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Method for recovering sulfur element from zinc sulphide concentrate direct leaching residues

A zinc sulfide concentrate and leaching slag technology, which is applied in the direction of sulfur compounds, non-metallic elements, inorganic chemistry, etc., can solve the problems of unutilized sulfur, unfavorable environmental protection, waste, etc., and achieve the effect of reducing the amount of filter stockpile

Inactive Publication Date: 2010-06-16
CINF ENG CO LTD
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Problems solved by technology

In the industrial direct leaching zinc smelting plant, the oxygen pressure leaching slag is generally filtered and stockpiled, and the elemental sulfur is not further recovered, and the main component of the direct leaching slag of zinc concentrate is S 总 51-80%, of which elemental S 50-74%, Fe 20-2%, Pb 2-5%, Zn 1.5%-3%, the storage of slag with such a high sulfur content is not conducive to environmental protection on the one hand, and on the other hand On the one hand, the sulfur therein is not utilized, resulting in waste

Method used

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  • Method for recovering sulfur element from zinc sulphide concentrate direct leaching residues
  • Method for recovering sulfur element from zinc sulphide concentrate direct leaching residues

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Embodiment Construction

[0017] From figure 1 Can find out that technique of the present invention mainly comprises the following steps:

[0018] 1) The direct leaching slag of zinc sulfide concentrate is separated into sulfur concentrate and flotation tailings by flotation, and the flotation tailings are stockpiled after pressure filtration;

[0019] 2) obtaining the elemental sulfur filtrate after filtering, hot melting, and hot filtering the sulfur concentrate described in step 1);

[0020] 3) The elemental sulfur filtrate obtained in step 2) is kept warm and sent to a sulfur granulator for granulation.

[0021] Wherein the flotation separation process in step 1) comprises roughing, selection, sweeping, and detailed process is as follows:

[0022] The leaching slag from the zinc concentrate direct leaching process is first pumped into the roughing tank, the crude sulfur concentrate after roughing overflows into the concentrating tank, and the roughing tailings flow to the sweeping tank by itself....

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Abstract

The invention relates to a method for recovering sulfur element from zinc sulphide concentrate direct leaching residues. The method comprises the following steps of: (1) carrying out floatation separation on zinc sulphide concentrate direct leached residues to obtain sulfur concentrate and floatation tailings, and stacking floatation tailings after pressure filtration; (2) carrying out filtration, heat fusing and heat filtration on the sulfur concentrate in step (1) to obtain a sulfur element solution; and 3) keeping the temperature of the sulfur element solution in step (2), and delivering into a sulfur granulator for granulating. The invention can recover sulfur element from zinc concentrate direct leached residues, and obtain industrial sulfur through granulation, thereby reducing the filtration stacking amount of oxygen pressure leached residues, and enabling the sulfur in natural sources to be utilized and not wasted.

Description

technical field [0001] The invention relates to a process for recovering elemental sulfur from direct leaching slag of zinc sulfide concentrate. Background technique [0002] A large amount of SO is produced during the roasting process of the conventional zinc smelting process 2 The flue gas, usually will contain SO 2 The flue gas is processed by catalytic conversion to produce sulfuric acid. Therefore, the conventional zinc hydrometallurgy process has problems such as long process flow, difficult sulfuric acid sales and storage, and serious environmental pollution, especially in areas where sulfuric acid sales are difficult. Serious pollution of the local environment. In order to overcome these problems, zinc concentrate direct leaching full-wet zinc extraction technology has been developed successively at home and abroad (there are many professional technologies). In the process of direct zinc leaching, the sulfur in zinc concentrate is oxidized into monomer sulfur and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/027
Inventor 邓孟俐陈南洋何醒民宋光辉谭荣和
Owner CINF ENG CO LTD
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