Stability of xanthates in sulfite media

Journal of Mining Science -     

铁坑褐铁矿选矿新工艺研究

在选矿工艺矿物学特性研究的基础上,对铁坑褐铁矿进行了强磁-阳离子反浮选新工艺的研究,通过合理使用高效选矿设备及浮选药剂,使铁坑褐铁矿各项技术指标上了一个台阶.     

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.     

某铁矿露天开采程序所究

某铁矿露天采场的上下部剥采比相差悬殊，３个主矿体矿量分布很不均衡。设计中通过开采程序研究，选择了适合该矿特点的开采程序方案。文中着重论述了储量最大、开采条件最复杂的西矿体５个开采程序方案的比较与确定。     

井下低压电网智能化综合保护系统的研究

在分析目前煤矿井下综合保护系统存在问题的基础上,设计了一种新型的以MSP430单片机为核心的智能化综合保护系统,本文重点分析了系统的基本保护原理,并介绍了系统的硬件和软件。现场运行表明该保护系统性能稳定,动作可靠,具有良好的应用价值。     

企业IT系统集成设计技术分析

对企业IT系统集成技术现状和未来系统集成技术的发展进行了分析,指出应结合各企业 的IT系统应用现状指定相应的系统集成技术方案,强调了在实际实施过程中应采用以一种技术 为主、多种技术共存的实现方式,以最好的经济效益满足企业发展的需求。     

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.……