Page issues. Municipal solid waste (MSW), commonly known as trash or garbage in the United States and as refuse or rubbish in Britain, is a waste type consisting of everyday items that are discarded by the public. Garbage can also refer specifically to food waste, as in a garbage disposal; the two are sometimes collected separately.
melting is what you do to a material that is metal, without flux. What you would do with pure PMs. Smelting is what is done to remove impurities from gold and reduce/oxidize other materials out. Since gold does not oxidize borax affects lighter elements that oxidize and rise to the surface.hat you would do with pure PMs. Smelting is what is done to remove impurities from gold and reduce/oxidize other materials out. Since gold does not oxidize borax affects lighter elements that oxidize and rise to the surface.
This includes production of silver, iron, copper and other base metals from their ores. Smelting makes use of heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving just the metal base behind. The reducing agent is commonly a source of carbon such as coke, or in earlier times charcoal.