四川龙泉山地区膨润土特征

通过对四川龙泉山地区主要膨润土矿床的膨润土进行物相及物理化学性能测试与分析,总结了该地区膨润土资源特征:膨润土矿床产出于中生代地层中,膨润土化学成分中Na2O含量较高,接近于钠基膨润土,但CaO含量偏高;经X射线衍射分析、差热分析,表明膨润土中的蒙脱石为钙蒙脱石;通过阳离子交换容量及可交换阳离子数目的测试,其主要可交换阳离子为Ca2 和Na ,再结合其具有相对较高的胶质价和较小的膨胀容、弱碱性等特征的综合判断,龙泉山地区膨润土属钙钠基膨润土,且其蒙脱石含量达70%以上,高于国内主要膨润土矿的蒙脱石平均含量,表明该区膨润土质量较好,但仍难以直接利用.然而,由于该区膨润土性质的特殊性和其工业类型的过渡性,决定了对其进行深加工而提高利用价值的条件相对较好.

The characters of bentonite in the Longquanshan area of Sichuan, China

The characters of bentonite from the main deposits in Longquanshan of Sichuan are summarized by a series of mineralogy and physical-chemical tests and analyses.The results show that the bentonite deposits are hosted in the stratum of Mesozoic.The bentonite has high chemical content of Na2O which is close to Na-bentonite,but the chemical content of CaO is also high.The bentonite is validated to be Ca-bentonite by synthetically analysing the result of the test of X-ray and TG-DTA.The tests of cation exchange capacity and number of exchangeable cation show that Ca2 and Na are the mostly exchangeable cations.By synthetically analysing other characters such as relative high colloid index and low expansion value and slightly alkaline,the bentonite is validated to be Ca-Na-bentonite.The montmorillonite content of bentonite from this area is more than 70%,higher than the average content of bentonite from the main deposits in China,but it still can't be used directly.The particular performance of the bentonite and its transitional industry type make it to have a relative good condition for raising the use value by deeply process it.