Kazakhstan has developed technology to increase the amount of tungsten and bismuth extracted

       

With the priority direction of "Raw Materials and Products Processing" and the Sub-Direction Program of "Technical Genesis and Natural Material Processing Technology", experts from the National Technical University of East Kazakhstan have developed technologies to improve the production of tungsten and bismuth from the ore-bearing formations and loose deposits technology.

The main purpose of the project is to change the tungsten-based material enrichment technology based on magnetic separation to improve the technical and economic indicators of the processing. In addition, the use of gravity and dry magnetic separation method to carry out the investigation of raw materials containing tungsten is also one of the purposes. Because Kazakhstan has a wealth of tungsten-bearing raw ore (about 20 deposits), research can make it possible to process these minerals locally.

Through the research, the experts made clear the quantitative rules of the distribution of tungsten and bismuth in the processing of tungsten-containing raw materials based on gravity and dry magnetic separation methods, and proved the effectiveness of continuous application of centrifugal concentrator and magnetic separator to improve the product quality of crude tungsten content. During the experiment, as the magnetic induction value increased from 0.2t to 1.4t, the absorbed amount of tungsten and bismuth in the paramagnetic part increased from 56.08% to 67.37% by mass and 55.71% to 80.34% by mass respectively. In the non-magnetic part of the absorption of the contrary, there has been a decline, a decline of 42.37 ~ 30.61% and 33.57 ~ 13.11%. After grinding the tungsten-containing gravity concentrate on a concentrating station using a dry magnetic separation method, a product (paramagnetic fraction) containing about 48% tungsten and 13% bismuth can be obtained.

Gravity and magnetically enriched beneficiation methods are used to deal with technical causes because they do not require the use of various chemical agents. Mineral formations and loose tungsten deposits are environmentally friendly. In addition, capital construction costs can be significantly reduced by installing modular processing equipment. The modular equipment can be assembled and dismantled in a short period of time and moved to a new site, which is of practical significance for the development of small deposits.