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In a zone ekzotermicheskih reactions (1100-1250°С) pass tver-dofazovye reactions of formation ЗСаО-А12О3; 4CaO-Al2O3-Fe2O3 and belita. These ekzotermicheskie reactions are accompanied by allocation of a considerable quantity of heat (to 420 kdzh on 1 kg klinkera) and intensive rise in temperature of a material (on 150-200°С) on rather short site of the furnace (5-7% of its length). subaru forester .
In a sintering zone (1300-1450-1300°С) the temperature of a burnt material reaches the highest value (1450°С), a material necessary for partial fusion and formation of the main mineral klinkera - alita. In the sintering beginning, since 1300°С, it is formed rasplav of rather fusible minerals, and also MgO and fusible impurity in number of 20-30% of volume of the burnt weight. at rise in temperature to 1450°С in klinkernoj liquids are dissolved also by SaO and from them in rasplave there is a formation process alita, passing almost before full linkage okisi calcium (in klinkere SaOsvob no more than 0,5-1%).
In rasplave (on Buttu and Timashev) tetrahedrons SiO44 ~ which then incorporate to ions of Sa2 +, forming a crystal lattice trehkaltsievogo silicate at first are formed. Alit it is badly dissolved in rasplave and thereof it is allocated from it in the form of small crystals that attracts dissolution in rasplave new portions. process of formation alita comes to an end for 15-20 mines of stay of a material in a sintering zone (its extent of 10-15% of length of the furnace).
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