Mineral processing technology combined with high-gradient high-intensity magnetic separation, re-grinding, re-separation and flotation

Abstract

The invention provides a mineral processing technology combined with high-gradient high-intensity magnetic separation, re-grinding, re-separation and flotation, wherein after crude brass, galena, blende and pyrite are crushed and grinded as raw materials, the brass and the galena are mixed for the routine flotation for enrichment of brass and galena; after rough concentrate is re-grinded, the flotation of a concentrate is performed, in order that the quality of the mixed brass and galena is improved; next, the high-gradient high-intensity magnetic separation is carried out to separate the brass from the galena, so that the qualified brass concentrate is obtained; tailings are re-separated in order that the galena, the brass and other impurities are separated; in this way, a galena concentrate is obtained; ores which are being re-separated return to a technology for re-grinding the rough concentrate of the brass and the galena to enter a circulation system; the post-mixed tailings of the brass and the galena undergo the router flotation of the blende and the pyrite, so that a qualified blende concentrate and a qualified pyrite concentrate are obtained; and as such, separation of the brass, the galena, the blende and the pyrite which are complicated and are difficultly separated is realized. The technology has the advantage that the defects that the brass and the galena are low in quality and are mixed with each other during the separation of the brass and the galena are prevented.

Description

technical field [0001] The invention relates to the technical field of mineral processing technology, in particular to a combined mineral processing technology for separating chalcopyrite and galena by using high-gradient strong magnetic separation, regrinding, gravity separation and flotation. A method for separating brass, galena, zinc sphaler and pyrite from sphalerite and pyrite. Background technique [0002] Copper is a non-ferrous metal closely related to human beings. It is widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields. It is second only to aluminum in the consumption of non-ferrous metal materials in my country. Lead is widely used in various industries, and it is used in large quantities to make storage batteries; lead plates and lead pipes are used as lining protection equipment in the acid industry and metallurgical industry; cable sheaths and fuses are used in the electrical i...

AI Technical Summary

Problems solved by technology

By looking up the specific magnetic susceptibility table (determining whether the mineral is magnetic or not), analyze the difference in specific magnetic susceptibility of brass, galvanized zinc sphaler, and pyrite. There is no magnetism, and the difference is very big. Magnetic separation can separate brass and galvanized. The specific gravity of brass is 4.2g / cm3, and the specific gravity of galvanized lead is 7.5g / cm3. Many tests have been carried out, because the current field strength of high gradient magnetic separation in the market can only reach 1.3T, and the single magnetic separation and gravity separation indicators are not ideal, so it needs to grind again, and then use magnetic separation and gravity separation after flotation and separation The joint application has achieved very good indicators, thus inventing a combined beneficiation process of high gradient strong magnetic separation, regrinding and re-election, and flotation, from complex and difficult-to-separate brass, galena, sphalerite, and pyrite Method for separating brass, galvanized zinc, spangler and yellow iron

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