Installation of a Brown Field Slag
Reduction Furnace: State of the Art
Off-Gas Treatment with Dry Gas
Cleaning for SO 2 Capture
Peter Weber, Dirk Behrmann, Thomas Breuer and Rüdiger Margraf
Abstract A new lead slag reduction furnace for the treatment of lead-rich slags from
an existing top submerged lance (TSL) furnace has been installed at the Weser-Metall
(WMG) lead plant in Nordenham, Germany. With the new reduction furnace, the lead
content in the slags is lowered significantly, and lead bullion is produced. A Chinese
side-blowing furnace (SBF) was selected for the reduction, and all plant technology
around the furnace was engineered and supplied by Germany based company Kuettner. The furnace was integrated and further adopted into a Kuettner process concept
to comply with European and clients’ standards. The concept includes an off-gas
treatment layout with a direct connection from furnace to waste heat boiler and controlled forced-air combustion to mitigate accretion formation in the boiler. Due to
environmental requirements, this expansion of the lead operations had to ensure a
decrease of the existing emission footprint of the entire plant. To accomplish this,
Kuettner has installed a flue gas process line for the slag reduction furnace which
integrates several existing emission sources from TSL operations and guarantees
dust emissions below 0.2 mg/Nm
3 and SO 2 values below 250 mg/Nm
3 without the
need for wet scrubbers.
Keywords Lead · Slag reduction · Side-blowing furnace · Off-gas treatment
Introduction and Actual Situation
At the production site of Weser-Metall GmbH (WMG) Nordenham, lead is produced
out of primary and secondary input material. The main unit of this lead production
process is a so-called top submerged lance (TSL) furnace.
P. Weber · D. Behrmann (B) · T. Breuer
Küttner GmbH & Co. KG, Alfredstraße 28, Essen, Germany
e-mail: d.behrmann@kuettner.com
URL: https://www.kuettner.com
R. Margraf
Lühr Filter GmbH, Enzer Str. 26, Stadthagen, Germany
© The Minerals, Metals & Materials Society 2020
A. Siegmund et al. (eds.), PbZn 2020: 9th International Symposium
on Lead and Zinc Processing, The Minerals, Metals & Materials Series,
https://doi.org/10.1007/978-3-030-37070-1_15
187
Reduction Furnace: State of the Art
Off-Gas Treatment with Dry Gas
Cleaning for SO 2 Capture
Peter Weber, Dirk Behrmann, Thomas Breuer and Rüdiger Margraf
Abstract A new lead slag reduction furnace for the treatment of lead-rich slags from
an existing top submerged lance (TSL) furnace has been installed at the Weser-Metall
(WMG) lead plant in Nordenham, Germany. With the new reduction furnace, the lead
content in the slags is lowered significantly, and lead bullion is produced. A Chinese
side-blowing furnace (SBF) was selected for the reduction, and all plant technology
around the furnace was engineered and supplied by Germany based company Kuettner. The furnace was integrated and further adopted into a Kuettner process concept
to comply with European and clients’ standards. The concept includes an off-gas
treatment layout with a direct connection from furnace to waste heat boiler and controlled forced-air combustion to mitigate accretion formation in the boiler. Due to
environmental requirements, this expansion of the lead operations had to ensure a
decrease of the existing emission footprint of the entire plant. To accomplish this,
Kuettner has installed a flue gas process line for the slag reduction furnace which
integrates several existing emission sources from TSL operations and guarantees
dust emissions below 0.2 mg/Nm
3 and SO 2 values below 250 mg/Nm
3 without the
need for wet scrubbers.
Keywords Lead · Slag reduction · Side-blowing furnace · Off-gas treatment
Introduction and Actual Situation
At the production site of Weser-Metall GmbH (WMG) Nordenham, lead is produced
out of primary and secondary input material. The main unit of this lead production
process is a so-called top submerged lance (TSL) furnace.
P. Weber · D. Behrmann (B) · T. Breuer
Küttner GmbH & Co. KG, Alfredstraße 28, Essen, Germany
e-mail: d.behrmann@kuettner.com
URL: https://www.kuettner.com
R. Margraf
Lühr Filter GmbH, Enzer Str. 26, Stadthagen, Germany
© The Minerals, Metals & Materials Society 2020
A. Siegmund et al. (eds.), PbZn 2020: 9th International Symposium
on Lead and Zinc Processing, The Minerals, Metals & Materials Series,
https://doi.org/10.1007/978-3-030-37070-1_15
187