Dissolution of carbon from coke and char in liquid Fe-C alloys

Journal Title: Archives of Materials Science and Engineering - Year 2018, Vol 1, Issue 92

Abstract

Purpose: The aim of this paper was to study dissolution of carbon from carbonaceous materials of different origin with different morphology, microtexture and microstructure in the liquid Fe-C alloys. Design/methodology/approach: The dissolution of carbon from coke, char and glassy carbon in the molten Fe-C alloy (initial carbon concentration 2.46 wt.%) at 1350°C was measured and compared with that from graphite. The dissolution of carbon from demineralised coke and char in the Fe-C solution was also examined to study the effect of mineral matter on the carbon dissolution. Findings: The concentration of carbon in the Fe-C solution dissolved from graphite was higher than that from coke and char. Demineralisation of coke and char had a significant effect on the carbon dissolution. The concentration of carbon dissolved from demineralised coke and char in the Fe-C alloy approached the solubility of graphite in this alloy under the same conditions. Results obtained in this work confirmed that ash has a strong effect on the carbon dissolution. Research limitations/implications: Investigations in this paper were conducted at 1350°C. At higher temperatures; (1) the degree of coke and char graphitisation increases changing the microstructure of carbonaceous materials; (2) the ash can melt, and (3) some of the metal oxides in the ash can be reduced by carbon to the metal phase, thereby weakening the effect of ash on the carbon dissolution. Demineralisation of coke was incomplete; it reached 70-80% with some effect on the carbon dissolution. The effect of ash composition and further coke demineralisation on the carbon dissolution at higher temperature will be investigated in the future study. Originality/value: This study demonstrated that dissolution of carbon from coke and char was strongly affected by ash. Reactions of dissolution of carbon from coke and char in liquid Fe-C alloy reached a steady state within 1-2 hours. In this state, the coke/char – metal system was far from equilibrium. The “apparent” activity which can be assigned to carbon in the steady state is below one for graphite with significant implications for metallurgical processes.<br/><br/>

Authors and Affiliations

X. Xing, S. Jahanshahi, J. Yang, O. Ostrovski

Keywords

Related Articles

Friction stir processing of the AZ91 magnesium alloy with SiC particles

Purpose: Purpose The main purpose of the research was friction modification by means ofmaterial stirring (FSP – Friction Stir Processing) of the surface layer of the AZ91 magnesiumalloy with SiC particles.Design/methodol...

Influence of plastic deformation temperature on the structure and mechanical properties of low-alloy copper alloys with Co, Ni and B

Purpose: This work presents the influence of chemical composition and plastic deformation temperature of CuCoNi and CuCoNiB as well as CuCo2 and CuCo2B alloys on the structure, mechanical properties and, especially on th...

The properties of experimental silicones reinforced with silica fillers for dentistry

Purpose: Silicone materials crosslinked during the hydrosilylation reaction are common indental prosthetics and dentistry. These materials are characterized by a relatively very goodproperties. However, one of the fundam...

Chromous capacities of ferrochromium and matte smelting slags

Purpose: of this paper is to extend the slag capacity concept to sparingly soluble cationic species encountered for example in matte smelting and ferrochromium processing in terms of chromous capacities. Design/methodolo...

Crack resistance of tool steels corresponding with the chemical composition of their matrices

Purpose: of the presented investigations was showing that the crack resistance of tool steels depends on their hardenability and phase transformations occurring in the quenched matrix at tempering...

Download PDF file
  • EP ID EP389658
  • DOI 10.5604/01.3001.0012.5508
  • Views 72
  • Downloads 0

How To Cite

X. Xing, S. Jahanshahi, J. Yang, O. Ostrovski (2018). Dissolution of carbon from coke and char in liquid Fe-C alloys. Archives of Materials Science and Engineering, 1(92), 22-27. https://europub.co.uk/articles/-A-389658