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以水杨羟肟酸为捕收剂,通过浮选试验、溶液化学计算、动电位和红外光谱检测分析研究了氟碳铈矿的可浮性及药剂与矿物的作用机制。当水杨羟肟酸浓度为5×10-4mol·L-1时,氟碳铈矿在pH=7~10较宽的范围内有较好的可浮性,与矿物表面的稀土阳离子的水解产物种类及其浓度有关。pH=8~9范围内,稀土阳离子水解优势组分RE(OH)2+和RE(OH)+2吸附在氟碳铈矿表面是主要的正活性质点,有利于药剂的化学吸附。在pH=8.3时,水杨羟肟酸对氟碳铈矿捕收是化学吸附作用生成五元环螯合物的结果。
Using salicyclic hydroxamic acid as collector, the flotation of bastnaesite and the mechanism of action of agent and mineral were studied by means of flotation test, solution chemical calculation, potentiodynamic and infrared spectroscopy. When the salicyclic hydroxamic acid concentration is 5 × 10-4mol·L-1, the bastnaesite has good floatability in the pH range of 7-10, which is in good agreement with the species of hydrolyzate of the rare earth cation on the mineral surface And its concentration. The adsorption of RE (OH) 2+ and RE (OH) 2+ on the surface of bastnaesite is the main positive active site in the range of pH = 8 ~ 9, which is beneficial to the chemical adsorption of the agent. At pH = 8.3, the salicylaminic acid catalysis of bastnaesite is a result of chemical adsorption of five-membered ring chelates.