QDTA／T／EGD／GC在线联用技术Ⅺ．黄铁矿、菱铁矿、高岭石、白云石、方解石、石英六元混合矿物的热行为考察及组成分析

摘要: 应用ＤＴＡ／Ｔ／ＥＧＤ／ＧＣ在线联用技术，在空气下鉴定了白云石中的微量黄铁矿；在ＣＯ＿２、Ｎ＿２、空气和空气／ＣＯ＿２（１：１）混合气下分别对配合的黄铁矿、菱铁矿、高岭石、白云石、方解石、石英六元混合矿物的热行为进行了考察。在上述实验基础上，以空气／ＣＯ＿２（１：１）混合气下测得的ＤＦＡ／ＧＣ联用曲线所提供的信息为依据，对六元混合矿物的组成逐一加以鉴定，取得了可信的实验结果。

Abstract: By applying DTA/T/EGD/GC on-line coupled simultaneous technique and rel-evant equipments,the trace pyrite in the dolomite was identified in air.The thermal behaviorsof the proportional six-component mixed minerals-pyrite,siderite,kaolinite,dolomite,cal-cite and quartz in various gas atmospheres such as CO_2,N_2,air and air/CO_2(1:1)mixed gashave been investigated seperately. Based on thc above experimental results ,the informationsupplied by DTA/GC curves in air /CO_2(1 :1)mixed gas,the composition of six-componentmixed minerals can be distinguished one by one from DTA/GC curves and the reliable results werw obtained.