CEMENT

[:ru]Саницкий М. А.[:en]Sanitsky M. A.[:] [:ru]д. т. н., Национальный университет «Львовская политехника», г. Львов[:en]Doct. Eng. Sci., The National University «Lvov’s Polytechnics», Lvov[:]

[:ru]Маркив Т. Е.[:en]Markiv T. E.[:] [:ru]к. т. н., Национальный университет «Львовская политехника», г. Львов[:en]Cand. Eng. Sci.,The National University «Lvov’s Polytechnics», Lvov[:]

[:ru]Круць Т. Н.[:en]Krutz T. N.[:] [:ru]ОАО «Ивано-Франковскцемент», Украина[:en]OJSC «Ivano-Frankovskcement», Ukraine[:]

Alitinform №6 (12) 2009 г. 44-49 p.

Abstract

The problem of reducing of cement manufacture’s energy consumption is one of the main tasks of cement industry. Taking into consideration the technological process of Portland cement clinker burning, it is possible to produce, depending on a kind of combustible waste and a type of cement kiln, certain types of alternative fuels, which allows to obtain substantial economic effect. Nowadays European cement industry uses more than 6 million tons of alternative fuels produced from combustible waste, which amounts about 17 % of fuel energy demand. Moreover, in some cement plants the alternative fuels share reaches up to 40–70 %. Wide application of secondary fuel materials is also planned in Ukraine, particularly in cement plants OJSC «Ivano-Frankovskcement», OJSC «Nikolaevcement» and others [1–3].

Requirements to alternative fuels are predetermined by production specifics and cement clinker properties, as well as by economic conditions. Fuel quality is characterized, first of all, by its chemical composition, and by content of chemical elements as impurities, in particular. For maintaining the process of cement clinker burning, the most effective are alternative fuels with high calorific capacity, which is equivalent to that of natural fuels. High temperature in the kiln and the possibility to introduce alternative fuel in different places allows to burning almost all kinds of secondary fuels. However, taking into consideration the temperature conditions which have to be provided in the cement kiln to produce high-grade clinker and needed economical effect from using alternative fuels, the calorific capacity of combustible waste should exceed 15 MJ/kg.