Alkaline refining of crude lead: a method of arsenic removal and the behavior of arsenic in the process

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Metallurgical Research & Technology Pub Date : 2022-01-01 DOI:10.1051/metal/2021090

R. Zhu, Hailin Long, Haoyu Li, Huimin Xie, Shao-hua Yin, Yongmi Wang, Libo Zhang, Shiwei Li

引用次数: 0

Abstract

In this work, the alkaline refining of arsenic in crude lead was studied with a mixture of sodium hydroxide and sodium carbonate as alkaline refining agents. Taking the arsenic removal rate as the research object, the effects of reaction temperature, holding time, Na2CO3:NaOH, the dosage of refining agent were investigated. The arsenic removal rate is 79.09% under the optimum experimental conditions as follows: reaction temperature 823 K, holding time 60 min, Na2CO3:NaOH 1:4, refining agent dosage 10%. The oxidation purification mechanism of arsenic was studied by XPS, SEM-EDS, XRD and FT-IR. The results show that arsenic in the crude lead is gradually oxidized by oxygen and lead oxide during arsenic removal process, and the arsenic trioxide is eventually converted into sodium arsenate (Na3AsO4) and lead arsenate (Pb2As2O7) in the slag.

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粗铅的碱性精炼:一种除砷的方法及过程中砷的行为

以氢氧化钠和碳酸钠的混合物为碱性精制剂，对粗铅中砷的碱性精制进行了研究。以砷的去除率为研究对象，考察了反应温度、保温时间、Na2CO3:NaOH、精炼剂用量等因素对砷去除率的影响。最佳实验条件为:反应温度823 K，保温时间60 min, Na2CO3:NaOH: 1:4，精炼剂用量10%，砷的去除率为79.09%。采用XPS、SEM-EDS、XRD、FT-IR等方法对砷的氧化净化机理进行了研究。结果表明:在除砷过程中，粗铅中的砷逐渐被氧和氧化铅氧化，三氧化二砷最终在渣中转化为砷酸钠(Na3AsO4)和砷酸铅(Pb2As2O7);

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.