Inland Steel Company

Other

James E Bradley

Shankverm R Balajee

Leonard M Keilman

William F Flanagan, Jr

Duane C Leach

An aquaculture system is provided for filtering water and includes a filter rotatably carried in a container for receiving water to be filtered. The filter includes a porous resilient filter screen forming an outer layer of the filter for removing particulate from water passing through the filter screen. A vacuum cleaning device is positioned in direct contact with the resilient filter screen for removing particulate collected at the outer surface of the resilient filter screen. A water nozzle supplies a stream of water to the resilient filter screen to remove particulate therefrom not previously removed by the vacuum cleaning device. A rotation device is coupled to the filter to rotate the filter in the container.

Aquaculture filtration system employing a rotating drum filter

A method for degassing molten steel comprises the use of a lift gas which includes carbon dioxide. The inventive method includes providing a reaction zone isolated from the ambient atmosphere, and providing a bath of molten steel, at least a portion of which is located in the reaction zone. The pressure is reduced in the reaction zone to a sub-atmospheric pressure. A gas comprising carbon dioxide is supplied to the bath of molten steel in order to vertically circulate the molten steel. The method also preferably includes (a) supplying carbon dioxide, e.g., with a tuyere, to the reaction zone and (b) supplying carbon dioxide to the bath of molten steel, e.g., by gas bubbling or stirring. An apparatus for performing the method steps is also disclosed.

Steelmaking degassing apparatus

Steelmaking degassing method

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Wheatfield, IN, United States of America

James E Bradley