几种硫酸盐矿物可浮性的晶体化学研究

Study on Crystal Chemistry of Floatability of Several Sulfate Minerals

在油酸钠和水杨羟肟酸浮选体系中3种矿物的可浮性大小为重晶石>天青石>石膏;在十二胺浮选体系中为石膏>天青石>重晶石。利用XPS和红外光谱测试探讨了捕收剂与矿物的作用机理。油酸钠与3种硫酸盐矿物之间的作用是化学吸附,十二胺为物理吸附,水杨羟肟酸则是与矿物发生螯合反应。对矿物晶体结构中的化学键进行了理论计算,发现3种硫酸盐矿物晶体结构中Mn+-O2-键断裂程度与矿物可浮性密切相关。

The floatability of three minerals is in the sequence of barite〉celestite〉 gypsum in sodium oleate and salicylhydroxamic acid system and of gypsum〉celestite〉 barite in lauryl amine system.XPS and infrared spectrum analysis were used in studying the functional mechanism between collectors and minerals.The function between sodium oleate and the three sulfate minerals is found to be chemical adsorption;that of lauryl amine,physical adsorption;and that of salicylhydroxamic acid,chelating reaction.The theoretic calculation for the chemical bonds of mineral crystal structure indicate that the M^n＋-O^2- breakage degree in the crystal structure of these three minerals is closely related to mineral floatability.