煤中碳酸盐矿物的测试技术和方法及测试数据的应用

Testing Techniques and Methods for Carbonate Minerals in Coal and Application of Tested Data

我国西北及华北侏罗纪煤系地层中含有较高的碳酸盐矿物,其形成与成煤地质时代、沉积环境密切相关。根据化学组成、性质以及成因等相关因素,可将分为碱土金属碳酸盐与过渡金属碳酸盐二类。目前测试煤中碳酸盐矿物的指标有4个,即:ICC指数、碳酸盐CO2总量、NP值、矿物相分析。结合煤田地质勘探工作中测试煤中碳酸盐矿物的需要,提出了定性分级、定量测试、和矿物相分析等3个级别的测试方案,并根据每个级别测试的目的、测试的样品种类,设计了相关指标的测试方案与测定方法。煤中碳酸盐矿物的相关指标数据可广泛应用于煤质评价、煤矿废水酸碱性预测、煤加工利用、煤岩层对比与成煤地质环境等地质研究工作。

Jurassic coal measures strata in Northwest China and North China contain a lot of carbonate minerals;their formation is closely related with coal-forming age and depositional environment.According to related factors of chemical composition,property and genesis can be divided into alkaline-earth metal carbonate and transition metal carbonate two categories.At present,4 items should be tested for carbonate minerals in coal,namely： ICC index,carbonate total CO2,NP value and mineral phase analysis.Combined with the needs of coal carbonate mineral tests in coal geological exploration,3 level test schemes of qualitative classification,quantitative test and mineral phase analysis have been put forward.According to the test purpose of each level and testing sample kind,have designed test schemes of related indices and testing methods.Related index data of carbonate minerals in coal can be used in geological researches of coal quality assessment,coalmine liquid waste alkalinity or acidity prediction,coal processing and utilization,coal and strata correlation and coal-forming geological environment.