Asbestos heat-insulating sleeve for submerged nozzle

The utility model provides an asbestos heat-insulating sleeve for a submerged nozzle. The heat-insulating sleeve is a cylindrical body of which the diameter of an upper opening is larger than that of a lower opening; the cross section of the heat-insulating sleeve is a dual-ring body of which the inner ring is a heat-insulating layer, and the outer ring is a protective layer; an adhesive layer is arranged between the heat-insulating layer and the protective layer; and a stainless steel wire suture arranged between the heat-insulating layer and the protective layer is made of aluminum silicate wool in the heat-insulating layer, and asbestos cloth in the protective layer. The utility model has the benefits that the baking temperature of the submerged nozzle reaches 750 DEG C without the heat-insulating sleeve and can reach up to 825 DEG C with the heat-insulating sleeve, and the increase of 75 DEG C indicates very obvious effect. The heat-insulating sleeve adopting the structure has simple and convenient operat