CIESC Journal ›› 2019, Vol. 70 ›› Issue (7): 2684-2690.DOI: 10.11949/0438-1157.20190139

• Energy and environmental engineering • Previous Articles     Next Articles

Adsorption of cyanide by typical minerals of cyanide slag

Yubo TU1,2(),Peiwei HAN1,Lianqi WEI1,Xiaomeng ZHANG1,Yingchao DU1,2,Yongliang WANG1,Shufeng YE1()   

  1. 1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-02-21 Revised:2019-04-16 Online:2019-07-05 Published:2019-07-05
  • Contact: Shufeng YE

氰化渣典型矿物对氰的吸附

涂玉波1,2(),韩培伟1,魏连启1,仉小猛1,杜英超1,2,王永良1,叶树峰1()   

  1. 1. 中国科学院过程工程研究所,多相复杂系统国家重点实验室,北京100190
    2. 中国科学院大学,北京 100049
  • 通讯作者: 叶树峰
  • 作者简介:涂玉波(1975—),男,硕士,高级工程师,<email>tuyubo-1@163.com</email>

Abstract:

A large amount of cyanide slag is produced during the cyanidation and gold extraction process and is considered as a hazardous solid waste. Cyanide slag was mainly consisted of pyrite, quartz and silicate. The static adsorption method was applied to simulate the cyanide ion adsorption on several typical minerals and their complex minerals of cyanide tailing in this study. Results showed that the adsorption of CN- by minerals is linear, but the adsorption capacity is different, and the adsorption amount of CN- on unit mass could be classified as follows: pyrite > synthetic cyanide tailing>silicate mixture > quartz. Quartz had hardly any adsorption of CN-. The CN- adsorption capacity of silicate mixture, pyrite and synthetic cyanide slag were about 1.09, 13.89 and 6.89 mg/g, respectively. A mathematical model was developed to estimate the effects of quartz, silicate and pyrite on the CN- adsorption capacity of cyanide tailing. The Fourier transform infrared spectroscopy showed that a significant CN- adsorption peak appeared for silicate, pyrite and cyanide slag, and oxidation products of pyrite changed significantly after the adsorption of CN-.

Key words: cyanide ion, adsorption, cyanide slag, adsorption capacity, minerals

摘要:

氰化提金过程中产生大量的氰化渣,被视为是危险固体废物。氰化渣主要由黄铁矿、石英和硅酸盐等矿物组成。本实验采取静态吸附法,模拟了氰化渣中几种典型矿物及其复合矿物对氰的吸附。研究表明:矿物对氰的吸附呈线性特征,但吸附能力各不相同, 各矿物对氰的吸附量大小顺序是q黄铁矿>q模拟氰化渣>q硅酸盐矿>q石英;石英对氰几乎不产生吸附,黄铁矿、硅酸盐矿物混合物和模拟氰化渣对氰的饱和吸附量分别约为13.89、1.09和6.89 mg/g。开发了一种数学模型用来评估石英、硅酸盐矿物混合物和黄铁矿含量对氰化渣吸附氰总量的影响。红外分析表明,CN-吸附在矿物表面,改变了氧化产物,生成了新的物质,促进了矿物对CN-的吸附。

关键词: 氰离子, 吸附, 氰化渣, 吸附量, 矿物

CLC Number: