高硅型异极矿硫化—胺类捕收剂浮选机理研究

采用浮选溶液化学理论结合第一性原理研究了高硅型异极矿硫化—胺类捕收剂浮选作用机理.研究表明,长链胺分子对异极矿回收率高于短链胺分子,直链胺分子的捕收能力优于同分子量的支链结构;矿浆pH值为11有利于异极矿与石英的分离,十八伯胺的适宜用量为1.25×10-4 mol/L;硫化钠可以显著提高异极矿回收率.溶液化学分析显示H...

Study on Sulfide-amine Flotation Mechanism of Hemimorphite with High Content of Silicon

Sulfide-amine flotation mechanism of hemimorphite with high content of silicon was studied by solution chemistry theory and first principle calculation. Results show that the flotation recovery of hemimorphite by using long carbon chain amine is higher than that with short carbon chain amine, and the straight-chain amine is better than that of branched one. Satisfactory separation can be obtained when pulp pH is around 11, and the optimal dosage of octadecylamine is about 1.25×10-4 mol/L. Sodium sulfide can significantly increase the recovery of hemimorphite. Solution chemical analysis shows that the HS- is the active ingredient of hemimorphite surface activation, and the recovery of hemimorphite can reach greater than 85% when the concentration of HS- is from 1.950×10-3 mol/L to 6.180×10-3 mol/L. First principle calculation shows that HS- can weakly bond with the Zn and O₁ atoms at hemimorphite surface, and the adsorption of octadecylamine at hemimorphite surface is weaker than that of HS- ions.