Current situation and comprehensive utilization of iron ore tailing resources

The situations, characteristics, and status of iron ore tailing resources in China are presented. The approaches of comprehensive utilization of iron ore tailings have been analyzed. It has been proved that the comprehensive utilization of iron ore tailings is efficient, socially beneficial and improves environment situation. The scopes of comprehensive utilization of iron ore tailings are reported. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 105–110, July–August, 2006.     

Modeling of Area-End Ore Drawing under Caved Rocks

The results of modeling the technology of area-end ore drawing under caved rocks are adduced. The advantages of the new method over the end ore drawing are shown. A method of calculating losses and impoverishment depending on sublevel and breaking parameters as well as on ore drawing mode is presented. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 5, pp. 50–61, September–October, 2005.     

Electrical blasting disintegration of copper-nickel ores conjointly with separation of particles by size

Absract The effect of electrical blast parameters is studied for grinding mineral materials by example of copper-nickel ore. It is shown that the average energy consumed by the electrical blasting is within 5–50 J/g. The particle disintegration mechanism has been considered at high and low electric conductivity of ore. It is established that grinding and separation of particles by size are possible to be performed conjointly in the same apparatus. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 100–107, January–February, 2007.     

Principles of projecting mining-and-engineering systems for integrated mineral mining with a combined geotechnology

The authors describe a new scientific-technical approach to projecting the integrated development of ore deposits with combining physico-technical and physicochemical geotechnologies. The paper generalizes the theoretical backbone of integrated subsoil development, presents the modern concept and principles of projecting the combined physico-technical and physicochemical geotechnology, and shows mining-and-engineering systems for integrated ore extraction with an expanded geotechnological cycle. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 58–66, November–December, 2008.     

Use of fluorinated alcohols to intensify copper-nickel ore grinding

The experimental data are reported on intensification of the copper-nickel grinding by feeding fluorinated saturated mono-atomic alcohols of a general formula H - (CF₂CF₂) _n - CH₂ - OH into a mill. The feeding of this reagent into a mill at the rate of 25–100 g/t of feed provides better exposure of aggregates in the ore preparation circuit thus intensifying the subsequent ore flotation. The increment of copper and nickel recovery into a concentrate amounts to more than 4%. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 95–100, July–August, 2008.     

Geomechanical conditions of kimberlite extraction in terms of internatsionalnaya kimberlite pipe

The paper analyzes geomechanical conditions of slicing method application to extract a vertical ore body in terms of Internatsionalnaya kimberlite pipe. The authors assess stability of stopes at principal stages of horizon mining. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 46–55, March–April, 2009.     

Raman scattering in diamond and associated minerals of diamond-bearing ore

Conclusion In this work we have found that out of the 40 ingredients of the diamond-bearing ore, not more than five samples luminesce. The ore contains less than 1% luminescing samples whose intensity is close to the intensity of Raman scattering in diamonds. The obtained data as well as the relatively low level of the luminescence background and a very narrow Raman scattering peak suggest that the Raman scattering method is highly promising for extraction of diamonds and other minerals from the ore. Institute of Design and Technology of Scientific Instruments, Siberian Branch, Russian Academy of Sciences, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, Vol. 33, No. 5, pp. 126–130, September–October, 1997.     

Mineral hardness effect on the combined mineral grinding

The effect of rock-forming minerals on grindability and amorphization of sulfide minerals: pyrrhotite, chalcopyrite, and pentlandite is considered on quartz as an example. It is established that quartz appreciably retards the grinding of sulfide minerals of −0.5 + 0.2 mm in ore size, and above all, the time of grinding down to −0.05 mm in the product size increases 1.5–2 times. The separate milling of minerals, essentially differing in hardness (1.5–2 times), is recommended to optimize the grinding process and to cut down the power consumption. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 121–126, July–August, 2007.     

Concept of a rock-breaking working element of an underground kimberlite ore mining machine

The paper presents a review of the roadheaders’ working element designs suitable to be equipped with shearing disks capable of kimberlite ore disintegration with admissible energy consumption and considerably reduced wear of a working element. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 98–105, November–December, 2006.     

Scientific grounds for high-performance agent modes in platiniferous sulfide mineral flotation from rebellious ores

The author substantiates the choice of new selective agents PTTC, HPEDETC, and Hostaflot M-91 to float platiniferous sulfide minerals from rebellious ores. The study agent modes imply the use of PTTC, being a component of modified xanthate and providing 6–7% increase in recovery of copper, nickel, and PGM in flotation of the low-sulfide platiniferous copper-nickel ore from the Fedorovo-Pansky deposit. The substitution of HPEDETC and Hostaflot M-91 for xanthate makes it possible to increase recovery of platinum by 5.7–13%, palladium by 4–9% and 2–4 times the noble metal content in the flotation concentrate.     

