Host: The Japan Society of Waste Management Experts
A sulfate pitch has been treated by neutralization-incineration, where neutralization product (calcium sulfate) is generated. The advantage was proven in experiments of laboratory and actual incinerator. Furthermore, characteristics of thermal decomposition of calcium sulfate in organic substance were verified and it was confirmed that reductive decomposition accelerated the thermal decomposition. Successively, experiments of decomposition of calcium sulfate in inorganic salts were recently carried out by quartz-tube combustion method to investigate a variation of thermal decomposition.And it is confirmed that eutectic of calcium sulfate and calcium oxide accelerated thermal decomposition, which means that excess neutralization agent, lime, causes acceleration of thermal decomposition of calcium sulfate. Then it is required to control the amount of lime adequately so as to reduce thermal decomposition of calcium sulfate in the subsequent operation.
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management
