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Tungsten slag treatment method

A treatment method and technology of tungsten slag, which is applied in the field of tungsten slag treatment, can solve the problems of high cost and complex recovery procedures of metal elements, and achieve the effects of low recovery cost, harmless treatment, and reduced recovery cost

Active Publication Date: 2013-07-10
HUNAN RARE EARTH METAL MATERIAL RES INST
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Problems solved by technology

[0005] The present invention aims to provide a method for treating tungsten slag, so as to solve the technical problems of complex recovery procedures and high cost of metal elements in tungsten slag in the prior art

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Embodiment Construction

[0019] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] The invention provides a method for treating tungsten slag, such as figure 1 The following steps are shown: the step of dissolving the material, mixing the tungsten slag with the HCl solution of 50-65°C and 15%-30% (mass fraction), and adding a tungsten stabilizer, after the reaction is completed, filtering to obtain an acidic solution; and recovering In the step of tungsten, a weakly basic acrylic anion exchange resin is used to absorb tungsten in the acidic solution to obtain tail liquid I, and sodium hydroxide solution is used to analyze the exchange resin to obtain sodium tungstate, and tungsten is recovered from sodium tungstate. Wherein, the tungsten stabilizer refers to an additive...

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Abstract

The invention discloses a tungsten slag treatment method. The tungsten slag treatment method comprises the following steps of: dissolving: mixing tungsten slag and 15 to 30 percent HCl solution of 50 to 65 DEG C, adding a tungsten stabilizing agent, and performing filtration after the reaction is finished to obtain acid solution; and reclaiming tungsten: adsorbing the tungsten in the acid solution by adopting weak alkali acrylic acid series anion exchange resin to obtain tail solution I, resolving the exchange resin by using sodium hydroxide solution to obtain sodium tungstate, and reclaimingthe tungsten from the sodium tungstate. By using the technical scheme, the tungsten slag is leached at a low temperature under normal pressure by adopting the HCl solution, and the tungsten is directly reclaimed by a one-step method under the acid condition; and the process is simple and low in reclamation cost.

Description

technical field [0001] The invention relates to a tungsten slag treatment technology, in particular to a tungsten slag treatment method for comprehensive recovery of valuable elements from tungsten slag. Background technique [0002] my country is a country with a large amount of tungsten resources, and its tungsten reserves and mining volume rank first in the world. However, with the development of tungsten resources, my country's tungsten resources will gradually be exhausted. Not only tungsten resources, but other non-ferrous metal resources are also facing the same severe problems. The residue obtained from wolframite concentrate after alkali leaching to extract sodium tungstate is called tungsten slag. For decades, my country has accumulated millions of tons of untreated tungsten slag, and new tungsten slag is produced every year. These tungsten slags not only cause a great burden to the environment, but also waste the country's non-ferrous metal resources to a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B3/10C22B3/24C22B3/26C22B34/30C22B61/00C22B47/00
CPCY02P10/20
Inventor 刘宇晖欧阳宇平李世勇苏正夫郭海军
Owner HUNAN RARE EARTH METAL MATERIAL RES INST
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