Estimate of the rock mass stress state in the course of mining the reserves subjacent the open pit bottom at the “Udachnaya” pipe

Using the mathematical modeling approach, the rock mass stress state is analyzed in the case of the open pit and underground mining of ore reserves of the “Udachnaya” pipe, the stability of the open pit walls and possible failure of the host rocks in the area of second working are estimated. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 25–35, July–August, 2007.     

Optimization of mineral mining geometry and mine production capacity

The dynamic programming of delineation variants and operating periods for a deposit is used to study the problems of estimating the varied conditions of mineral resources and optimal production capacity of a mine based on the natural characteristics of ore reserves. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No.3, pp. 50–55, May–June, 2006.     

Investigation into magnetic characteristics of neodymium-iron-barium system in dry magnetic separators

The intensity of magnetic fields and specific magnetic forces of the systems made of rare-earth constant magnets of opposite polarity and different configurations were measured. The results were used to reconstruct magnetic systems of dry magnetic separators, namely, substitution of neodymium-iron-barium for barium ferrite. The new systems installed in 55 separators at “Evrazruda” processing plants improve parameters of magnetite ore processing. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 106–111, January–February, 2009     

Classification of methods for ore mining at a large depth

The authors analyzed various criteria that are used in different classifications of mining methods and systems. It is shown that today’s complex geomechanical situation of mining at large depths and wide application of mobile machinery to mineral exploitation has brought to nothing the erstwhile practical importance of many geotechnologies. The modern trend-based classification of the underground ore mining methods is proposed. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 47–57, November–December, 2008.     

Improvement in ore beneficiation technology of complex substance composition

The results are presented for investigations on improving beneficiation process of mineral raw material of complex composition by way of example of rebellious polymetallic ore from the Zhairemsky deposit. It is found that the production of conditioned collective concentrates by accelerated electron action is accompanied by reduction in losses of lead and zinc with the tailings that are 2–3 times less than in direct selective flotation. Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 5, pp. 97–102, September–October, 1999.     

Explosion booster for blast hole fans

The author describes the construction of an explosion booster composed of a waveguide and a membrane. The booster is placed at the bottom of a blast hole and is initiated by detonation wave. Experimental underground tests of explosion boosters showed the qualitative ore blasting results, in particular, with fan-patterned blast hole drilling. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 30–35, November–December, 2008.     

Effect of the physical-chemical factors on flotation perfection of magnetite concentrates

The paper describes the laboratory studies aimed at comprehensive analysis and establishment of the optimal parameters for preparation of a pulp for reverse cation flotation when producing a low-silica iron ore concentrate. The kinetics of the process is investigated with application of a collecting agent and depressing agents for iron minerals. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 118–125, January–February, 2008.     

Social background of up-dating the underground iron-ore mining technology in Siberia

The author analyzes industrial injuries and diseases in terms of iron-ore mining enterprises in Siberia. It is shown that the harm to health is conditioned by the technology chosen for underground mining. To improve the safety of mining operations, it is recommended to select the sublevel caving method with areal-frontal ore drawing and mobile mining machinery for thick steep deposits. __________ Translated from Fiziko-Tekhnicheskie ProblemyRazrabotki Poleznykh Iskopaemykh, No. 5, pp. 98–104, September–October, 2008.     

Information modeling of a geomechanical space

An approach to information modeling of geodynamic processes in a rock mass is proposed. The mathematical methods developed for 3D modeling of geomechanical objects are based on the triangulation by the defined set of revision points obtained from layouts of levels; the information model data base design is described. The information model implementation for the conditions of the Tashtagol ore deposit is presented. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 84–98, March–April, 2007.     

Effect of the textural-structural characteristics of oxidized ferruginous quartzites on their beneficiation in a strong magnetic field

Conclusions The results of investigations have shown that the dressability of the ores depends markedly on their textural-structural characteristics. As a result of structural differences, the optimal preparation conditions of the ores are inappropriate; this is the basis for recommending separate reprocessing of ores with markedly different material compositions. The mineral composition of the ores has a no less marked effect on the dressability. Thus ores processed with residual magnetite, which promotes fuller extraction of the ore minerals from the tailings, gives poorer concentrates under the same magnetic separation conditions, owing to capture of a large number of concretions of the ore minerals with quartz. Better performances are obtained for coarse-grained medium-laminar quartzites of the VI iron horizon, poorer performances by laminar, fine-grained quartzites of the V iron horizon, which contain an intense impregnation of fine-grained quartz in the ore aggregates and grains. Mekhanobrchermet, Krivoi Rog. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 98–103, July–August, 1972.