SILICA LIGHTWEIGHT REFRACTORY Russian patent published in 2009 - IPC C04B35/14 C04B38/06 

FIELD: fire safety.

SUBSTANCE: invention relates to refractories industry, namely to the production of lightweight refractory products for heat unit lining. Silica lightweight refractory is produced from refractory mixture containing, wt %: quartzite - 55-70, coke breeze - 30-45, microsilica - 2-5 (over 100%), mineraliser - 5-7 (over 100%) in the form of interground of limestone, refractory clay and converter residues with the relation in the mixture, wt %: 46-54 limestone, 30-34 refractory clay, 16-20 converter residues. It is preferable for the quartzite to have the coarseness less than 0.09 mm, for the coke breeze - less than 0.5 mm, and the moisture content to account for 15-20 wt %.

EFFECT: silica lightweight refractory is characterised by the improved mechanical strength and porousity, small volume weight and can be used not only as heat insulation but also in bearing structures.

2 cl, 1 tbl