Process mineralogy approach to optimize curing-leaching in vanadium-bearing stone coal processing plants

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外文摘要：The purpose of this study is to apply process mineralogy as a practical tool to further understand and ana-lyze the reasons for low leaching rates in the curing-leaching process of vanadium-bearing stone coal and to find a solution or improvement to optimize the leaching index.Using vanadium-bearing stone coal with the V2O5 mass fraction of 0.88％as the research object,the effects of particle size,mineral compo-sition,and sulfuric acid curing on the feed,intermediate,and final products of curing-leaching were ana-lyzed.The main vanadium-bearing minerals in the feed samples included sericite/illite,montmorillonite,kaolinite,limonite,and schreyerite.Through the penetration depth analysis of sulfuric acid,the reason for the high vanadium content in the coarse leaching residue(0.205％V2O5)was found,mainly due to the poor curing effect and incomplete washing after screening.Therefore,thorough washing after sieving and further optimizing the curing process are necessary.The vanadium content of the fine leaching resi-due(0.078％)was low and the curing-leaching effect was good.However,the vanadium content in the thickened residue(0.296％)exceeded that in the fine leaching residue,which was attributed to the neu-tralization reaction in the#1 thickener.To solve this problem,the neutralization and thickening pro-cesses should be performed in separate equipment.The analysis and detection of key products is helpful for identifying problems and improving the curing-leaching circuit process.

外文关键词：

Process mineralogyVanadiumStone coalCuring-leachingPenetration

作者：

Hui Li、Yuexin Han、Jianping Jin、Peng Gao、Zhenya Zhou

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作者单位：

School of Resource and Civil Engineering,Northeastern University,Shenyang 110819,China

National-Local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China

基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShaanxi Innovation Capacity Support PlanShaanxi Natural Science Basic Research Program

项目编号：

2020YFC190970451904222520740682020KJXX-0532019JQ-468

出版年：

2023

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)

CSTPCDCSCD北大核心EI

影响因子：1.222

ISSN：2095-2686

年,卷(期)：2023.33(1)

参考文献量8