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Vol 198
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Factors of alumina dust formation in primary aluminum production

V. M. Sizyakov1
A. A. Vlasov2
V. Yu. Bazhin3
V. V. Gembitskii4
About authors
  • 1 — National Mineral Resources University (Mining University)
  • 2 — National Mineral Resources University (Mining University)
  • 3 — National Mineral Resources University (Mining University)
  • 4 — National Mineral Resources University (Mining University)
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All types of raw materials used in aluminum production, are finely dispersed structures, which cause dusting during manufacturing operations, which leads to the formation of substandard raw material deposits. Their turnover in primary production contributes to the deterioration of techno-economic parameters of the  process. Alumina dust samples werea  collected  with  a mark of 16,0 meters  on  aluminum smelters in Russia, in the process of various technologies application. While in the upper layers alumina absorbss moisture, fluorides, and carbon. Penetration of fluoride in the amount of alumina particles depends of the crystallographic characteristics of the grains. At high stratification of the particles, fluorides are evenly distributed on the surface, and in the bulk of the particles. Mostly solid fluorides penetrate into cracks and deformation of the grains of alumina  and hydrogen fluoride is adsorbed on the surface with the formation of aluminum   fluoride. Alumina dust produced by the company operating for a long time with the cryolite ratio 2,2-2,35, contains a large amount of silicon. Silicon compound coat grain acicular alumina film.

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  2. Исаева Л.А. Пыление и текучесть глинозема с различными физико-химическими свойствами / Л.А.Исаева, А.Б.Браславский, П.В.Поляков // Изв. вузов. Цветная металлургия. 2008. № 6. С.20-26.
  3. Козьмин Г.Д. Освоение и эксплуатация автоматической подачи глинозема в электролизеры / Г.Д.Козьмин, В.Т.Бикмурзин // Современные тенденции в развитии металлургии легких металлов: Сб. трудов / ВАМИ. СПб, 2001. С.98-108.
  4. Кондратьев В.В. О потерях глинозема при производстве алюминия на электролизерах с верхним токоподводом / В.В.Кондратьев, Э.П.Ржечицкий // Алюминий Сибири-2005 / ООО «Версо». Красноярск, 2005. С.76-84.
  5. Метляева О.В. Изучение возможности снижения потерь при электролитическом получении алюминия / О.В.Метляева, Л.Е.Сафарова // Современные проблемы в развитии металлургии легких металлов: Сб. трудов / ВАМИ. СПб, 2001. С.303-306.
  6. Сизяков В.М. Расход глинозема на алюминиевых заводах России / В.М. Сизяков, В.Ю.Бажин, А.А.Власов // Современные технологии освоения минеральных ресурсов: Сб. трудов / СФУ. Красноярск, 2010. С.25-32.
  7. Уэдде Г. Контроль выбросов в алюминиевой про- мышленности // Алюминий Сибири-2003 / ООО «Версо». Красноярск, 2003. С.8-21.
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