Method for removing arsenic from high-arsenic lead anode slime

Method for removing arsenic from high-arsenic lead anode slime

The invention provides a method for removing arsenic from high-arsenic lead anode slime. The method comprises the following steps: a, washing to remove fluorine; b, first-stage acid oxygen pressure leaching; c, second-stage acid oxygen pressure leaching; d, arsenic precipitation: alkali is added int...

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Hauptverfasser: YANG DAJIN, LU WENPENG, LI YANLIN, PEI QIFEI, HE ZONGYUN
Format: Patent
Sprache:chi ; eng
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CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator YANG DAJIN
LU WENPENG
LI YANLIN
PEI QIFEI
HE ZONGYUN
description The invention provides a method for removing arsenic from high-arsenic lead anode slime. The method comprises the following steps: a, washing to remove fluorine; b, first-stage acid oxygen pressure leaching; c, second-stage acid oxygen pressure leaching; d, arsenic precipitation: alkali is added into the water washing liquid for arsenic removal treatment, arsenic-removed slag and arsenic-removed water washing liquid are obtained, and the arsenic-removed water washing liquid is returned to the step a for water washing and defluorination; and sodium sulfide is added into the first-section leachate for arsenic precipitation, and arsenic precipitation slag is obtained. According to the technical scheme, the content of As in the high-arsenic lead anode slime is reduced from 39.18% to 1.7% or below in the two-stage arsenic removal anode slime, the arsenic removal rate can reach 96% or above, and efficient removal of arsenic is achieved; particularly, in the treatment process, the generated liquid is fully recycled,
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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title Method for removing arsenic from high-arsenic lead anode slime
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