摘要
以铁含量为35%的氰渣为研究对象,研究了焙烧温度、焙烧时间及碳氧比对煤基磁化焙烧过程的影响,并采用化学分析、XRD、SEM、热重分析等分析手段对含铁氧化物的转变过程进行表征。随着焙烧温度的提高,铁氧化物的物相转变过程为Fe_(2)O_(3)→Fe_(3)O_(4)→FeO。随着磁化焙烧焙烧时间的延长,尾渣中的Fe_(2)O_(3)首先被C还原为Fe_(3)O_(4),还原得到的Fe_(3)O_(4)可被空气中的O 2重新氧化为Fe_(2)O_(3)。碳氧比较低时,磁化率接近2.33;当碳氧比超过3时,过量的煤与尾渣混合,Fe_(2)O_(3)还原反应不完全;在焙烧温度645℃、焙烧时间45 min、碳氧比3的优化焙烧条件下,得到焙烧矿的磁化率为2.34。
Effects of roasting temperature,roasting time and ratio of carbon to oxygen on roasting process of coal-based magnetization were investigated,and the transformation process of iron-containing oxides was characterized by chemical analysis,XRD,SEM and thermogravimetric analysis.With the increase of roasting temperature,the transformation process of physical phase of iron-containing oxides is Fe_(2)O_(3)→Fe_(3)O_(4)→FeO.With the extension of roasting time of magnetization roasting,Fe_(2)O_(3)in the tailings is first reduced to Fe_(3)O_(4)by carbon,and the reduced Fe_(3)O_(4)can be re-oxidized to Fe_(2)O_(3)by oxygen in air.Under low ratio of carbon to oxygen conditions,the magnetization rate is close to 2.33.When the ratio of carbon to oxygen exceeds 3,the excess coal is mixed with the tailings,and resulting the incomplete reduction of Fe_(2)O_(3).The magnetization rate of roasted ore is 2.34 under the optimum roasting conditions including roasting temperature of 645℃,roasting time of 45 min,and ratio of carbon to oxygen of 3.
作者
衡振平
谢锋
孙留根
韩路洋
董凯伟
白云龙
HENG Zheng-ping;XIE Feng;SUN Liu-gen;HAN Lu-yang;DONG Kai-wei;BAI Yun-long(Zhengzhou Jinquan Mining and Metallurgical Equipment Co.,Ltd.,Zhengzhou 450000,China;School of Metallurgy,Northeastern University,Shenyang 110819,China;BGRIMM Technology Group,Beijing 100160,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2023年第3期39-46,共8页
Nonferrous Metals（Extractive Metallurgy)
基金
中央高校基本科研业务费资助项目(N182506003)。
关键词
含铁氰渣
磁化焙烧
磁选
铁精矿
ferrous cyanide residue
magnetic roasting
magnetic separation
iron concentrate
作者简介
衡振平(1972-),男,工程师;通信作者:谢锋(1970-),男,博士,教授。
