Changsha Mining and Metallurgy Research Institute has overcome the world's problems in fluorite recovery technology, and the concentrate grade can reach 93%!
On December 12th, the Changsha Research Institute of Mining and Metallurgy undertaken the “Complicated Associated Fluorite Low- Frequency Efficient Flotation Technology†project, which was officially put into operation through acceptance. This means that the world of complex complex fluorite recovery has made a major breakthrough.
Hunan Chenzhou Shizhuyuan is a very rare variety of non-ferrous metals enrichment, in which associated fluorite resources reserves of nearly 100 million tons, accounting for 70% of the total associated fluorite, potentially worth up to 220 billion yuan or more. After the pre-multi-metal beneficiation , the tailings contain a large amount of unrecovered fluorite resources, but there are problems such as low main grade, high impurity content, and multi-metal ore dressing residual agent have great interference on fluorite flotation effect, and its purification and recycling has become a recognized problem in the industry. It has been included in the national science and technology research plan for many times.
In order to make full use of the fluorite resources of the Shizhuyuan tailings, Hunan Nonferrous Luzhou Fluorine Chemical Co., Ltd. organized a special research, but limited by technology, the grade of fluorite concentrate recovered from tailings in recent years is only 88%, and the recovery rate is about 45. %, the recovered fluorite concentrate is difficult to meet the requirements of chemical grade industrial applications.
Subsequently, the Changsha Research Institute of Mining and Metallurgy initiated the research on the comprehensive recovery of associated fluorite. After five years of research, it has formed a complete set of complex associated fluorite recovery technology:
According to the optimal flotation separation range different from fluorite and gangue, the original step-by-step inhibition process improves the grade of fluorite concentrate;
Develop new stripping technology to improve the surface properties of fluorite, enhance its floatability and increase recovery rate;
Innovative fluorite flotation agent solves the difficulty of low temperature and acid and alkali resistance of conventional fluorite flotation agents, resulting in unstable fluorite recovery effect.
In August 2016, Hunan Nonferrous Luzhou Fluorine Chemical Co., Ltd. launched an industrial test on the results of the research, and both the quality and output of fluorite concentrates increased. At present, the concentrate grade can reach more than 93%, and the recovery rate can reach more than 70%, which has already reached the world leading level.
This technological breakthrough provides raw material guarantee for the production of downstream products. It is expected that the company will produce 43,000 tons of anhydrous hydrogen fluoride and 40,000 tons of fluorite pellets throughout the year, and all production indicators will record a record high. In 2017, the company will realize a profit of 90 million yuan, a record high.
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