火试金法测定铜冶炼物料中银补正系数研究

火试金法是分析化学中的一种经典的分析方法,对于熔炼和灰吹过程中产生的银损失,标准分析方法中采用二次试金或三次试金进行补正,虽然校正结果很好,但存在分析流程长、操作成本高、人为操作误差增加等问题.本文通过对铜冶炼中铜精矿、金精矿、粗铜、铜阳极泥等物料进行分类实验,统计分析了大量的实验数据,分别用一次试金法和二次试金法计算...

Study on determination of silver correction coefficient of copper smelting materials by fire assay

The fire assay is a classic analysis method in analytical chemistry.For the silver loss during the smelting and ash blowing process,the standard analysis method uses the second test or the third test to make corrections.Although the calibration results are very good,there are problems such as long analysis process,high operation cost,and increase of human operation error.In this paper,through the classification experiment of copper concentrate,gold concentrate,blister copper,copper anode slime and other materials in copper smelting,a large number of experimental data are statistically analyzed,and the primary and secondary testing methods are used to calculate the silver correction coefficient of each material,and get the following results.When the silver content is less than 200 g/t,the correction coefficient is 1.03;when the silver content is in the range of 200~500 g/t,the correction coefficient is 1.025;when the silver content is in the range of 500~1000 g/t,the correction coefficient is 1.02;when the silver content is greater than 1000 g/t,the correction coefficient is 1.01.The control experiment and the significance test prove that the result of this method is accurate and reliable.Compared with the traditional fire assay method,this method solves the problems of time-consuming and errors caused by the second test or third test,and achieves the effects of energy saving,consumption reduction and time saving.