Low-cost slag ladle heat-insulation separation spray coating and production and use method thereof

The invention relates to a low-cost slag ladle heat-insulation separation spray coating formula and a production and use method thereof, main raw materials are flue gas desulfurization gypsum, fly ash, dolomite mine fly ash, limestone mine fly ash and other industrial solid wastes around a steel mill, and compared with the use of a refractory material raw material, the raw material cost is greatly reduced; meanwhile, the main raw materials do not need to be ground, so that the cost is further reduced. When in use, the components are mixed and stirred at the same time, and after the components are uniformly stirred, the components are continuously stirred for more than 2 hours to obtain the homogeneous spray coating mortar. The spray coating mortar is constructed through a manual gunning machine, a firm high-temperature-resistant and slag-erosion-resistant coating layer is formed on the inner wall of the slag ladle, and the probability that the steel slag and the iron slag adhere to the ladle is remarkably red