Study and development of the process scheme of barytic raw material leaching

Abstract

Continuous growth of demand for crude ore leads to accelerated development of high-grade deposits and to putting into operation the impoverished deposits. Consequently specific yield of industrial waste for the unit of products at all the stages of productionincreases.Developmentofleachingschemesofbarium-containing waste is the purpose of the given article. There search object is barium-containing waste produced at flotation enrichment of barium-polymetal ores. The experiments on water leaching of barium-containing waste in the presence of ammonium fluoride were carried out by means of the design of experiments. In order to research leaching of barium-containing waste, three factors were chosen, namely, leaching temperature (T), leaching time (τ) and percentage of the initial solution on ammonium fluoride (С). The mathematical model of the process was developed and optimal conditions were determined for leaching barium-containing waste that provided production of desilicated concentrate of compound, mass %: SiO2 — 1.9; BaSO4 — 67.3; Fe — 8.4; Zn — 1.09; Pb — 0.91; Cu — 0.36. Under laboratory conditions, the scheme of barium-containing waste leaching was developed. Studies of barium-containing waste leaching allowed detecting partial dependence of silicon extraction into the solution on the temperature, time of leaching and concentration of solution. On the basis of significant partial dependencies, the mathematical model of the process was developed by means of which the optimum conditions for leaching were determined. Two products were produced, namely, the ammonium hexafluorosilicate solution and the chemically enriched desilicated barite concentrate.