METHOD OF PRODUCING ANHYDRITE-CONTAINING BINDER Russian patent published in 2009 - IPC C04B11/05 

FIELD: chemistry.

SUBSTANCE: invention relates to production of gypsum binding materials, and more specifically to anhydrite-containing binder, and can be used in the industry of construction materials. In the method of producing anhydrite-containing binder, involving thermal treatment of anhydrite-containing raw material, with subsequent grinding, the anhydrite-containing raw material used is wastes from sulphuric acid treatment of boron-containing ore from the Dalnegorsk deposit with anhydrite content of 11 to 20% of the mass of the wastes. Thermal treatment is carried out by heating at 150 to 160°C. Grinding can be done with lime, additionally introduced in amount of 2 to 5 wt % of anhydrite-containing component of the binder.

EFFECT: increased strength of binder.

2 cl, 1 ex