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Coal Coking Coal Coke

2019731 Ash fusion temperature AFT In coking coals higher AFT is needed and it should be 1450oC minimum. AFT in coking coals is to be higher than coking temperature. Gray king coke type The value of the Gray king is to be G 5 minimum in coking coals. For soft coking coal the limit of Gray king value is G min.

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