矿业科学学报2024，Vol.9Issue(1)：13-21,9.DOI:10.19606/j.cnki.jmst.2024.01.002
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
摘要
Abstract
In order to prevent major acid drainage pollution accidents,this study aims to improve the ac-curacy of acid production potential evaluation of mine rocks in the prediction of acid drainage.Specific-ally,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 se-quential extraction method,which is then compared with the traditional method of calculating the maxi-mum acid-producing potential by measuring total sulfur.Results show that:1)the acid-producing poten-tial 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 acid-producing 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 to-tal 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 evalu-ation 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Key words
acid production potential/sulfur mineral/coal gangue/three-step sequential extraction/acid mine drainage prediction分类
矿业与冶金引用本文复制引用
孙红福,阴祥诚,孙朗,赵峰华,朱孟浩,范紫仪..煤矸石精确产酸潜力评价方法对比研究[J].矿业科学学报,2024,9(1):13-21,9.基金项目
国家自然科学基金(40972110,41102096) （40972110,41102096）
大学生创新计划(202302034) （202302034）
