Main trends in the theory of coal mining processes at large depths

Journal of Mining Science -     

俄罗斯诺里尔斯克选矿厂选矿新工艺的创立

由于近年来塔尔纳赫斯克选矿厂的生产能力已达到能够处理塔尔纳赫斯克矿山开采的全部富的致密块状硫化矿石。所以，诺尔斯克选矿厂多余的生产能力可以用来分别处理过去同时开采的浸染状矿石和铜矿石，以及处理过去堆存的磁黄铁矿精矿，处理浸染状矿石除采用常规的浮选工艺外还采用闪速浮选和从浮选尾矿中重选回收贵金属；在铜矿石处理中采用正优先浮选流程；在处理堆存的磁黄铁矿精矿时采用贵金属重选预选和给矿磨矿擦洗。     

Stability of xanthates in sulfite media

Journal of Mining Science -     

Interaction of Bacillus polymyxa with some oxide minerals with reference to mineral beneficiation and environmental control

Interaction of Bacillus polymyxa with calcite, hematite, corundum and quartz resulted in significant surface chemical changes not only of the cells but also in the minerals. Both the cell surfaces as well as quartz particles were rendered more hydrophobic after mutual interaction, whilst the rest of the minerals exhibited enhanced hydrophilicity after interaction with the bacteria. The bacteria were also observed to be capable of dissolving calcite, hematite and corundum and biosorbing the dissolved metal ions to varying extents. An excess of polysaccharides could be observed on biotreated calcite, hematite and corundum while the predominance of a protein-based metabolic product was evident on quartz surfaces. The utility of bioprocessing in the beneficiation of the above minerals through bioflotation and bioflocculation is demonstrated.     

Experience and perspectives of application of gasdynamic coatings in space technology

The given work deals with the results of the research carried out by the “Salute“ DB of the Khrunichev State research-and-production space center concerning the development of special equipment and improvement of the technique of the “cold“ gasdynamic method of application of coating for the accomplishment of several specific tasks: (1) development of the technique of application of a fireproof heat-radiating coating to screens made from stainless steel with coefficient of thermal radiation ε≥0.7; (2) development of technique of sealing (“curing“) of microleaks on the weld joints of the propellant tanks made of aluminum alloys; (3) study of the opportunity of sealing of joints of parts made from heterogeneous materials; (4) development of process for copper and nickel coating application for aluminium heat exchangers soldering.……