Method for reducing and lixiviating zinc containing material by sulfur dioxide

A technology of sulfur dioxide and materials, applied in the field of metallurgy, can solve the problems of prolonged process, difficulty in proceeding, and high content of liquid zinc after reduction

Inactive Publication Date: 2016-08-03
YUNNAN HUALIAN ZINC & INDIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing zinc hydrometallurgy, zinc leaching slag has a high zinc content. If rotary kiln and other equipment are used to process zinc leaching slag, the operating environment is bad, and it is a backward process facing elimination.
If the side-blowing furnace is used to treat zinc leaching slag, it will face the problem of high energy consumption
[0003] According to the introduction of the patent application with the application number 201110286158.6, the reduction leaching of zinc sulfide concentrate, due to the addition of zinc sulfide, leads to a high content of liquid zinc after reduction, reaching 100-110g / L, which will lead to serious fouling in the later hematite mine section. difficult to proceed
Moreover, the reduction of zinc sulfide concentrate still has the defects of high slag rate and organic matter. If the elemental sulfur in the slag is separated, it will face problems such as increasing equipment and prolonging the process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 5.7 kg of zinc-containing material containing 37.37wt% iron and 18.18wt% zinc was added to 29L zinc waste electrolyte. The zinc waste electrolyte is used as an acid leaching agent, and the concentration of zinc in the waste zinc electrolyte is 53 g / L and the concentration of sulfuric acid is 158 g / L.

[0043] 400L of sulfur dioxide was added as a reducing agent to the mixture of the zinc waste electrolyte and the zinc-containing material, and the zinc-containing material was subjected to sulfur dioxide reduction leaching at a temperature of 100° C. for 1 hour. That is to say, sulfur dioxide is added to the mixture of the zinc waste electrolyte and the zinc-containing material at a flow rate of 400 L / hour.

[0044] Then, continue to use the acidic leaching agent to leach the zinc-containing material at a temperature of 110° C. for 1 hour to obtain 43 L of leachate (ie, sulfur dioxide reduction leachate). Finally, a sulfur dioxide scrubber is used to scrub the tail gas discha...

Embodiment 2

[0047] Add 5.0 kg of a zinc-containing material containing 37.37wt% iron and 18.18wt% zinc and 3.8L of water to 28.7L of zinc waste electrolyte. The zinc waste electrolyte is used as an acid leaching agent, and the zinc concentration in the zinc waste electrolyte is 49 g / L and the concentration of sulfuric acid is 155 g / L.

[0048] 475L of sulfur dioxide was added as a reducing agent to the mixture of the zinc waste electrolyte and the zinc-containing material, and the zinc-containing material was subjected to sulfur dioxide reduction leaching at a temperature of 125° C. for 2 hours. In other words, sulfur dioxide is added to the mixture of the zinc waste electrolyte and the zinc-containing material at a flow rate of 237.5 L / hour.

[0049] Then, continue to use the acidic leaching agent to leach the zinc-containing material at a temperature of 150° C. for 2 hours to obtain 40 L of leachate. Finally, a sulfur dioxide scrubber is used to scrub the tail gas discharged from the leachi...

Embodiment 3

[0052] Add 5.0 kg of zinc-containing material containing 37.37wt% iron and 18.18wt% zinc and 7.3L water into 25.5L zinc waste electrolyte. The zinc waste electrolyte is used as an acid leaching agent, and the zinc concentration in the zinc waste electrolyte is 49 g / L and the concentration of sulfuric acid is 155 g / L.

[0053] 544L of sulfur dioxide was added as a reducing agent to the mixture of the zinc waste electrolyte and the zinc-containing material, and the zinc-containing material was subjected to sulfur dioxide reduction leaching at a temperature of 150° C. for 4 hours. In other words, sulfur dioxide is added to the mixture of the zinc waste electrolyte and the zinc-containing material at a flow rate of 136L / hour.

[0054] Then, continue to use the acidic leaching agent to leach the zinc-containing material at a temperature of 130° C. for 4 hours to obtain 40 L of leachate. Finally, the scrubber is used to scrub the tail gas discharged from the leaching device, and the scr...

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Abstract

The invention discloses a method for reducing and lixiviating zinc containing material by sulfur dioxide. The method comprises the following steps: adding the zinc containing material into an acid lixiviant to lixiviate the zinc containing material by the acid lixiviant; in the process of lixiviating, introducing sulfur dioxide through the mixture of the acid lixiviant and the zinc containing material to realize reduction and lixiviation by sulfur dioxide. The method in the embodiment of the invention achieves the advantages of high zinc and ferrum lixiviation rate, low slag rate and high adaptability to raw materials, i.e. the method is suitable for processing various zinc containing materials; the method can reduce the possibility that organics and foreign ions enter the system, achieves the advantages of no elemental sulfur and high lead/silver enrichment degree, also can optimize the subsequent technical flow and reduce equipment investment and energy consumption.

Description

Technical field [0001] The invention relates to the field of metallurgy, and in particular to a method for reducing and leaching zinc-containing materials by using sulfur dioxide. Background technique [0002] The treatment methods of zinc-containing materials can be summarized as follows: zinc sulfide concentrate reduction method, rotary kiln fuming method, combined beneficiation and smelting method, hot acid leaching-precipitation method, smelting-extraction method, chlorination fuming method, etc. . In the existing zinc hydrometallurgy, the zinc content of the zinc leaching slag is high. If the zinc leaching slag is treated with rotary kiln and other equipment, the operating environment is bad, and it is a backward process facing elimination. If the side-blowing furnace is used to process the zinc leaching slag, it will face the problem of high energy consumption. [0003] According to the patent application with the application number 201110286158.6, the zinc sulfide concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B3/44C22B19/20
CPCC22B3/06C22B3/44C22B19/22Y02P10/20
Inventor 朱北平姚应雄王邦伟李云陈先友王私富王亚尹华光周大国曹元庆李彪宋永平
Owner YUNNAN HUALIAN ZINC & INDIUM
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