MIX FOR PRODUCTION OF SILICA BRICK (VERSIONS) Russian patent published in 2007 - IPC C04B28/20 

FIELD: manufacture of building materials; manufacture of articles on base of alkaline binders.

SUBSTANCE: according to the first version, mix for production of silica brick contains sand, alkaline activator and quick lime which are subjected to joint grinding; used as alkaline activator is sodium sulfate-carbonate - waste of alumina production process; mix contains the following components, mass-%: sodium sulfate, no less than 60; sodium carbonate, no more than 30; silicon oxide, no more than 0.5; aluminum oxide, no more than 3.0; iron oxide, no more than 0.4; moisture content of mix does not exceed 30% at the following ratio of components, mass-%: quick lime, 5-10; activator, 0.5-2.0; the remainder being sand. This mix contains sand, quick lime and activator which are subjected to joint grinding till specific surface of no less than 3000 cm²/g has been obtained. Said mix contains additionally fly ash in the amount of 30-40 mass-%; sand, quick lime, activator subjected to joint grinding till specific surface of no less than 3000 cm²/g has been obtained before addition of fly ash. According to the second version, mix contains sand, alkaline activator and quick lime which are subjected to joint grinding till specific surface of no less than 3000 cm²/g has been obtained; used as alkaline activator is sodium sulfate-carbonate - waste of alumina production process; mix contains the following components, mass-%: sodium sulfate, no less than 60; sodium carbonate, no more than 30; silicon oxide, no more 0.5; aluminum oxide, no more than 3.0; iron oxide, no more than 0.4; moisture content does not exceed 30%; size of sand particles is no more than 2 mm; components are contained at the following ratio, mass-%: sand, 38-63.5; quick lime, 5-10; activator, 0.5-2.0; the remainder being sand at size of particles not exceeding 2 mm.

EFFECT: extended sources of raw materials due to use of industrial waste; retained high quality of products.

5 cl, 2 tbl