REFRACTORY CONCRETE Russian patent published in 2006 - IPC C04B35/66 C04B28/26 C04B111/20 

FIELD: refractories.

SUBSTANCE: object of invention are refractory concretes appropriate for use in structures exposed to temperature up to 1000°C, especially for lining of aluminum casting equipment, e.g. ladles, dispensing means, gutters. Refractory concrete is composed of, wt %: finely ground wollastonite with particle size less than 0.15 mm, 28-30; wollastonite with particle size 0.15-5.00 mm, 23-24; wollastonite with particle size 5.00-10.00 mm, 28-32; sodium silicofluoride, 1.1-1.3; liquid glass with density 1360-1380 kg/m³, 11-13. Finely ground wollastonite has preferably particle size less than 0.085 mm. Concrete is characterized by elevated thermal resistance and residual resistance to shrinkage as well as by lack of gluing of slags to surfaces, in particular lining, in contact with molten aluminum.

EFFECT: prolonged lifetime of aluminum casting equipment.

2 cl, 1 tbl