L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

L'air Liquide, S.a.

Harald Winter

Dieter Funders

A method and an apparatus for the uninterrupted supply of liquid subcooled carbon dioxide. The liquid is supplied at a nearly constant pressure greater than about 40 bar. Liquid carbon dioxide is supplied at a low pressure and is sent into a low pressure tank where it is stored temporarily. The carbon dioxide is then pumped, with a pump, from the low pressure tank to a high pressure tank. During the pumping, the pressure of the carbon dioxide is increased. The carbon dioxide is stored in the high pressure tank until its removal. When the carbon dioxide is removed, it is in a thermodynamic disequilibrium between the liquid and gas phases.

Method for non-intermittent provision of fluid supercool carbon dioxide at constant pressure above 40 bar as well as the system for implementation of the method

A process for reducing dust emission and free air access in the tapping region of a blast furnace by applying CO.sub.2 in a solid and/or gaseous state to the molten material and or the runners and vessels associated therewith. This process reduces dust emissions, nitriding of the product and energy costs associated with conventional dust reduction operations as well as wear of the refractory materials.

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Mönchengladbach, Germany

Harald Winter