Chemistry of Nepheline Formation in the Batch Mixture in Ceramic Production

Under the conditions of preliminary treatment during the preparation to annealing of a mixture of Tuva clays with the dearsenation cake of the Khovu-Aksy dump sludge, the material was found to undergo a chemical process that forms nepheline. Based on the calculated Gibbs energies of the reactions, it was concluded that the reaction occurs at the minimum number of components in the system: silicate Na 4 Mg 2 Si 3 O 10 –kaolinite (kaolinite + orthoclase).