Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

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
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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. Although this has increased the output of tungsten to a certain extent, there are still relatively single types of recovery of valuable metals. , high energy consumption and other limitations

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0038] ⑴Put the tungsten slag through wet ball milling to produce fine powder slurry;

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

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

[0041] (3) Separating the solid-liquid of the ore pulp after the ozone alkali leaching reaction in step (2), adjusting the pH value of the filtrate to 8-9 with hydrochloric acid or sulfuric acid, filtering to remove silicon, and recovering artificial scheelite with calcium chloride precipitation;

[0042] In the process of using ozone alkali leaching, ozone acts as an oxidizing agent to oxidize metals in tungsten slag into oxides, which is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products