RAW MIXTURE FOR CEMENT CLINKER PREPARING Russian patent published in 1995 - IPC

FIELD: building industry. SUBSTANCE: raw mixture has lime, clay and shale ash slag. Clay components has, wt.-%: MgO 1-6; SO₃ 3.2-6; R₂O 2.5-3.5. Ash slag has up to 25% CaO and has the following grainy composition, %: fraction above 40 mm 10; 40-5 mm 25; 5-3 mm 30; 3-0.1 mm 35. Iron-containing component has, wt.-%: MgO 0.1-0.8; SO₃ 3.3-6.7. Ratio of mixture components, wt. -% : clay component 13.3-18.7; shale ash slag 13.45-20; iron-containing component 0.28-0.33, and lime component - the rest. EFFECT: enhanced quality of raw mixture. 2 tbl