Method for improving grade of fluorite concentrate

Abstract

The invention discloses a method for improving the grade of fluorite concentrate. The method comprises: adding an adjusting agent into a fluorite ore after ore grinding to obtain a first fluorite oreslurry; adding an inhibitor, an activator and a collector into the first fluorite ore slurry to obtain a second fluorite ore slurry and a first tailings; performing ore grinding treatment on the second fluorite ore slurry to obtain a third fluorite ore slurry; adding an inhibitor, an activator and a collector into the third fluorite ore slurry to obtain a fourth fluorite ore slurry and a second tailings; and adding an inhibitor into the fourth fluorite ore slurry to obtain the fluorite concentrate. In the method provided by the invention, a pH value of the ore slurry is adjusted through the adjusting agent, then the fluorite ore is subjected to concentration and scavenging for several times through addition of the inhibitors, the activators and the collectors, and then the grade of the fluorite concentrate is improved, an impurity content of the fluorite ore is reduced, and at the same time, the problems of large middling circulation amount, low separation efficiency, and unstable flotation in the production can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of minerals, and in particular relates to a method for improving the grade of fluorite concentrate. Background technique [0002] With the development of the economy, as an important strategic resource, the development and utilization of fluorite has a very broad prospect. On the other hand, there is a huge gap between the supply and demand of fluorite resources in my country. Moreover, the outcrops, shallow mines and known mines that are easy to find are decreasing day by day, so the difficulty of finding mines is increasing. [0003] At present, fluorine-containing fluorite ore is the only raw material for the production of hydrofluoric acid, and it is also the basic raw material for steel, aluminum, glass and other industries. There are three main types of fluorite mines in nature, namely quartz-fluorite type, quartz-fluorite-barite type, quartz-fluorite-calcite type (or quartz-fluorite-carbonate type). ...

AI Technical Summary

Problems solved by technology

Generally, the grade of high-calcium fluorite ore is difficult to improve

[0004] For high-calcium fluorite ore (such as calcium carbonate-fluorite ore), the existing technology generally adopts the separation method of pumice fluorite to suppress calcite. Since the surface physical and chemical properties of fluorite ore and calcium carbonate are similar, and their dissolution properties are similar, it is easy to cause There are many problems such as high circulation volume of medium ore, poor separation effect, many times of beneficiation, low grade of fluorite concentrate, excessive impurities in fluorite concentrate, low recovery rate, etc.

Images