Fluorite flotation medium adjusting agent is sodium carbonate pH 7.5 ~ 8.6, a collector fatty acids (soaps), sodium silicate modifier auxiliary weight chromium, potassium, the use of demineralized water.
Fluorite (CaF 2 ) has a fluorine content of 48.9%, a density of 3.1g/cm 3 and a hardness of 4. The fluorite is widely used in chemical, smelting and ceramic industries. The lump ore can be hand-selected and re-selected.
The fluorite used in the chemical industry requires high grade. It must be floated, floated with fatty acid collector, soft water at 60 ° C, pH 8 to 9.5, selected 3 to 4 times, sodium carbonate and caustic soda for pH adjuster. , gangue inhibitor water glass, starch, dextrin, collector oleic acid, refined tar oil and the like.
Fluorite ore flotation siliceous gangue easier containing gangue carbonate is more difficult to suppress calcite commonly tannins, baking gum, dichromate, and water soluble aluminum salts may be glass and improve calcite Selective inhibition. Flotation of barite- containing fluorite ore is also difficult, and starch, lignosulfonate, and sodium cyanide are commonly used to inhibit barite. When the barite is high, the barite is removed by re-election or flotation and the fluorite is floated. The petroleum sulfonate is used as a collector, the water glass and the cerium chloride are used as a pulp adjusting agent, the barite is floated, and the fluorite is floated from the flotation tailings with oleic acid.
Quality requirements for fluorite use
General industrial requirements for fluorite for steelmaking flux:
The industrial grade of calcium fluoride (rich ore) ≥ 60%, silica ≤ 20%, sulfur ≤ 1.5%, SiO 2 , S reduce the flux efficiency, increase the amount of slag, consume fuel, S enters the steel, and harms the quality of the steel. Calcium fluoride industrial grade (lean ore) ≥ 20% ~ 30%, no impurities required cheap, mining, after washing, crushing, grading, grading, steel mills directly use.
Chemical fluorite (manufacturing of artificial cryolite, hydrofluoric acid and its salts) quality requirements:
CaF 2 >93% to 98%; SiO 2 <0.8% to 1.5%; CaCO 3 <1% to 1.5%; S, Pb, Zn, BaSO 4 and the like are harmful impurities.
Glass fluorite CaF 2 >80%; Fe 2 O 3 <0.2%.
Ceramic fluorite CaF 2 >95% to 96%; SiO 2 <2.5% to 3%; CaCO 3 <1%
Fe 2 O 3 <0.12%. Pb, Zn, S and barite are harmful impurities.
The diabase cast stone has a fluorite CaF 2 >85%.
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