Abstract: The examples described herein provide methods and equipment for an anti-oxidation spraying on a steel billet. In some examples, when the billet at the temperature of 400° C.-1000° C. enters the predetermined spraying region, a plurality of anti-oxidation spraying devices are used to perform an anti-oxidation spray on the billet in two or more directions, thereby forming directly an anti-oxidation coating on the steel billet at 400° C.-1000° C. By using the example method and equipment described herein, on-line spraying of anti-oxidation coating on the steel billet can be performed under high-temperature condition, thereby reducing an oxidation burning loss rate of the steel billet.

Abstract: In certain examples, this invention provides an inorganic composite binder with high-temperature resistance comprising 5-12% of aluminum hydroxide, 15-35% of phosphoric acid, 0.1-1% of rare earth oxide, 5-20% of silica sol, 1-15% of polyaluminum phosphate, 1-5% of borax, based on the total weight of said binder, and the rest being water, and a method for producing the same. The binder of the example can be used in temporary protective coating layer such as the high temperature coating and the high temperature antioxidation coating layer during the heat treatment of the metal workpiece, can make it possible to form an antioxidation coating layer immediately upon directly spraying the coating onto the substrate surface of the metal at high temperature of 400-1000° C.

Abstract: In certain examples, this invention provides an inorganic composite binder with high-temperature resistance comprising 5-12% of aluminium hydroxide, 15-35% of phosphoric acid, 0.1-1% of rare earth oxide, 5-20% of silica sol, 1-15% of polyaluminium phosphate, 1-5% of borax, based on the total weight of said binder, and the rest being water, and a method for producing the same. The binder of the example can be used in temporary protective coating layer such as the high temperature coating and the high temperature antioxidation coating layer during the heat treatment of the metal workpiece, can make it possible to form an antioxidation coating layer immediately upon directly spraying the coating onto the substrate surface of the metal at high temperature of 400-1000° C.

Abstract: The examples described herein provide methods and equipment for an anti-oxidation spraying on a steel billet. In some examples, when the billet at the temperature of 400° C.-1000° C. enters the predetermined spraying region, a plurality of anti-oxidation spraying devices are used to perform an anti-oxidation spray on the billet in two or more directions, thereby forming directly an anti-oxidation coating on the steel billet at 400° C.-1000° C. By using the example method and equipment described herein, on-line spraying of anti-oxidation coating on the steel billet can be performed under high-temperature condition, thereby reducing an oxidation burning loss rate of the steel billet.

Abstract: The present disclosure relates to an antioxidation coating for steel. In one example, the coating is produced by mixing magnesian mineral, layered silicate, metallurgical solid waste, aluminum powder, organic thickener and inorganic binder including the components of Al2O3, SiO2, MgO, CaO, Fe2O3 or the like with water, and the final coating density is adjusted to 1,100˜1,500 kg/m3 by adding water.

Abstract: The present disclosure relates to an antioxidation coating for steel. In one example, the coating is produced by mixing magnesian mineral, layered silicate, metallurgical solid waste, aluminum powder, organic thickener and inorganic binder including the components of Al2O3, SiO2, MgO, CaO, Fe2O3 or the like with water, and the final coating density is adjusted to 1,100-1,500 kg/m3 by adding water.