利用黄金尾矿制备陶瓷清水砖的研究

为了实现黄金尾矿高效资源化利用,以黄金尾矿为主要原料,采用无压烧结制备了陶瓷清水砖样品,研究了黄金尾矿添加量对样品相组成、显微结构及性能的影响。结果表明,当烧成温度为1 100 ℃,黄金尾矿添加量为70%(质量分数)时,样品性能最优,其抗折强度达73.42 MPa,吸水率为0.10%,气孔率为0.25%,体积密度为2.46 g/cm³,烧成收缩为8.64%,达到GB/T 4100—2015《陶瓷砖》中瓷质砖的要求。样品的相组成为钙长石、石英、白榴子石和赤铁矿。清水砖坯釉结合性好,釉面光滑,色泽均匀。

Preparation of Ceramic Facing Brick from Gold Tailings

In order to realize the high value utilization of gold tailings,the ceramic facing brick was prepared by pressureless firing method with gold tailings as the main raw material.The effects of gold tailings addition on phase composition,microstructure and properties were investigated.The results reveal that the sample with 70%(mass fraction)gold tailings fired at 1100℃has the optimal bending strength of 73.42 MPa,water absorption of 0.10%,porosity of 0.25%,bulk density of 2.46 g/cm³ and firing shrinkage of 8.64%.The performance meets the requirements of Chinese national standard GB/T 4100—2015“Ceramic tiles”.The phases of the samples are anorthite,quartz,leucite and hematite.The glaze surface of the facing brick is smooth with uniform color,and the binding property between the body and glaze of the facing brick is excellent.