Carbon Thermal Reduction of Nickel Laterite Leaching Slag for Efficient Enrichment and Retrieval Efficiency of Iron

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-06-13 DOI:10.1007/s11837-025-07483-z

Tingshuai Li, Yusheng Wu, Yuzheng Wang, Feng Liu, Laishi Li

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Abstract

As a representative solid waste in the domain of the nickel laterite ore industry, the resource utilization of nickel laterite leaching slag is always a difficult problem for the metallurgical industry. In this paper, the method of non-molten roasting reduction magnetic separation with anthracite as the reducing agent was investigated to enrich and recover iron from nickel laterite ore leaching slag. The reduction mechanism of the process was analyzed by thermodynamic calculations and equilibrium simulations of the physical phase. The effects of roasting temperature, holding time, and anthracite dosage on the conversion rate of iron-bearing minerals were studied. The response surface has been used to analyze the interaction of influencing factors. The optimum reduction conditions were: roasting temperature of 1320 °C, duration of 60 min, and reductant dosage of 25 wt.%. The iron purity and retrieval efficiency in the concentrate were 76.08% and 95.19%, respectively. The physical phase composition, microstructure, and magnetization intensity of the reduction products were studied by XRD, SEM-EDS, and VSM. The reduction mechanism of reactants and the aggregation process of products were studied.

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镍红土浸出渣碳热还原高效富集和回收铁

红土镍矿浸出渣作为红土镍矿工业领域中具有代表性的固体废物，其资源化利用一直是困扰冶金工业的难题。研究了以无烟煤为还原剂的非熔融焙烧还原磁选法富集回收镍红土矿浸出渣中的铁。通过热力学计算和物理相平衡模拟分析了该过程的还原机理。研究了焙烧温度、保温时间和无烟煤用量对含铁矿物转化率的影响。利用响应面分析了影响因素之间的相互作用。最佳还原条件为：焙烧温度1320℃，焙烧时间60min，还原剂用量25wt .%。精矿铁纯度为76.08%，回收率为95.19%。采用XRD、SEM-EDS和VSM对还原产物的物相组成、微观结构和磁化强度进行了研究。研究了反应物的还原机理和产物的聚集过程。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.