首页|Effluent valorization in copper hydrometallurgy plant

Effluent valorization in copper hydrometallurgy plant

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<![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="sp0095" view="all">Copper is commonly produced by hydrometallurgical processes. The production of this metal results in the formation of emissions (unwanted solids, liquids and gases). In this paper, an effluent from a Cu producer company is valorized by means of Fe and Cu recovery.</ce:simple-para><ce:simple-para id="sp0100" view="all">In the current process, an effluent from the secondary solvent extraction (secondary raffinate) was sent to neutralization plant to be discharged. In this paper a modification of the process is proposed. The secondary raffinate was contacted with TP207 resin for Fe<ce:sup loc="post">3+</ce:sup>and Cu recovery. Metals were eluted from the resins using another real effluent (primary raffinate, effluent from the primary solvent extraction) from the same plant.</ce:simple-para><ce:simple-para id="sp0105" view="all">Experiments for the uptake and elution were carried out in batch and in columns. The effect of pH, resin dosing, and temperature onto metals retention are analyzed. Retention efficiencies (loading capacities) were 50.1% (8.1mg·g<ce:sup loc="post">?1</ce:sup>) for Cu and 54.8% (23.2mg·g<ce:sup loc="post">?1</ce:sup>) for Fe<ce:sup loc="post">3+</ce:sup>under the optimal operational conditions (pH=0.45 and<ce:italic>T</ce:italic>=65°C). These values were confirmed in column tests. It is possible to recover Fe<ce:sup loc="post">3+</ce:sup>and Cu from the secondary raffinate, leaving most of Fe<ce:sup loc="post">2+</ce:sup>and other elements in solution. The experimental affinities that TP207 showed are: Cu>Fe<ce:sup loc="post">3+</ce:sup>>Fe<ce:sup loc="post">2+</ce:sup>>Zn.</ce:simple-para><ce:simple-para id="sp0110" view="all">The elution of Fe and Cu was quantitatively achieved with concentrated H<ce:inf loc="post">2</ce:inf>SO<ce:inf loc="post">4</ce:inf>solution. When acidified primary raffinate was used as eluting solution, an enriched solution containing 14.3g Cu·L<ce:sup loc="post">?1</ce:sup>, 20.3g Fe<ce:sup loc="post">2+</ce:sup>·L<ce:sup loc="post">?1</ce:sup>, and 18.6 de g Fe<ce:sup loc="post">3+</ce:sup>·L<ce:sup loc="post">?1</ce:sup>was obtained. This enriched primary raffinate can be reintroduced in the process as leaching solution.</ce:simple-para><ce:simple-para id="sp0115" view="all">So, after the modification of the process, using secondary raffinate as loading solution and acidified primary raffinate as eluting solution, the ion-exchange stage could substitute the external FeSO<ce:inf loc="post">4</ce:inf>addition. In addition, 30–80kgCu·h<ce:sup loc="post">?1</ce:sup>are reintroduced in the process.</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="graphical" xml:lang="en" view="all"><ce:section-title id="st0010">Graphical abstract</ce:section-title><ce:abstract-sec id="as0010" view="all"><ce:simple-para>Display Omitted</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="ab0015" class="author-highlights" xml:lang="en" view="all"><ce:section-title id="st0015">Highlights</ce:section-title><ce:abstract-sec id="as0015" view="all"><ce:simple-para id="sp0125" view="all"><ce:list id="l0005"><ce:list-item id="li0005"><ce:label>?</ce:label><ce:para id="p0005" view="all">Copper hydrometallurgy plant</ce:para></ce:list-item><ce:list-item id="li0010"><ce:label>?</ce:label><ce:para id="p0010" view="all">Secondary raffinate valorization by ion-exchange</ce:para></ce:list-item><ce:list-item id="li0015"><ce:label>?</ce:label><ce:para id="p0015" view="all">Enriched solution contai

Ion exchangeFe recoveryEffluent valorizationProcess modificationCopper refinery

F. Alvarez-Martin、N. Moreno Bermejo、Y. Luna Galiano、C. Leiva、L.F. Vilches、F. Arroyo Torralvo

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Higher Technical School of Engineering, Universidad de Sevilla

Universidad de Sevilla

2017

10.1016/j.minpro.2017.10.006

International Journal of Mineral Processing

International Journal of Mineral Processing

SCI
ISSN：0301-7516
年,卷(期)：2017.169
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