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《Non-Metallic Mines》 2007-05
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Study on Iron-removing and Bleaching of Attapulgite Clay by Microwave Catalysis

Wang Qingning Tian Jing Li Lan Li Ning (Lanzhou University of Technology,Lanzhou 730050 )  
Due to most part of attapulgite clay contains iron oxide or iron hydroxide,thus the attapulgite clay has red colour and its application is limited.Taking attapulgite clay from Linze of Gansu province as a sample,it is activated,removed from the impurities and then reacted by microwave liquid phase catalysis in the acidic medium. After separation,circum? uence and at last,the white attapulgite clay is obtained. The results show that this process can not only speed up the reaction velocity and shorten the half time comparing with routine acidifi cation,but also the iron-removing rate of the product can reach 91.2%,the whiteness index can reach 76.4% and refiectivity can reach 58.6%.
【Fund】: 甘肃省攻关项目(2GSO47-A52-001-05)
【CateGory Index】: TD985
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