Method for recovering rhenium from arsenic filter cake

A filter cake, potassium perrhenate technology, applied in the direction of improving process efficiency, can solve the problems of high cost, long process, low rhenium recovery rate and the like, and achieve the effects of low cost, short process and short processing process
CN102433439AInactive Publication Date: 2012-05-02HUNAN RES INST FOR NONFERROUS METALS +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUNAN RES INST FOR NONFERROUS METALS
Publication Date
2012-05-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for recovering rhenium from an arsenic filter cake. The method comprises the following steps: entering rhenium, arsenic and sulfur into a solution by adopting one-section alkali leaching and second-section oxidization and leaching, and simultaneously enriching lead, bismuth, copper and selenium in leaching slag; in the one-section leachate, converting rhenium into perrhenate in a form of sodium thioperrhenate by adopting an oxidization method, converting sodium thioarsenate into sodium arsenate, and separating out sulfur in a form of simple substance sulfur; removing arsenic from the solution obtained by oxidization conversion by using a sulfur dioxide reduction method or lime method; carrying out rhenium enrichment on the solution obtained after arsenic isremoved; treating a rhenium reextraction liquid by using a potassium chloride precipitation method to obtain crude potassium perrhenate; and refining crude potassium perrhenate to obtain potassium perrhenate. The method has short process flow, high rhenium recovery rate and low treatment cost; and by using the method, the comprehensive utilization of valuable metals in the arsenic filter cake canbe realized.
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Description

technical field

[0001] The invention belongs to the technical field of nonferrous metallurgy and environmental treatment, and relates to a new method for recovering rhenium from arsenic-containing materials, in particular to recover rhenium by using arsenic filter cake produced by a pyrometallurgy copper smelting acid production system as a raw material. Background technique

[0002] The main raw material for extracting rhenium: There are few individual rhenium minerals in nature. It mainly exists in molybdenite in the form of sulfide, and molybdenite often coexists with copper sulfide ore. During the mining process of copper sulfide ore, rhenium is enriched in copper sulfide concentrate and brought into the copper pyro-smelting system. During the pyro-smelting process of copper, more than 82% of rhenium volatilizes into the waste acid stock solution of the flue gas acid system, and more than 94% of it enters the arsenic filter cake in the form of sulfide. Rhenium also exis...

Claims

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