1. Inorganic inhibitors
Typical inorganic inhibitors are water glass, fluorosilicate, sodium fluoride, sodium fluoride, sodium sulfide, sodium six acidic phosphorus.
Waterglass used to suppress silicate mineral cassiterite flotation when it cassiterite, calcite, fluorite, barite, zircon, scheelite, galena, calcium tungsten and molybdenum ore, gypsum, boric acid inhibition of varying degrees of salt, pyrochlore, Chin iron ore, cinnabar, and sphene, etc., but different from the critical amount of inhibition. Further, the same sodium silicate inhibited copper sulfate and lead acetate activated silica, silicic acid compound mainly due to copper and lead silicate in the pulp is formed. When appropriately added metal ions in the pulp (e.g., Al 3 +, Cu 2 +, Pb 2 + , etc.), can enhance the effect of the water glass. In addition, water glass, sodium carbonate, and sodium hydroxide can be used as pH adjusters for cassiterite flotation.
Fluosilicic acid, sodium fluoride and sodium fluoride are potent inhibitors of the fluorine-containing mineral containing aluminum, often used in conjunction with styrene phosphonic acid. With an alkyl sulfate, A-22, styrene phosphonic acid cassiterite flotation, the pulp Ca 2 +, Fe 3 + and so would inhibit cassiterite. In order to reduce this inhibition, a certain amount of sodium fluorosilicate is often added.
In addition, sodium sulphide and sodium hexametaphosphate are also good inhibitors of sulphur flotation. Under basic conditions, when the flotation of cassiterite oleic acid, sodium sulfide can be suppressed in Pb 2 +, Cu 2 + activated silica, but do not inhibit cassiterite. Similarly, when sodium hexametaphosphate and oleic acid are used in combination, calcite and limonite in the gangue can be suppressed.
Second, organic inhibitors
Preferred organic inhibitors for flotation of cassiterite are sodium hydroxymethylcellulose, tributyl phosphate, naphthol sulfonic acid, high molecular weight oxalic acid, oxalic acid, straw cellulose, pyrogallol, calcium lignosulfonate (GF), citric acid, lactic acid, tannin, starch, dextrin, tartaric acid EDTA, and the like.
Hydroxymethyl fiber is a potent inhibitor of calcite. It can be used in combination with oleic acid, mixed toluene acid, and Aerosol-22. It has obvious inhibitory effects on gangue minerals such as calcite. When sodium carboxymethylcellulose is used in combination with oleic acid and the pH is 8.1, the inhibition of the calculus is the strongest. Tributyl phosphate is expensive and is often used with sodium carboxymethylcellulose. Naphthol sulfonic acid is a potent inhibitor of topaz and is often used in combination with alkyl dicarboxylic acids. Ammonia is a good inhibitor of tourmaline . Oxalic acid and sulfites are potent inhibitors of iron-containing minerals, iron, manganese and minerals commonly oxalate inhibition gangue. Straw cellulose has a strong inhibitory effect on cassiterite, calcite, quartz, etc. When hematite contains hematite and pH=3, pyrogallol has a strong inhibitory effect on hematite. For refractory cassiterite, the separation of cassiterite and hematite with A-22 and pyrogallol is effective. GF is an organic inhibitor, and has a strong inhibitory effect on gangue minerals such as calcite and quartz. The dosage is generally 100-200 g/t. In addition, GF, SR, and P86 are the best combination agents for Barry Tin fine mud.
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