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Microstructure and Properties of Carbon Block Refractories Containing Thermally Oxidized Anthracite for Blast Furnaces

T. Wang, S. Sang, Y. Li, Y. Xu, Q. Wang

Journal of Ceramic Science and Technology, Vol. 9, No. 1 (2018), pp. 85-92

DOI: 10.4416/JCST2017-00081

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Abstract

Carbon block refractories containing thermally oxidized anthracite (TOA) and additives of Al and Si were prepared for use in blast furnaces. The TOA was obtained by treating electrically calcined anthracite (ECA) using the thermal oxidation method. It was then introduced into carbon blocks by partially or totally replacing the ECA raw materials. The microstructure and properties of carbon block refractories heated in a coke bed at 1400 °C were investigated. The results revealed that TOA accelerated the formation of β-SiC whiskers and β-Sialon phases in carbon block refractories because TOA has higher reactivity than ECA. Properties such as the cold compressive strength, mean pore diameter,

Keywords

Thermally oxidized anthracite, microstructure, thermal conductivity, carbon block refractories

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