Experimental Study of Blast Furnace Hearth Drainage Based on Image Analysis

Weiqiang Liu, Lei Shao, Henrik Saxén*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
34 Downloads (Pure)


A smooth hearth drainage is one of the key requirements for maintaining an efficient blast furnace operation. For achieving this, it is necessary to understand the hearth drainage behavior and the effect of related process parameters. To investigate the drainage, a set of experiments is conducted in a 2D Hele−Shaw model, where the influence of the initial accumulated amount of molten liquids (iron and slag), blast pressure, and slag viscosity on the drainage behavior is studied using water and oil as liquids. To quantify the findings, an image analysis-based algorithm is applied to extract drainage information that is used to analyze the effect of the mentioned process factors on the evolution of the liquid levels and volumes, flow rates, share oil in the outflow, and angle of the interfaces at the outlet. Herein, the implications of the results for the operation of the blast furnace hearth are discussed.

Original languageEnglish
Article number2100142
JournalSteel Research International
Issue number10
Publication statusPublished - 22 May 2021
MoE publication typeA1 Journal article-refereed


  • blast furnaces
  • hearth drainage
  • image analyses
  • iron and slag flow


Dive into the research topics of 'Experimental Study of Blast Furnace Hearth Drainage Based on Image Analysis'. Together they form a unique fingerprint.

Cite this