SYNERGISTIC EFFECT OF A COMBINATION OF COLLECTORS IN ADSORPTION AT GAS-LIQUID INTERFACE

The promising nature of flotation with a combination of collecting agents is well known. The synergetic effect of combinations of collectors develops as hydrophobization of a mineral surface during adsorption and as reduction in surface tension at gas-liquid interface. The earlier proved mechanism of physisorption of an agent is based on the connection of its surface characteristics (surface pressure, spreading rate) and their collectability. It is assumed that the ratio of agents in their combination for flotation can be selected from the maximum synergistic effect achieved. This study focuses on adsorption at the gas-liquid interface in aqueous solutions of binary mixtures of sodium lauroyl sarcosinate and hexadecyltrimethylammonium bromide. The interaction parameters and the ratio of the components in the solution so that the maximum synergistic effect is achieved are determined.

Experimental Research on Lead-Zinc Separation of Refractory Lead-Zinc Ore

A complex lead-zinc sulfide ore from Inner Mongolia Autonomous Region, China, was subjected to this work. Research on mineral processing was conducted according to the properties of the lead-zinc ore. The lead minerals are successfully separated from the zinc minerals with the combination of collectors. Compared to CuSO4, new reagent X-43 as zinc activator shows its advantage in marmatite flotation. With the process utilized in this work, a lead concentrate of 59.67% Pb with a recovery of 78.69% and a zinc concentrate of 50.99% Zn with a recovery of 81.98% are produced. The silver recovery in the lead concentrate is 56.76% while the indium recovery in the zinc concentrate is 42.60%.