Ceramic bricks based on low-melting clay and ferro-dust were obtained from self-decaying slags of low-carbon ferrochrome in the temperature range 950 - 1100 ° C, which have grades from M100 to M175, respectively. The highest grades are in bricks fired at temperatures of 1050 and 1100 & # 176; C, respectively M150 and M175, which can be used as earthquake-resistant. Studies have shown that at a brick firing temperature of 950 ° C, the appearance of hematite, wollastonite, diopside and a liquid phase is noted. An increase in the firing temperature to 1000 & # 176; С contributes to the appearance of anorthite and cristobalite. An increase in the firing temperature to 1050 ° C does not lead to special changes, with the exception of an increase in the content of cristobalite, anorthite and a decrease in the content of feldspar. A further increase in the firing temperature to 1100 ° C leads to an increase in the content of anorthite, diopside and cristobalite. Physicomechanical parameters increase due to the formation of anorthite and diopside in the samples