高压辊磨预处理磁铁精矿制备氧化球团

研究了磁铁精矿高压辊磨预处理对生球性能、球团预热及焙烧性能的影响。研究表明:磁铁精矿高压辊磨预处理可显著改善原料的造球性能和球团品位,有效提高生球落下强度和抗压强度,但对预热球和焙烧球抗压强度提高作用不明显。高压辊磨预处理后,微细颗粒含量的增加,所制备的球团孔隙度降低,磁铁精矿球团预热焙烧过程中,磁铁矿氧化反应与固相结晶反应相互制约,是其对磁铁精矿球团预热及焙烧性能的改善作用不大的主要原因。

Mechanism of high pressure roll grinding on compression strength of oxidized hematite pellets

The mechanism of high pressure roll grinding on improvement of compression strength of oxidized hematite pellets was researched by considering their roasting properties.The results indicate that oxidized hematite pellets require higher preheating temperature and longer preheating time to attain required compression strength of pellets compared with the common magnetite oxidized pellets.It is found that when the hematite concentrates are pretreated by high pressure roll grinding(HPRG),the compression strengths of preheated and roasted oxidized hematite pellets get improved even with lower preheating and roasting temperatures and shorter preheating and roasting time.The mechanism for HPRG to improve roasting properties of oxidized pellets were investigated and the cause mainly lies in the increase of micro-sized particles and the decrease of dispersion degree for hematite concentrates,which promotes the hematite concentrate particles to be compacted,the solid-phase crystallization,and finally the formation of Fe2O3 bonding bridges during subsequent high temperature roasting process.

选矿拜耳法氧化铝生产中铁硫的富集及处理对策探究

对氧化铝生产中的选矿拜耳法进行研究。根据铝矿行业的运行特点,分析选矿拜耳法使用的优势及具体流程,旨在通过选矿拜耳法技术的运用,提高氧化铝生产中铁硫富集处理的效率,增强铝资源的使用价值,为行业的可持续发展提供参考。

推广铝矿选矿技术促进氧化铝工业发展浅析

针对氧化铝工业产业发展现状,研究铝矿选矿技术,总结铝选矿技术使用中存在的问题,旨在根据这些问题创新氧化铝工业发展形式。通过铝矿选矿技术的推广,提高铝矿资源的开采效率,满足我国氧化铝工业产业的现代化发展需求。