铸造用粘土是型(芯)砂和涂料的粘结材料,正确选择和使用粘土对保证铸件质量,实现高产优质低消耗有很大作用。根据含有的粘土矿物种类及其性能的不同,铸造用粘土主要分为普通粘土和膨润土两类。普通粘土和膨润土在粉末状态时,外观很相似,较难分辨。它们的矿物组成也较复杂,还往往含有一些杂质,仅依靠测定其化 Casting clay is a type of (core) sand and paint bonding material, the correct choice and use of clay to ensure the quality of castings, to achieve high yield high quality low consumption has a significant role. According to the type of clay minerals contained and their different properties, casting clay is divided into two types of ordinary clay and bentonite. Ordinary clay and bentonite in the powder state, the appearance is very similar, more difficult to distinguish. Their mineral composition is also more complex, often also contain some impurities, only rely on the determination of its