摘要
结合我国低热值煤应用的实际,研究了煤矸石-石灰-水预处理工艺及预处理浆体脱水和脱水相的再水化。以活化组份量表征煤矸石的预处理程度,用XRD、SEM、氮吸附、热分析法研究了预处理煤矸石水化相及脱水相的组成、脱水相的水化硬化过程。结果表明,预处理煤矸石在780℃和850℃左右脱水具有良好的水硬活性。为在低温条件下利用煤矸石生产胶凝材料提供了理论依据。
In consideration of better application of coal of low heat value in China, the pretreatment process of coal gangue, the dehydration of pretreated pastes and the rehydration of dehydrated phases were studied. The activated composition were taken to characterize the activation level. By use of XRD, SEM, N_2 absorption, and TG-DTA, composition of the pretreated coal gangue and dehydrated phases, the process of hydration and hardening of dehydrated phases were investigated. Results show that the pretreated gangue dehydrated at about 780℃ and 850℃ respectively have hydration and hardening activity. The paper provides a theorectical basis for producing cementitious materials at low temperature from coal gangue.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1991年第4期312-317,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金
关键词
煤矸石
预处理
脱水相
胶凝材料
coal gangue
pretreatment
dehydration
cementitious materials
