黄铁矿中金的性状及其利用

黄铁矿是金的主要载体矿物,金在黄铁矿中的分布是不均匀的,其金的含量高低相差可达数十倍。对金矿床本身而言,一般细粒级、破碎的黄铁矿含金量高。对黄铁矿本身而言,结晶形态不同的黄铁矿其含金量也相差很大。黄铁矿中金主要是以自然金的形式赋存于其中,其产出形态受到矿物本身结构构造控制多呈片状、脉状、无规则状。扫描电镜分析结果表明,在可见金及显微金周围容易发现次显微金。为了提高金的回收率,应特别注意对细粒级黄铁矿中金的回收和利用。

OCCURRENCE STATE OF GOLD IN PYRITE AND ITS UTILIZATION

Pyrite is the main host mineral of gold, and gold in pyrite is far from well distributed. Gold contents in pyrite may vary as highly as ten times. As far as a gold deposit is concerned, generally the finely grained, more heavily crushed pyrite has a higher gold content. As an individual pyrite is concerned, differently shapped crystals of pyrite show different gold contents that vary in a wide range. It is mainly in the form of natural gold particles that gold is present in pyrite. Depending on the texture and structure of the host mineral, gold in pyrite may be sheet, vein and irregulaly shapped. Around the visible gold and microscopic gold particles submicroscopic gold can usually be found under a SEM. In order to increase the recovery of gold, special attention should be paid to the utilization and recovery of gold in finely grainded pyrite.