Ferronickel preparation using Ni-Fe co-deposition process

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• 作者：Fei Wang 王飞 ; Lei Li 李磊 ; Shi-wei Qiu 邱士伟 ; Hua Wang 王华
• 关键词：Key wordsNi ; Fe co ; deposition ; nucleation mechanism ; high Fe2+ concentration surrounded ; waste regeneration
• 刊名：Journal of Central South University
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：23
• 期：12
• 页码：3072-3078
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Engineering, general; Metallic Materials;
• 出版者：Central South University
• ISSN：2227-5223
• 卷排序：23

文摘

Nucleation mechanism and technological process for Ni-Fe co-deposition with a relatively high Fe2+ concentration surrounded were described, and the effects of Fe2+ concentration, solution pH, temperature, and sodium dodecyl sulfonate concentration were investigated. Electrochemical experiments demonstrate that iron’s electrodeposition plays a leading role in the Ni-Fe co-deposition process, and the co-deposition nucleation mechanism accords with a progressive nucleation. Temperature increase does favor in increasing nickel content in the ferronickel (Ni-Fe co-deposition products), while Fe2+ concentration increase does not. When solution pH is higher than 3.5, nickel content in the ferronickel decreases with pH because of the hydrolysis of Fe2+. With the current density of 180 A/m2, Na₂SO₄ concentration of 100 g/L and Ni2+ concentration of 60 g/L, a smooth ferronickel deposit containing 96.21% Ni can be obtained under the conditions of temperature of 60 °C, Fe2+ concentration of 0.3 g/L, solution pH of 3 and sodium dodecyl sulfonate concentration of 40 mg/L.