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Based on the mineralogical research package, the authors state adequacy of compositions of modified kimberlites and mineral processing slurry. Investigation results show high content of clayey minerals such as talcum, talcum-saponite, chlorite-saponite, Na-saponite and X-ray amorphous phase up to 50 %. Calcite, dolomite and serpentine are present. Using optical microscopy, infrared spectroscopy and X-ray microspectral analysis, the surface composition of natural diamonds is studied when they interact with the traced minerals. The authors have found the sequence and conditions for mineral formations on diamond surface during processing of metasomatically modified kimberlites.

In focus are issues of metallurgical slag disintegration by centrifugal-impact crushers. The article shows the model of breaking a piece of material in the centrifugal-impact crusher chamber. The scheme of force interaction between slag particles and crusher chamber is developed considering spread inertia load. It is found how structural parameters of crushing machines are connected with the process properties of slag, and the velocity and physico-mechanical properties of a piece of slag are related. The authors give technological recommendations on adapting centrifugal-impact crushing to mining waste pretreatment flowcharts.

The analysis of floatability of scheelite with FX-6 agent (produced in People’s Republic of China) shows that, as against sodium oleate, FX-6 consumption is to be increased in the bulk flotation circuit by 25 % in order to have a comparable output. Given more stringent conditions in terms of depressor for retreating of rougher concentrates, the increased consumption of FX-6 enables obtaining the final concentrate with 60.4 % recovery of WO ₃ where the increment by 0.63 % is thanks to essential reduction in sheelite loss in slurry. Based on the laboratory testing results, FX-6 agent is recommended for commercial trial.

The numerical exercise of two subprocesses-attachment and detachment of air bubble and mineral particle-illustrates feasibility of 2-3 times improvement of concentrate quality in separate flotation of sand and fine material as compared to the standard processing. This effect is achieved owing to optimization of ratio of bubble diameter and dissipation energy for each out of 36 fractions of particles differing in size and content of copper. The relationship of hydrodynamic factors depends on the size of the particles and on the distribution of metal in them.

The lab tests have been carried out to examine the influence of different factors on selectivity of chalcopyrite flotation from copper sulfides with moderate content of pyrite. The authors use the factorial design of the experiments. It is studied how the grinding fineness and xanthate concentration influence flotation of chalcopyrite and pyrite at different lime-adjusted pH values of the pulp. It is found that the highest influence on copper recovery is exerted by the size of the ground ore, pH value and collector consumption. In view of the high activity of pyrite and the intergrowth of chalcopyrite and pyrite with barren rock, it is required to grind ore up to 75-80 % content of size -74 µm, while pH of the pulp is to be maintained at the level of 11 in all flotation circuits.

Based on the analysis of etymological hierarchy of subsystems inside a complicated system, the authors substantiate and put forward definition of a subsoil development method structured based on the degree of complexity of the development. It is hypothesized on information analogy between patterns of substance flows in biological and geotechnological systems, and the procedure has been offered for quantification of integrated subsoil development in terms of correlating the substance of lithosphere that enters a technological level and that passes to the next one, based on homeostatic transformation of mechanisms of biological substance flow where informative elements are replaced for technological target analogues.

In accordance to the agreed terminology, it is concluded that mineral mining and processing industry cannot be environmentally clean. For these industry branches, it is assumed sufficient to transfer to ecologically justified technology and production featuring minimized environmental impact. The article offers formulation of basic conditions and innovation principles for integrated development of mineral mining and processing. In terms of Transbaikalia, the author introduces the notion of “regional power engineering” ensuring faster growth of individual mining regions and handling of their social and economic issues.

The probable structure of the isobutyl alcohol molecule (СН₃)₂СНСН₂ОН is calculated in four most stable conformations. The basic principles of obtaining an adaptive structure of the molecule are presented. The sets of interatomic distances, bond angles and calculated rotational constants are given for each of the conformations.

Within a slab model the systems of oxygen-containing compounds are investigated. The geometry and the electronic structure are determined for Na₂O₂/NaClO₄(001), K₂O/KClO₃(001) systems using the CRYSTAL09 program package. Parameters of the atomic structure, bond populations, atomic charges, energy distributions, and interaction energies are calculated. It is found that when an oxide and peroxide nanolayer is adsorbed, the bond significantly weakens in chlorate and perchlorate anions.