PROCESS FOR PRODUCING OF HIGH-PURITY ALUMINA AND HYDRAULIC CEMENT

摘要

The present invention provides a process for producing of high-purity alumina and hydraulic cement from low-grade aluminium carriers by means of extraction of a disintegrating product obtained as a result of the phase conversion of dicalcium silicate, characterized by homogenizing the starting mixture expediently pulverized in common together with limestone, heating to a temperature of 700 to 900.degree.C in direct and/or counterflow heat exchange in a heat exchanger system, then keeping in a rotary kiln at sintering temperature for 5 to 10 minutes and finally, converting into alumina and hydraulic cement in a known manner.