摘要
本文研究焙烧过程中黄金洞难浸金矿发生的矿物学变化，并推测浸金残渣中金残留的原因．通过实验和推测分析，得知焙砂的结构和组成对浸金有很大的影响．疏松多孔的结构有利于浸金．在焙烧过程中，最好能使黄铁矿和砷黄铁矿通过中间生成磁黄铁矿阶段，以利于亚微金粒的聚结长大．焙砂中砷、硫含量高，浸金率低．残渣含金与焙砂中砷的含量有很密切的关系．浸出残渣中的金主要以自然金存在，物理包裹在焙砂颗粒内致密氧化铁孔隙壁和氧化铁膜中，另外脉石中包裹有矿物，矿物中夹杂着脉石均有可能使残渣中残留金．
The mineralogical. change of Huang Jin Dong refractory gold concentrate in the roasting Process wasstudied in this paper and the reasons of gold remaining in the residue were analyzed. The experimental resultsand supposition showed that the structure and composition of calcine had a great effect on the gold leachingrate. Porous structure is of benefit to the leaching of gold. Pyrrhotite as an intermediate phase in theoxidation process of pyrite and arsenopyrite is of benefit to the submicron gold particles to borne gathering.If the arsenic and sulphur content in the calcine is high the gold leaching rate will be low. The arsenic con- tent of the calcine has a strong influence on the eventUal recovery rate of gold by cyanidation. Gold exists inthe residue in the form of nature and is covered in the dense hematite particles,Moreover the ores being cov-ered in gangue lead gold particles remaining in the residue.
出处
《有色金属》
CSCD
1999年第2期52-56,共5页
Nonferrous Metals
