煤矸石精确产酸潜力评价方法对比研究  

Comparative study on evaluation methods of accurate acid production potential of coal gangue

作　　者：孙红福[1] 阴祥诚 孙朗 赵峰华[1] 朱孟浩 范紫仪 SUN Hongfu;YIN Xiangcheng;SUN Lang;ZHAO Fenghua;ZHU Menghao;FAN Ziyi(College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《矿业科学学报》2024年第1期13-21,共9页Journal of Mining Science and Technology

基　　金：国家自然科学基金(40972110,41102096);大学生创新计划(202302034)。

摘　　要：为有效避免重大酸性水污染事故,需提高矿山岩石产酸潜力评价的精度。通过全面阐述矸石中常见含硫矿物的产酸潜力计算方法,采用三步连续提取法测定了多个矿石和煤矸石中产酸矿物的硫含量,对比分析了精确产酸潜力和最大产酸潜力。结果表明:煤矸石的产酸潜力值取决于各产酸硫的质量分数和单位硫产酸值;对大部分样品,用产酸硫含量计算的产酸潜力值不同程度地低于用全硫预测的产酸潜力值;样品SC中的硫成分主要为砷黄铁矿硫,相比黄铁矿的单位硫产酸值更高,导致SC样品计算的精确产酸潜力相比全硫预测的产酸潜力更高;三步连续提取法适用于以铁和铜的硫化物为主要含硫矿物的煤矸石;当矿石中其他硫化物成分增多和空白样品混合不均匀都会对结果产生一定干扰。研究结果为准确评价矿区煤矸石精确产酸潜力提供了依据。In order to prevent major acid drainage pollution accidents,this study aims to improve the accuracy of acid production potential evaluation of mine rocks in the prediction of acid drainage.Specifically,this paper introduced existing calculation methods of acid-producing potential,and then determined the acid-producing mineral contents in some sulfur minerals and coal gangue samples by three-step sequential extraction method,which is then compared with the traditional method of calculating the maximum acid-producing potential by measuring total sulfur.Results show that:1)the acid-producing potential of coal gangue is dependent on the mass percentage content of each acid-producing sulfur and the corresponding unit acid value;2)except for sample SC,the acid-producing potential calculated by acidproducing sulfur content is lower than(with different degrees)the acid-producing potential predicted by total sulfur.The sulfur in the sample SC is mainly arsenopyrite sulfur,which has a higher acid value per unit than pyrite sulfur,resulting in a higher acid potential calculated by SC sample than predicted by total sulfur;3)the three-step sequential extraction is suitable for samples with iron and copper sulfides as the main sulfur minerals;4)when other sulfide components increase and blank samples are unevenly mixed,the results will be disturbed to some extent.This research provides evidences to justify the evaluation of accurate acid production potential of coal gangue in mining area.

关 键 词：产酸潜力 含硫矿物 煤矸石 三步连续提取法 酸性水预测 

分 类 号：TD74[矿业工程—矿井通风与安全]