Using of wastes from the enrichment of quartz-feldspar raw materials in the production of porcelain stoneware

Abstract

The need to create resource-saving technologies of building materials using closed-loop production (CLP) has been analyzed. The features of the use of waste in the production of ceramic tiles, their influence on the properties of materials and possible limitations have been determined. The composition of the ceramic mass with the use of waste from the enrichment of quartz-feldspar raw materials of «Maydan-Vilsky Quarry» LLC has been developed. The results of the study of the chemical composition of KRM-12 established that the composition of its residue is characterized by a high content of silicon and potassium oxides, which allows us to conclude about a significant content of pegmatite. The chemical composition of the residue QRM-12 is characterized by an increased content of aluminum and potassium oxides, which indicates the presence of dispersed kaolin and pegmatite crystals. A feature of QRM-12 is increased plasticity – 9 units. The influence of the proposed composition on the characteristics of finished products is determined. Interpretation of the «mullite–silica–leucite» phase diagram showed that crystallization and grain growth are closely related to the amount and viscosity of the liquid phase present at the firing temperature. The technological and economic feasibility of using pegmatite enrichment waste in the production of competitive building materials is shown.