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Method for recovering copper, tungsten and molybdenum by use of APT (ammonium paratungstate) waste slag

A technology for recycling copper and waste slag, applied in the direction of improving process efficiency, etc., can solve problems such as resin poisoning, increase labor intensity, waste copper and tungsten, etc., achieve the effects of improving economic benefits, reducing resource waste, and improving utilization rate

Inactive Publication Date: 2013-05-15
陈泉兴
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AI Technical Summary

Problems solved by technology

[0003] At present, the waste slag containing copper, tungsten and molybdenum in the APT production process is mainly sold to molybdenum manufacturers in the form of by-products for single molybdenum recovery, which wastes copper and tungsten to a large extent, or returns the waste slag to the ball milling process. Co-processing with tungsten concentrate
The disadvantages of this treatment method are: ① a large amount of impurity elements in the waste residue will cause great damage to the resin in the subsequent ion exchange process, which will easily cause resin poisoning and bring greater economic losses; ② increase the labor intensity; ③ not Facilitates efficient recovery of molybdenum and copper
[0004] After searching, there are literatures reporting a method of extracting and separating tungsten and molybdenum from the tungsten-molybdenum slag produced in the production process of ammonium paratungstate and obtaining qualified APT products and molybdenum-containing slag, specifically, the method of sulfiding the ammonium paratungstate production process containing Tungsten and molybdenum slag are immersed in ammonia solution, and water vapor is passed into the crystallization pot to maintain the pressure of 0.1-0.2MPa. After the reaction, it is filtered and cooled through the plate frame, and directly enters the vulcanization tank for molybdenum removal to obtain qualified APT products and molybdenum slag; this method The disadvantage is that the copper and molybdenum metals contained in the waste residue cannot be recovered, which reduces the utilization rate of resources, and also requires another pressure equipment crystallization pot, which increases equipment investment

Method used

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  • Method for recovering copper, tungsten and molybdenum by use of APT (ammonium paratungstate) waste slag

Examples

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Embodiment 1

[0023] A method for reclaiming copper, tungsten and molybdenum by utilizing APT waste slag, the steps are as follows:

[0024] a. Grinding: Take 100kg of waste residue, of which WO 3 The content is 6%, the Mo content is 15%, and the Cu content is 24%. The waste residue containing copper, tungsten and molybdenum produced in the production process of ammonium paratungstate is ground to -325 mesh ≥ 90%.

[0025] b. Separation and recovery of copper by alkaline leaching: use a softening material with a pH value of 7.5 to filter to separate the slag containing copper from the solution containing tungsten and molybdenum; then leaching the slag containing copper with alkali, wherein the alkali is NaOH, When the alkali concentration is 35g / L, stop adding alkali, stir while raising the temperature, boil and keep warm for 1.5h, recover and obtain copper sulfide 23.11kg after washing, and the recovery rate of Cu in this step is 96.3%.

[0026] c. adopt acid leaching, precipitation purif...

Embodiment 2

[0029] A method for reclaiming copper, tungsten and molybdenum by utilizing APT waste slag, the steps are as follows:

[0030] a. Grinding: Take 100kg of waste residue, of which WO 3 The content is 6%, the Mo content is 15%, and the Cu content is 24%. The waste residue containing copper, tungsten and molybdenum produced in the production process of ammonium paratungstate is ground to -325 mesh ≥ 90%.

[0031] b. Separation and recovery of copper by alkaline leaching: use a softening material with a pH value of 8.5 to filter to separate the slag containing copper from the solution containing tungsten and molybdenum; then leaching the slag containing copper with alkali, wherein the alkali is NaOH, When the alkali concentration is 45g / L, stop adding alkali, stir while raising the temperature, boil and keep warm for 2.5h, recover and obtain copper sulfide 23.472kg after washing, and the recovery rate of Cu in this step is 97.8%.

[0032] c. adopt acid leaching, precipitation puri...

Embodiment 3

[0035] A method for reclaiming copper, tungsten and molybdenum by utilizing APT waste slag, the steps are as follows:

[0036] a. Grinding: Take 100kg of waste residue, of which WO 3 The content is 6%, the Mo content is 15%, and the Cu content is 24%. The waste residue containing copper, tungsten and molybdenum produced in the production process of ammonium paratungstate is ground to -325 mesh ≥ 90%.

[0037] b. Separation and recovery of copper by alkali leaching; use a softening material with a pH value of 8.0 to filter and separate the slag containing copper from the solution containing tungsten and molybdenum; then leaching the slag containing copper with alkali, wherein the alkali is NaOH, when When the alkali concentration is 40g / L, stop adding alkali, stir while raising the temperature, boil and keep warm for 2h, recover and obtain copper sulfide 23.352kg after washing, and the recovery rate of Cu in this step is 97.3%.

[0038]c. adopt acid leaching, precipitation pur...

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Abstract

The invention belongs to the field of resource recycling, and particularly relates to a method for recovering metals copper, tungsten and molybdenum by use of APT (ammonium paratungstate) waste slag. The invention discloses a method for recovering copper, tungsten and molybdenum by the use of APT waste slag, and comprises the following steps of: (a) powder grinding; (b) copper separation and recovery through alkaline leaching; (c) molybdenum recovery through acid leaching and precipitation purifying method; and (d) tungsten recovery through an ion exchange method. The method provided by the invention has the beneficial effects that (1) the method can recover copper, tungsten and molybdenum in the APT waste slag so as to effectively reduce resource waste and improve the utilization rate of resources; (2) the recovery rate of copper, tungsten and molybdenum is as high as about 95%; (3) by recovering the elements copper, tungsten and molybdenum in waste slag, the economic benefits of an enterprise can be increased; (4) the method can adopt the existing equipment of an enterprise without adding equipment, and thus can effectively reduce the investment in equipment and lower the cost; and (5) all solutions generated by the method are treated in subsequent processes, thereby avoiding emission problem and causing little environmental pollution.

Description

technical field [0001] The invention belongs to the field of resource recovery and reuse, and in particular relates to a method for recycling copper, tungsten and molybdenum metals by using APT (ammonium paratungstate) waste residue. Background technique [0002] Metal copper, tungsten and molybdenum are important non-ferrous metals, among which tungsten and molybdenum are not only used to make alloy steel, but also widely used in other fields such as chemical industry. Copper is used more widely, and copper is an indispensable conductive material in the electronics industry. At present, many tungsten concentrates in China contain a certain proportion of molybdenum. The resource utilization of the copper-containing tungsten-molybdenum slag produced in the APT production process can not only create profits for enterprises, but also create wealth for the country. [0003] At present, the waste slag containing copper, tungsten and molybdenum in the APT production process is ma...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C22B34/34C22B34/36
CPCY02P10/20
Inventor 陈泉兴张中山
Owner 陈泉兴
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