砂金矿的选别
实践证明，重选法是处理砂金矿最有效，最经济的方法，由于砂金矿中金的粒度组成不同，各种重选设备处理物料的有效粒度界限也不同，所以合理的砂金矿选别流程应是几种重选设备的联合作业。
粗选段得出的含金精矿，金品位100克/吨。重砂矿物躲在1～2千克/吨，对于含金粗精矿的处理目前有三种方法：
1、用人工淘金盘淘洗出金粒后重砂丢弃；
2、用混工筒进行内混汞，获得汞膏后重砂丢弃；
3、用人工淘洗或混汞提取金以后，重砂集中送精选厂处理，用磁选，电选等方法分别回收各种重砂矿物。
砂金矿选金的回收率：两段溜槽选别为70%～74%，溜槽粗选，跳汰机扫选，摇床精选流程为85%～90%。
Selection of sand and gold deposits
Practice has proved that the gravity method is the most effective treatment of sand gold, the most economical method, because the composition of gold deposits in different size sand, grain boundaries between various effective gravity equipment handling of materials is also different, so the sand gold rational flowsheet should be combined with the gravity equipment industry for several.
Gold concentrate roughing the gold grade of 100 g / T. Heavy mineral hide in 1 ~ 2 kg / ton, for the treatment of gold concentrate crude currently has three kinds of methods:
1, using artificial disc gold panning out gold particles after heavy drop;
2, mixed industry amalgamation cylinder, obtain the amalgam after heavy drop;
3, after washing with artificial or extraction of gold amalgamation, heavy central supply concentrator treated by magnetic separation, electrostatic separation method respectively, recycling all kinds of heavy minerals.
The recovery rate of gold placer gold deposit: two chute sortingfine ranged from 70% to 74%, chute roughing, scavenging jig, shaker selection process is 85% ~ 90%.
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