Gas-treatment plant for molten metal
AssigneeGroupement pour les Activities Atomiques et Advancees "GAAA"
InventorHenri Carbonnel
Life of this patent
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Abstract
Molten corrosive metals such as aluminium are treated, especially for purification, by injecting of gases such as chlorine or nitrogen. This gas-treatment plant comprises a gas-treatment device immersed in a part of a furnace containing molten metal; an electromagnetic pump, situated above the gas-treatment device, stirs the mixture of gas and metal by counter-pressure operation and slag is formed in a decanting tank.
Claims9
Gas-treatment plant for molten metal comprising a gas-treatment device in the form of an electromagnetic pump having a pipe of porous material forming a bore surrounded by a metal tube and sealed thereto to form a chamber around the porous material, means connecting said chamber to a source of pressurized gas for treating molten metal, a decanting and degassing tank, and an intermediate electromagnetic pump overlying said gas-treatment device and connecting the gas-treatment device to said decanting and degassing tank, and said gas-treatment device being immersible in molten metal whereby;
- in operation, molten metal passes through the gas-treatment device to the intermediate pump and thence to the decanting and degassing tank.
Dependencies are inferred from the claim text.