鄂州钙基膨润土钠化改型研究

Study on Na-modification of Ezhou Ca-bentonite

以湖北鄂州钙基膨润土为原料,采用悬浆钠化改型工艺,系统研究了单一改型剂钠化改型的各种因素对产品性能的影响。结果表明,Na2CO3改型可以分别将胶质价和膨胀容由原矿的100ml/15g、11.0ml/g提高到500ml/15g、57.1ml/g,而NaF则可以分别将胶质价和膨胀容提高到450ml/15g、68.0ml/g,单一改型剂钠化效果明显。由单一改型剂和两种改型剂互配改型效果对比表明,Na2CO3与NaF以质量比7∶3互配可以较好地改善膨润土的理化性能,其胶质价和膨胀容可以达到500ml/15g、74.6ml/g,明显高于单一改型剂的指标。

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 prepared 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.