... is water-cooled. Its inner layer is in a dimension of 1100×680×240mm, of fixed water-jacket ... cast iron plates, which are then lined with a layer of asbestos sheets, then five layers of refractory ... than the furnace bottom. After copper melt flows out, a little amount of copper melt remains over the bottom ... one is compressed air for oxidation operation, at a capacity of 12M3/min and pressure of 4kg/mm ...