自然铜矿石样品的加工及分析测试方法

对滇东北地区典型自然铜矿石样品的试验采取、粒度分级过筛、缩分及均匀性试验,认为样品在经过粗碎、中碎后,将颗粒大于2mm的矿物(95%以上为自然铜)用2mm隔筛分离后,余下样品经过棒磨,过0.246mm(60目)筛后进行缩分至常量细碎样品量,再进行0.074mm(200目)样品加工的工艺流程是可行的。样品中铜元素分析方法(原子吸收光谱法、碘量法和碘氟法)的选择符合矿区实际,其经济性、可靠性、准确性能满足地质工作的实际需要。

Processing and Analysis of Native Copper Ore Samples

Through the experiments of sampling,size-grading,screening,splitting and homogeneity test for the native copper ore samples from northeast Yunnan province,a sample processing procedure was established.After rough and medium crushing and screening out the grains with grain size 2 mm screen(>95% is native copper),the sample was rod grinded,passing through 0.246 mm(60 mesh) screen,splitting and prepared to 0.074 mm(200 mesh).Atomic absorption spectrometry,iodimetry and iodine-fluorine methods were selected for copper analysis with good accuracy,reliability and economical efficiency.