XIAO Haiping, ZHOU Junhu, LIU Jianzhong, et al. Kinetics of reaction between CaS and CaSO4 under N2 atmosphere[J]. CIESC Journal, 2005, (7): 1322-1326.
XIAO Haiping, ZHOU Junhu, LIU Jianzhong, et al. Kinetics of reaction between CaS and CaSO4 under N2 atmosphere[J]. CIESC Journal, 2005, (7): 1322-1326.DOI:
The reaction between CaS and CaSO4 with different molar ratios in N2 atmosphere was investigated with a Metteler Toledo thermogravimetric analyzer.In this work
the chemical reaction kinetics and mechanism were discussed in detail.The reaction between CaS and CaSO4 was the rate-controlling step in the oxidation of CaS to CaO.When CaSO4 was in excess
the reaction proceeds in two steps.The apparent solid-solid reaction between CaS and CaSO4 started at 890 ℃ and ended at 1120 ℃.Then the residual CaSO4 continued decomposing in the range of 1160—1330 ℃.When the molar ratio of CaSO4 to CaS was 3
the maximal activation energy of 302.46 kJ8226;mol-1 was obtained.The reaction mechanism could be explained by a eutectic liquid model.