Mixing molding sand (greensand) Based on some of the emails I get there are plenty of people having trouble with their molding put this page together to illustrate just how easy it is to make a small batch of greensand for your personal foundry.
Either type crucible can be used for melting aluminum, brass, or grey iron. However, different metals should not be melted in the same crucible. This practice will cause contamination of each melt and it will be very difficult to get good castings. DO NOT use "any size" crucible in your furnace. Use the size for which the furnace was designed.