METHOD FOR PRODUCING HEAT-RESISTANT CONCRETE MIXTURE AND PRODUCTS BASED ON IT Russian patent published in 2021 - IPC C04B28/08 

FIELD: metallurgy; chemical industry.

SUBSTANCE: invention relates to a technology for producing a heat-resistant concrete mixture and products based on it, used in the metallurgical and chemical industries, as well as during the operation of heat-insulating units. The method of obtaining a heat-resistant concrete mixture is characterized by the fact that the process is carried out in three stages: at the first stage, the dust of nepheline concentrate is mixed with water in a mixer and then the resulting suspension is heated to a temperature of 110°C, after which ferrosilicochrome dust is fed into the working mixer, mixed with suspension and the mixture is heated to a temperature of 150°C for 4-5 hours, the resulting aluminosilicate adhesive bond is transferred to the second stage in a two-roll mixer, in which it is mixed with open-hearth slag crushed in a disintegrator to a size of 2-3 mm, where additionally tricalcium aluminate С3А, then the mixture is transferred to the third stage in a combined fluidized bed dryer, where it is dried at a temperature of 150°C for 4-5 hours and simultaneously ground to a particle size of 1 mm with the formation of tricalcium hydroaluminate, and the ratio of the initial components of the waste is , wt%: dust of nepheline concentrate 55-60, dust mic rock-silica 10-11, open-hearth slag 20-23, industrial water - the rest. Also described is a method of manufacturing heat-resistant concrete products from a concrete mixture.

EFFECT: invention ensures environmental improvement and increases heat resistance of products.

2 cl, 1 tbl, 1 dwg