Novel glazed energy-saving firebrick

The invention relates to a preparation technique of a novel glazed energy-saving firebrick. The preparation technique is simple and can realize large-scale industrial production. The invention mainly has three technical schemes: (1) the surface of a molded firebrick is directly glazed in a mode of spraying, painting, spin coating or the like, the mass proportion of the glaze is 0.5-10%, the glaze can be divided into high-temperature glaze, moderate-temperature glaze and low temperature glaze, and different types of glaze can be applied according to the particular ambient temperature of the firebrick; the firebrick prepared by the scheme has a glossy surface, can effectively reflect infrared rays to achieve the effect of energy saving, and the application of the surface glaze can obviously reduce the porosity of the firebrick, enhance the heat shock resistance of the firebrick and prolong the service life of the firebrick; (2) glaze is added to the raw material of the unmolded firebrick, the selection of the g