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Leaching kinetics and reactivity evaluation of ferronickel slag in alkaline conditions

机译:碱性条件下铁酮渣的浸出动力学和反应性评价

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This paper evaluates the reactivity of individual mineral phases of ferronickel slag (FNS) based on the back-scattered electron images analysis (BSE-IA) and presents the leaching kinetics of FNS in NaOH solutions, aiming to reveal the interrelationships among physicochemical properties, leaching behavior and reactivity of FNS. There are three typical phases identified in water-quenched FNS, namely FNS I, II and III phase. The FNS I phase is more prone to dissolve and preferentially participate in the reaction process than the other two phases. The dissolved Mg from FNS is mainly involved in the formation of hydrotalcite and N-M-S-H gels. Cr could not be detected during the leaching process. The activation energy for the leaching of Si and Al is 80.47 and 49.45 kJ/mol, respectively. A method for rapid evaluation of the reaction activity of FNS given the evaluation index of the individual leaching ratio of Si and Al is proposed.
机译:本文基于背部散散电子图像分析(BSE-IA)评估Ferronickel渣(FNS)的单个矿物阶段的反应性,并呈现NaOH溶液中FNS的浸出动力学,旨在揭示物理化学性质,浸出的相互关系 FNS的行为和反应性。 在水猝灭FNS中鉴定了三个典型的相,即FNS I,II和III阶段。 FNS I相更容易溶解并优先参与反应过程而不是其他两个阶段。 来自FNS的溶解Mg主要涉及水滑石和N-M-S-H凝胶的形成。 在浸出过程中无法检测到CR。 Si和Al浸出的激活能量分别为80.47和49.45 kJ / mol。 提出了一种鉴于Si和Al各种浸出比的评价指数的FNS反应活性的快速评价方法。

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