膨润土是以蒙脱石为主要矿物成分的粘土类矿物,其化学通式可表示为: Na_2(H_2O)_4{(Al_2-XMg_x)[Si_4O_(10)](OH)_2} 世界已探明的储量达20亿吨以上。美国是最大的膨润土资源国,储量近8亿吨。苏联有28个矿床,储量达3亿吨。我国膨润土资源仅次于美国,居世界第二位,矿床遍及17个省区,已发现膨润土矿床300多个。由于近年来在辽宁、浙江、河南相继发现了新的钠基膨润土矿床,使我国优质钠基膨润上的储量占总储量的50%以上,其矿石质量与美国怀俄明膨润土相近。我国 Bentonite is a clay mineral with montmorillonite as its main mineral component. Its chemical formula can be expressed as: Na 2 (H 2 O) 4 {(Al 2 -XMg_x) [Si 4 O 10] (OH) 2} Reserves up to 2 billion tons. The United States is the largest country of bentonite resources with a reserve of nearly 800 million tons. The Soviet Union has 28 deposits with reserves of 300 million tons. Bentonite resources in China after the United States, ranking second in the world, deposits in 17 provinces and autonomous regions, has found more than 300 bentonite deposits. In recent years, new sodium-bentonite deposits have been found in Liaoning, Zhejiang and Henan successively, making our reserves of high-quality sodium-based swelling accounted for more than 50% of the total reserves, and their ore quality is similar to that of Wyoming bentonite in the United States. My country