Method for selectively milling cassiterite multi-metal sulfides ores

Abstract

The invention discloses a method for selectively milling cassiterite multi-metal sulfides ores. In the method, by utilizing the hydrophily / hydrophobicity difference between the surface of cassiterite and the surfaces of sulfides ores such as pyrite, pyrrhotite, blende and jamesonite, and by adding a floating agent in a milling process, floatation separation of cassiterite and the sulfides ores in ores can be realized under a condition of larger milling granularity by using a floatation method. The method disclosed by the invention can be adopted for treating the cassiterite multi-metal sulfides ore which contains 0.5 to 1 percent of Sn and 12 to 17 percent of S; and by adopting the method, the ore milling granularity required in floatation can be decreased, the content of fine-grained cassiterite (with the granularity of minus 0.039 millimeter) is reduced by 20 percent, and over-crushing phenomena of cassiterite are greatly reduced.

Description

technical field [0001] The invention relates to a new selective grinding method of cassiterite polymetallic sulfide ore. Background technique [0002] The main types of tin deposits in my country are cassiterite-sulfide deposits, such as Gejiu and Dachang tin deposits, which are mainly distributed in Yunnan, Guangxi, Guangdong, Hunan and other provinces. The reserves of tin ore are about 3.84 million tons, ranking first in the world. Tin-containing minerals include cassiterite, yellow tin ore, phyllite, cylindrical tin ore, hydrocassiterite, stibnite, tin ore, etc., but cassiterite is the only common mineral of tin metal, other tin minerals Generally, there is no economic value. For the recovery of coarse-grained tin ore, the gravity separation method is commonly used at present. With the increase of mining years, the rich ore has gradually dried up. On the one hand, the embedded distribution of tin ore is becoming more and more complicated, which is inevitable in the reco...

AI Technical Summary

Problems solved by technology

For the recovery of coarse-grained tin ore, the gravity separation method is commonly used at present. With the increase of mining years, the rich ore has gradually dried up. On the one hand, the embedded distribution of tin ore is becoming more and more complicated, which is inevitable in the recovery of cassiterite Therefore, the recovery of other valuable components (such as sulfide ore, etc.) should be placed on an equally important position; The insurmountable contradiction of selection - the granularity is too fine

[0003] In the beneficiation process of cassiterite polymetallic sulfide ore, the sulfide minerals must first be removed by flotation, and the ore from which the sulfide minerals have been removed must be reclaimed by re-election. How to control the cassiterite in this process The problem of ore grinding particle size is that when sulfide minerals are removed by flotation, the ore grinding particle size is required to be finer, which is beneficial to the flotation of sulfide minerals, but if the ore grinding particle size is finer, the cassiterite will Crushed, which seriously deteriorates the subsequent gravity separation process, which is not conducive to the recovery of cassiterite