Effect of cryogenic treatment on disintegration of clay aggregates in washing drum

Challenges for Development in Mining Science and Mining Industry

Shirman, G.V.^1

Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia^1

关键词: Alluvial clay;    Clay aggregates;    Disintegration efficiency;    Freeze-thaw cycles;    Freezing-thawing;    Laboratory models;    Sand washing;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/262/1/012071/pdf
DOI  :  10.1088/1755-1315/262/1/012071

来源: IOP

【 摘 要 】

The article addresses the problems arising in alluvial clay sand washing in drum-type machines. The author proposes a method to increase disintegration efficiency by cryogenic treatment of initial sands. The results of the experimental studies on formation and destruction of dense clay aggregates in the laboratory model of a washing drum after preliminary freezing-thawing are presented. The investigations have experimentally proved that after 3 freeze-thaw cycles in the temperature range from 243 K to 293 K, a high-clayey lump breaks down at the first minute of disintegration and dissolves in the washing medium, which eliminates subsequent formation of compact clay balls.