Distribution of Nickel in the Slags of Electrothermal Ferronickel Production and Technological Schemes of Its Utilization

International Ferro-Alloys Conference (INFACON XVI) 2021 Pub Date : 2021-09-12 DOI:10.2139/ssrn.3929908

D. Shevchenko, O V Zamkovoy, K D Sokolov, V U Shutov, A. N. Ovcharuk, S. A. Melnik, V N Rudik

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Abstract

Development of world industrial production is aimed to optimize the use of mineral resources, the utilization of secondary material and energy resources, and environmental protection. The production of ferronickel from oxidized nickel ores is based on the use of raw materials, where the nickel content practically does not exceed 2.5%, therefore the process is characterized by a large slag volume and slag-metal ratios 6-10 times, which is the highest in smelting of ferroalloys. The samples of electric furnace and refining slags from ferronickel production using oxidized nickel ore from Guatemala were studied by X-ray spectral microanalysis (X-raySMA) method at the Selmi REM-106I facility. It was determined that majority of nickel is concentrated prills of various shapes contains iron and sulfur, where the Ni content in some cases exceeds 70%. The processing routes for recovery of nickel from furnace slags by "wet" technology and refining slags by "dry" technology with the use of a modernized magnetic separator is developed and proposed for introduction, which allows for recovery of 31.6% and 94.65% nickel from the slag respectively

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电热镍铁生产炉渣中镍的分布及其利用技术方案

世界工业生产的发展是以矿产资源的优化利用、二次材料和能源的利用以及环境保护为目标的。氧化镍矿生产镍铁以原料为基础，其中镍含量实际上不超过2.5%，因此该工艺的特点是渣量大，渣金比6-10倍，是铁合金冶炼中最高的。采用x射线光谱显微分析(X-raySMA)方法对危地马拉氧化镍矿生产镍铁的电炉和精炼渣样品进行了研究。经测定，大多数镍是各种形状的浓缩颗粒，其中含有铁和硫，其中镍含量在某些情况下超过70%。提出了采用“湿法”工艺从炉渣中回收镍和采用现代化磁选机采用“干法”工艺精炼炉渣的工艺路线，可使炉渣中镍的回收率分别达到31.6%和94.65%

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International Ferro-Alloys Conference (INFACON XVI) 2021

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