Anti-carburizing construction process for casting cooling water pipe in blast furnace cooling wall

The invention discloses an anti-carburizing construction process for casting a cooling water pipe in a blast furnace cooling wall, belonging to the technical field of the preparation of the metallurgical machinery. The invention provides an anti-carburizing construction process for casting the cooling water pipe in the blast furnace cooling wall without carburizing on the outer surface of the cooling water pipe and forming a carburizing layer. The anti-carburizing construction process comprises the following steps: bending the cooling water pipe, and derusting the bended cooling water pipe; then spraying an Al2O3 layer of which thickness is no more than 0.10-0.15mm on the outer surface of the cooling water pipe; then painting a water-based zircon powder paint layer of which thickness is no more than 0.2mm on the outer surface of the qualifiedly sprayed cooling water pipe, and drying; and finally embedding the cooling water pipe in a casting mould cavity, assembling the mould and casting the cooling wall, wher