zinc from high-chloride zinc soot with simple process and high recovery efficiency

Method used

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  • Process for extracting metal zinc from high-chlorine-content and high-zinc-content soot
  • Process for extracting metal zinc from high-chlorine-content and high-zinc-content soot

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A process for extracting metal zinc from high chlorine-containing zinc soot, specifically:

[0023] Chlorine elution with zinc ash and alkali: the above-mentioned high chlorine-containing zinc soot recovery material is used in the countercurrent washing process of "one stage of alkali washing and one stage of water washing"; specifically, the washing liquid of the zinc ash alkali washing section is used as the pulping liquid for the zinc ash alkali washing, and the water washing The process uses new water as the pulping liquid; the washing time of alkali washing is 2 hours, the washing temperature is 85 °C, and the liquid-solid mass ratio is 3:1; the washing time of the water washing process is 1 hour, the washing temperature is 80 °C, and the liquid-solid mass ratio is 3 : 1; the washing liquid and the washing material are collected, the washing material is sent to leaching, and the washing liquid is evaporated and concentrated to obtain sodium chloride;

[0024] Leach...

Embodiment 2

[0031] A process for extracting metal zinc from high chlorine-containing zinc soot, specifically:

[0032] Chlorine elution with zinc ash and alkali: the above-mentioned high chlorine-containing zinc soot recovery material is used in the countercurrent washing process of "one stage of alkali washing and one stage of water washing"; specifically, the washing liquid of the zinc ash alkali washing section is used as the pulping liquid for the zinc ash alkali washing, and the water washing The process uses fresh water as the pulping liquid; the washing time of alkali washing is 2 hours, the washing temperature is 80 °C, and the liquid-solid mass ratio is 3:1; the washing time of the water washing process is 1 hour, the washing temperature is 80 °C, and the liquid-solid mass ratio is 3 : 1; the washing liquid and the washing material are collected, the washing material is sent to leaching, and the washing liquid is evaporated and concentrated to obtain sodium chloride;

[0033] Lea...

Embodiment 3

[0040] A process for extracting metal zinc from high chlorine-containing zinc soot, specifically:

[0041] Chlorine elution with zinc ash and alkali: the above-mentioned high chlorine-containing zinc soot recovery material is used in the countercurrent washing process of "one stage of alkali washing and one stage of water washing"; specifically, the washing liquid of the zinc ash alkali washing section is used as the pulping liquid for the zinc ash alkali washing, and the water washing The process uses new water as the pulping liquid; the washing time of alkali washing is 2 hours, the washing temperature is 90 ° C, and the liquid-solid mass ratio is 3:1; the washing time of the water washing process is 1 hour, the washing temperature is 80 ° C, and the liquid-solid mass ratio is 3 : 1; the washing liquid and the washing material are collected, the washing material is sent to leaching, and the washing liquid is evaporated and concentrated to obtain sodium chloride;

[0042] Lea...

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Abstract

The invention discloses a process for extracting metal zinc from high-chlorine-content and high-zinc-content soot. The process comprises the steps of zinc containing soot alkali washing dechlorinating, leaching, purification and impurity removal through a goethite-like method, copper salt deep dechlorination, three-segment purification, electrodeposition and casting. By means of the process, the wet alkali washing dechlorinating process is adopted, wastewater zero discharging is achieved, compared with a traditional pyrogenic process, the dechlorination process is simple, and the chlorine removal rate is high; through the specific leaching process, the zinc recovery rate is effectively increased; and the goethite-like method is adopted for purification and impurity removal, modified magnesium diboride is added, three-segment antimonic salt continuous purification treatment is achieved in combination, the impurity removal rate and the removal rate are effectively increased, and the zincrecovery efficiency and the grade are high.

Description

technical field [0001] The invention relates to a process for recovering zinc, in particular to a process for extracting metallic zinc from high chlorine-containing zinc soot. Background technique [0002] In recent years, the global zinc concentrate supply has decreased significantly, and the global zinc concentrate inventory has been consumed in large quantities. The current zinc concentrate inventory is at a low level. Simply smelting and extracting zinc from zinc ore can no longer meet the existing needs of the society. Therefore, realizing the recycling of zinc is an important research direction to meet market demand and sustainable development. [0003] High-chlorine-containing zinc soot is a common smelting soot in smelters at present, which contains a large amount of metal zinc, which has recycling value; the traditional process of extracting zinc from high-chloride zinc Chlorine soot is sold outside. The dechlorinated zinc soot is treated by ball milling (dry + wet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B19/30C22B19/20C25C1/16
CPCC22B7/007C22B7/02C22B19/22C22B19/26C22B19/30C25C1/16Y02P10/20
Inventor 叶礼平余林林知奎
Owner 江西新金叶实业有限公司
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