无机沉淀物气浮表观活化能影响因素的研究

Studies on Effective Factors of the Flotation Apparent Activation Energy for inorganic Precipitates

选取Ｎｉ２＋，Ｐｈ２＋，Ｚｎ２＋，Ｂｉ３＋，Ｃｒ３＋，Ｆｅ３＋，Ｃｅ４＋等重金属离子生成氢氧化物、硫化物及磷酸盐沉淀作试验．研究了沉淀物的种类和形态、沉淀物与气浮剂的吸附形态、不同的气浮剂及气浮方式等对气浮表现活化能的影响．

The hydroxides, sulphides and phosphates precipitates of Ni2+, Zn3+, Ph2+,Fe3+, Bi3+, Cr3+, Ce4+ are nced to investigate the effective factors of the apparent flotation activation energy (Ef). The main physical and chemical factors include: the type and form of the precipitates, the adsorbed form of the foaming agent on the precipitates,various foaming agent and the mode of flotation. The results indicate that the Ff of noncrystal line precipitates is lower than that of the crystal line the Ef of the hydroxides is lower than that of sulphides; for the chemical adsorption of foaming agent on the precipitate, the Ef is low; the Ef of LC-I for foaming agent is the lowest among three foaming agents (sodium lauryl surifate, sodium oleate and LC-I agent) and Ef of the cycloneaeration flotation is the lowest among three modes of flotation (conventional dissolved flotation, air diffusion flotation, cyclone-aeration flotation ) are used. Various inorganic precipitate flotation kinetic studies showed that the flotation of abovenentioned precipitates could be described by an first-order reaction equation.