Preparation method of spinel-corundum-aluminate lightweight refractory material

The invention discloses a preparation method of a spinel-corundum-aluminate light-weight refractory material, which comprises the following steps: firstly, simulating a microstructure of sintered magnesia, and constructing a multiphase material which takes magnesium aluminate spinel as a main crystalline phase and calcium aluminate as an intergranular phase and a secondary crystalline phase; and the spinel-calcium aluminate-calcium dialuminate multiphase material with controllable crystal phase distribution and pore composition is prepared. And then, by taking the multiphase material as an aggregate and corundum-spinel as a matrix, carrying out batching, compression molding and high-temperature firing according to a certain grain composition. By introducing the spinel-calcium aluminate-calcium dialuminate multiphase material and by means of calcium ion component migration, the spinel-corundum-aluminate light-weight refractory material with microporous aggregate and densified matrix can be prepared, and the no