PHYSICAL, CHEMICAL AND STRENGTH PROPERTIES OF DUSTS FROM THE BENTONITE SANDS TREATMENT PLANTS

Abstract

The investigation results of the physical, chemical and strength properties of dusts from the bentonite sands treatment plants as well as from the reclamation processes of the analogous spent sands, are presented in the paper. The aim of investigations was the determination of preliminary conditions allowing to pelletising dusts in the bowl granulator. The verified examination methods were applied for testing such dust features as: specific density, bulk density of loosely built and of compacted materials as well as related to them porosity, ignition losses and chemical reaction (pH). The grain composition of after reclamation dusts was measured by means of the laser diffraction analysis, allowing to significantly widening the grain size measuring range. The optimal wetting liquid content (in this case: water), at which the water-dust mixture has the best strength properties (formula) was established. Examinations of the moisture content influence on the permeability, compactibility, flowability and friability of samples compacted by means of the standard moulder's rammer were also performed.