G. R. Bochkarev

Justification and development of innovative technologies for integrated processing of complex ore and mine waste

The article presents the theoretical and experimental research findings aimed to create a basis for the development of innovative integrated processing technologies for complex ore and mine waste. It is found that introduction of nonmechanical energy treatment by an accelerated electron beam in the ore dressing circuits increases rebellious mineral processing data. The features of a flotation unit process are analyzed from the viewpoint of improvement of collecting and selecting abilities of a reagent and relationship between these abilities and molecular structure of the reagent. The authors define flotation activity of reagents and offer a flotation contact formation criterion. It is proved to be effective and promising to use magnesium- and manganese-bearing minerals for sorption purification of mine effluents in order to reduce metal loss in the wastewater discharge and to minimize damage of natural water bodies.

Radiation Thermal Stresses in Minerals and Their Role in Magnetite Quartzite Beneficiation

The results are presented for investigations into dynamics of thermal stresses arising in minerals under the action of accelerated electrons and determining the technological indices of grinding and beneficiation. Using magnetite quartzites as an example, it is shown that due to change in strength properties of minerals during radiation treatment the relative grinding coefficient of ore increases by a factor of 1.4–1.8, while the content of iron in concentrate and beneficiation efficiency raise by 0.6–1.3% and 0.9–3.0%, respectively, with simultaneous reduction in iron losses in the tailings by 0.4–1.3%.

Sorption properties of manganese ores

Sorption properties of manganese ores to arsenic compounds in aqueous media are examined on the ore samples extracted from three Siberian deposits. The relation between sorption activity of manganese ores and medium pH, sorbent consumption, manganese content in the ore, and a manganese ore preparation process is established. Sorption properties in combination with earlier found oxidizing properties substantially expand the scope of integrated application of manganese ores.

Intensification of Coagulation Purification of Highly Colored Waters

The possibility of intensifying the purification of highly colored waters by aluminum hydroxychloride through optimization of coagulant-fluid mixing is confirmed theoretically and experimentally. It is proved that hydrodynamic conditions influence the purification efficiency in the pH range from 7 to 7.5. The advantage of hydraulic-type disperser over mechanical mixers is demonstrated. The value of energy dissipation is substantiated as a criterion of estimating the mixing intensity.

Intensification of Complex Ore Grinding and Opening by Hydropercussive and Cavitational Actions

The perspectives of new hydropercussive-cavitational method for ore preparation are shown by the example of poorly concentratable Cu-Ni and rare-metal ores.

Copper adsorption on Porozhinskoe manganese ore

The authors have analyzed copper adsorption on manganese ore from Porozhinskoe deposit. The results allow a hypothesis on the mechanisms of adsorption kinetics: adsorption rate is limited both by diffusion processes and by chemical interaction. The analysis of adsorption isotherm and its mathematical processing show that copper exhibits strong affinity toward manganese ore surface; the Langmuir equation describes the copper adsorption equilibrium with high correlation factor. The Gibbs energy has negative value.

Influence Exerted by Wave Motion of Liquid Surface on the Behavior of Floating Spherical Particles

The results are presented for measuring the amplitude of standing capillary wave causing the flooding of floating metal balls. The equation of spherical-particle motion on the liquid surface is derived with regard for displacement of the three-phase contact perimeter. Calculated wave amplitude, at which a spherical particle separates from the gas - liquid interface, is satisfactorily consistent with the experimental data.