Determination of the specific surface area of cokes and chars for simulated process conditions of blast furnace and smelting reduction routes

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearch

Organisational units

External Organisational units

  • voestalpine Stahl Linz GmbH
  • voestalpine Stahl Donawitz GmbH

Abstract

Specific surface areas of different raw materials play an important role in ferrous metallurgical processes. Coke (for blast furnace process) and char from non-coking coals (for COREX and FINEX process) are the lifelines for smelting reduction ironmaking processes by providing energy for the process and also supporting the burden load. The reactivity of coke and char depends greatly on the inherent surface properties of the parent raw material. The knowledge about the specific surface area not only provides a forecast for its process behavior, but also indicates the evolution of surface properties under process conditions.
The aim of this work is to develop a standard procedure of evaluating the specific surface area of cokes and chars using the BET (Brunauer-Emmett-Teller) analysis method. A standard sampling method for test specimens have been developed for having enhanced reproducibility and overcoming the heterogeneous nature of the test samples. The pore size distribution has been investigated using the BJH (Barrett-Joyner-Halenda) analysis method. The effects of the treatment of samples under different process conditions have also been investigated. The results provide a better understanding of the variation of surface properties (surface area, pore size etc.) among different samples as well as the effect of treatment under various process conditions.

Details

Original languageEnglish
Title of host publicationSCANMET V Proceedings
Publication statusPublished - Jun 2016
EventSCANMET V - 5th International Conference on Process Development in Iron and Steelmaking - Lulea, Sweden
Duration: 12 Jun 201615 Jun 2016

Conference

ConferenceSCANMET V - 5th International Conference on Process Development in Iron and Steelmaking
CountrySweden
CityLulea
Period12/06/1615/06/16