High-Temperature Interactions between Coal Char and Mixtures of calcium Oxide, Quartz, and Kaolinite

摘要

The interaction between coal char and mixtures of calcium oxide, quartz, and meta-kaolinite were investigated by heating to 1600 deg.C under Ar. Calcium oxide was gradually reduced by coal; char in the temperature range 950-1450 deg.C, and then rapidly carbided above 1450 deg.C, releasing CO. In the case of CaSiO_3, the carbothermal reduction of the SiO_2 component started at 1200 deg.C In preference of the CaO component, forming SiC and Ca_2SiO_4; at higher temperature, both of The SiO_2 and CaO components in Ca_2SiO_4 were carbided significantly.