In different countries the problem of cement kiln dust generated in cement clinker production where its amounts up to 13% of the total amount of clinker produced. Dust is returned with raw meal together into kiln. In this case quantity of dust increases by 20-30% and alkali content in clinker increases too. Disadvantages of this method is the difficulty in clinker burning. On dependence of the raw material composition dust alkali can be represented by Na{sub}2SO{sub}4 or K{sub}2SO{sub}4. This present work attempt at etching a picture of the role of volatile constituents in the making and use of cement, where special emphasis has been laid on the interactive role of K, Na, S, Cl. Using by-pass system and adjustment of its percentage we can control alkali content in clinker using installation by-pass ratio.
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