The invention in one form the inner wall of a refractory material to seal the in and, (爐) and formed in to the inlet on top of the (爐) to provide the hot air of the closed door, the furnace high temperature which comprises the opening and closing window, and a hot-air pipe, and the spent resin and the guide form a metal tray for receiving the carbon to be mounted to the multi-stage heater which is mounted under the guide formation to provide radiant heat to the metal tray rods, from a hot air pipe the incoming hot air which is formed to be passing through the upper surface of the metallic tray is formed in multiple stages from the top respectively provided to the hot air in a row in a metal tray at the bottom through the bottom hole and, the metal tray back into the hot air coming from the hole It is configured with passages for switching the direction to pass through, to pass through a metal tray that is mounted in multiple stages and to pass through the bottom of the (爐) to pass through, forming a heated air and vortex moving in the combustion discharge pipe vortex tile, the combustion discharge pipe control plate is configured to protrude to the inner wall to be in accordance with the configuration with a septum for delaying the moving speed of the combustion and pyrolysis and combustion object moving in the combustion discharge pipe adjust the temperature of the hot air temperature and the heater and to control the time the combustion automatically in is decomposed to combustion and the carbon paper and the waste water by high temperature provides an apparatus which can recover the precious metal.