Method and smelting furnace for processing high-iron multi-metal zinc concentrate

A zinc concentrate and multi-metal technology, applied in the direction of process efficiency improvement, photographic technology, instruments, etc., can solve the problems of large power consumption and reduction coal, large coke consumption, low smelting recovery rate, etc., to achieve reduction of reduction coal Consumption, elimination of interference from impurities, and the effect of process optimization
CN104060089AActive Publication Date: 2014-09-24LAIBIN CHINA TIN SMELTING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LAIBIN CHINA TIN SMELTING
Publication Date
2014-09-24

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Abstract

The invention relates to a method and a smelting furnace for processing a high-iron multi-metal zinc concentrate. The method comprises the following steps of: adding the zinc concentrate which contains the following components in percentage by weight: 16%-24% of Fe, 0.02-0.40% of In, 0.2%-2.0% of Cu, 0.004%-0.04% of Ag and 36%-48% of Zn to the smelting furnace, successively carrying out three processes including oxygen-enriched oxidation smelting, weak reduction smelting and strong reduction smelting to product sulfur dioxide fume, a copper-silver alloy, smelting slag and zinc-indium smoke dust, wherein the sulfur dioxide fume is used for preparing sulfuric acid, the smelting slag is externally sold, the copper-silver alloy is separated to extract copper and silver, and the zinc-indium smoke dust is subjected to neutral leaching to obtain a neutral leaching solution and neutral leaching residues; producing electrolytic zinc through the neutral leaching solution according to a conventional process; carrying out two-stage acid counter current leaching on the neutral leaching residues to obtain a low-acid leaching solution and high-acid leaching residues; returning the high-acid leaching residues to the smelting furnace for smelting, producing fine indium by using the low-acid leaching solution according to a conventional P204 extraction process, and returning extraction raffinate to neutral leaching. The method disclosed by the invention has the advantages of short process flow, high production efficiency, low production cost, good integrated recovery and clean and environment-friendly production process.
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Description

technical field

[0001] The invention relates to the technical field of non-ferrous metal smelting, in particular to a method and a smelting furnace for processing high-iron polymetallic zinc concentrate. It is suitable for processing high-iron polymetallic zinc concentrates containing Fe16-24%, In0.02-0.40%, Cu0.2-2.0%, Ag0.004-0.04%, Zn36-48%. Background technique

[0002] At present, high-iron polymetallic zinc concentrates containing Fe16-24%, In0.02-0.40%, Cu0.2-2.0%, Ag0.004-0.04%, Zn36-48% are processed to extract zinc and recover various valuable There are three main methods of metal treatment:

[0003] The first treatment method is to use the conventional leaching wet process. The process adopts "roasting and desulfurization of zinc concentrate fluidized furnace--two-stage countercurrent leaching of zinc calcined sand with neutral and low acidity--extraction of copper and cadmium by replacement of medium and supernatant solution--production of electrolytic zinc by ...

Claims

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