(1) Inorganic inhibitors Butyl Tape Production Line,Waterproof Tape Production Machine,Adhesive Coating Machine,Butyl Tape Extruder Machine Hebei Shuangda Rubber & Plastic Machinery Co., Ltd. , https://www.shuangdarubber.com
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., Al3 +, Cu2 +, Pb2 +, 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. When flotation of fine cassiterite with sodium alkyl sulfate, A-22, and styrenephosphonic acid, Ca2+, Fe3+, etc. in the slurry can inhibit the 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 alkaline conditions, when cassiterite is floated with oleic acid, sodium sulfide can inhibit quartz activated by Pb2+ and Cu2+, but does not inhibit cassiterite. Similarly, when sodium hexametaphosphate and oleic acid are used in combination, calcite and limonite in the gangue can be suppressed.
(2) 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.
Third, the effect of metal cations on the performance of the collector
(a) The impact of Fe3+
Fe3+ in the pulp has an inhibitory effect on gangue and cassiterite. With aliphatic phosphonic acid as the collector, Fe3+ has the strongest inhibitory effect on cassiterite at pH<4.5. When harvested with sodium sulfosuccinate, Aquamollin BC can counteract the effect of 10 mg/L iron at pH=3. When flocculant is floated with collector A-22, Fe3+ has little effect on A-22 flotation of cassiterite at a concentration of less than 10-4mol/L, but as the concentration increases, cassiterite will be strongly Inhibition.
(B) the impact of Ca2+
When the collector is oleic acid, a small amount of Ca2+ is added to activate the cassiterite.
(3) The impact of A13+
+ Significantly affects the flotation of cassiterite by sulfonated succinic acid acid collector. When the A13 + and A-22, arsenic acid and para-toluene dodecylamine acetate used in conjunction with, Al3 + has a certain extent of cassiterite. When A13+ is added at the same time as the para-toluene arsenic acid, and the pH is 2 to 4, Al3+ has an activation effect on the cassiterite.
(4) The influence of Pb 2+
Pb2+ has a certain activation effect on the flotation of cassiterite when using aliphatic phosphonic acid as a collector.
Further, when as collector with CF, Ca2 +, Mg2 +, Cu2 +, Zn2 +, Fe3 +, Sn4 + are disincentive for cassiterite, tantalum and niobium mineral, wherein Cu2 +, Fe3 +, Sn4 + greater impact.
Fourth, the conclusion
The difficulty in sorting fine-grained cassiterite is still a major problem in the mineral processing industry. Although the flotation method is one of the most effective methods for recovering fine-grained cassiterite, the cost of cassiterite flotation agent is high, the environmental pollution is large, and the index is low. Therefore, research and development of new pharmacy and combination agent on fine cassiterite The recycling is important.
Tinfonite flotation inhibitor