METHOD OF MAKING HEAT-RESISTANT CONCRETE MIXTURE AND METHOD OF MAKING ARTICLES FROM HEAT-RESISTANT CONCRETE MIXTURE Russian patent published in 2019 - IPC C04B28/08 C04B18/14 

FIELD: technological processes.

SUBSTANCE: invention relates to methods of producing concrete mixture and heat-resistant concrete articles suitable for making lining of industrial heat and refractory units, in particular for lining firing bricks and other units. In the method of producing heat-resistant concrete mixture, which includes mixing chamotte filler and self-decomposing ferrochromium slag, according to the invention, chamotte filler used is chamotte flue dust in amount of – 11.1…12.2 %, self-decomposing ferrochrome slag in amount of 13.8…15.4 %, additionally, the following is added: spent aluminum alloys etching solution – 40.0…42.0 % and nickel slag in amount of 30.4…35.1 %, mixing is carried out in a reactor at pH 7.7…8.5 and T = 150…155 °C, then mixture is ground to particle size 4…7 mm in disintegrator. Besides, the technical result is achieved due to that in the method of making articles from heat-resistant concrete mixture containing self-decomposed ferrochrome slag and chamotte filler, including its hardening, according to invention, said concrete mixture is produced according to said composition, compacted on vibrating bench, and hardening is performed in hot treatment in hot air chamber at temperature 150…155 °C for 6 hours and obtain article with strength equal to and less than 85…90 MPa. Proposed method makes it possible to efficiently use production wastes that do not find wide industrial application, improve environment, obtain strong heat-resistant concrete products.

EFFECT: improvement of environment ecology due to use for production of concrete mixture of production wastes processed with low power consumption, and production of heat-resistant concrete products with high strength (at least 85…90 MPa).

2 cl, 1 dwg, 2 tbl