COMPOSITION FOR PRODUCING REFRACTORY CONCRETE Russian patent published in 2015 - IPC C04B28/34 

FIELD: chemistry.

SUBSTANCE: invention relates to building materials, particularly to the production of refractory concrete (composites) based on chemical binders. The composition for producing refractory concrete contains the following, wt %: carbonate rock chips with grain size of 5-10 mm 25-30, river sand with fineness modulus of 1.68 22-30, H₃PO₄, wherein the weight ratio of orthophosphoric acid is not less than 85%, 10-12, spent IM-2201 catalyst, containing oxides, wt %: SiO₂ - 7.90; Al₂O₃ - 74.5; Fe₂O₃ - 0.15; MgO - 0.10; Cr₂O₃ - 14.8; R₂O - 1.57, 10-13, aluminium-containing sludge from caustic etching of aluminium, containing 80% particles with a size smaller than 20 mcm and oxides, wt %: SiO₂ - 2.5; Al₂O₃ - 45.2; Fe₂O₃ - 1.4; CaO - 1.2; MgO - 5.2; R₂O - 9.8; ignition loss - 34.7, 10-13, calcium-containing sludge from treatment of aluminium with carbonate sludge formed from softening water, containing 80% particles with a size smaller than 20 mcm and oxides, wt %: SiO₂ - 8.1; Al₂O₃ - 14.2; Fe₂O₃ - 0.7; CaO - 27.4; MgO - 8.1; R₂O - 1.4; ignition loss - 39.1, 10-15.

EFFECT: high ultimate compression strength and heat-resistance of refractory concrete, recycling industrial wastes.

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