| OCR Text |
Show -45- rapid that it can considered not be The CaO* groups figuration approximating displacement reaction ation to the duction the new (see Figure can delay II 1) - steady (causing rate is This induction appr-eciable, rate) may Following reform into the well-crys observed in the start of the is well-crystalliz.ed CaOo the rate is controlled period a result of as When the explained a very quickly reaction ttons, zone. One can The CO? high easily moves mediate material, cao-, steady pressure state condition is reached preceding as a section, very porous a large quan layer through this layer are a .. A constant number of crystalline CaO over the in both direc bridges of the inter group close to an may become activated and thus become 3 CO2 the formation of both active CaO. in the present assumes picture that between this porous layer and the dense calcium carbonate there CaC03 is in nucle is not noticeable where the Under steady state conditions of linear weight loss tity of the crystallized CaO delay After this variable in This indicates that the initially retard con metastable substrate" phase of well-crystallized Cao, state rate, slow some CaCOs period the reaction proceeds rapidly and subsequent and the rhombohedral It is felt that the on some cases controlltng, considered to be in are from the surface this group tallized cubic CaO. . to be rate one of the exposed br-idges, Por,Qsity of calcination product: Calcium oxide formed as a result of decomposition on the surface |
