Study On High Concentration And Electrochemical Flotation Of Lead-antimony-zinc Sulfide Ore

Abstract:According to characteristic of the multi-metal sulfide ore bearing cassiterite from Dachang, the floatability differences among the mineral ores contained and the problems existed in the previous production technology, a new high concentration open flotation technology was studied and pulp potential control was introduced as a regulation parameter to solve the separation problem among jamesonite, marmatite and pyrite, as well as the zinc and sulfur. Before, studies on the potential control flotation technology of multi-metal sulfide ore bearing cassiterite are relatively less at home and abroad.The paper studied the flotation behavior of jamesonite and marmatite under butyl xanthate and diethyl dithiocarbamate systems, and the effect of pulp potential on sulfide ore flotation. Studies have shown that jamesonite has high floatability at pH less than10with butyl xanthate or diethyl dithiocarbamate as collector, but flotability began to decline sharply at pH greater than10. However, Marmatite is of high floatability in acidic pulp(pH less than5), but as the pH increases, the floatability began to decline sharply. Floatable potential range(Eh(1)<Eh<Eh(u)) under acidic conditions is wider than under alkaline conditions of jamesonite and marmatite,and marmatite is no floating anyway adjusting pulp potential under alkaline conditions.Eventually, under certain pH value, pulp potential and reagent system, effective separation between jamesonite and marmatite was achieved.Zeta potential, infrared spectroscopy, cyclic voltammetry and tafel curve experiments were conducted to study the interaction mechanism between jamesonite and butyl xanthate, jamesonite and diethyl dithiocarbamate, marmatite and butyl xanthate, and marmatite and diethyl dithiocarbamate. Results show that both butyl xanthate and diethyl dithiocarbamate can chemically absorbed on the surface of jamesonite and marmatite and generate corresponding collector-metal salt. Due to the relatively strong selective of jamesonite, diethyl dithiocarbamate can be used as the flotation separation collector of jamesonite and marmatite. 92#ore body in Dachang was studied with the high concentrations and potential regulatory flotation technology, and effective separation of jamesonite and marmatite was achieved. Finally, lead concentrate with the grade and recovery of Pb is24.82%and80.26%respectively,20.91%and81.08%of Sb respectively and zinc concentrate with zinc grade of46.75%and zinc recovery of89.07%were obtained.