The recycling of industrial waste clays for production of an interesting ceramic product is the main goal of the present research work. Ceramic bodies were prepared using Feeders or Cyclons waste clays, sand and feldspar. 0.0, 15, 20, and 25 wt.% of sand were added at the expanse of kaolin (75-50 wt.%). Constant mass percent (25 wt.%) of feldspar was added for all ceramic compositions. The designed batches were sintered at 1200–1400 °C. Physical properties were determined by water displacement method. Phase composition and microstructure were investigated by x-ray diffraction and scanning electron microscope, respectively. The compressive strength was also determined. The results indicated that the ceramic bodies prepared from Cyclons’ waste clay exhibited higher physical and mechanical properties than that prepared from Feeders’ clay after sintering at 1400 °C. The addition of sand enhances the porosity, water absorption, bulk density and mechanical strength after sintering at 1400 °C due to the formation of mullite network and glassy phases.

中文翻译：

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某些陶土的回收和利用，用于烧结陶瓷坯体的生产

回收工业废粘土以生产有趣的陶瓷产品是当前研究工作的主要目标。陶瓷体是使用Feeder或Cyclons废粘土，沙子和长石制备的。在高岭土（75-50重量％）的范围内添加0.0、15、20和25重量％的沙子。对于所有陶瓷组合物，添加恒定质量百分比（25重量％）的长石。设计的批次在1200–1400°C下烧结。物理性质通过水置换法测定。通过X射线衍射和扫描电子显微镜分别研究了相组成和微观结构。还确定了抗压强度。结果表明，在1400°C烧结后，由Cyclons的废粘土制备的陶瓷体比由Feeders的粘土制备的陶瓷具有更高的物理和机械性能。由于形成了莫来石网络和玻璃态相，在1400°C烧结后，添加砂子可以提高孔隙率，吸水率，堆积密度和机械强度。