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目前,国内外湿法测定矿石中金的富集和分离方法很多。应用离子交换树脂富集金也有一些报道,但应用离子交换树脂富集高铁矿石中低品位金、火焰原子吸收法测定至今仍未见到报道。本文拟定了用717阴离子交换树脂直搔放入含金的王水矿浆中进行交换富集,然后根据树脂与不溶残渣粒度的显著差异,在尼龙网上分离,以硫脲溶液解脱,火焰原子吸收测定金的方法。本法手续简便,易掌握,成本低,在大量铁存在下无干扰。本法测定矿石含金量范围较大,结果稳定。检出极限0.04克/吨,精密度2％～6％。
At present, there are many methods of gold enrichment and separation in the determination of ores by wet method both at home and abroad. There are some reports about ion exchange resin enrichment gold. However, ion exchange resins are used to enrich low-grade gold in high-iron ore. Flame atomic absorption spectrometry has not yet been reported. In this paper, 717 anion exchange resin was directly scratched into gold-containing aqua regia slurry for exchange enrichment, and then based on the resin and insoluble residue size significantly different, separated on nylon mesh, with thiourea solution liberation, flame atomic absorption spectrometry Golden method. This procedure is simple, easy to grasp, low cost, in the presence of large amounts of iron without interference. The method of determination of a large range of gold content of ore, the result is stable. Detection limit of 0.04 grams / ton, precision 2% to 6%.