Molten aluminum permeation resistant refractory brick and preparation method thereof

The invention discloses a molten aluminum permeation resistant refractory brick and a preparation method thereof. The molten aluminum permeation resistant refractory brick comprises the following components in parts by mass: 30-40 parts of a 3-1mm sintered high aluminum material, 15-25 parts of a 1-0mm sintered high aluminum material, 20-30 parts of alumina micro powder, 5-10 parts of clay, 2-5 parts of a magnesium-aluminum complex binding agent and 2-5 parts of boron nitride. By using the magnesium-aluminum complex binding agent, the compactness in the forming process is enhanced, and the permeability resistance of molten aluminum is greatly improved; the use temperature of 1150 DEG C or above is achieved, the requirements of the current aluminum smelting industry are met, the actual production problem is solved, the refractory brick replacement frequency is reduced, and the use cost of customers is saved; and through low-temperature treatment preparation, the energy consumption is greatly reduced, the green