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从矿山采集具有代表性的粘土,球磨并过80目筛备用。利用X射线荧光光谱仪(XRF)、X射线衍射仪(XRD)、综合热分析仪(DTA-TG)、场发射扫描电子显微镜(FE-SEM)和透射电子显微镜(TEM)对粘土的化学成分、矿物组成、理化性质和微观形貌进行了表征,并详细考察了其多项工艺性能指标。研究结果表明:该粘土的主要矿物组成为白云母(27.69wt%)、高岭石(33.12wt%)、石英(35.31wt%)和板钛矿(0.91wt%),呈典型的片状结构。该矿物原料可塑性非常好、阳离子交换容量低、流动性较大、触变性较小、干燥收缩很小、干燥强度较大。由于该粘土矿物中碱金属和碱土金属总含量不高(4.73wt%),因此烧结温度较高(烧结温度范围为1250℃～1300℃),并且其含有较多的Fe2O3(1.22wt%)和TiO2(0.90wt%),导致烧成(1250℃)白度较低,仅为41.12%。
Representative from the mine collection of clay, ball mill and 80 mesh sieve spare. The chemical constituents of clay were characterized by X-ray fluorescence (XRF), X-ray diffractometer (XRD), integrated thermal analyzer (DTA-TG), field emission scanning electron microscope (TEM) and transmission electron microscopy (TEM) Mineral composition, physical and chemical properties and micro-morphology were characterized, and a detailed examination of a number of its performance indicators. The results show that the main minerals of this clay are muscovite (27.69wt%), kaolinite (33.12wt%), quartz (35.31wt%) and brookite (0.91wt%), . The mineral raw material plasticity is very good, low cation exchange capacity, greater mobility, smaller thixotropy, dry shrinkage is small, dry strength greater. Since the total content of alkali metals and alkaline earth metals in the clay minerals is not high (4.73 wt%), the sintering temperature is high (sintering temperature range is 1250 ° C. to 1300 ° C.) and it contains more Fe 2 O 3 (1.22 wt%) and TiO2 (0.90 wt%) resulted in a lower degree of whiteness of only 41.12% at firing (1250 ° C).