Method for thermally regenerating spent acid

Method for thermally regenerating spent acid

A process is provided for the thermal decomposition of contaminated sulfuric acid, which was obtained from the scrubbing of sulfur dioxide contaminated gases created in the pyrometallurgical production of metals. The contaminated sulfuric acid is concentrated to obtain a H2SO4 content of 70% to 80%,...

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Hauptverfasser: JOHANNES HOLMI, JARI OJALA, JAAKKO POIJARVI, ANTTI JALONEN
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Sprache:eng
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CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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creator JOHANNES HOLMI
JARI OJALA
JAAKKO POIJARVI
ANTTI JALONEN
description A process is provided for the thermal decomposition of contaminated sulfuric acid, which was obtained from the scrubbing of sulfur dioxide contaminated gases created in the pyrometallurgical production of metals. The contaminated sulfuric acid is concentrated to obtain a H2SO4 content of 70% to 80%, wherein, during the concentration step, a portion of the metal components, such as arsenic component, zinc sulfate, cadmium sulfate and copper sulfate, as well as halogens, are removed from the sulfuric acid. The concentrated and purified sulfuric acid is fed into the exhaust shaft of a smelting furnace so that the heat of the smelting furnace exhaust gases thermally decomposes the sulfuric acid into sulfur dioxide, water and oxygen.
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subjects CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
title Method for thermally regenerating spent acid
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