火试金法测定铜精矿中低品位金含量-分金时长的探讨

Determination of Low-grade Gold Content in Copper Concentrates by Fire Assay Method-discussion on the Time for Separating Gold

本文依据单一变量法对分金的时长进行研究,探讨合适的分金时长,提高金的准确率。当合粒在2000μg左右、金含量20μg左右时,稀酸反应时间不能少于30 min,浓酸的分金时间在35~40 min时金回收率101.0%,能够满足贸易结算需要。

Based on the single variable method,this article researches the time of distributing gold,discussing the appropriate length of distributing gold,and improving the accuracy of gold.When the combined granule is about 2000 micrograms and the gold content is about 20 micrograms,the reaction time of dilute acid should not be less than 30 min,and the gold recovery rate of concentrated acid is 101.0%when the gold separation time is 35~40 min,which can meet the needs of trade settlement.