C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/12
C21D 3/02 (2006.01) B21B 45/04 (2006.01) C23G 3/04 (2006.01)
Patent
CA 1247992
PROCESS AND APPARATUS FOR DEOXIDATION OF SHELLS FOR THE PRODUCTION OF PIPES ABSTRACT OF THE DISCLOSURE A process is disclosed for the processing of deoxidation agents, especially those used for the deoxidation of shells heated to rolling temperature for the production of pipes. The deoxidation agent is fed by volumetric or gravimetric dosing into a pressure container. From 5 up to 100 g of deoxidation agent is present per square meter (m2) of the inside wall surface of the shell. Compressed gas is inserted into the pressure container so that a ratio of from 50 to 750 standard liters of gas per kilogram of deoxidation agent is attained. The gas and the deoxidation agent are guided as a homogenous mixture through a transport line to a nozzle of special design, which guides the homogenous mixture in a circular, turbulent, laminary or pulsating movement in the shell, which has been heated to rolling temperature. In this manner, the deoxidation agent is applied to the walls of the shell. Apparatus is also disclosed for processing deoxidation agents according to the above process. The apparatus has a supply container for the deoxidation agent, and a volumetric or gravimetric dosing arrangement attached to it which empties into a pressure container. The pressure container has an inlet for pressurized gas and an outlet for the gas-deoxidation-agent mixture. The outlet is controlled by valve. The apparatus also has a conveying line, while a delivery nozzle, located on the end of the conveying line, is used for the gas-deoxidation-agent mixture.
487228
Bonifay Michel
Furrer Hansjorg
G. Ronald Bell & Associates
Lonza Ltd.
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