微波流态化预处理鲕状赤铁矿的创新技术:分离特性和机理
An innovative technology for utilization of oolitic hematite via microwave fluidization pretreatment: Separation characteristics and mechanism
周文涛 1吕宪俊 2孙永升 3袁帅 3柳晓 2赵永强2
作者信息
- 1. College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China;State Key Laboratory of Mineral Processing,Beijing 102628,China
- 2. College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China
- 3. College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China
- 折叠
摘要
鲕状赤铁矿具有资源储量大、铁品位低、嵌布粒度细、矿物成分复杂等特点,传统选矿工艺难以有效利用.本文提出了一种新的微波流态化预处理工艺(MFP)来强化鲕状赤铁矿的分离.采用扫描电子显微镜、振动样品磁强计和激光粒度分析仪研究了MFP对焙烧磁选和浸出的影响.结果表明,与常规电炉预处理(EFP)相比,MFP焙烧产物的磁性显著提高,其磁选精矿的铁品位从56.88％提高到58.72％;回收率从88.89％提高到89.32％,浸出渣的磷含量从0.17％降至0.11％,MFP使磷浸出率从83.06％提高到89.77％.MFP可以强化微裂纹的形成和生长,从而增加矿石的比表面积和可磨性.
Abstract
Oolitic hematite possesses the characteristics of large resource reserves, low iron grade, fine embedded particle size and complex mineral composition, which is difficult to be used efficiently through traditional beneficiation process. In this work, a new technology of microwave fluidization pretreatment (MFP) was proposed to strengthen the separation of oolitic hematite. Scanning electron microscope, vibrating sample magnetometer and laser particle size analyzer were used to explore the influence of MFP on roasting magnetic separation and leaching. The results presented that compared with conventional electric furnace pretreatment, the magnetism of roasting products has been significantly improved. The iron grade was increased from 56.88％ to 58.72％ and recovery was increased from 88.89％ to 89.32％ for magnetic separation concentrate. Phosphorus content of leaching residue was reduced from 0.17％ to 0.11％, and phosphorus leaching rate was increased from 83.06％ to 89.77％ by MFP. MFP could strengthen microcrack formation and growth, increasing the specific surface area and the grindability of ore.
关键词
微波预处理/流态化焙烧/鲕状赤铁矿/分离特性Key words
microwave pretreatment/fluidization roasting/oolitic hematite/separation characteristics引用本文复制引用
基金项目
National Natural Science Foundation of China(52104257)
National Natural Science Foundation of China(52104259)
Open Foundation of State Key Laboratory of Mineral Processing,China(BGRIMM-KJSKL-2023-16)
Start Up Fund for Talent Introduction and scientific Research of Shandong University of Science and Technology,China(skr21-3-A-022)
出版年
2023
NETL
NSTL
维普
万方数据