论文部分内容阅读
在敞开大气的体系中 ,用吸附量测定、动电位测定和微量浮选试验方法研究了糊精对黄铁矿浮选的抑制作用。糊精在黄铁矿上的吸附是通过与矿物表面氧化形成的三价铁的氢氧化物之间的特效反应而发生的。糊精的等电点为 pH 4,而黄铁矿等电点为 6 4。当矿浆 pH在 4～ 6 4之间时 ,静电作用促使糊精在黄铁矿表面上吸附。糊精和黄药在黄铁矿表面上发生共吸附 ,由于黄铁矿表面具有不均匀性 ,因此糊精对黄铁矿抑制具有特殊的机理 ,即糊精对黄铁矿的抑制可能是由于糊精遮盖了矿物表面上由黄药离子吸附所产生的双黄药。试验结果表明 ,糊精对黄铁矿的抑制作用像氰化物一样有效
In open-air system, the adsorption of dextrins on flotation of pyrite was studied by adsorption, potentiodynamic and trace flotation. Adsorption of dextrin on pyrite occurs through a specific reaction between the hydroxide of the ferric formed by oxidation of the mineral surface. The isoelectric point of dextrin is pH 4, while the pI of pyrite is 6 4. When the pH of the slurry is between 4 and 64, the electrostatic interaction promotes the adsorption of dextrin on the surface of the pyrite. Dextrin and xanthate co-adsorption on the pyrite surface, due to the uneven surface of pyrite, dextrin pyrite inhibition has a special mechanism that dextrin pyrite inhibition may be due to Dextrin covers the xanthones produced by xanthate ion adsorption on mineral surfaces. The experimental results show that the inhibitory effect of dextrin on pyrite is as effective as cyanide