火试金法测定多金属复杂铜阳极泥中金

铜阳极泥中因含有大量金、银、铂、钯等贵金属而具有较高回收价值,其中金是价值最高的元素,金的精准检测对其综合回收具有重要指导意义。由于生产铜阳极泥的阳极板成分、生产指标控制、设备设施水平等因素的不同,导致其主要成分及含量均有较大差异,实验针对代表性的多金属复杂铜阳极泥,考察了多因素对火试金检测结果的影响。在硅酸度K=1.8、铅扣质量为35 g、氧化铅过量系数为1.8、熔炼温度为1100℃、熔炼升温时间和保温时间均为30 min时,加标回收率在99.4%~101%,RSD为0.15%~0.29%。优化条件下可实现多金属复杂铜阳极泥中金的精准检测。

Accurate Detection of Gold in Complex Multi-metal Copper Anode Slime by Lead Fire Assay

Copper anode slime contains a large amount of precious metals such as gold,silver,platinum,palladium and so on,which has high recovery value.Gold is the main valuable element in the anode slime,therefore,accurate detection of gold in copper anode slime has important guiding significance for its comprehensive recovery.Due to the different conditions of anode composition,production index control,equipment and facility level,etc.,the main compositions of copper anode slimes are quite different.In this study,the influences of multiple factors on the results of lead fire assay were investigated for the representative complex multi-metal copper anode slime.When silicic-acidity(K)is 1.8,lead quality is 35 g,excess coefficient of lead oxide is 1.8,melting temperature is 1100℃,and heating time and holding time both are 30 min,the standard recovery was 99.4%-101%,RSD were 0.15%-0.29%.The accurate detection of gold in complex copper anode slime can be achieved under the optimal experimental conditions.