12 research outputs found
КОМПЛЕКСНАЯ ФТОРИДНАЯ ПЕРЕРАБОТКА КИАНИТОВЫХ КОНЦЕНТРАТОВ
There was by theory and experimentally examined physicochemical process of fluoride treatment of kyanite concentrates under action of additional reagents in the range of temperature from 20 to 550 °C and holding time 0,12–4,5 h. There was discovered optimal conditions of feed stock sintering with ammonium bifluoride, sublimation of ammonium hexafluorsilicate, generation of aluminium fluoride and alumina, as well as silica nano particles synthesis. There were defined thermodynamic and kinetic parameters of chemical reactions. As consequence of carrying out investigations was developed fluoride method of alumina receiving from kyanite concentrates with complex recovery of other useful components.Теоретически и экспериментально изучены физико-химические процессы фторидной переработки кианитовых концентратов под действием дополнительных реагентов в интервалах температур 20–550 °С и времени выдержки 0,12–4,5 ч. Выявлены оптимальные условия спекания исходного сырья с гидродифторидом аммония, сублимации гексафторосиликата аммония, образования фторида алюминия, глинозема и синтеза наночастиц аморфного кремнезема. Определены термодинамические и кинетические параметры прохождения химических реакций. В результате проведенных исследований разработан фторидный способ получения глинозема из кианитовых концентратов с комплексным извлечением других полезных компонентов
Development and implementation of a technology for the processing of the electric-furnace slime of complexly alloyed steels and alloys
The need of applying new approaches for using ash produced at coal-fired thermal power stations
Properties of amorphous silica generated by the fluoride method
A study of amorphous silica generated from mineral materials by the fluoride method and by different procedures of analysis., i.e., x-ray diffractio, x-ray fluorescence, IR spectroscopy, and nuclear magnetic resonance, is reported..