Sokolova V. Regularities of liberation of hematite quartzites of Kryvbas and increase of selectivity flotation them.

Dissertation is devoted the increase of efficiency of dressing of hematite quartzites of Kryvbas due to creation of rational topology of flowsheet of dressing at the leading role of flotation on the basis of regularities of liberation and increase of selectivity of division of minerals. Experimental researches are set regularities of liberation of hematite quartzites depending on their structural features, which the rational topology of flowsheet of dressing is created on the basis of: for the thinly disseminated ores with the wide spectrum of measure minerals' grain is a chart with the stage removal of products of dressing on the basis of leading role of flotation; for very thinly disseminated ores is a chart of deep dressing by flotation. On the basis of results of theoretical and experimental researches of mechanism of co-operation of flotation phases at the use of mixture of polar and non-polar reagents-collectors the increase of selectivity of flotation of hematite quartzites is set at 1,3-2,8 time, including without previous deslimming, due to flocculation of hematite fines, multiplying adsorption of reagents and adjusting of frorthing on the basis of the use of emulsion of non-polar collector in solution of polar collector. In particular, optimum ratios of collectors of the saponified tall oil and fuel oil in emulsion was determined as 2:1. The expected economic effect by introduction of the developed technology with the stage getting of concentrate on one section of KGOKOR will make about 14-37 million grn. as compared to the project chart of the magnetic-flotation dressing with reverse anionic flotation.