温度对煤矸石中提取有效硅的影响研究

STUDY ON MELTING AVAILABLE SILICONE FROM COAL GANGUE INFLUENCED BY TEMPERATURE

以陕西省韩城矿区ll#煤层夹矸型高岭岩为研究对象，于500℃～1300℃范围内的7个温度段进行了煅烧实验，考察了煅烧温度对提取有效硅的影响，并采用X射线衍射（XRD）和差热（DTA）等分析方法深入地了解了煤矸石热活化过程的变化。结果表明，煤矸石热活化的最佳温度为700 C，此时煤矸石中99％为非晶相，形成了一个较为理想的活化区域。

This paper carried out a systematic pilot study on the process of the thermal activation of available silicon from coal gangue, and the influence of temperature was examined. The best calcination temperature was determined from a range of 500 C-1 300 C. Analyzing methods such as X-ray diffraction （XRD） and differential thermal analysis （DTA） were adopted to give a deep insight into the activation of silicon in coal gangue. The results show that the best activation temperature is 700 C ,at which 99 % of the coal gangue is transformed into semi-crystal meta-kaolinite.