Raw material premixing device, raw material mixing method and steel ladle air brick

The invention relates to the technical field of air brick processing, in particular to a steel ladle air brick which comprises a steel ladle air brick body, the steel ladle air brick body comprises a steel ladle permanent layer and an air brick body, a base is arranged in the steel ladle permanent layer, and a ladle bottom working layer is arranged on the base. An air brick body is arranged in the center of the ladle bottom working layer, a ladle opening working layer, a slag line working layer and a slag line permanent layer are further arranged in the steel ladle permanent layer, the outer portion of the air brick body is further filled with refractory filler, the steel ladle permanent layer is further filled with filler bodies, and the filler bodies are filled with refractory filler. According to the invention, the gaps among the layers are filled with the refractory material, the gaps among the layers are filled with the refractory material, and then the air brick is filled with the filler body, so that o