A laboratory ore roaster gives good conversion of both gas and solid under conditions where axial slugging is observed throughout most of the unit. Estimate roughly the size of a large roaster free of internals that would be able to treat $100$ times as much feed to the same conversion.Laboratory roasterParticles :$\_$ Geldart typedp $=200,$um$\backslash =4$cm$/$s$,$ Gas: uo$=30$ cm$/$ssm $=0\mathrm{.}4$mf$=0\mathrm{.}45$Bed: dt $15$ cm$,$ Lm $=1\mathrm{.}0$ m Large roaster Same uo as the small roaster.