The spray coating material is mainly composed of aluminum oxide and silicon dioxide, and can be used for converter mouth, ladle, iron ladle, and slag pot. The product's refractoriness is ≥1800°C; density is 1.8±0.2 Kg/cm³; bond flexural strength is ≥3.5 MPa (1500°C*3h); and apparent porosity is ≤40%.