首页|Effect of typical impurities for the formation of floating slimes in copper electrorefining
Effect of typical impurities for the formation of floating slimes in copper electrorefining
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
<![CDATA[<ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0005" xml:lang="en" view="all" class="author"><ce:section-title id="st0005">Abstract</ce:section-title><ce:abstract-sec id="as0005" view="all"><ce:simple-para id="sp0085" view="all">In electrorefining, Group 15 impurities arsenic, antimony and bismuth, may precipitate within the bulk electrolyte as floating slimes and contaminate the copper cathodes. In order to determine the impurity specific thresholds related to the formation of suspended solids, synthetic copper electrorefining electrolytes with different concentrations of arsenic, antimony and bismuth were investigated by a continuous filtration method. The amount and composition of the floating slimes obtained were evaluated in terms of the initial impurity concentrations present in the synthetic electrolyte. As a result, the specific influence of arsenic, antimony and bismuth on the floating slime formation was ascertained. The results suggest that there is an upper limit in electrorefining electrolytes for antimony (Sb) of 800mg/L for floating slime formation, although the limit for Bi was less clear. Furthermore, the structure of the synthetic floating precipitates produced were analyzed using both SEM-EDS and XRD and showed typical amorphous structure of floating slimes with particle size of approximately 25μm and predicted composition of BiAsO<ce:inf loc="post">4</ce:inf>, SbAsO<ce:inf loc="post">4</ce:inf>, Sb<ce:inf loc="post">2</ce:inf>O<ce:inf loc="post">3</ce:inf>and Bi<ce:inf loc="post">2</ce:inf>O<ce:inf loc="post">3</ce:inf>.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0010" class="author-highlights" xml:lang="en" view="all"><ce:section-title id="st0010">Highlights</ce:section-title><ce:abstract-sec id="as0010" view="all"><ce:simple-para id="sp0090" view="all"><ce:list id="l0005"><ce:list-item id="li0005"><ce:label>?</ce:label><ce:para id="p0005" view="all">Floating slime formation is significantly affected by antimony concentration in electrolyte</ce:para></ce:list-item><ce:list-item id="li0010"><ce:label>?</ce:label><ce:para id="p0010" view="all">Results suggest a threshold limit of [Sb] ≥800 mg/L for floating slime formation.</ce:para></ce:list-item><ce:list-item id="li0015"><ce:label>?</ce:label><ce:para id="p0015" view="all">As concentration in the electrolyte influences the level of antimony arsenate in the floating slime.</ce:para></ce:list-item><ce:list-item id="li0020"><ce:label>?</ce:label><ce:para id="p0020" view="all">Bi concentration in the precipitate is independent of Bi solution concentration and can result from the adsorption of Bi oxide on other floating compounds.</ce:para></ce:list-item></ce:list></ce:simple-para></ce:abstract-sec></ce:abstract>]]>
Arif Tirto Aji、Jari Aromaa、Benjamin P. Wilson、Mari Lundstr?m、Shila Jafari、Mikko Kiviluoma、Taina Kalliom?ki、Elisabeth Klindtworth
展开 >
Laboratory of Hydrometallurgy and Corrosion, Department of Chemical and Metallurgical Engineering (CMET), School of Chemical Engineering, Aalto University
Herterogeneous Catalysis and Technical Chemistry, Institute of Technical and Macromolecular Chemistry (ITMC), RWTH Aachen University
NSTL
Elsevier
