Method for separating and recycling valuable metal in tungsten slag

A technology for the separation and recovery of valuable metals, applied in the direction of improving process efficiency, can solve the problems of single recovery species and high energy consumption, and achieve the effects of high production efficiency, low energy consumption, and easy realization

Active Publication Date: 2015-12-16
湖南金鑫新材料股份有限公司
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  • Application Information

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Problems solved by technology

For the recovery of valuable metals in tungsten slag, at present, mineral processing, high-pressure alkali leaching, soda roasting, hydrochloric acid leaching, etc. are mainly used. Altho

Method used

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  • Method for separating and recycling valuable metal in tungsten slag
  • Method for separating and recycling valuable metal in tungsten slag
  • Method for separating and recycling valuable metal in tungsten slag

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[0036] Example 1:

[0037] A method for separating and recovering valuable metals in tungsten slag, comprising the following steps:

[0038] (1) The tungsten slag is subjected to wet ball milling to obtain fine powder slurry;

[0039] In the present invention, in step (1), the granularity of the fine powder ore pulp is -100 mesh.

[0040] (2) Add liquid caustic soda to the fine powder ore pulp prepared in step (1) to prepare 1N~3N alkaline ore pulp, start stirring, heat up to 80°C with steam, introduce ozone, keep the temperature not lower than 80°C, and react for 1 hour~ 2 hours;

[0041] (3) Carry out solid-liquid separation of the ore pulp after the ozone alkali leaching reaction in step (2), adjust the pH of the filtrate to 8-9 with hydrochloric acid or sulfuric acid, filter and remove silicon, and recover artificial scheelite with calcium chloride precipitation;

[0042] In the process of using ozone alkali leaching, ozone is used as an oxidant to oxidize the metal in ...

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Abstract

The invention discloses a method for separating and recycling valuable metal in tungsten slag. The method can be used for recycling artificial scheelite, electronic-grade cobalt chloride, silver sponges, copper sponges, nickel carbonate and low-grade tantalum-niobium ore from the polymetallic tungsten slag. The method comprises the steps that the tungsten slag is subjected to ball milling in a wet mode to obtain fine powder slurry; tungsten is separated and recycled through an ozone alkali leaching method; nickel, cobalt and copper are separated and recycled through a hydrochloric acid leaching method; silver is recycled through a hydrochloric acid complexing leaching method; a leaching agent obtained in the hydrochloric acid leaching procedure is subjected to deironing and calcium-magnesium removal through fluoride in a sodium jarosite method to obtain pre-extraction liquid, the pre-extraction liquid is subjected to P204 extraction, copper, manganese and zinc are separated through deep purification, and the electronic-grade cobalt chloride is obtained by separating nickel and cobalt from sodium ions through P507 extraction. By the adoption of the ozone alkali leaching technology, by-products only produce O2 and H2O, no harmful effect is generated on the environment, tungsten, cobalt, copper, nickel, silver, tantalum and niobium can be separated efficiently, the recovery rate is high, and the comprehensive recycling effect is good; moreover, energy consumption is low, and the method is environmentally friendly, simple, easy to implement and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for separating and recovering valuable metals from tungsten slag, in particular to a method for recovering artificial scheelite, electronic-grade cobalt chloride, and silver sponge from polymetallic tungsten slag. A method for separating and recovering valuable metals from tungsten slag, sponge copper, nickel carbonate and low-grade tantalum-niobium ore. Background technique [0002] Tungsten slag is produced during the tungsten smelting process, that is, tungsten ore and waste cemented carbide tungsten raw materials are wet-decomposed in high temperature or aqueous solution to obtain primary tungsten products (sodium tungstate, ammonium paratungstate) and solid waste slag (ie tungsten slag). [0003] Under normal circumstances, using standard tungsten concentrate as raw material, every output 1tWo 3 At the same time, about 0.8t tungsten slag (including Wo 3 2﹪...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B34/36C22B15/00C22B11/00C22B23/00
CPCY02P10/20
Inventor 杨小中高招辉段友存
Owner 湖南金鑫新材料股份有限公司
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