confused

[oldskoolron]

ok so you know i have a furnace an have done some melting an casting of ally but yest i thought id try to melt some brass for fun an also to learn but my son said to me [reminded me ] that itll take alot of heat to melt brass so all good ..what to use as a crusible i didnt want to use my ally one so found a cast iron camp bowl i put it in with the brass an waited for 50 mins the bowl was glowing orange an so were the walls of furnace but brass still sitting there solid .i did notice alot of yellowish stain in furnace also a small bit smoke from the peep hole in top when heating .is it wrong to melt the brass in cast iron an would there be a reaction between both
cheers in advance for ur opinions