I "know" that holding brass or bronze at high temp burns off the low
melting zinc, tin, and lead and it is not recommended that brass or bronze
scrap be melted into ingots per one site I checked out.
None the less
1. Is it better (more consistant results) to bring the first batch of
metal up from cold or to heat the crucible and furnace to near the final
melt temp and add the metal at that time?
2. If it is desired to add tin to bronze or zinc to brass, how and when
should this be done? Pellets or other bits of low melt metal to molten
alloy? Cold mixing bits of both ingredients and heat mix? Lower temp metal
melted and higher temp added?
My basic stock at this point is surplus keys and what I am making is
goblet stems to blow glass into and molds and tools.
http://users.ticnet.com/mikefirth/castgobl.htm#CASTGOB

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Mike Firth
Hot Glass Bits Furnace Working Website
http://users.ticnet.com/mikefirth/hotbit46.htm Latest notes