Purification of specularite by centrifugation instead of flotation to produce iron oxide red pigment  

作　　者：Xi Zhang Shun-wei Zhu Yu-jiang Li Yong-li Li Qiang Guo Tao Qi 

机构地区：[1]National Engineering Laboratory of Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China [2]School of Environmental Science and Engineering,Shandong University,Qingdao 266200,China [3]Zhengzhou Institute of Emerging Industrial Technology,Zhengzhou 450003,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第1期56-65,共10页矿物冶金与材料学报（英文版）

基　　金：jointly funded by the National Natural Science Foundation of China (No.51304181);the Key Research Program of Frontier Sciences of Chinese Academy of Sciences (No.QYZDJ-SSW-JSC021);the Key Research Program of Chinese Academy of Sciences (No.ZDRW-ZS-2018-1)。

摘　　要：This study used specularite, a high-gradient magnetic separation concentrate, as a raw material in reverse flotation.An iron concentrate with a grade of 65.1 wt% and a recovery rate of 75.31% were obtained.A centrifugal concentrator served as the deep purification equipment for the preparation of iron oxide red pigments, and its optimal rotating drum speed, feed concentration, and other conditions were determined.Under optimal conditions, a high-purity iron oxide concentrate with a grade of 69.38 wt% and a recovery rate of 80.89% were obtained and used as a raw material for preparing iron oxide red pigment.Calcining with sulfuric acid produced iron red pigments with different hues.Simultaneously, middlings with a grade of 60.20 wt% and a recovery rate of 17.51% were obtained and could be used in blast furnace ironmaking.High-value utilization of specularite beneficiation products was thus achieved.

关 键 词：SPECULARITE RECONCENTRATION centrifugal concentrator iron oxide red pigment 

分 类 号：TQ622.15[化学工程—精细化工]