摘要
针对高磷铁矿因铁矿物与磷矿物共生关系复杂、常规选矿方法难以高效利用的特点,提出了焙烧—浸出的提铁降磷技术。对阿尔及利亚TFe品位为60.81%、FeO含量为14.92%、P含量为0.71%的某高磷铁矿,采用悬浮焙烧(氧化焙烧—磁化焙烧)—磁选—浸出工艺开展了提铁脱磷实验研究,在氧化温度1 050℃、还原温度520℃、还原时间25 min、H2体积浓度50%的磁化焙烧工艺条件下,获得了TFe品位65.50%、TFe回收率96.31%、P含量0.16%的铁精矿指标,磷脱除率77.46%。实验研究结果可为高磷铁矿提铁降磷提供指导。
In response to the characteristics of high-phosphorus iron ore,which the complex symbiotic relationship between iron minerals and phosphate minerals in high-phosphorus iron ore and the difficulty in efficient utilization through conventional beneficiation methods.The roasting-leaching technology for iron extraction and phosphorus reduction was proposed with a view to achieving efficient utilization of high-phosphorus iron ore.This paper investigated a high-phosphorus certain iron ore with a TFe grade 60.81%,FeO content14.92%,and P content 0.71%extracted from Algeria.The experimental study on iron extraction and dephosphorization was carried out by oxidizing roasting-magnetization roasting-magnetic separation-leaching process.The magnetic roasting process conditions of oxidation temperature 1050°C,reduction temperature 520°C,reduction time 25 min and H2 concentration 50%were determined.The iron concentrate indexes of total Fe grade 65.50%,total Fe recovery 96.31%and P content 0.16%were obtained,which 77.46%of P removed.The experimental results offer guidance for iron extraction and dephosphorization of iron ore in Algeria.
作者
王绍兴
宁国栋
刘应志
李艳军
WANG Shaoxing;NING Guodong;LIU Yingzhi;LI Yanjun(Shanghai Milestone Technology Co.,Ltd.,Shang Hai 201600,China;School of Resources and Civil Engineering,Northeast University,Shenyang 110819,China;National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China)
出处
《矿产保护与利用》
2024年第1期82-88,共7页
Conservation and Utilization of Mineral Resources
关键词
高磷铁矿
氧化焙烧
磁化焙烧
浸出
high-phosphorus iron ore
oxidizing roasting
magnetic roasting
leaching
