摘要
以硼铁精矿团块为原料进行煤基直接还原试验,考察了钠盐添加剂及不同冷却方式对还原焙烧矿中硼活性的影响。结果表明,Na2CO3的添加使硼主要以玻璃体形式存在于还原焙烧矿中,硼活性显著降低,且不利于铁矿物的还原;另外,Na2CO3与硼镁石的热解产物遂安石反应形成低熔点硼酸钠盐,造成硼的挥发损失。硼铁精矿无钠盐还原焙烧时,无液相形成。以水淬方式冷却硼活性最高,为80.76%。
An experiment on coal-based direct reduction ol boron-bearing iron concentrate was carried out under laboratory conditions,and effects ol additive sodium salt and different cooling methods on the boron reactivity ol roasted ore were investigated.Results showed that alter adding Na2C〇3,boron mainly existed in the reduction roasting product with the form of vitreous body with reactivity significantly reduced,which was not conductive to the reduction of iron minerals.Meanwhile,Na2C〇3 reacted with suanite,the thermal decomposition product of ascharite,to form low melting point sodium borate salts,resulting in a loss of boron by means of volatilization.It is found that there was no liquid phase generated during the reduction roasting of boron-bearing iron concentrate without sodium carbonate.The roasted ore cooled by water quenching led to the highest boron reactivity of 80.76%.
作者
余建文
韩跃新
高鹏
李艳军
储满生
YU Jian-wen;HAN Yue-xin;GAO Peng;LI Yan-jun;CHU Man-sheng(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,Liaoning,China;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2018年第4期80-82,共3页
Mining and Metallurgical Engineering
基金
国家自然科学基金(51204033)
关键词
硼铁精矿
直接还原
钠化焙烧
冷却方式
硼活性
boron-bearing iron concentrate
direct reduction
roasting with sodium salt
cooling methods
boron activity