Flotation separation of scheelite and calcite using the biopolymer konjac glucomannan:A novel and eco-friendly depressant  

作　　者：Zhenhao Guan Ying Zhang Shuming Wen Qi Zuo Yu Wu Xiaokang Li 

机构地区：[1]Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China [3]Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources,Kunming 650093,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第5期1056-1067,共12页矿物冶金与材料学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52164022).

摘　　要：This study investigated the effect of konjac glucomannan(KGM)on the flotation separation of calcite and scheelite.Micro-flotation tests showed that under the action of 50 mg/L KGM,the floatability of calcite notably decreased,while the impact on scheelite was negligible,resulting in a recovery difference of 82.53%.Fourier transform infrared(FTIR)spectroscopy and atomic force micro-scopy(AFM)analyses indicated the selective adsorption of KGM on the calcite surface.Test results of the zeta potential and UV-visible absorption spectroscopy revealed that KGM prevented the adsorption of sodium oleate on the calcite surface.X-ray photoelectron spec-troscopy(XPS)analysis further confirmed the chemical adsorption of KGM on the calcite surface and the formation of Ca(OH)_(2).The density functional theory(DFT)simulation results were consistent with the flotation tests,demonstrating the strong adsorption perform-ance of KGM on the calcite surface.This study offers a pathway for highly sustainable and cost-effective mineral processing by utilizing the unique properties of biopolymers such as KGM to separate valuable minerals from gangue minerals.

关 键 词：SCHEELITE CALCITE selective depressant konjac glucomannan surface adsorption FLOTATION 

分 类 号：TD923[矿业工程—选矿]