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Method for recycling molybdenum and copper from tungsten smelting low grade molybdenum slag

A technology for removing molybdenum slag and molybdenum slag, which is applied to the improvement of process efficiency, photography process, instruments, etc., can solve the problems of high cost of extraction and crystallization consumption, long process flow, cumbersome process, etc., and achieves environmental friendliness and mature technology. , the effect of high metal recovery rate

Inactive Publication Date: 2018-05-15
江西自立环保科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0009] It can be seen from the above steps that the recovery method of molybdenum and copper in the molybdenum removal slag has a long process flow and the cost of extraction and crystallization consumption is high, and the process is cumbersome

Method used

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  • Method for recycling molybdenum and copper from tungsten smelting low grade molybdenum slag
  • Method for recycling molybdenum and copper from tungsten smelting low grade molybdenum slag

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Embodiment Construction

[0027] Such as figure 1 Shown, a kind of method that reclaims molybdenum and copper from tungsten smelting molybdenum slag, comprises the following steps:

[0028] A. Ball milling: Molybdenum removal slag fine material is obtained after ball milling and grading;

[0029] B. Molybdenum leaching: the molybdenum removal slag fine material obtained in step A is added to the leaching tank according to the liquid-solid ratio and water to mix, stir, and add alkaline solution to leaching molybdenum. filter residue, wash the filter residue with water to obtain washing water and molybdenum leaching residue, and return the washing water to the leaching ingredients to leaching molybdenum;

[0030] C, precipitated molybdenum: add calcium chloride or calcium hydroxide to the molybdenum immersion solution that step B obtains, make the molybdenum precipitation in the molybdenum solution form calcium molybdate product;

[0031] D. Copper leaching: Put the molybdenum leaching slag obtained in...

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Abstract

The invention relates to a method for recycling molybdenum and copper from tungsten smelting low grade molybdenum slag. The method comprises the following steps: ball milling, leaching of molybdenum,precipitating of molybdenum, leaching of copper and electrodeposition of copper. The alkaline leaching is subjected to alkaline leaching, so that molybdenum is obtained; molybdenum enters molybdenum leaching liquid, and copper is in molybdenum leaching slag, so that the separation of molybdenum and copper is realized; calcium chloride or calcium hydroxide is added into the molybdenum leaching liquid, and molybdenum is precipitated, so that a calcium molybdate product is obtained; the molybdenum leaching slag is subjected to pressure oxidation, and copper is leached, so that a copper-bearing solution is obtained; and the copper-bearing solution is subjected to electrodeposition, so that a cathode copper product is obtained. The method has the advantages of mature technology, environmental protection and high metal recovery rate.

Description

technical field [0001] The invention relates to the field of hydrometallurgy of nonferrous metals, in particular to a method for recovering molybdenum and copper from molybdenum-removing slag in tungsten smelting. Background technique [0002] Tungsten is a precious rare metal resource, which has been widely used because of its excellent properties such as high melting point, high hardness, wear resistance and corrosion resistance. In the tungsten smelting production process, in order to obtain high-purity tungsten products, key purification processes such as separation of tungsten and molybdenum are required. At present, the tungsten and molybdenum separation process of most tungsten smelting enterprises adopts the selective precipitation method, and the precipitate produced by this method is mainly the precipitation of copper salt containing thiomolybdate, that is, the molybdenum removal slag. With the depletion of molybdenum-containing mineral resources, the recovery and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/34C25C1/12
CPCC22B7/008C22B15/0071C22B34/34C25C1/12Y02P10/20
Inventor 柯兆华宁建平路永锁
Owner 江西自立环保科技有限公司
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