Abstract: An article comprising a) a die core having a plurality of flow paths adapted to flow extrudable material to a plurality of slots including wall slots and skin slots and around a plurality of pins so as to form a honeycomb structure from the extrudable material; and b) a mounting plate adapted to hold the die core in an extrusion system having an opening adapted to allow the extrudable material passed through the die core to exit, an outer portion adapted to mount and hold the die core in place, a flange about the periphery of the opening which seats the die core, an inner surface disposed to partially form the skin slots adapted to allow extrudable material to flow from the skin slots to form the skin of the honeycomb structure; and wherein the die core and mounting plate are comprised of different materials having different wear properties.

Abstract: Acicular mullite bodies are made in two-step firing process in which a green body is converted first to a fluorotopaz and then to acicular mullite. The bodies are contained within an enclosed region of the furnace. A flow of process gas is provided through the enclosed region during the fluorotopaz-forming step. The process gas is introduced into the enclosed region through multiple openings on at least one side of the enclosed region, and withdrawn through multiple openings on another side of the enclosed region. During the acicular mullite-forming step, a flow of purge gas is maintained in the exterior portion of the furnace. This purge gas may be removed by flowing it into the enclosed region of the furnace and out of the furnace from the enclosed region without re-entering the exterior portion for the furnace.

Abstract: An article comprising; a) a die core (10) having plurality of flow paths adapted to flow extrudable material to a plurality of slots (12) and around a plurality of pins (11) so as to form a honeycomb structure from the extrudable material, the honeycomb structure having a skin about its outer surface in the extrusion direction, the slots (12) comprise wall slolts (12) for forming walls of the honeycomb structure and skin slots (16) disposed about an outer periphery of the die core (10) for forming the skin arond the honey-comb structure, the die having an extrusion entrance surface (24) and an extrusion exit surface (13); b) a mounting plate (20) adapted to hold the die core (10) in an extrusion system having an opening (21) adapted to allow the extrudable material passed through the die core (10) to exit the die core (10), an outer portion adapted mount and hold the die core (10) in place, and a flange (22) about the periphery of the opening (21) which seats the die core (10) and is disposed about the outer

Abstract: Acicular mullite bodies are made in two-step firing process in which a green body is converted first to a fluorotopaz and then to acicular mullite. The bodies are contained within an enclosed region of the furnace. A flow of process gas is provided through the enclosed region during the fluorotopaz-forming step. The process gas is introduced into the enclosed region through multiple openings on at least one side of the enclosed region, and withdrawn through multiple openings on another side of the enclosed region. During the acicular mullite-forming step, a flow of purge gas is maintained in the exterior portion of the furnace. This purge gas may be removed by flowing it into the enclosed region of the furnace and out of the furnace from the enclosed region without re-entering the exterior portion for the furnace.

Abstract: This invention relates to a process burner for feeding a carbonaceous slurry, an oxygen-containing gas, fuel gas, and optionally, temperature moderators contemporaneously and selectively into a pressurized partial oxidation zone. The process burner feature internal formation of a uniform dispersion of the carbonaceous slurry and the oxygen-containing gas and the high atomization of the carbonaceous slurry.

Abstract: An improved burner nozzle and process for making a synthetic or fuel gas mixture containing hydrogen and carbon monoxide by the partial oxidation, in a free-flowing hollow reactor, of a slurry of solid carbonaceous fuel in a liquid carrier admixed with a gas containing free oxygen. The nozzle may also be used in other applications where nozzles are required to handle slurries having a high concentration of finely-divided solids that must be uniformly admixed with a gas, as for example, in the aeration or incineration processes of a waste disposal plant. The nozzle and process include enveloping of an annular slurry stream between a central layer and an annular layer of high velocity gas, impinging the annular slurry stream on a downstream nozzle diffuser where a zone of high shear forces produce a uniform atomized admixture of solids, liquids and gases, and then transporting the admixture through an exit orifice at an accelerated velocity to further atomize the admixture.