Fluorite ore flotation process

Quartz-type fluorite ore flotation process

Quartz-type fluorite ore is mainly composed of fluorite (content 80% to 90%) and quartz, accompanied by a small amount of calcite and barite. Minerals such as stone, pyrite and kaolin.

For this type of fluorite ore flotation, fatty acids are often used as collectors, sodium carbonate is used as the slurry pH adjuster (pH value is 8 to 9), and water glass is used as an inhibitor. High-quality fluorspar concentrate can be obtained by sub-selection. For fine-grained embedded fluorspar ore, it is necessary to improve the grinding operation and strengthen the degree of monomer dissociation.

Calcite-type fluorite ore flotation process

Calcite-type fluorite ore is mainly fluorite, and the associated ore is calcite (content 30 % or more) and small amounts of quartz, sometimes in the form of quartz-calcite-fluorite minerals.

Since both fluorite and calcite are calcium-containing salt minerals, their solubility is similar. When using fatty acids for collection, both have strong adsorption properties. Therefore, calcium-containing minerals are mostly used. Inhibitors (such as water glass, sodium metaphosphate, lignosulfonate, dextrin, tannic acid, oxalic acid), oleic acid as a collector, sodium carbonate as a pH adjuster (pH value is 8~9.5), first Mixed flotation is carried out, and then fluorite and calcite are separated and flotated. In order to improve the inhibition effect, the flotation slurry is often added in the form of a combination of chemicals.

Barite-type fluorite ore flotation process

The barite-type fluorite ore is treated with barite (content 10% ~40%) and fluorite ore, with a small amount of associated minerals such as pyrite, galena, sphalerite, etc. Some deposits contain a large amount of quartz, which will exist in the form of barite-fluorite-quartz ore.

This type of ore flotation generally uses oleic acid as the collector and water glass as the inhibitor. The multiple flotation process first carries out the mixed concentrate of barite and fluorite, and then carries out fluorite and recrystallization. Stone separation and selection.

There are two methods for separating and sorting fluorite and barite. One is to suppress the flotation of barite into fluorite, and the other is to suppress the flotation of fluorite into barite.

Suppression of barite flotation fluorspar process

After obtaining barite and fluorite mixed concentrate , using aluminum sulfate, water glass and tannins as combined inhibitors of barite, through a rough selection and multiple flotation processes to separate fluorite and barite. The barite concentrate obtained by this method has a high grade, but the fluorspar grade is relatively low.

Suppression of fluorite flotation barite process

After obtaining the mixed concentrate of barite and fluorite, activate the barite, sodium hydroxide and sodium silicate with barium chloride To suppress fluorite, priority is given to flotation of barite, and then oleic acid is used as a collector, sodium silicate and aluminum sulfate are used as inhibitors, and fluorite is flotated from the tailings. The fluorite ore concentrate obtained by this process has a high grade, but the barite grade is relatively low.

Flotation of polymetallic paragenetic fluorite ore

Mineral group of polymetallic paragenetic fluorite ore Most of the minerals are quartz and fluorite, accompanied by more heavy metal minerals, including galena, sphalerite, chalcopyrite, pyrite, scheelite, etc.

This type of fluorspar ore generally uses the priority flotation method to select useful minerals in sequence, and uses sulfide mineral collectors (xanthate, black medicine, etc.) to float out the metal sulfide minerals first, and then use fatty acid collectors (oleic acid, oxidized paraffin soap, etc.) to flotate fluorite ore from the metal sulfide ore tailings.