Comparing Handling Degradation of Shaft and Rotary Cokes

The blending of shaft and rotary calcined cokesCoke has become relatively common in the aluminum smeltingAluminum smelting industry. One of the widespread concerns with shaft cokeShaft coke is the view it is more “dusty” than rotary cokesRotary coke. This can be an issue when handling shaft cokeShaft coke at storage facilities and when importing/exporting over dock facilities. To understand the relative risk of fugitive dustFugitive dust generation during handling shaft cokeShaft coke, a study was made comparing the degradationDegradation tendencies of shaft cokeShaft coke compared to rotary cokeRotary coke when tested under the same conditions. Tests simulating cokeCoke migration such as from a conveyor or being discharged from a silo (“cokeCoke on cokeCoke”) and cokeCoke dropping such as filling a silo (“cokeCoke impact”) were developed. The results of this study are presented.