High-efficiency direct acid leaching of vanadium from clay vanadium ore with microwave enhancement

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-10-23 DOI:10.1016/j.mineng.2025.109857

Yun Zhang , Guohua Ye , Surong Mao , Xinyue Xiang , Yiyang Rong , Changxu Song

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Abstract

Clay vanadium ore, as an important raw material for vanadium extraction, has broad application prospects when efficiently processed. By comparing the two processes of microwave-enhanced acid leaching and regular acid leaching, the influences of factors such as microwave power, the composition ratio and dosage of MF named after manganese and fluorine elements, sulfuric acid dosage, leaching time, and leaching temperature on the vanadium leaching efficiency were investigated. The results showed that microwave-enhanced acid leaching could effectively shorten the leaching time and increase the vanadium leaching efficiency. In the process of microwave-enhanced acid leaching of vanadium, the four factors of microwave power, MF dosage, sulfuric acid dosage, and leaching time had certain interaction effects with each other, and their influence degrees on the vanadium leaching efficiency were: MF dosage > sulfuric acid dosage > microwave power > leaching time. Through test optimization, the optimal process parameters for microwave-enhanced acid leaching were determined as follows: microwave power of 320 W, mass ratio of manganese oxide to fluoride 20 %:80 %, MF dosage of 4 %, sulfuric acid dosage of 16 %, leaching temperature of 95 °C, and leaching time of 5 h. Under these conditions, the vanadium leaching efficiency could reach 92.40 %. The high-frequency oscillation and heating effects of microwaves can effectively destroy the mineral structure, accelerate the reaction rate of vanadium-bearing muscovite, and promote vanadium leaching.

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微波强化粘土钒矿中钒的高效直接酸浸

粘土钒矿石作为提钒的重要原料，如果处理得当，具有广阔的应用前景。通过对微波强化酸浸和常规酸浸两种工艺的比较，考察了微波功率、锰氟元素MF的组成比例和用量、硫酸用量、浸出时间、浸出温度等因素对钒浸出效率的影响。结果表明，微波强化酸浸可有效缩短浸出时间，提高钒浸出效率。在微波强化酸浸钒过程中，微波功率、微波投加量、硫酸投加量、浸出时间四个因素之间存在一定的交互作用，其对钒浸出效率的影响程度分别为：微波投加量>；硫酸投加量>；微波功率>；浸出时间。通过试验优化，确定了微波强化酸浸的最佳工艺参数为：微波功率320 W，氧化锰与氟质量比20%:80%，MF用量4%，硫酸用量16%，浸出温度95℃，浸出时间5 h，在此条件下，钒浸出率可达92.40%。微波的高频振荡和加热作用能有效破坏矿物结构，加快含钒白云母的反应速度，促进钒浸出。

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.