Uniform Bulk Density for Calcined Petroleum Coke

Aluminium smelters are tightening bulk density specifications for Calcined Petroleum Coke while refiners are sacrificing green coke densities at the cost of outputs. Previously, Apparent Density using mercury was popular for defining CPC density. But after AD testing was discontinued owing to environmental issues arising out of mercury usage, each smelter has come out with its own Bulk Density measurement method and specs. The industry specifies Vibrated Bulk Density, Tapped Bulk Density and that too, on a different size fraction viz. (1–2) mm, (−8 + 14) mesh, (−20 + 35) mesh, crushed and uncrushed particles etc. The calciners are confused and GOA CARBON LTD. has made an attempt to analyze various Bulk Densities on different size fractions using crushed/uncrushed basis, to explore, if there exists, a co-relation internally, among all the densities and in particular with mercury AD.