论文部分内容阅读
本文对选矿厂实现硫化矿物无捕收剂浮选的可行性及必要条件进行了理论分析。结果表明,在特定的条件下,无捕收剂浮选工艺不仅可回收具有天然可浮性的矿物,而且可回收不具有天然可浮性的硫化矿物。无捕收剂浮选硫化矿物的最佳pH值可以根据氧化产物的零点电的电位值或硫化物表面质子化-去质子化的pH值来确定;不同硫化矿物的初始氧化电位不同,表明无捕收剂优先浮选原则上是可行的;为了防止可溶盐离子引起硫化物的活化或相互活化,可以在磨矿和浮选过程中保持所需的矿浆电位Eh值和pH值;所需的矿浆电位Eh值的调节和维持可以通过向矿浆中鼓入不同气体、加入还原剂或氧化剂、安装矿物电化学装置等途径来实现。
In this paper, the feasibility and necessary conditions for beneficiation of sulphide mineral non-collector flotation in ore dressing plant are theoretically analyzed. The results show that, under certain conditions, the collectorless flotation process can not only recover minerals with natural floatability, but also recover sulfide minerals that do not have natural floatability. The optimum pH of the collector-free sulfide minerals can be determined from the zero point potential of the oxidation product or from the protonated-deprotonated pH of the sulfide surface. The different initial oxidation potentials of the different sulfide minerals indicate that none Precipitant preferential flotation is in principle feasible; the desired slurry potential Eh and pH can be maintained during grinding and flotation to prevent sulfide activation or mutual activation by soluble salt ions; The adjustment and maintenance of the Eh value of the pulp potential can be achieved by bubbling different gases into the slurry, adding reducing agents or oxidizing agents, installing electrochemical devices for minerals, and the like.