Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for extracting tungsten from scheelite

A scheelite and roasting technology, applied in the field of tungsten extraction, can solve problems such as low production efficiency and safety problems, and achieve the effect of convenient operation

Active Publication Date: 2016-09-28
赣州海盛钨业股份有限公司
View PDF6 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country's scheelite smelting mainly adopts high-pressure alkali decomposition process. Whether it is the previous sodium carbonate pressure cooking method or the current mainstream sodium hydroxide pressure cooking method, the decomposition of scheelite can only be achieved under high pressure conditions. The pressure is usually 6- About 18 kg, which often brings safety problems; at the same time, the production is intermittently operated in a single kettle, and the production efficiency is low

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 extracting tungsten from scheelite
  • Method for extracting tungsten from scheelite
  • Method for extracting tungsten from scheelite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0030] Embodiment 2: scheelite contains 70.32% WO 3 . The weight of scheelite is 100g, 2 times the theoretical amount of sodium phosphate, 2 times the theoretical amount of calcium fluoride, roasted at 500°C for 2 hours, the roasted product is stirred and leached with water, the liquid-solid ratio is 3:1, the temperature is room temperature, kept for 2 hours, filtered , washed with water, dried, the slag contains insoluble WO 3 It is 18.57%, and the decomposition rate reaches 57.31%.

Embodiment 3

[0031] Embodiment 3: scheelite contains 30.35% WO 3 . The weight of scheelite is 80g, 3.5 times the theoretical amount of sodium phosphate, roasted at 850°C for 2 hours, 6 times the theoretical amount of calcium fluoride, the roasted product is stirred and leached with water, the liquid-solid ratio is 4:1, the temperature is 50°C, kept for 3 hours, filtered , washed with water, dried, the slag contains insoluble WO 3 It is 1.37%, and the decomposition rate reaches 96.39%.

Embodiment 4

[0032] Embodiment 4: scheelite contains 56.32% WO 3 . The weight of scheelite is 120g, 2.5 times the theoretical amount of sodium phosphate, 5 times the theoretical amount of calcium fluoride, roasted at 650°C for 3 hours, the roasted product is stirred and leached with water, the liquid-solid ratio is 6:1, the temperature is 90°C, kept for 4 hours, filtered , washed with water, dried, the slag contains insoluble WO 3 It is 1.09%, and the decomposition rate reaches 98.48%.

[0033] From the above test data, it can be concluded that the method for extracting tungsten from scheelite provided by the present invention, compared with the existing process of decomposing scheelite, can react under normal pressure environment, and it is easy to realize continuous production and operation. It is more convenient and safe, and the insoluble WO contained in the slag 3 extremely low.

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 relates to a method for extracting tungsten from scheelite. The method comprises steps as follows: Step 1: the scheelite is ground to have the mesh number smaller than 325; Step 2: the ground scheelite is mixed with solid sodium phosphate and solid calcium fluoride, and a mixture is obtained; Step 3: the mixture is placed in a high-temperature furnace for calcination, and a calcination material is obtained; Step 4: the calcination material is subjected to water leaching treatment, a sodium tungstate solution is obtained, and the tungsten is extracted from the scheelite. According to the method for extracting the tungsten from the scheelite, reactions can be conducted in a normal-pressure environment, high-pressure equipment is not required, continuous production can be realized easily, and the method is more convenient and safer to operate.

Description

technical field [0001] The invention relates to a method for extracting tungsten from scheelite, and relates to the field of mineral extraction. Background technique [0002] Two-thirds of the total tungsten resources in my country are scheelite. With the continuous consumption of black tungsten resources, scheelite has become the main raw material of tungsten industry. [0003] my country's scheelite smelting mainly adopts high-pressure alkali decomposition process. Whether it is the previous sodium carbonate pressure cooking method or the current mainstream sodium hydroxide pressure cooking method, the decomposition of scheelite can only be achieved under high pressure conditions. The pressure is usually 6- About 18 kg, which often brings safety problems; at the same time, the production is intermittent operation of single kettle, and the production efficiency is low. [0004] Therefore, it is necessary to design a method for extracting tungsten from scheelite to overcome...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B1/00C22B3/04C22B34/36
CPCC22B1/00C22B1/02C22B3/04C22B34/36Y02P10/20
Inventor 梁勇梁鑫刘元鑫邹瑜黎永康赵中伟
Owner 赣州海盛钨业股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com