不可见金的赋存状态研究

EPMA STUDY OF OCCURRENCE OF ULTRAMICRO GOLD IN ORE

电子探针、扫描电镜和溶矿试验研究证明,在某地“卡林型”金矿中,黄铁矿是最主要的载金矿物。黄铁矿由先期形成的含Au和As很低的自形晶核心和后期形成的含Au和As很高的环边组成,其中Au和As呈正消长关系。因此,根据As的分布情况即可研究和认识Au的分布规律。研究结果为改善矿石的氧化焙烧、氯化处理和氰化浸出工艺设计提供了科学依据。

EPMA, SEM and chemical dissolving tests have shown that in the certain Carlin-type gold deposits in Guizhou Province, China pyrite is the main goldbearing mineral composed of early euhedral core containing a small amount of gold and arsenic and late peripheral rim high in gold and arsenic, in which a positive correlation is noticed between gold and arsenic. Therefore, the study of the distribution of arsenic may shed light on the distribution of gold in the pyrite. This study provides scientific information on the improvements on the oxidlzing-roasting, chloridizing and cyanide-leaching processes of ores.