HPAL of a lateritic nickel ore: An investigation on the relationship between nickel and cobalt extraction and acid consumption

IF 4.9 2区 工程技术 Q1 ENGINEERING, CHEMICAL Minerals Engineering Pub Date : 2024-10-01 DOI:10.1016/j.mineng.2024.109014
Büşra Çoban, Ahmet Deniz Baş
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Abstract

Nickel and cobalt raw materials have become essential in industries like batteries such as robotics, and drones, which are considered as future technologies due to their expanding applications and diversity. Research towards the development of environmentally friendly and relatively low-cost alternative methods for extracting nickel, particularly from low-grade deposits, is becoming increasingly crucial. Laterite ores processing is plagued by high reagent consumption and scale formation. This study focused on investigating the relationship between Ni and Co extraction and acid consumption in the high-pressure acid leaching of lateritic ore, as well as the characterization of leach residue. Analysis has shown that the lateritic ore contains 1.05 % Ni, 0.05 % Co and 21.94 % Fe. In the acid leaching tests based upon a Box-Behnken Design, the initial acid concentration and leach time have a beneficial effect on the Ni extraction (70–94 %). Cobalt extractions ranged between 93 % and 96 %. To facilitate Fe dissolution and increase Ni extraction, cuprous ions were added into the leach solution. Moderate level copper addition (0.025 M) resulted in a significant improvement in Ni extraction, whereas high levels of cuprous addition (0.050 M) did not have further benefit. It has been noted that adding cuprous ions significantly reduces the amount of scale that forms in the autoclave. The lowest Ni extraction was obtained under two different test conditions that did not include copper ions. Increased acid addition was correlated with the increase in Ni leaching and decreased Fe content in residue. There will exist an optimal situation where the acid addition is enough to enhance Ni dissolution and the Eh condition, leading to minimal dissolved Fe.
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红土镍矿的 HPAL:镍和钴的提取与酸消耗之间关系的研究
镍和钴原料已成为机器人和无人机等电池行业的必需品,由于其应用范围不断扩大,且具有多样性,这些行业被视为未来技术。研究开发环保且成本相对较低的镍提取替代方法,尤其是从低品位矿藏中提取镍的方法,正变得越来越重要。红土矿石加工过程中存在试剂消耗高和结垢的问题。本研究的重点是调查红土矿石高压酸浸出过程中镍和钴的提取与酸消耗之间的关系,以及浸出残渣的特征。分析表明,红土矿石中含有 1.05 % 的镍、0.05 % 的钴和 21.94 % 的铁。在基于 Box-Behnken 设计的酸浸出试验中,初始酸浓度和浸出时间对镍的提取率(70%-94%)产生了有利影响。钴的萃取率在 93% 到 96% 之间。为了促进铁的溶解并提高镍的萃取率,在浸出液中加入了亚铜离子。中度铜添加量(0.025 M)显著提高了镍的萃取率,而高浓度亚铜添加量(0.050 M)则没有进一步提高镍的萃取率。人们注意到,添加亚铜离子可显著减少高压釜中形成的水垢量。在不添加铜离子的两种不同试验条件下,镍的萃取率最低。酸添加量的增加与镍萃取量的增加和残渣中铁含量的降低有关。存在一种最佳情况,即酸的添加量足以提高镍的溶解和 Eh 条件,从而使溶解的铁最少。
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来源期刊
Minerals Engineering
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.
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