Optimisation of the design of pulverised coal injection lances: From concept to full scale implementation at bluescope steel's BF6

Daniel Maldonado, Paul Zulli, Peter Austin, Mark Walsh, John Mathieson, Baoyu Guo, Aibing Yu, Harold Rogers

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

Pulverised coal injection started at BlueScope Steel's Port Kembla blast furnaces in 2002. With significant economic advantages to reduce consumption of coking coal via increasing the quantity of pulverised coal injected to the blast furnaces, a three-dimensional numerical model of the blowpipe/tuyere/raceway has been developed. The model has been applied in various plant-specific investigations of blast parameters, and more recently in the development of alternate coal injection lance tip geometries. The designs with the highest potential for increasing coal burnout included swirl and high dispersive tip designs. The reduction in char load entering the furnace for the best performing alternate designs was due to an increase in coal dispersion compared with the conventional design. Afull-scale trial of the swirl lance design was carried out at Port Kembla's BF6 in mid-2008. The trial delivered promising results, with PCI rates maintained. This was despite unrelated changes to the coke ash content and the burden mix fed to the furnace, which would normally reduce furnace permeability.

Original languageEnglish
Pages793-799
Number of pages7
Publication statusPublished - 1 Dec 2009
Externally publishedYes
Event5th International Congress on the Science and Technology of Ironmaking, ICSTI 2009 - Shanghai, China
Duration: 20 Oct 200922 Oct 2009

Conference

Conference5th International Congress on the Science and Technology of Ironmaking, ICSTI 2009
CountryChina
CityShanghai
Period20/10/0922/10/09

Keywords

  • Char burnout
  • Coal combustion modelling
  • Injection lance tip design

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