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bentonite grinding plant-nonmetallic processing plant ... &#; Bentonite is a kind of clay rock,also called montmorillonite clay rock. Mainly include small amounts of illite,kaolinite,halloysite,chlorite,quartz,feldspar,zeolite,calcite and so on.White or faint yellow,because of iron content changes,it also shows pale gray,light green,pink,brown red,brick red,and gray black etc. …