摘要
为了经济、合理地利用高磷赤铁矿资源,在掌握试验用高磷鲕状赤铁矿理化特性和微观特性的基础上,采用直接还原法进行了固态直接还原+高强度磁选和直接生产珠铁2种工艺的试验研究。试验结果表明,高温度、低碱度以及高配碳量有利于铁矿石中磷灰石还原进入铁水中,不利于磷的脱除;通过工艺参数的优化,采用固态还原焙烧-磁选工艺,高磷赤铁矿脱磷率能达到60%以上,而采用珠铁工艺,其脱磷率能够达到80%以上。为合理高效地处理高磷鲕状赤铁矿奠定理论基础和技术依据。
Physical, chemical and microscopic characteristics of high phosphorus oolitic hematite were investigated firstly. And the experiments of high phosphorus hematite used in the solid state direct reduction＋ high-intensity magnetic separation and iron nugget direct reduction processes were studied. The experiment results show that high temperature, low basicity and high carbon content is conducive for the apatite in iron ore to reduce into molten iron, but not conducive to the removal of phosphorus. Through optimization of process parameters, dephosphorization rate of high phosphorus hematite is more than 60% by solid state direct reduction roasting＋ magnetic separation process while that is up to 80% by iron nugget process. Theoretical and technical basis on economical and rational use of high phosphorus oolitic hematite can be provided.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2014年第3期27-31,共5页
Journal of Iron and Steel Research
关键词
高磷鲕状赤铁矿
直接还原
磁选
脱磷
high phosphorus oolitic hematite
direct reduction
magnetic separation t dephosphorization
