Receiving clincer from iron and steel production wasters

By means of burning at different temperature conditions of a two-component raw mix consisting of iron and steel production wastes: blast-furnace slags wastes - li-mestone wastes ratio of 2:3, correspondingly, clinker samples were obtained, chemical analysis of which showed correspondence of their chemical composition to the chemical composition of the standard clinker. Laboratory testing proved high strength values for all the clinker samples. Processing of metallurgical wastes that are accumulated in the dumps in large quantities and have harmful effects on the environment, is relevant now, especially for low-cost PC (Portland cement) clinker production, the production of which by existing technologies is expensive and energy consuming, accompanied by a significant consumption of natural resources and energy, harmful emissions of dust and gas in the atmosphere. The aim is to develop the technological scheme of PC clinker production. The hydraulic module (m = 2,37) of 2-component mixtures of raw materials: 40% of slag waste + 60% of limestone waste has been defined. Mechanical activation of cement components has been found to promote the blast furnace slags activity. It has been stated that slags should be subjected to fine grinding(S ≥ 0,6 m2/g) while PC clinker should be sub-jected to fine crushing (S = 0,3 m2/g). Jet grinding can reduce 4-5 times the content of expensive clinker in cement, and reduce 4-5 times СО2 emissions. The process for producing clinker from metallurgical wastes and cement production from blast furnace slag are protected by patents of Ukraine