Kaiser Aluminum

About: Kaiser Aluminum is a based out in . It is known for research contribution in the topics: Alloy & Corrosion. The organization has 546 authors who have published 504 publications receiving 6554 citations. The organization is also known as: Kaiser Aluminum and Chemicals.

Apparatus for mounting a transformer

Abstract: Improved apparatus for mounting one or more transformers, in cluster fashion, about an upstanding pole support and the like. The apparatus is generally comprised of at least one supportengaging bearing plate, a transformer mounting bracket slidably connected to the bearing plate and an adjustable link subassembly slidably and pivotally interlocked to the bearing plate for facilitating unitized handling and quick emplacement of the bearing plate about a pole as well as for providing fine and extensive adjustment of the emplaced bearing plate about the pole.

Short-term fluctuations in heavy metal concentrations in Antarctic snow

Abstract: Heavy metal variations in polar ice cores may reflect changes in global airborne pollution1. Reported profiles from Antarctica1–3 and Greenland4, where sampling resolution was normally larger than a year, have shown a much greater variability than can be reasonably accounted for by variations in the annually smoothed emissions of anthropogenic sources and most natural sources. Volcanism has been invoked4 to account for major features. We now report data from a finely resolved sample sequence from a remote plateau region of the Antarctic Peninsula. Variations of similar magnitude to those reported for longer time series occur also on the scale of seasonal changes and even of single snowfalls; these must be controlled by meteorological processes. We conclude that changes in large-scale transport processes and depositional mechanisms on longer tune scales may have as important a role as emission rates in generating the concentration profiles observed in deeper ice cores.

Bayer process production of alumina hydrate

Abstract: An improved precipitation system is provided for the Bayer process production of alumina hydrate. In order to produce coarse and strong alumina hydrate at high yield, supersaturated Bayer process sodium aluminate liquor is seeded with a relatively small seed charge in a first precipitator at a relatively low temperature and the produced slurry is transferred to a second precipitator where without additional seeding, the solids content of the slurry is allowed to increase to about 250-700 g/l by accumulating solids in the line until the desired solids content is reached. After a suitable residence time, a coarse, strong product hydrate can be recovered in yields of or exceeding 80 g/l based on the alumina (Al 2 O 3 ) content of the supersaturated sodium aluminate liquor subjected to precipitation. The process not only produces the desired product at high yield but also, due to the use of a single, small seed charge, the precipitation system requires fewer precipitators and classifiers for a given residence time. Additionally, it allows significant energy savings by eliminating the need for cooling during the precipitation cycle due to the lower than conventional temperatures which can be utilized in the first precipitator.

Energy consumption of aluminium smelting cells containing solid wetted cathodes

Abstract: Tests with 10 kA pilot cells show that substituting a wetted, dimensionally stable cathode for the turbulent metal cathode allows the anode-cathode distance (ACD) to be decreased, with an attendant voltage reduction of about 1 V, depending on current density. Since high current efficiency is retained, specific energy consumption is decreased by about 20%. These savings are not as great as anticipated, however, because the effective electrical resistivity of the electrolyte increases as the ACD is lowered. This effect is ascribed to an increased void fraction of anode gas in the interpolar space, which appears to be dependent on anode size.