Method for recycling tungsten in liquids after tungsten smelting exchanges

A recovery method, scheelite technology, applied in chemical instruments and methods, metallurgical wastewater treatment, process efficiency improvement, etc., can solve problems such as unsatisfactory use effect, incomplete tungsten precipitation, incomplete tungsten precipitation, etc., and achieve cost saving , The effect of low recycling process cost and mature technology
CN102912129AInactive Publication Date: 2013-02-06ZHONGXIANG TUNGSTEN IND
5 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGXIANG TUNGSTEN IND
Publication Date
2013-02-06
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention discloses a method for recycling tungsten in liquids after tungsten smelting exchanges. The method includes pH of liquids after exchanges is regulated to 8 to 10 by using sulfuric acids; calcium in liquids after a mother liquor is crystallized by using ammonium tungstate (APT) in calcium oxide or calcium hydroxide with tungsten and ammonia recycled to serve as a precipitating agent for precipitating tungsten, and a temperature of a reaction process is raised to 70 DEG C to 80 DEG C; the mixture is mixed fully to form scheelite precipitation; and filter residues are returned to a press cooking leaching process after filtration, and waste liquids are sent to a wastewater treatment process for treatment. According to the method, a method for recycling tungsten and ammonia in a tungsten smelted APT crystallization mother liquor with the application number of 20110307349.0 is combined, and partial solutions containing calcium chloride serve as precipitant materials for recycling tungsten in liquids after exchanges, accordingly, resources are recycled, salt discharges are reduced, costs for buying calcium chloride material are reduced in terms of economic benefits, and internal circulation is achieved. According to the method recycling tungsten in liquids after tungsten smelting exchanges, the technological process is simple, the tungsten precipitation rate is high, and the economic benefit is good.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to tungsten hydrometallurgy, in particular to a method for recovering tungsten in liquid after tungsten smelting and exchange. Background technique

[0002] my country is a country with abundant tungsten resources and the country with the largest tungsten smelting capacity. Tungsten resources mainly exist in the form of wolframite and scheelite. With the decreasing amount of wolframite resources, mining scheelite resources has become the main mineral variety of tungsten resource mining. Therefore, the smelting technology of scheelite has also been vigorously developed. Ascension, technical process is further improved and mature. High alkaline pressure leaching of scheelite concentrate - ion exchange process has become the main process of tungsten smelting in my country. As the awareness of resource scarcity has been widely recognized, it has become a consensus to carry out comprehensive recycling of resources. Therefore, most tu...

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