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粗铜中金银的测定,多采用化学分离大量铜后,再以试金法进行测定(简称湿干合法).该法分析流程长,操作繁琐,不适于生产的需要.本文拟定了加入过量氧化铅,在低硅酸度下,使大量铜造渣,残留于铅扣中的少量钢对灰吹无影响,实现了不经分离直接火试金法测定.结果表明本法比温干合法简便、快速,准确度高,用于我厂粗铜分析取得了较好的效果.一、氧化铅加入量及硅酸度试验在加入氧化铅量为铜量的20至30倍,硅酸度为0.5～1.5时铅扣中含铜量如图1和图2.
Blister copper in the determination of gold and more use of chemical separation of a large number of copper, and then the gold assay (hereinafter referred to as wet and dry method). The analysis of long processes, cumbersome operation, not suitable for production needs.This paper developed by adding excess Lead oxide, under low silicic acid, make a large amount of copper slag, a small amount of steel left in the lead buckle had no effect on the ash blown, achieved without the direct fire test gold separation method.The results show that the method is more convenient than the warm dry method, Fast, high accuracy, for our factory crude copper analysis has achieved good results.A lead oxide addition and silicic acid test in the amount of lead oxide added to the amount of copper 20 to 30 times, silicic acidity of 0.5 to 1.5 When the lead buckle copper content shown in Figure 1 and Figure 2.