Application features of clay raw materials from the "Krupeisky sad" deposit for obtaining ceramic building material

Abstract

The article considers chemical, mineralogical and granulometric features of clay raw materials from the "Krupeisky Sad" deposit, presents its technological and color properties. The thermal transformation of clays under firing conditions were studied. It was revealed that clays from the "Krupeisky Sad" deposit were characterized by a high content montmorillonite and fine-grained quartz, which had a negative impact on the technological effectiveness of the process of manufacturing ceramic products. Compositions, including clay raw materials from the "Krupeysky Sad" deposit, quartz sand or granite screenings, burnout additive, as well as a technology for producing ceramic bricks, were developed. It had been established that it is advisable to use granite screenings, because it provides higher strength characteristics of products due to the peculiarities of the mineralogical composition and the shape of the grains. In addition, the optimal content of sawdust (not more than 3.5 wt.%), which allowed to intensify the processes of drying and firing of the material, was determined. The technical and economic efficiency of the developed compositions and technological modes to obtain ceramic bricks were confirmed by test in the conditions of the Production Unitary Enterprise "Loyevsky Combine of Building Materials" JSC "Polesestroy".