The Effect of Deposit Temperature on the Catalytic SO₂-to-SO₃ Conversion in a Copper Flash Smelting Heat Recovery Boiler

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Juho Lehmusto, Emil Vainio, Tor Laurén, Mari Lindgren
Publisher: Springer
Publication year: 2018
Journal: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Journal acronym: Metall and Materi Trans B
Volume number: 49
Issue number: 1
Start page: 434
End page: 439
eISSN: 1543-1916


The aim of the work was to study the catalytic role of copper flash smelter deposit in the SO2-to-SO3 conversion. In addition, the effect of process gas temperature at 548 K to 1173 K (275 °C to 900 °C) on the amount of SO3 formed was addressed both in the absence and presence of genuine copper flash smelter deposit. The SO3 conversion rate changed as a function of process gas temperature, peaking at 1023 K (750 °C). A dramatic increase in the SO2-to-SO3 conversion was observed when process dust was present, clearly indicating that process dust catalyzes the SO2-to-SO3 conversion. Based on these results, the catalytic ability of the deposit may lead to sulfuric acid dew point corrosion.

Last updated on 2020-25-02 at 06:33