期刊论文

Study of Tailings Acidification and Its Influence on Shear Strength of Tailings

中文

南华大学学报(自然科学版)

1673-0062

2017

31

1

11-16+27

10.19431/j.cnki.1673-0062.2017.01.003

(2012-355):国家安监总局安全生产重大事故防治关键技术科技项目 (CX2016B448):湖南省研究生科研创新项目

本校为第一机构

为揭示尾矿酸化本质及其对尾矿砂抗剪强度的影响,开展了动态浸渍试验.从湖南省某铅锌矿采取了尾矿砂试样,采取加入双氧水的方式促使尾矿砂中的硫化物(主要为黄铁矿)发生氧化产酸.在浸泡试验的基础上开展了MLA(矿物解离分析仪)矿物成分分析、颗粒分析、抗剪强度等一系列实验.试验结果表明:尾矿矿物成分中随着黄铁矿氧化程度的增加,黄铁矿含量减少、碱性物质(方解石、白云母)减少、砂粒(粗粒)含量减少、粉粒(细粒)含量增加、粘聚力C增大、摩察角φ减小、尾矿砂土抗剪强度降低.

In order to reveal the effect of tailing acidification and its effect on the shear strength of tailings, the soaking test was carried out. The tailings sand samples were taken from a lead-zinc mine in Hunan Province, and the addition of hydrogen peroxide was used to promote the oxidation of sulfide （ mainly pyrite） in tailings and produce acid.On the ba- sis of the soaking test, a series of experiments on MLA（ mineral liberation analyser）mineral composition analysis, particle analysis and shear strength were carried out.The resuhs show that...