火试金富集在电感耦合等离子体原子发射光谱法测定镍矿石中金铂钯中的应用  

Application of fire assay enrichment in determination of gold,platinum and palladium in nickel ores by inductively coupled plasma atomic emission spectrometry

作　　者：喻生洁[1] 杨红玉[1] 吕庆成[1] 何云祥 谢阳 宋翔 YU Shengjie;YANG Hongyu;LÜQingcheng;HE Yunxiang;XIE Yang;SONG Xiang(Jinchuan Group Co.,Ltd.,Jinchang 737100,China)

机构地区：[1]金川集团股份有限公司,甘肃金昌737100

出　　处：《冶金分析》2024年第2期55-59,共5页Metallurgical Analysis

摘　　要：镍矿石的主要成分为镍、铜、铁、硫,其中硫含量(质量分数,下同)在20%~37%之间,较高的硫含量对铅试金分离富集效果影响较大。为了得到合适的铅扣,本文通过实验,选择合适的火试金配料比,以硝酸银做保护剂,减少灰吹时金、铂、钯的损失,将得到的合粒溶解后使用电感耦合等离子体原子发射光谱法(ICP-AES)测定金、铂、钯含量。按照实验方法测定镍矿石中金、铂、钯,测定结果的相对标准偏差(RSD,n=11)分别为4.1%~10.6%,2.7%~6.5%,1.9%~8.0%;金、铂、钯的加标回收率分别为97%~100%、99%~103%、98%~103%。方法有效解决了针对不同硫含量镍矿石的铅试金配料问题和将得到的试金合粒进行溶解后直接测定金、铂、钯的问题。The main components of nickel ore are nickel,copper,iron and sulfur.Where in the content of sulfur is in range of 20%-37%,and such a relatively high content has great influence on the lead fire assay separation and enrichment results.In order to obtain the proper lead button,the appropriate ratio of fire assay ingredients was selected in experiments.Silver nitrate was used as protective agent to reduce the loss of gold,platinum and palladium during cupellation.The obtained composite particle was dissolved,and the contents of gold,platinum and palladium were determined by inductively coupled plasma atomic emission spectrometry(ICP-AES).The contents of gold,platinum and palladium in nickel ore were determined according to the experimental method,and the relative standard deviations(RSD,n=11)of measurement results were 4.1%-10.6%,2.7%-6.5%and 1.9%-8.0%,respectively.The spiked recoveries of gold,platinum and palladium were 97%-100%,99%-103%,and 98%-103%,respectively.The proposed method effectively solved the lead fire assay ingredient for nickel ore with various sulfur contents.The contents of gold,platinum and palladium could be directly determined after dissolving the obtained composite particle.

关 键 词：铅试金 电感耦合等离子体原子发射光谱法(ICP-AES) 镍矿石 贵金属 金 铂 钯 

分 类 号：O657.31[理学—分析化学] TF031[理学—化学] TF041[冶金工程—冶金物理化学]