首页|Enrichment of Nb and Ti from carbonatite pyrochlore ore via calcining-slaking followed by gravity separation

Enrichment of Nb and Ti from carbonatite pyrochlore ore via calcining-slaking followed by gravity separation

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In this work,a novel process consisting of calcining-slaking followed by gravity separation for the enrich-ment of niobium(Nb)and titanium(Ti)from carbonatite pyrochlore ore was proposed,validated and compared with the current mainstream flotation method.During calcining of the pyrochlore ore,within which the carbonates were transformed into lime.Subsequently,when the calcined ore was slaked,lime was transformed into hydroxide with fine particles which were amenable to gravity separation.After cal-cining at 900℃for 60 min,slaking at 90℃for 10 min with a liquid-solid ratio of 3∶1(mL/g),approxi-mately 40％of tailings can be removed by gravity separation,the recoveries of Nb and Ti were 94.7％and 91.0％,and the enrichment ratios of Nb and Ti were 1.61 and 1.43,respectively.The new approach exhibits high separation efficiency of carbonate gangue minerals and valuable minerals,satisfactory recoveries of niobium as well as titanium can be achieved.

NiobiumTitaniumPyrochlore oreCalcinationGravity separation

Shuhui Zhang、Mingjun Rao、Rendong Xiao、Jinxiang You、Guanghui Li、Tao Jiang

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School of Minerals Processing&Bioengineering,Central South University,Changsha 410083,China

Basic Science Center Project for National Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaHunan Provincial Innovation Founda-tion for Postgraduate

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2022

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDSCIEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2022.32(3)
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