摘要
本文采用显微电泳仪、原子吸收光谱、紫外光谱吸收仪和X射线粉晶衍射仪研究了药剂与矿物表面的作用机理。证明亚硫酸氢钠和石灰组合剂作用后,在镍黄铁矿表面形成了CaSO_3和CaSO_4等亲水性产物,同时降低了矿浆体系的氧化还原电位(Eh),加快了镍黄铁矿表面氧化速度,生成了Fe(OH)_3和Ni(OH)_2等产物,强化了镍黄铁矿的抑制。
In this paper, mechanisms of the interaction of reagents with mineral surfaces have been investi-gated by means of microelectrophoresis apparatus, atomic adsorption spectrophotometer, ultra violetspectrophotometer and X-ray powder diffraction spectrometer. It is shown that the addition of com-bined reagent of sodium hydrogen sulfite and lime results in the formation of hydrophilic CaSO_3 andCaSO_4 etc. on the pentlandite, and decreases redox potential (Eh) in the pulp system, and acceleratesoxidation rate of the surface of pentlandite, therefore Fe(OH)_3 and Ni(OH)_2 are formed and thus pent-landite is deprassed strongly.
关键词
黄铜矿
镍黄铁矿
浮选
亚硫酸氢钠
flotation
reaction mechanism
chalcopyrite
pentlandite/Z-200
combined reagent
