[en] The relationship is derived for the calculation of resolution in the radiometric sorting of polymetallic ores. The results are presented of the radiometric dressing of tin ores from different deposits. A concentrate was obtained with a content of 0.9% Sn and the tin content in the waste products reduced to 0.07%. Three separation products were obtained: waste, concentrate and intermediate product. The results are presented of the radiometric sorting of sulfide, nickel and nickel-cobalt ores using radioresonance. The increased yield and quality of commercial products obtained by radiometric sorting is also demonstrated on samples of oxide manganese ore and Sn-W ore. (E.S.). 2 figs., 6 tabs

[en] X-ray radiometry method of separation during enrichment of copper-nickel and nickel-cobalt ores was tested. It is shown that both X-ray radiometric (XRR) and induction radioresonance (IRR) methods of separation are effective processes for ore preliminary enrichment. For the enrichment of high contrast ores it is expedient to use IRR separation. Low contrast ores as well as ores possessing complicated complex of physical properties should necessarily be treated using XRR separation. The method of XRR separation should envisage the operation of ore washing in case of a high quality of the given process

[en] This invention relates to the recovery of precious metals such as gold, silver, copper, and uranium by percolation or heap leaching, and in particular relates to the treatment of ores of these metals with acidic solutions to make the ores more amenable to percolation leaching

[en] The grindability of ores is generally determined by the Bond standard grindability test. However, this test is not applicable to fine matetials such as sands; the grindability of fine materials must therefore be determined by a comparative grinding method, for which a reference material of known grindability is required. Suitable reference materials are not easily obtained, and a grindability test that does not depend on reference materials is needed. This report proposes such a test and records the results of some tests on the validity of the proposed method. The proposed grindability test uses the Bond standard test mill and a quantity called the 'equivalent energy per minute', which is the energy per minute that would be used by the mill if it were scaled up to a wet-grinding industrial mill of 2,44m (8 ft) diameter. The value of this quantity, denoted by E, was calculated from the results of Bond standard grindability test on various materials, and an average value of 1425X10-⁶kW.h/min was determined. It is suggested that values far removed from this figure indicate that the ores concerned do not conform to the Bond Law of Comminution. The proposed grindability test was applied to seven samples of ore from industrial secondary grinding mills and to one sample of sand, and good agreement was found between the energy consumption calculated in the laboratory tests and those reported for the operating plants. The energy consumption calculated from the results of the Bond standard grindability test agreed fairly well with the plant data for the secondary grinding circuits, but the correlation for the primary grinding circuit was erratic

[en] To establish effluent limitation guidelines and standards of performance, the ore mining and dressing industry was divided into 41 separate categories and subcategories for which separate limitations were recommended. This report deals with the entire metal-ore mining and dressing industry and examines the industry by ten major categories: iron ore; copper ore; lead and zinc ores; gold ore; silver ore; bauxite ore; ferroalloy-metal ores; mercury ores; uranium, radium and vanadium ores; and metal ores, not elsewhere classified ((ores of antimony, beryllium, pltinum, rare earths, tin, titanium, and zirconium). The subcategorization of the ore categories is based primarily upon ore mineralogy and processing or extraction methods employed; however, other factors (such as size, climate or location, and method of mining) are used in some instances. With the best available technology economically achievable, facilities in 21 of the 41 subcategories can be operated with no discharge of process wastewater to navigable waters. No discharge of process wastewater is also achievable as a new source performance standard for facilities in 21 of the 41 subcategories

[en] A text providing a sedimentological treatment of a study on ore deposits, and especially as related to geochemistry. Excellently documented (about 5000 citations). Well indexed with the index of deposits and localities separated. Contents, Iron. Copper and silver. Aluminum and nickel. Manganese. Uranium. Lead and zinc. Volcanic-sedimentary ores. Appendix. Indexes

[en] Classification of mineral deposits by hydrogeological and geologo-engineering conditions is suggested; division of these conditions into 3 types such as: confinement to the structures of the first order; classes reflecting belonging of deposits to definite geological formations and geologo-engineering conditions; groups with primary development of hypergenesis and metamorphism, intensity and dynamics of geological and geologo-engineering processes, laws of ground-water recharge, serves as the basis for the classification. Classification of W, Au, Ni, Cu, Fe, Hg, U and other deposits by types, classes and groups, methods and technical devices for mining conservation from ground water and draining technique are presented in a table

[en] Requirements for the technology of the processing of ores including uranium ores and principal stages of the working out of technological schemes are described in brief. There are reference data on commercial minerals and ores including uranium-thorium ores, their classification with due regard for physical, chemical and superficial properties which form the basis for ore-concentrating processes. There are also presented the classification of minerals including uranium minerals by their flotation ability, flotation regimes of minerals, structural-textural characteristics of ores, genetic types of ore formations and their concentrating ability, algorithmization of the apriori evaluation of the concentration and technological diagnostics of the processing of ores. The classification of ore concentration technique is suggested

[en] Reagents-collectors and frothers, used abroad in reagent regimes of flotation of copper, copper-molybdenum and copper zinc ores, have been considered. Xanthogenates, aerofloats, xanthogenformiates, thionocarbamates are mainly used as reagents-collectors. Methylizobutylcarbinol and Daufros are used as reagents-frothers

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