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Selective depression action of taurine in flotation separation of specularite and chlorite

International Journal of Mining Science and Technology 2022年第3期32卷 637-644页

作者： Mingyang Li Cheng Yang Zhaoyang Wu Xiangpeng Gao Xiong Tong Xiankun Yu Hongming Long School of Metallurgical Engineering Anhui University of TechnologyMaanshan 243032China Faculty of Land and Resource Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of Safety and Health for Metal Mine Maanshan 243071China Huawei National Engineering Technical Research Center of High Efficient Recylic Utilization for Metal Minerals Co. LtdMaanshan 243071China

Chlorite,as the most representative gangue mineral associated with specularite,of which the separation of these two minerals is *** paper investigated the depression effect of taurine on specularite/chlorite separation via flotation experiments,adsorption tests,contact angle measurements,Zeta potential detection,FT-IR measurements,and XPS *** results of single mineral flotation indicated that chlorite could be depressed selectively by taurine with the recovery of less than 30%,but the floatability of specularite remains high with recovery rate of 81.77%at pH *** artificial mixed mineral flotation results confirmed the effectiveness of taurine as a *** adsorption,contact angle,and Zeta potential detection revealed taurine primarily adsorbs on the chlorite surface,which hampered the DDA’s subsequent adsorption and results in the chlorite’s poor *** FT-IR spectra and XPS analyses provided further proof that taurine adsorbed on chlorite surface as an electron donor,and part of the electrons transferred from the sulfonic acid group of taurine to metal ions during the adsorption *** addition,the hydrogen bond between amino-group of taurine and O ions in chlorite surface was also formed in the adsorption ***,optimized adsorption configurations of taurine on chlorite surfaces were proposed.

关键词： Flotation Taurine specularite Chlorite Iron-containing Silicates Depressant

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

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 56-65页

作者： Xi Zhang Shun-wei Zhu Yu-jiang Li Yong-li Li Qiang Guo Tao Qi National Engineering Laboratory of Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Environmental Science and Engineering Shandong UniversityQingdao 266200China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou 450003China

This study used specularite, a high-gradient magnetic separation concentrate, as a raw material in reverse *** 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 *** 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 *** with sulfuric acid produced iron red pigments with different ***, middlings with a grade of 60.20 wt% and a recovery rate of 17.51% were obtained and could be used in blast furnace ***-value utilization of specularite beneficiation products was thus achieved.

关键词： specularite reconcentration centrifugal concentrator iron oxide red pigment

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Comparison of sintering performance of typical specular hematite ores with distinct size distributions

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Journal of Iron and Steel Research International 2017年第10期24卷 1007-1015页

作者： Cong-cong Yang De-qing Zhu Ben-jing Shi Jian Pan Li-ming Lu Xiao-bo Li Ya-ping Mo School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083HunanChina CSIRO Mineral Resources Brisbane QLD 4069Australia Products&Technique Management Department Baosteel Zhanjiang Iron and Steel Co.Ltd.Zhanjiang 524000GuangdongChina Ironmaking Plant Wuhan Iron and Steel Company LimitedWuhan 430083HubeiChina

The sintering performance of three typical specular hematite ores（coarse SO-A,intermediate SO-B and ultrafine SO-C）was compared in an industrial ore blend through pilot-scale sinter pot *** effect of particle size of specular hematite ores on their granulation and sintering performance was *** with the coarse SO-A fine and ultrafine SO-C concentrate,the intermediate SO-B showed inferior granulation and sintering performance characterized with poorer bed permeability and productivity,lower sinter strength and higher fuel rates.A new material preparation method was hence proposed and verified at both pilot and industrial *** proposed method by mixing SO-B with a high amount of goethitetype iron ore fines was found to be an effective way in improving the granulation and assimilative characteristics of ore blend comprising 31%intermediate SO-B,leading to improved sinter productivity and lowered fuel *** metallurgical properties and microstructure of sinters were also *** sinters obtained through the proposed preparation method were generally stronger and more reducible on account of better sinter structure with more relict hematite ultimately connected with needle-like silico-ferrite of calcium and aluminum and lower porosity.

关键词： Sinter specularite Iron ore Size distribution Granulation Goethite

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