Deposit build-up and corrosion in a copper flash smelting heat recovery boiler

Juho Lehmusto; Daniel Stenlund; Mari Lindgren; Patrik Yrjas

doi:10.1007/s11085-016-9666-4

Deposit build-up and corrosion in a copper flash smelting heat recovery boiler

Juho Lehmusto, Daniel Stenlund, Mari Lindgren, Patrik Yrjas

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

Abstract

The aim of the work was to improve the understanding of deposit formation and corrosion in a copper flash smelting plant, focusing on the effects of process gas temperature (400–900 °C) and heat-transfer surface temperature (160–320 °C) on deposit formation and corrosion rate. The rate of build-up increased as a function of process gas temperature, which was explained by a larger extent of sintering at higher temperatures, resulting in slagging and thus, in better adhesion of particles hitting the surface. The corrosion rate increased as a function of process gas temperature. Iron sulphate (FeSO₄ or Fe₂(SO₄)₃) was found at the interface between the deposit and the corroded metal surface, suggesting that corrosion was induced by sulphuric acid (H₂SO₄) from the reaction between SO₃ (originating from SO₂ in the process gas) and water vapour.

Original language	Undefined/Unknown
Pages (from-to)	199–214
Journal	Oxidation of Metals
Volume	87
Issue number	1-2
DOIs	https://doi.org/10.1007/s11085-016-9666-4
Publication status	Published - 2017
MoE publication type	A1 Journal article-refereed

Keywords

Flash smelting
heat recovery boiler
Deposit build-up rate
Dew point corrosion

Access to Document

10.1007/s11085-016-9666-4

http://link.springer.com/article/10.1007/s11085-016-9666-4

Cite this

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title = "Deposit build-up and corrosion in a copper flash smelting heat recovery boiler",

abstract = "The aim of the work was to improve the understanding of deposit formation and corrosion in a copper flash smelting plant, focusing on the effects of process gas temperature (400–900 °C) and heat-transfer surface temperature (160–320 °C) on deposit formation and corrosion rate. The rate of build-up increased as a function of process gas temperature, which was explained by a larger extent of sintering at higher temperatures, resulting in slagging and thus, in better adhesion of particles hitting the surface. The corrosion rate increased as a function of process gas temperature. Iron sulphate (FeSO4 or Fe2(SO4)3) was found at the interface between the deposit and the corroded metal surface, suggesting that corrosion was induced by sulphuric acid (H2SO4) from the reaction between SO3 (originating from SO2 in the process gas) and water vapour.",

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T1 - Deposit build-up and corrosion in a copper flash smelting heat recovery boiler

AU - Lehmusto, Juho

AU - Stenlund, Daniel

AU - Lindgren, Mari

AU - Yrjas, Patrik

N1 - ook

PY - 2017

Y1 - 2017

N2 - The aim of the work was to improve the understanding of deposit formation and corrosion in a copper flash smelting plant, focusing on the effects of process gas temperature (400–900 °C) and heat-transfer surface temperature (160–320 °C) on deposit formation and corrosion rate. The rate of build-up increased as a function of process gas temperature, which was explained by a larger extent of sintering at higher temperatures, resulting in slagging and thus, in better adhesion of particles hitting the surface. The corrosion rate increased as a function of process gas temperature. Iron sulphate (FeSO4 or Fe2(SO4)3) was found at the interface between the deposit and the corroded metal surface, suggesting that corrosion was induced by sulphuric acid (H2SO4) from the reaction between SO3 (originating from SO2 in the process gas) and water vapour.

AB - The aim of the work was to improve the understanding of deposit formation and corrosion in a copper flash smelting plant, focusing on the effects of process gas temperature (400–900 °C) and heat-transfer surface temperature (160–320 °C) on deposit formation and corrosion rate. The rate of build-up increased as a function of process gas temperature, which was explained by a larger extent of sintering at higher temperatures, resulting in slagging and thus, in better adhesion of particles hitting the surface. The corrosion rate increased as a function of process gas temperature. Iron sulphate (FeSO4 or Fe2(SO4)3) was found at the interface between the deposit and the corroded metal surface, suggesting that corrosion was induced by sulphuric acid (H2SO4) from the reaction between SO3 (originating from SO2 in the process gas) and water vapour.

KW - Flash smelting

KW - heat recovery boiler

KW - Deposit build-up rate

KW - Dew point corrosion

KW - Flash smelting

KW - heat recovery boiler

KW - Deposit build-up rate

KW - Dew point corrosion

KW - Flash smelting

KW - heat recovery boiler

KW - Deposit build-up rate

KW - Dew point corrosion

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DO - 10.1007/s11085-016-9666-4

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