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In an RDO induction furnace, we are trying a new flux recommended by a friend who is supposedly having success with it. The ingredients are: 1# Silica, 1# Lime, 1# Soda Ash, 1# Anhydrous Borax, 400g Baking Soda, 4 teaspoons Potassium Nitrate, and 4 teaspoons Fluorspar. This is mixed 3-1 with our 100-mesh ore and slowly added to the crucible. The problem is that the mixture never allows a high power setting and continuously froths to the point of boiling over -- similar to a vinegar/baking soda reaction (high school volcano). It has taken over an hour and a boil-over to get just 1/3 of the material added. Any ideas of what is wrong?