Boron carbide (B4C) of high hardness, high melting point (2, 450), density (2.52 g · cm - 3) is small, good abrasion resistance, good chemical stability, has been widely used in sapphire grinding at home and abroad Produces in the process of production of fine abrasive boron carbide waste water concentration, due to their small size and low purity, has no abrasive of sapphire At present domestic to boron carbide waste water concentration, there is no effective recycling method, the factory waste piles, not only pollute the environment, also caused the waste of resources.

In order to achieve resource conservation, waste recycling, in this work, with boron carbide wet concentration waste as raw materials, Al powder for sintering additives (its purpose is to reduce the sintering temperature of B4C, improve the fracture toughness of material and density), insulation under different atmosphere by 1, 400, 90 min, the preparation of boron carbide refractories experiment, covered with activated carbon and argon gas can reduce the degree of oxidation of sintered products, carburizing effect of active carbon can inhibit the boron carbide grain coarsening grow up, improve the degree of densification of sintered products.