New process for treating boron-bearing iron ore by flash reduction coupled with magnetic separation  

作　　者：Qipeng Bao Lei Guo Hong Yong Sohn Haibin Zuo Feng Liu Yongliang Gao Zhancheng Guo 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China [2]Department of Materials Science&Engineering,University of Utah,Utah 84112,USA [3]China ENFI Engineering Corporation,Beijing 100038,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第3期473-484,共12页矿物冶金与材料学报（英文版）

基　　金：supported by the Science and Technology Special Plan Project from China Minmetals Group (No.2020ZXA01);the International Exchange and Growth Program for Young Teachers (No.QNXM20220061);the National Key Research and Development Program of China (No.2022YFC2906100).

摘　　要：Boron is an important industrial raw material often sourced from minerals containing different compounds that cocrystallize,which makes it difficult to separate the mineral phases through conventional beneficiation.This study proposed a new treatment called flash reduction-melting separation(FRMS)for boron-bearing iron concentrates.In this method,the concentrates were first flash-reduced at the temperature under which the particles melt,and the slag and the reduced iron phases disengaged at the particle scale.Good reduc-tion and melting effects were achieved above 1550℃.The B_(2)O_(3) content in the separated slag was over 18wt%,and the B content in the iron was less than 0.03wt%.The proposed FRMS method was tested to investigate the effects of factors such as ore particle size and tem-perature on the reduction and melting steps with and without pre-reducing the raw concentrate.The mineral phase transformation and morphology evolution in the ore particles during FRMS were also comprehensively analyzed.

关 键 词：LUDWIGITE boron-bearing iron concentrate flash reduction melting separation BORON 

分 类 号：TD951[矿业工程—选矿] TF56[冶金工程—钢铁冶金]