Resource saving and energy saving at the simultaneous production of two types of cement

• Published in: IOP conference series. Materials Science and Engineering Vol. 907; no. 1; pp. 12034 - 12040
• Main Authors: Riazanov, A A, Vinnichenko, V I, Riazanov, A N, Rakhimov, R Z, Nedoseko, I V
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.08.2020
• Subjects: Ashes; Carbon dioxide; Cement; Clinker; Flammability; Fuels; High temperature effects; Industrial wastes; Low temperature; Mortars (material); Portland cements; Power plants; Raw materials; Roasting; Silicon dioxide
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/907/1/012034

Modern trends in the development of the global cement industry are to reduce the energy intensity of production and reduce the environmental burden on the environment. These goals can be achieved by using fuel-containing man-made waste in place of natural raw materials and fuel. Great decrease of fuel costs by 20-40 % when making Portland cement is shown to be achieved by combining calcination of both Portland cement clinker and carbonate-silica mix in one heat and technological cycle to get cements with low-temperature calcination. Extra heat effect is achieved by adding combustible industrial wastes, like ashes from power plants or coal waste, to the raw mix to get cements with low-temperature calcination. Further modification of lime-silica cements obtained by Portland cement clinker within 20-40 % range by weights is shown to get mixed product with strength indices in sand mortar corresponding to 0,6-0,8 grade strength of original Portland cement. Combined method for making two kinds of binders is shown to reduce carbon dioxide by 22-60 % calculated as the final modified product as compared with traditional making of Portland cement clinker. When substituting 50 % of clinker part by cements with low temperature calcination with certain composition, grade strength of the mixed product is similar to Portland cement indicators.