Showing papers by "Kaiser Aluminum published in 1980"

Alumina hydrate production from Bayer liquor by seeding

Abstract: A precipitation system is provided for the production of strong, coarse alumina hydrate (Al 2 O 3 .3H 2 O) from Bayer process aluminate liquors. In the system three distinct, but interconnected processing stages are utilized which comprise an agglomeration stage, a growth stage and a seed generation stage. In the agglomeration stage hydrate particles agglomerate to form coarse particles; in the growth stage these particles grow and acquire strength; while in the seed generation stage alumina hydrate seed is generated to be used in the agglomeration and growth stages. The precipitation system combines the advantages of both the American and European Bayer processes in that it results in the production of a strong, coarse product hydrate and an increased yield.

Ni/Co Mo P on titania-alumina hydrodesulfurizing catalyst and process of hydrodesulfurizing using the same

Abstract: This invention relates to improvements in substrates containing alumina and a Group IV-B oxide and in producing the same and in processes of producing hydrodesulfurizing catalysts based on Group VIII and Group VI in the catalysts employing such substrates, and hydrodesulfurizing process employing the same.

Cement waste product as scrubbing medium for sulfur oxides

Abstract: Cement waste product (CWP), such as recovered from kilns utilized in cement production, is used for scrubbing of sulfur oxide-containing industrial offgases. The CWP is preconditioned with liquid water prior to employing it as a scrubbing medium. Preconditioning involves addition of sufficient water to the essentially anhydrous CWP to achieve essentially total rehydration of the rehydratable calcium compounds contained in the CWP, for example, aluminates, oxide and sulfates. The preconditioned CWP is dried and used as a highly efficient scrubbing medium for sulfur oxides.

Method of forming a metal wheel

Abstract: A one-piece metal wheel, preferably of aluminum, for example a wheel suitable for use on automotive and truck vehicles, is formed by (1) extruding a straight section comprising a first portion in the configuration of the wheel rim and an integral straight web portion, (2) cutting this extrusion to the appropriate length and forming it into a circular shape, (3) joining, for example by pressure welding the ends of the extrusion to form a continuous loop, and (4) deforming the web portion of the extrusion to form the center or disc of the wheel.

Taphole assembly and method of installation

Abstract: A taphole assembly comprises three refractory pieces: (1) a monolithic central block with a hole for the passage of molten metal and (2) upper and lower wedge supports for the central block. The purpose of the assembly is to position the taphole between parallel layers of lining brick with the metal conducting hole at an angle to the lining brick surfaces. The assembly is installed by supporting the central block on a counterweighted bar in position in the furnace, and constructing the furnace lining around the assembly.