Procedure for refining refractory molded bodies. (Machine-translation by Google Translate, not legally binding)

摘要

Process for refining refractory molded bodies, especially bricks, characterized in that a bauxite powder is heated, with a heating rate of 20 to 50º c/hour, up to a temperature of 950 to 1100º c, it is maintained for 10 to 15 hours at this temperature, then cooled to room temperature, milled and sieved through a mesh size sieve of 0.4 to 1 mm; 40 to 60% by weight of bauxite powder, 60 to 40% by weight of metal capable of diffusion and 1 to 6% by weight of chloride are added, and the mixture is mixed to form a homogeneous powder; the homogeneous powder is calcined at a temperature of 950 to 1100ºC for 22 to 26 hours, cooled, sieved and crumbled for the production of a base powder; 10 to 20% by weight of metal capable of diffusion and 0.5 to 3% by weight of chloride are added to the base powder and the mixture is thoroughly removed to form a homogeneous powder in order to produce an active powder; and finally the molded bodies are introduced into a bed of the active powder and mixed with it in an oxygen-free chamber at a temperature of 900 to 1100ºC for 18 to 36 hours. (Machine-translation by Google Translate, not legally binding)