高砷铁含铅物料的固体废物属性鉴别
Solid waste identification of lead-containing material with high content of arsenic and iron
武素茹 1王兆瑞 1余淑媛 2朱锦波 1冯均利 2孙鑫1
作者信息
- 1. 天津海关化矿金属材料检测中心,天津 300456
- 2. 深圳海关工业品检测技术中心,广东深圳 518067
- 折叠
摘要
对一批As、Fe含量较高的申报品名为"铅矿"的样品,进行了固体废物属性鉴别分析.通过元素含量、物相组成、微观形貌、粒径分布及浸出液pH值等特征检测与分析,发现该样品主要物相为黄钾铁矾和臭葱石,主要元素组成为S、Fe、Si、As、Al、Ca等,Pb含量很低,与常见铅矿特征不符.通过对比几种组成相似的固体废物,对样品来源进行推断,排除了样品来源的几种可能性:传统湿法炼锌的黄钾铁矾渣、锌精矿氧压浸出渣、铅锌冶炼烟气净化砷渣、冶金废水矿化固砷的沉砷渣,最终推断样品可能为暴露在地表的铅锌矿选矿尾矿,经长时间氧化形成的以臭葱石和黄钾铁矾为主的废弃矿石,根据GB 34330-2017鉴别样品为固体废物.
Abstract
Solid wastes identification were conducted on a batch of samples declared as"lead ore"with high content of arsenic and iron.Through the feature detection and analysis including elemental content,phase composition,microtopography,particle size distribution and pH of leaching solution,it was found that the main phases of this sample were jarosite and scorodite.The main elements included S,Fe,Si,As,Al and Ca,while the content of Pb was low,which was not consistent with the characteristic of common lead ores.Several solid wastes with similar composition were compared to infer the sample source.Several pos-sibilities of sample source were excluded:jarosite slag in traditional zinc hydrometallurgy,oxygen pressure leaching slag of zinc concentrate,arsenic slag of flue gas cleaning in lead-zinc smelting,or arsenic deposi-tion slag of mineralized arsenic fixation of metallurgical waste water.Finally,it was inferred that the sam-ple was possible the lead-zinc ore tailings which was exposed to the earth's surface.The refused ore mainly containing scorodite and jarosite was formed after long-term oxidization.According to GB 34330-2017,the sample was identified as solid waste.
关键词
含铅物料/黄钾铁矾/臭葱石/砷/铁/固体废物鉴别Key words
lead-containing material/jarosite/scorodite/arsenic/iron/solid waste identification引用本文复制引用
出版年
2024
NETL
NSTL
万方数据