选择性絮凝-磁选回收镍冶金渣中的磁铁矿

来源期刊：中南大学学报(自然科学版)2006年第4期

论文作者：郭宇峰 董海刚 姜涛 李光辉 黄柱成 杨永斌 张小雨 张国范

文章页码：680 - 684

关键词：镍冶金渣;微细粒矿物;磁铁精矿;选择性絮凝;磁选

Key words：nickel metallurgical residue; fine particle mineral; magnetite concentrate; selective flocculation; magnetic separation

摘    要：对某镍冶金渣(铁含量接近50%)进行工艺矿物学及选择性絮凝-磁选研究。工艺矿物学研究结果表明:该渣中主要含铁矿物(磁铁矿)的嵌布粒度细小,且部分以微细包裹体形态分布于成分复杂的铁质玻璃体中,采用常规磁选工艺无法有效回收。选择性絮凝-磁选结果表明:在油酸用量为0.8 kg/t、碳酸钠用量为2 kg/t及磁感应强度为0.20 T的条件下,可获得铁品位为56.68%,回收率为81.72%的磁铁精矿。与常规磁选工艺相比,磁铁精矿品位提高3%,回收率提高5%。

Abstract: Mineralogy and selective flocculation-magnetic separation of a nickel metallurgical residue (TFe about 50%) were studied. The results of mineralogy show that the main ferrous mineral is fine magnetite, which exists in ferruginous glass partly as inclusion texture. The results of selective flocculation-magnetic separation show that magnetite concentrate with 56.68% grade and 81.72% recovery was obtained by flocculation-magnetic separation under conditions of oleic acid dosage 0.8 kg/t, sodium carbonate dosage 2 kg/t and magnetic intensity 0.20 T. Compared to conventional magnetic separation, the selective flocculation-magnetic separation increases the magnetite grade and recovery by 3% and 5%, respectively.