Dolomite Refractory and Atmosphere in Burning Zone of Cement Kiln

Abstract

Sulfides such as CaS，K2SO4，etc．are formed in the dolomite refractories used in　burning　zone　of　cement　kiln． 　　 In this paper，conditions for formation of the compounds such as the sulfides were clarified thermochemically，and atmosphere in the burning zone was estimated in　the　case　of 1700K　as　follows； 　　 Partial pressure of oxygen was in －6・636＞log PO2＞8・82．　Main gas species were CO2（g），CO（g）， H2O（g），SO2（g），H2（g），S2（g）・K2SO4（g），etc．and　each　partial　pressure　was　obtained．