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首页> 外文会议>International Conference on Single Crystal Growth and Heat amp; Mass Transfer(ICSC-2003) vol.2; 20030922-26; Obninsk(RU) >HEAT AND MASS TRANSFER AND FORMATION OF THIN-FILM STRUCTURES AND NANOCOMPOSITE POWDERS DURING MECHANOCHEMICAL PROCESSING OF MINERAL AND TECHNOGENEOUS RAW MATERIALS OWING TO ABRADANT-REACTIONARY WEAR OF MILLING TOOLS
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HEAT AND MASS TRANSFER AND FORMATION OF THIN-FILM STRUCTURES AND NANOCOMPOSITE POWDERS DURING MECHANOCHEMICAL PROCESSING OF MINERAL AND TECHNOGENEOUS RAW MATERIALS OWING TO ABRADANT-REACTIONARY WEAR OF MILLING TOOLS

机译：铣削刀具的反应性磨损导致的矿物和技术原料的机械化学加工过程中的传热和传质以及薄膜结构和纳米复合粉末的形成

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Numerical modelling of the mechanism and kinetics of chemical interaction of the steel milling tools with treated particles of quartz in a ball planetary mill is carried out for conditions of air access into mechanochemical reactor. It is shown, that alongside with grinding and surface amorphization of quartz particles, takes place mechanochemical synthesis of iron silicates between silicon and iron oxides. Nano-sized particles of iron and iron oxide are formed as a result of abradant-oxidative wear of the steel tools of a mill by quartz particles. The appreciated thickness of the formed layer of iron silicates on the surface of quartz particles makes ～2 nm. A new method of processing of geological and technogeneous materials by realization of mechanochemical reactions with the participation of the material of milling tools is proposed. The essence of the method is the abradant-reaction wear of the milling tools of the mechanochemical reactor. The method has been tested for the preparation of metal-oxide-sulfide nanocomposite powders under processing of: a) tenorite and galena with formation of copper or lead and amorphous iron silicate in the form of compounds on transformed surface of quartz particles; b) sulfur into pyrite during mechanical activation of a mixture of sulfur and abrasive in a planetary ball mill with steel furniture.
机译：针对空气进入机械化学反应器的条件，对球磨机中钢加工工具与处理过的石英颗粒进行化学相互作用的机理和动力学的数值模型进行了建模。结果表明，伴随着石英颗粒的研磨和表面非晶化，发生了机械化学合成硅酸和氧化铁之间的硅酸铁的过程。铁和氧化铁的纳米级颗粒是由于石英颗粒对磨机钢工具的磨蚀性氧化磨损而形成的。石英颗粒表面上形成的硅酸铁层的理想厚度为〜2 nm。提出了一种在铣削刀具的参与下通过机械化学反应实现地质和工艺材料加工的新方法。该方法的本质是机械化学反应器铣削工具的磨料反应磨损。该方法已经过测试，可用于以下过程中制备金属氧化物-硫化物纳米复合粉末：a）ten石和方铅矿，并在石英颗粒的转化表面上形成化合物形式的铜或铅和非晶态硅酸铁； b）在带有钢制家具的行星式球磨机中将硫和磨料的混合物机械活化期间，硫转化为黄铁矿。

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