Study on melting available silicone from coal gangue

Available silicone was melted from coal gangue samples from Hancheng diggings through calcination, digestion, and other means. The best calcination temperaturewas determined from a range of 550-1150^(。)C; and the best time, from a range of 0.5-5 hby colorimetry method. The proper ratio of coal gangue, limestone, sodium carbonate, andcaustic soda was then determined through orthogonal experiment. The results show thatthe proper extraction condition for available silicone is the ratio of coal gangue, limestone,sodium carbonate, and caustic soda at 1:0.5:0.1:0.05, calcination temperature at 700^(。)C,and calcination time at 2 h. In this condition, the available silicone content can be morethan 19.65%.

温度对煤矸石中提取有效硅的影响研究

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。

从煤矸石中提取有效硅的研究

为了从煤矸石中提取出植物可吸收的有效硅,针对韩城矿区高岭岩煤矸石样品,在550~1150℃的煅烧温度和0.5~5h燃烧时间范围内确定最佳温度和时间后,通过正交试验确定了煤矸石与石灰石、烧碱、纯碱等添加剂的最佳比例。试验结果表明,煤矸石与石灰石、纯碱、烧碱按1.00∶0.50∶0.10∶0.05的比例混合,700℃烧结后窑温保持2h,是提取有效硅的最佳方案,在此条件下,有效硅的溶出量可达19.65%以上。