页岩灰制水玻璃的试验研究

Experimental Study of Water Glass from Oil Shale Ash

页岩灰为油页岩及其半焦的燃烧产物,可作为建筑原材料、化工填料和吸附剂等,具有一定的工程应用价值。为研究页岩灰制取水玻璃的最佳条件,分别以水玻璃模数和页岩灰中SiO2溶出率为指标,NaOH溶液质量分数、物料比(NaOH溶液与页岩灰的质量比)、碱浸时间和碱浸温度为影响因素,进行了正交试验。对正交试验结果进行了极差分析和方差分析,两种分析方法得出的结论一致。最优方案分别为NaOH溶液质量分数10%、物料比1∶1、反应时间6h、反应温度100℃和NaOH溶液质量分数40%、物料比1∶1、反应时间8h、反应温度100℃.经验证,最优方案的水玻璃模数和SiO2溶出率分别为4.816和94.337%,为最优试验结果。

Oil shale ash, an inorganic byproduct of burning oil shale and retored shale, can be used as building material, chemical filling material and absorbent, etc which had certain value in engineering. In order to determine the optimal conditions of water glass from oil shale ash, through orthogonal experiment, the influences of correlative parameters including NaOH concentration, material ratio （NaOH to oil shale ash in weight）, reaction time and reaction temperature on the modulus of water glass or deliquescent rate of SiO2 were all studied. The level difference and square difference analyses were applied to the orthogonal experiment, and results of two methods were identical. The optimal scheme was referred to as NaOH concentration being 10%, material ratio being 1：1, reaction time being 6 h and reaction temperature being 100 ℃ or NaOH concentration being 40%, material ratio： 1：1, reaction time being 8 h and reaction temperature： 100 ℃. It was verified that the optimal experiment results were that the modulus was 4.816 and the deliquescent rate was 94.337%.