543results about "Furnace linings" patented technology

A firing furnace comprising: a muffle formed so as to ensure a space for housing a formed body to be fired; a member that constitutes a heat generator and is placed on and / or around the muffle; and a heat insulating layer that contains said muffle and said heat generator inside thereof, wherein a carbon-natured sheet is placed in the vicinity of corner portions of an inner face of said heat insulating layer.

A fire-resistant heat insulating material excellent in resistance to heat, resistance to slag, resistance to molten iron, resistance to wear, and resistance to mechanical impulse is provided. A highly endurable heat insulating material characterized by being provided on the surface of a layer of inorganic heat insulating fibers through the medium of a coating film of surface hardening material with a flame sprayed film of a fire-resistant ceramic substance.

A modular oven, such as a batch process oven, includes a standardized set of self supporting, interconnectable panels which, when assembled, from a self-supporting heat containment shell, free of added structural support members. The present invention is also directed at self-supporting modular oven panels and a method of assembling the panels such as in the expansion or conversion of a first modular oven assembly to a second assembly more conducive to current production requirements.

A carbonaceous refractory material is produced by adding an organic binder to a mixture containing a carbonaceous material comprising a carbonaceous raw material comprising calcined anthracite, calcined coke, artificial graphite or natural graphite or a mixture thereof at 50 to 85% as the principal raw material, alumina particle at 5 to 15%, metal silicon particle at 5 to 15%, and one or two or more of titanium carbide powder, titanium nitride powder and titanium carbonitride powder at 5 to 20% in total, kneading and molding the resulting mixture and baking the molded article under non-oxidizing atmosphere. By using the carbonaceous refractory material as the inner lining material for the side wall and bottom of blast furnace hearth, the consumption of the inner lining material due to the dissolution thereof in melted pig iron can be decreased, and simultaneously, the abrasion due to the flow of melted pig iron can be decreased, which works to prolong the life of the blast furnace.

Provided is a molded inorganic-fiber object which is characterized by being extremely lightweight, being reduced in flying of fibers or a particulate substance from the surface thereof, and being free from problems concerning environmental pollution, such as generation of a harmful substance. The molded object is excellent in terms of thermal shock resistance and mechanical shock resistance and of resistance to high-speed wind erosion, has an excellent balance among material properties, and can be used in various heat insulator applications. The molded inorganic-fiber object comprises inorganic fibers and inorganic binder particles and has at least a pair of regions, a high-fiber-density region and a low-fiber-density region, wherein the ratio of the content of the binder particles in the high-fiber-density region to the content thereof in the low-fiber-density region, as determined by a given method, is 0.5:1 to 5:1 and the inorganic binder particles in the outermost surface of the molded object have a number-average particle diameter, as determined by a given method, of 20-35 [mu]m, the number of the inorganic binder particles therein being less than 15.

A highly zirconia-based refractory suitable for an electric melting furnace, which has a high electrical resistivity and does not exhibit a chipping off phenomenon and which is scarcely susceptible to extraction of components even when in contact with molten low alkali glass and, hence, is less susceptible to cracking during operation. The highly zirconia-based refractory that includes, as chemical components by mass %, from 85 to 95% of ZrO2 in terms of inner percentage, from 3.0 to 10% of SiO2 in terms of inner percentage, from 0.85 to 3.0% of Al2O3 in terms of inner percentage, substantially no Na2O, from 0.01 to 0.5% of K2O in terms of outer percentage, from 1.5 to 3.0% of SrO in terms of inner percentage, and from 0.1 to 2.0% of Nb2O5 and / or Ta2O5 as a value obtained by [(Nb2O5 content)+(Ta2O5 content / 1.66)], in terms of inner percentage.