Method for leaching zinc-containing ores

An ore and leaching technology, applied in the field of leaching of zinc-containing ores, can solve the problems of being unsuitable for large-scale industrial applications, secondary environmental pollution, and high production costs, and achieve the effects of reducing production costs, reducing pollution, and reducing environmental pollution.

Active Publication Date: 2010-06-30
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

In this patent application, a large amount of organic solvent needs to be used, which is easy to cause secondary pollution to the environment
And in this method kind needs to use the resin column, therefore the production cost is high, is not suitable for the large-scale industrial application

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  • Method for leaching zinc-containing ores
  • Method for leaching zinc-containing ores
  • Method for leaching zinc-containing ores

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, and the embodiments described below by referring to the accompanying drawings are exemplary, are only used to explain the present invention, and cannot be construed as explanations for the present invention. limit.

[0028] It should be noted that the term "calcium oxide and / or calcium hydroxide" in the present invention means that calcium oxide (quicklime) or calcium hydroxide (slaked lime) can be used, or a mixture of the two can be added. In actual operation, quicklime (CaO) can be digested with water to obtain milk of lime, the main reaction is CaO+H 2 O=Ca(OH) 2 , milk of lime is used as a mixture of calcium oxide and calcium hydroxide.

[0029] In addition, in the present invention, the term "valuable metals" refers to other metals that have recycling value except main metals in the raw materials for refining metals. Generally speaking, ...

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Abstract

The invention provides a method for leaching zinc-containing ores, comprising the following steps: A) mixing the zinc-containing ores with sulfuric acid solution to leach sulfuric acid so as to obtain leachate containing zinc sulfate; B) purifying the leachate to obtain zinc sulfate solution; C) mixing the zinc sulfate solution with calcium oxide and/or calcium hydroxide as well as calcium sulfate used as seed crystal to generate calcium sulfate precipitation and calcium hydroxide precipitation; and D) separating the calcium sulfate and the zinc hydroxide. The invention can recycle metallic elements from the zinc-containing ores with low cost and low pollution, recycle resources and additionally produce the calcium sulfate (gypsum), thereby reducing production cost and mitigating environmental pollution.

Description

technical field [0001] The invention relates to a hydrometallurgy process, more specifically, to a method for leaching zinc-containing ores. Background technique [0002] Traditionally ore smelting is carried out by pyrometallurgy process. In recent years, hydrometallurgy technology has been developed. Because hydrometallurgy can effectively reduce environmental pollution and can be applied to many different mines, it is gradually replacing pyrometallurgy. [0003] The current hydrometallurgy process mostly adopts the sulfuric acid leaching method, which can leach various metal elements contained in the ore. If these metal elements cannot be recovered, it will be a great waste, and some components in the leachate may also cause harm to the human body. For example, when leaching zinc-containing ores, a large amount of solution containing zinc sulfate will be produced. The traditional treatment method is to heat and evaporate the solution containing zinc sulfate to obtain z...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B19/20
CPCY02P10/20
Inventor 王魁珽刘金山陆业大高保军
Owner CHINA ENFI ENGINEERING CORPORATION
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