Production manner null of the cement non content monolithic refractory which uses the cement non content monolithic refractory raw materials and these

摘要

PURPOSE:To obtain the subject refractory with enhanced corrosion resistance to chemical attack by molten slag, etc., and to fine resistance by adding a small amount of a dispersing agent to a refractory composition composed of an aggregate, intermediate powder and fine powder as the refractory composition and one or more ultrafine powders such as silica and hydraulic alumina having a prescribed grain diameter. CONSTITUTION:The objective cementless monolithic refractory (I) obtained by preparing a refractory material, composed of an aggregate, intermediate powder and fine powder, e.g. bauxite or a high purity alumina, alone or as mixture, further preparing a refractory composition (I') composed of =60wt.% aforementioned refractory material (I), 2-20wt.% ultrafine powder composed of one or more of silica, alumina, etc., or chromite and 2-10wt.% hydraulic alumina, contained in the above-mentioned ultrafine powder and having 3-15mum average grain diameter and then adding 0.2wt.% dispersing agent to the aforementioned refractory composition (I'). Low-melting compounds are prevented from the forming by the absence of the cement and hot characteristics such as corrosion, fire resistance, high-temperature strength, etc., are improved by combination of the hydraulic alumina and dispersing agent.