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.
