矿产资源高效综合利用是目前全球矿业发展的主要方向。传统的光学显微镜和扫描电镜等技术在查明许多低品位矿石的元素赋存状态等方面具有局限性,且无法提供定量化的矿物学信息,制约了对这些金属矿石选矿工艺的提升。近年来,基于扫描电镜...矿产资源高效综合利用是目前全球矿业发展的主要方向。传统的光学显微镜和扫描电镜等技术在查明许多低品位矿石的元素赋存状态等方面具有局限性,且无法提供定量化的矿物学信息,制约了对这些金属矿石选矿工艺的提升。近年来,基于扫描电镜和X射线能谱仪的矿物自动定量分析系统越来越多地应用到复杂矿石和工艺矿物学的研究中。为了进一步丰富和拓展该类系统在工艺矿物学领域的应用研究,本文利用矿物自动定量分析系统TIMA(TESCAN Integrated Mineral Analyzer)对中国某矿山低品位铜矿渣样品进行矿物学测试分析,展示其在提取多种工艺矿物学参数研究中的具体应用。分析结果表明:该铜矿渣中铜元素含量(0.08%)很低,主要赋存在黄铜矿中,该矿物含量为0.21%;脉石矿物含有大量石英(47.46%)、白云母(10.10%)和方解石(9.88%)等;黄铜矿连生关系复杂,主要以连生体形式呈不规则粒状零散分布在石英和方解石等脉石矿物中,粒度小且分布极不均匀,其中11~76μm颗粒占比较大;解离度低于30%的黄铜矿颗粒质量占全部的85%左右,整体解离度较低,因而需要进一步磨矿来提升黄铜矿回收率。以上研究表明,对于有用矿物含量低、粒度细小且嵌布关系复杂的矿石样品,包括TIMA在内的矿物分析系统能够提供快速、定量、全面且准确的工艺矿物学参数信息,有利于优化选冶流程,在提高矿产资源的综合利用方面具有非常广阔的应用前景。展开更多
This paper presents a methodology for studying low grade lateritic nickel ore, which usually presents complex mineralogy, with widespread nickel in several mineral phases. The study is focused on determining the miner...This paper presents a methodology for studying low grade lateritic nickel ore, which usually presents complex mineralogy, with widespread nickel in several mineral phases. The study is focused on determining the mineralogy and the distribution of nickel in the bearing minerals. Laboratory assays comprise homogenization, sampling and particle size analysis. Chemical analyses by X-ray fluorescence are performed in all fractions sizes, while mineralogical assessments by X-ray diffraction are carried out for head sample. The mineralogical composition of the samples and the partition of main elements in the bearing minerals are assayed by size fraction through automated image analysis software (MLA) coupled to a scanning electron microscope (SEM). The chemical compositions of the several minerals identified in MLA are determined during systematic observations on SEM with energy dispersive spectrometer (EDS).展开更多
文摘矿产资源高效综合利用是目前全球矿业发展的主要方向。传统的光学显微镜和扫描电镜等技术在查明许多低品位矿石的元素赋存状态等方面具有局限性,且无法提供定量化的矿物学信息,制约了对这些金属矿石选矿工艺的提升。近年来,基于扫描电镜和X射线能谱仪的矿物自动定量分析系统越来越多地应用到复杂矿石和工艺矿物学的研究中。为了进一步丰富和拓展该类系统在工艺矿物学领域的应用研究,本文利用矿物自动定量分析系统TIMA(TESCAN Integrated Mineral Analyzer)对中国某矿山低品位铜矿渣样品进行矿物学测试分析,展示其在提取多种工艺矿物学参数研究中的具体应用。分析结果表明:该铜矿渣中铜元素含量(0.08%)很低,主要赋存在黄铜矿中,该矿物含量为0.21%;脉石矿物含有大量石英(47.46%)、白云母(10.10%)和方解石(9.88%)等;黄铜矿连生关系复杂,主要以连生体形式呈不规则粒状零散分布在石英和方解石等脉石矿物中,粒度小且分布极不均匀,其中11~76μm颗粒占比较大;解离度低于30%的黄铜矿颗粒质量占全部的85%左右,整体解离度较低,因而需要进一步磨矿来提升黄铜矿回收率。以上研究表明,对于有用矿物含量低、粒度细小且嵌布关系复杂的矿石样品,包括TIMA在内的矿物分析系统能够提供快速、定量、全面且准确的工艺矿物学参数信息,有利于优化选冶流程,在提高矿产资源的综合利用方面具有非常广阔的应用前景。
文摘This paper presents a methodology for studying low grade lateritic nickel ore, which usually presents complex mineralogy, with widespread nickel in several mineral phases. The study is focused on determining the mineralogy and the distribution of nickel in the bearing minerals. Laboratory assays comprise homogenization, sampling and particle size analysis. Chemical analyses by X-ray fluorescence are performed in all fractions sizes, while mineralogical assessments by X-ray diffraction are carried out for head sample. The mineralogical composition of the samples and the partition of main elements in the bearing minerals are assayed by size fraction through automated image analysis software (MLA) coupled to a scanning electron microscope (SEM). The chemical compositions of the several minerals identified in MLA are determined during systematic observations on SEM with energy dispersive spectrometer (EDS).
