金云母蛭石间层矿物的酸浸取物与酸蚀机理研究  

The acid corrosion mechanism and the soak-out substances after treating phlogopite-vermiculite interstratification minerals with hydrochloric acid

作　　者：彭同江[1] 刘福生[1] 张宝述[1] 孙红娟[1] 

机构地区：[1]西南科技大学矿物材料及应用研究所,四川绵阳621010

出　　处：《岩石矿物学杂志》2005年第6期622-628,共7页Acta Petrologica et Mineralogica

基　　金：国家自然科学基金资助项目(40102006)

摘　　要：对采自新疆尉犁蛭石矿的金云母蛭石间层矿物样品进行了酸处理实验研究。在样品化学成分和XRD分析的基础上,研究了样品酸处理后酸浸取物的化学组成、含量及结构变化特征;分析讨论了金云母蛭石间层矿物在酸处理过程中不同阳离子浸出率的变化规律和酸蚀机理。结果表明,层间可交换性阳离子的氧化物CaO和Na2O的酸浸取率最高,层间不可交换性阳离子的氧化物K2O次之,八面体中阳离子的氧化物MgO、Fe2O3和Al2O3具有较高的酸浸取率,而四面体阳离子的氧化物Si O2的酸浸取率最低;金云母蛭石间层矿物中蛭石晶层含量高的样品酸浸取率高,金云母蛭石间层矿物的耐酸蚀性能不如金云母。The phlogopite-vermiculite interstratification mineral samples from the Weli mine of Xinjiang were acidized with hydrochloric acid. Based on an analysis of chemical composition and XRD of the samples, the authors studied chemical composition and contents of the acid soak-out substances as well as the structure characteristics of the samples treated with hydrochloric acid. The acid corrosion mechanism and the content variation tendency of the soak-out substances with the increase of hydrochloric acid concentration were also investigated. The results show that the acid soak-out ratios of CaO and Na2O are the highest, followed by K2O. The acid soak-out ratios of MgO, Fe2O3 and Al2O3 are relatively high, while the acid soak-out ratios of SiO2 are the lowest. The acid corrosion amounts of the samples with more vermiculite layers are relatively high. The acid-resistant property of the phlogopite-vermiculite interstratification mineral is not so good as phlogopite.

关 键 词：金云母-蛭石 间层矿物 酸浸取物 酸浸取率 

分 类 号：P578.963[天文地球—矿物学] P579[天文地球—地质学]