Effects of Coal Blend Type and Preheating Temperature in Coal Rapid Preheating Process on Coke Strength
2004 Volume 90 Issue 9 Pages 656-660
Details
2004 Volume 90 Issue 9 Pages 656-660
In order to develop a coal preheating process, the effects of coal type and preheating conditions on coke strength were investigated. The blended coal of poor-coking coal 50% and coking coal 50% were preheated rapidly and carbonized by laboratory scale test. The following results were obtained.
( 1 ) As a result of investigation of three kind of poor-coking coal, the rapid preheating treatment improves coke strength irrespective of coal type.
( 2 ) It was found that rapid preheating treatment of coal improves coke strength in the case of coal blend which consists of six kind of coal.
( 3 ) The preheating condition to raise the coke strength has been revealed as follows; first of all, coal has to be heated up to 330-400°C; secondly, it is nessesally to prevent fault heating of coal over 400°C.
