高铁铝土矿与煤矸石共焙烧实现铁铝分离
A novel utilization of high-Fe bauxite through co-roasting with coal gangue to separate iron and aluminum minerals
袁帅 1黄成 2白哲 2王若枫 2丁浩源2
作者信息
- 1. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China;National and Local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China
- 2. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National and Local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China
- 折叠
摘要
高铁铝土矿是一种储量巨大的典型难选铝土矿,而煤矸石是选煤过程中产生的固体废弃物.本研究提出将高铁铝土矿与煤矸石共焙烧回收铁铝的方法.确定共焙烧的最佳条件为焙烧温度750℃、焙烧时间50 min、煤矸石配比40%及磨矿粒度<37 μm的占70.55%.焙烧产品经过磁选管磁选,最终能得到总铁品位为55.09%、铁回收率为82.73%的铁精矿和Al2O3含量为21.67%、铝回收率达75.55%的富铝产品.物相分析表明,共焙烧过程能将高铁赤泥中的赤铁矿有效转化为磁铁矿,将一水硬铝石转化为Al2O3.实验表明,高铁铝土矿与煤矸石共焙烧是一种很有应用前景的铁铝回收工艺.
Abstract
High-Fe bauxite is a typical refractory bauxite with extensive resources,and coal gangue is a solid waste produced during coal preparation.In this study,the co-roasting of high-Fe bauxite with coal gangue for iron and aluminum recycling was explored.The optimum conditions for co-roasting were roasting at 750℃ for 50 min with 40%coal gangue,and 70.55%particles with size<37 μm.Through magnetic separation,iron ore concentrate with 55.09%Tfe and a recycling rate of 82.73%,and aluminum-rich products with Al2O3 of 21.67%and a recycling rate of 75.55%were produced.Based on the analysis of materials,hematite was transformed into magnetite,and diaspore was transformed into Al2O3 through co-roasting.Therefore,the co-roasting of high-Fe bauxite and coal gangue is a promising process for recycling iron and aluminum.
关键词
煤矸石/高铁铝土矿/共焙烧/铁精矿Key words
coal gangue/high-Fe bauxite/co-roasting/separation/iron ore concentrate引用本文复制引用
基金项目
Open Foundation of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,China(CNMRCUKF2301)
National Natural Science Foundation of China(52174240)
National Key Research and Development Program of China(2021YFC2902404)
Fundamental Research Funds for the Central Universities,China(N2101023)
出版年
2023
NETL
NSTL
维普
万方数据