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公开(公告)号：BR9800905A
公开(公告)日：1999-09-28
申请号：BR9800905
申请日：1998-03-16
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： MATHUR PRAVIN CHANDRA , SELINES RONALD JOSEPH , ANDERSON JOHN ERLING
Abstract: A method for effectively providing main gas into a pool of molten metal, which is particularly useful for use in an electric arc furnace. The method employs combustion of secondary oxygen with fuel to form a flame envelope around a main gas stream which protects the main gas from entrainment of ambient gases as it passes through the headspace of the furnace. This enables the gas to retain to a substantial degree its original force upon injection into the headspace and thus may be injected into the furnace at a safe distance from the molten metal surface while still achieving substantially complete penetration into the molten metal.
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公开(公告)号：BR9503388A
公开(公告)日：1996-07-16
申请号：BR9503388
申请日：1995-07-20
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： MATHUR PRAVIN CHANDRA , DU ZHIYOU , SELINES RONALD JOSEPH
Abstract: A method for carrying out post combustion in an electric arc furnace comprising forming a preferential gas stream within the electric arc furnace, concentrating carbon monoxide within the gas stream, and providing post combustion oxygen into the gas stream where the carbon monoxide is concentrated.
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公开(公告)号：AU785348B2
公开(公告)日：2007-02-01
申请号：AU2934802
申请日：2002-03-28
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： SARMA BALU , MAHONEY WILLIAM JOHN , ANDERSON JOHN ERLING , SELINES RONALD JOSEPH
Abstract: A metal refining method particularly useful with a basic oxygen steelmaking process, wherein during an initial period, refining oxygen is provided into the furnace headspace surrounded by a shroud comprising oxygen and inert gas, and during a subsequent period refining oxygen is provided into the furnace headspace surrounded by a flame shroud.
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公开(公告)号：DE60201780T2
公开(公告)日：2005-11-03
申请号：DE60201780
申请日：2002-03-29
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： SARMA BALU , SELINES RONALD JOSEPH , ANDERSON JOHN ERLING , MAHONEY WILLIAM JOHN
Abstract: A metal refining method particularly useful with a basic oxygen steelmaking process, wherein during an initial period, refining oxygen is provided into the furnace headspace surrounded by a shroud comprising oxygen and inert gas, and during a subsequent period refining oxygen is provided into the furnace headspace surrounded by a flame shroud.
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公开(公告)号：DE60201780D1
公开(公告)日：2004-12-09
申请号：DE60201780
申请日：2002-03-29
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： SARMA BALU , SELINES RONALD JOSEPH , ANDERSON JOHN ERLING , MAHONEY WILLIAM JOHN
Abstract: A metal refining method particularly useful with a basic oxygen steelmaking process, wherein during an initial period, refining oxygen is provided into the furnace headspace surrounded by a shroud comprising oxygen and inert gas, and during a subsequent period refining oxygen is provided into the furnace headspace surrounded by a flame shroud.
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Patent Agency Ranking
公开(公告)号：MY117418A
公开(公告)日：2004-06-30
申请号：MYPI9803401
申请日：1998-07-24
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： MATHUR PRAVIN CHANDRA , SELINES RONALD JOSEPH , ANDERSON JOHN ERLING
Abstract: A METHOD FOR EFFECTIVELY PROVIDING MAIN GAS INTO A POOL OF MOLTEN METAL, WHICH IS PARTICULARLY USEFUL FOR USE IN AN ELECTRIC ARC FURNACE. THE METHOD EMPLOYS COMBUSTION OF SECONDARY OXYGEN WITH FUELTO FORM A FLAME ENVELOPE AROUND A MAIN GAS STREAM WHICH PROTECTS THE MAIN GAS FROM ENTRAIMENT OF AMBIENT GASES AS IT PASSES THROUGH THE HEADSPACE OF THE FURNACE. THIS ENABLES THE GAS TO RETAIN TO A SUBSTANTIAL DEGREE ITS ORIGINAL FORCE OPEN INJECTION INTO THE HEADSPACE AND THUS MAY BE INJECTED INTO THE FURNACE AT A SAFE DISTANCE FROM THE MOLTEN METAL SURFACE WHILE STILL ACHIEVING SUBSTANTIALLY COMPLETE PENETRATION INTO THE MOLTEN METAL.
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公开(公告)号：IN191786B
公开(公告)日：2004-01-03
申请号：IN1369DE1995
申请日：1995-07-20
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： MATHUR PRAVIN CHANDRA , DU ZHIYOU , SELINES RONALD JOSEPH
IPC: C21C5/52
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公开(公告)号：DE69812544T2
公开(公告)日：2003-11-13
申请号：DE69812544
申请日：1998-11-19
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： ANDERSON JOHN ERLING , MATHUR PRAVIN CHANDRA , SELINES RONALD JOSEPH
Abstract: A lance which may be used to establish a long coherent gas jet which includes a primary passageway having a converging/diverging nozzle, and two radially spaced secondary passageways for establishing a flame barrier, each of the passageways communicating with an injection space defined by a protective jacket. Additional to these main passageways the jacket may comprise one or two other passages for the supply of fluid or solid streams.
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公开(公告)号：DE69806290T2
公开(公告)日：2003-03-06
申请号：DE69806290
申请日：1998-03-16
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： MATHUR PRAVIN CHANDRA , SELINES RONALD JOSEPH , ANDERSON JOHN ERLING
Abstract: A method for effectively providing main gas into a pool of molten metal, which is particularly useful for use in an electric arc furnace. The method employs combustion of secondary oxygen with fuel to form a flame envelope around a main gas stream which protects the main gas from entrainment of ambient gases as it passes through the headspace of the furnace. This enables the gas to retain to a substantial degree its original force upon injection into the headspace and thus may be injected into the furnace at a safe distance from the molten metal surface while still achieving substantially complete penetration into the molten metal.
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公开(公告)号：BR0201028A
公开(公告)日：2003-02-11
申请号：BR0201028
申请日：2002-03-28
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： SARMA BALU , SELINES RONALD JOSEPH , ANDERSON JOHN ERLING , MAHONEY WILLIAM JOHN
Abstract: A metal refining method particularly useful with a basic oxygen steelmaking process, wherein during an initial period, refining oxygen is provided into the furnace headspace surrounded by a shroud comprising oxygen and inert gas, and during a subsequent period refining oxygen is provided into the furnace headspace surrounded by a flame shroud.
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