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《Non-Metallic Mines》 2009-01
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Study on Na-modification of Ezhou Ca-bentonite

Hu Xuefeng Guan Junfang Cao Mingli Wang Erpeng(School of Resource & Environmental Engineering,Wuhan University of Technology,Hubei Wuhan 430070 )  
Using Ca-bentonite produced from Ezhou Hubei province as raw materials and adopting the solution Na-modification technology,the effects of various factors on single Na-modifier were researched systematically.The results showed that the colloid index and expansive capacity of the superior-quality Na-bentonite modified by Na2CO3 could be increased from 100ml/15g and 11.0ml/g of raw bentonite to 500ml/15g and 57.1ml/g respectively,meanwhile the colloid index and expansive capacity of the superior-quality Na-bentonite modified by NaF could be increased from 100ml/ 15g and 11.0ml/g of raw bentonite to 450ml/15g and 68.0ml/g repectively.The effects of modification by single Na-modifier were obvious.The results of single Na-modifier and mixed Na-modifiers showed that the physical and chemical properties were improved when the mixed Na-modifier was pre-pared with sodium carbonate and sodium fluoride at the quality ratio of 7∶3.The colloid index and expansive capacity would come to a perfect result,500ml/15g and 74.6ml/g respectively,which were obviously higher than the Na-bentonite modified by the single Na-modifier.
【CateGory Index】: TD985
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