鲕状赤铁矿“磁化焙烧-晶粒长大-磁选”新工艺研究  

Magnetizing Roasting-grain Growth-magnetic Separation Process for Oolitic Hematite Ore Dressing

作　　者：张亚辉[1] 张家[1] 张艳娇[2] 李洪潮[2] 赵平[2] 

机构地区：[1]武汉理工大学资源与环境工程学院,武汉430070 [2]中国地质科学院郑州矿产综合利用研究所,郑州450006

出　　处：《武汉理工大学学报》2013年第3期116-119,共4页Journal of Wuhan University of Technology

基　　金：国家"十二五"项目(1212011120303)

摘　　要：基于宣龙式鲕状赤铁矿嵌布粒度极细、结构复杂等特点,进行了磁化焙烧-晶粒长大-磁选新工艺研究。在焙烧温度为800℃,煤粉配比10%,焙烧时间45min的条件下,使赤铁矿还原焙烧成磁铁矿,经过弱磁选,可得到铁精矿品位62.5%,回收率85.5%的良好选矿技术指标。通过一系列观测手段及相关理论说明,证实了磁铁矿晶粒能够长大。Based on the characteristics of fine dissemination and complex mineral composition of Xuanlong oolitic hem- atite ore, a magnetic roasting-grain growth-magnetic separation process has been investigated. With the roasting tempera- ture of 800 ℃, roasting time of 45 min and coal to ore ratio of 10%, hematite transforms into magnetite through reduc- tion roasting. After low intensity magnetic separation, iron concentrate with iron content of 62.5% Fe and iron recovery of 85.5% could been obtained. Through a series of observation method and related theory, the grain growth of magnetite can be confirmed.

关 键 词：鲕状赤铁矿 磁化焙烧 晶粒长大 弱磁选 

分 类 号：TD95[矿业工程—选矿]