Preparation method of refractory material for low-aluminum ultralow-porosity chlorination furnace

The preparation method comprises the following steps: by taking high-potassium low-aluminum mullite, common low-aluminum mullite and fused quartz as aggregates, 325-mesh low-aluminum raw materials and binding clay as a matrix, mixing by an edge runner mill, ageing and mechanically pressing; and after drying the green body, sintering the green body in a high-temperature kiln under an oxidizing atmosphere at the highest sintering temperature of 1380-1480 DEG C. Due to the existence of the potassium-containing liquid-phase annular belt, the surfaces of the fused quartz fine particles are continuously dissolved at high temperature, cristobalite is avoided, and overall sintering is promoted. The low-aluminum raw material in the matrix is subjected to high-temperature calcination, so that a cristobalite phase exists between mullite crystals, and the volume effect caused by high-temperature sintering phase change is effectively relieved. By introducing the special low-aluminum raw material, the content of aluminum o