摘要
根据铜渣的物相分析和铁橄榄石的氧化原理,提出了铜渣在中低温下氧化改性的实验方法,考察了氧气流量、氧化温度、氧化时间等因素对铜渣物相变化的影响。实验结果表明:随着氧化温度的升高和氧化时间的延长,铁橄榄石逐渐消失,转化为Fe_3O_4和少量Fe_2O_3,且物相粒度趋向均匀;粒度35～50μm级铜渣在氧化温度800℃、氧气流量0.1 L/min、氧化时间60 min条件下,Fe_3O_4的面积分数可达43.39%,氧化效果最佳。该实验为后续改进磁选效果、提高铜渣中铁资源的回收利用率奠定了基础。
According to the mineralogical analysis of copper slag and the oxidation mechanism of fayalite, the experimental method of oxidation modification of copper slag at middle-low temperature was suggested. The impact factors on mineralogical changes of copper slag like oxygen flow, oxidation temperature and oxidation time, etc. were investigated. The results showed that as the increasing of oxidation temperature and oxidation time, the fayalite transformed into Fe304 and a small amount of Fe203 gradually, and the mineral particle size tended to be uniform. The optimal oxidation result was obtained for copper slag with particle size of 35- 50μm under the conditions of oxidation temperature of 800℃, oxidation flow of 0.1L/min and oxidation time of 60min, the area fraction of Fe304 reached 43.39%. The study lays a foundation for the further improvement of magnetic separation effect and increase of recovery of iron resources in copper slag.
出处
《中国有色冶金》
CAS
2012年第2期74-78,共5页
China Nonferrous Metallurgy
关键词
铜渣
铁橄榄石
中低温
氧化改性
磁铁矿
copper slag
fayalite
middle-low temperature
oxidation modification
magnetite
