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How Metallurgical Coke Quality Can Influence Blast Furnace Permeability
Blast furnace permeability describes how readily gases move through the solid burden.
Coke contributes to the physical structure of the burden because it is a relatively large and strong component of the furnace charge.
However, coke can degrade during handling and high-temperature reaction.
The resulting fines can change the particle-size distribution and void structure of the burden.
For this reason, buyers commonly examine M40, M10, CSR, CRI and coke size when evaluating blast furnace coke.
Chemical composition is also important because fixed carbon, ash and sulfur contribute to the overall material balance.
The exact relationship between coke quality and furnace permeability depends on furnace design, burden composition and operating conditions.
Therefore, buyers should avoid claiming that one coke parameter alone determines furnace permeability.
A more useful approach is to evaluate the complete coke quality profile and its consistency over time.
Keywords: blast furnace permeability, coke quality, metallurgical coke, coke degradation, coke size, M40 M10, CSR CRI, blast furnace coke.
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