Homemade furnace refractories The refractory mix is composed of Portland cement (1.5 parts), silica sand (2 parts), perlite (1.5 parts) and fireclay (2 parts). The first three components are mixed together thoroughly. I used a 1-gallon bucket to measure the parts. Less than one bag of perlite was necessary for the bucket furnace and I had about a gallon and a quarter of refractory left over.
Furnace Waste Oil Conversion by Gadget -- Homemade furnace waste oil conversion constructed by replacing the propane burner with a homemade oil burner using a brass valve and fittings. http://www.homemadetools.net/homemade-furnace-waste-oil-conversion