The effect of chemical production waste ― aluminum-alkali sludge on the phase composition of porcelain stoneware

The influence of aluminum-alkali sludge on the phase composition of porcelain stoneware based on kaolin clay has been studied. Porcelain stoneware with high physical and mechanical properties was obtained. at a firing temperature of 1250 o C. X-ray phase and IR-spectroscopic analyses showed the presence of quartz, cristobalite, mullite, corundum and glass phase in the porcelain stoneware, and the content of the latter is not less than 50 %. High physical and mechanical parameters (strength, frost resistance, heat resistance, etc.) corundum and mullite give porcelain stoneware. RF patent 2768886 was obtained for the developed formulations. Ill. 4. Ref. 20. Tab. 3.