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一、概况膨润土工业是个新兴的工业,在世界上只有七十年的发展史。它是一门材料工业,是为其他工业服务的,它的发展依附于其他工业的发展,受铸造、石油、球团工业的影响很大,膨润土工业的发展是随着他们的发展而发展的。美国膨润土工业分五个发展阶段第一阶段是二十年代,美国用膨润土做活性白土,三十年代用膨润土作钻井泥浆,到1940年,膨润土产量达到25万吨。第二阶段是四十年代,膨润土年产量达到
First, an overview Bentonite industry is a new industry, in the world only 70 years of development history. It is a material industry, which serves other industries. Its development is dependent on the development of other industries. It is greatly influenced by the foundry industry, oil industry and pellet industry. The development of the bentonite industry is developing with their development . Bentonite industry in the United States divided into five stages of the first phase of development in the 1920s, the United States as bentonite clay, the 1930s bentonite drilling mud, by 1940, bentonite production reached 250,000 tons. The second stage is the forties, bentonite annual output reached