Abstrakt

CRYOGENIC STONE CRUSHING: A REVIEW AND PREDICTION

Titov Banerjee, Santanu Bandyopadhyay, Prasanta Kumar Das

Existing stone crushing and size reduction process requires large quantity of electrical power. It creates environmental pollution with dust cloud, health hazards, noise etc, which have adverse effect on human organism and biological environment. It involves much manual labor in the polluted environment. Workers often become sick and sometime they suffer from various diseases. Objective of the research is to establish an alternative approach for stone crushing and size reduction process which would drastically reduce these problems. Material characterization of ceramics like building stones in cryogenic temperature is nowadays a challenging issue. It may find a new dimension in design and development of stone crushing and size reduction process. It is assumed that in cryogenic temperature amorphous materials like building stones require very less impact energy for crushing with minimizing dust cloud, noise pollution, other pollutants and manual labor. The authors purpose here to establish an analytical model for estimation of energy requirement for crushing the stone under cryogenic conditions and also want to predict the critical time of exposure to cryogenic environment for accomplishing the crushing operation. The results in the experiment given in this paper were obtained after an assumed time (40 minutes/ 50 minutes) by which thermal equilibrium was reached.