Apparatus for coating rust proofing film on workpieces

The present invention relates to a rust-preventive coating film processing apparatus for coating a rust-preventive film on the surface of the hearth curb casting also blood. The invention consists of a dry, the heating device, a hot air circulation apparatus, the waste heat recovery device and the latent heat recovery apparatus. Drying furnace is the inlet and the blood also has an outlet for out a hearth curb casting, towards the outlet from the inlet warm-up, and is present yeolbu, cooled added one after another configuration, the pre-heating section exit from the inlet to bring the taker also blood that is rust preventive coating toward the dry area and the blood for the drying of the corrosion inhibitor also is divided into pre-heating zone for pre-heating of the hearth curb casting, and is arranged in the yeolbu and latent heat recovery zone for the recovery of latent heat from the blood is also taker between the cooling section. Heating device and supplies the heated air to form a rust preventing film by curing the corrosion inhibitor in the yeolbu. A hot-air circulation unit to supply hot air to the hot air discharged from the pre-heating zone, discharged from the pre-heating zone to the preheating zone and the drying zone. And a waste heat recovery device is a hot-air circulator; To recover the heat of the hot air discharged from the drying zone is supplied to the hot air circulated by a hot air circulator. Latent heat recovery apparatus is to recover the latent heat in the latent heat recovery zone from FIG taker blood is provided to supply the hot air which is circulated by a hot air circulator. According to the present invention, there is an effect that the preheating portion is divided into a drying zone and preheating zone and also prevents oxidation of the hearth curb casting liquid and condensing poor blood due to dew condensation, it can greatly improve the energy efficiency of the drying furnace.