Interaction between calcium oxide and alumina when tempering dinas mixtures

When dinas mixtures are tempered, there is a chemical reaction between the CaO and SiO2. The process is of an adsorption-chemical nature, and the number of reaction products is proportional to the surface of the quartzite grains in the mixture. The rubbing off of neogenes from grains during tempering in the mill leads to an increase in the number of them, compared with the theoretical figure.