一种新型药剂方案浮选分离黄铁矿和铜金硫化矿的案例研究:第一性原理计算的视角
A case study of the separation of copper-gold sulfide ore from pyrite using a novel flotation reagent scheme:Insight from first-principles calculations
罗远家 1孙伟 1欧乐明 1韩海生 1江锋 1Stephen POOLEY 1陈建华 2彭建1
作者信息
- 1. School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China
- 2. School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China
- 折叠
摘要
由于石灰的大量使用容易导致堵管、环境污染、贵金属回收困难等问题,以石灰(CaO)为抑制剂、黄药(如丁基黄药钠)(BX)为捕收剂的传统方案的使用越来越受到限制,无石灰浮选工艺越来越被提倡.本研究创新性地提出了以Z200为捕收剂、焦没食子酸(PGA)为抑制剂的新工艺,并应用于湖北某铜金硫化矿与黄铁矿的分离.在实验室试验中,该试剂方案得到了比常规浮选工艺更好的铜金硫化矿与黄铁矿分离指标.利用基于密度泛函理论(DFT)的第一性原理计算进一步研究新药剂方案分离机理.DFT模拟结果表明,PGA对黄铁矿的抑制作用比黄铜矿强,而Z200对黄铜矿的捕收能力比黄铁矿强,这在分子水平上解释了新药剂方案的效果.这一新型环保药剂方案在矿产资源利用中具有很大的应用潜力.
Abstract
Due to many problems such as pipe blockage,environmental pollution,and the difficulty of recovering precious metals,caused by extensive use of lime,the conventional program using lime(CaO)as the inhibitor and xanthates(e.g.,sodium butylxanthate)(BX)as the collector has become increasingly restricted in use,and lime-free flotation processes are increasingly advocated.In this study,a novel process with Z200 as the collector and pyrogallic acid(PGA)as the inhibitor was innovatively proposed and applied to separate copper-gold sulfide ore and pyrite in Hubei Province,China.In laboratory experiments,this new reagent system achieved a substantially better separation of copper-gold sulfide ore and pyrite than the conventional process program.First-principles calculations based on density functional theory(DFT)were used to understand the separation mechanism of the new reagent scheme.The DFT simulations showed that PGA had a much stronger depression effect on pyrite than chalcopyrite,whereas Z200 exhibited a stronger collecting ability for chalcopyrite than pyrite,which together explains the effectiveness of the new reagent system at the molecular level.This work sheds some new light on the potential of adopting new and eco-friendly reagent schemes in the utilization of mineral resources.
关键词
新工艺/铜金硫化矿/黄铁矿/分离/DFT模拟Key words
novel process/copper-gold sulfide ore/pyrite/separation/DFT simulations引用本文复制引用
基金项目
National Key R&D Program of China(2022YFC2904502)
National Key R&D Program of China(2022YFC2904501)
Hunan Hightech Industry Technology Innovation Leading Plan,China(2022GK4056)
High Performance Computing Center of Central South University()
出版年
2023
NETL
NSTL
维普
万方数据