Obogashchenie Rud

The section “Processing Technology” offers an interesting review of the main trends in iron ores preparation and processing equipment and technologies development in Russia and abroad (V.F. Baranov et al.). The 15 latest projects of foreign iron ore concentrating plants are assessed. Certain process solutions with regard to ore preparation, concentration, final tailings thickening, etc., are considered. The processing stage engineering performance standards of the Russian Mining Complexes located in the Northwestern Federal District and inthe Kursk Regionmagnetic anomaly area are assessed. The necessity of a comprehensive technological and engineering modernization of the industry with consideration of the world trends in designing and taking into account the implementation and experience of the complete “ore-metal” cycle at the OAO Lebedinsky Mining Complexwas shown.

One more article in this section is also devoted to iron ores processing. The authors (V.Yu. Koltsov et al.) suggest an effective method for magnesium removal from the Bakalskoye deposit sideroplesite ores. Application of solid-phase sulphatisation with subsequent roasted product leaching by water permits to obtain concentrate containing 60 % iron, removing over 85 % of magnesium from this concentrate.

The section “Beneficiation processes” considers an application of a new reagent BTF-161SK, a modification of butyl aerofloat, inthe difficultly-treated and complex Zhdanovskoye deposit cupreous ores flotation(V.I. Maksimov et al.). Reagent BTF-161SK, in contrast to butyl aerofloat, possesses good frothing properties, also in cleaning operations, providing for metals recovery and flotation process rate increase. Conditions of the reagent dosing into the process were determined.

The section “Analytical Methods” considers grinding processacoustic monitoring principles by way of examples of the laboratory and commercial jet mills operational acoustic parameters (L.Zh. Gorobets et al.). The performed acoustic study permitted to propose mill operation optimality control algorithm. The establishedregularities will form the basis of operation control system for jet grinding installations, designed to produce micron-size powders fromgranular solid materials.

The article by L.A. Vaisberg et al. in the section “Technological Mineralogy” is essentially methodical. It is noted, that an information-bearing characteristic, relating rock strength with its internal structure factors, is porosity. Pore space structure of gneissogranite, used for production of crushed stone for construction purposes, was studied by the computed tomography method (X-ray micro-CT). It was established, that rock pore space structure changes in disintegration.

The environmental themes of this issue are represented in the article by Ye.A. Alekseeva et al., dedicated to a method of mineral processing facilities’ effluents and liquid waste purification – membrane filtration. It is noted, that this method of purification increasingly becomes of current concern, and in addition to this, the problems that hinder a wider application of membrane filtration technology are described; one of them being a decrease of filtration rate due tomembrane fouling andphenomenon ofpolarization. The methods that are used inindustrial practice with a view to decrease membrane fouling are described, among them are a correct choice of membrane type. The method for membrane surface modification withtitanium dioxide is described.

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