公开(公告)号：NO20005501A

公开(公告)日：2001-05-18

申请号：NO20005501

申请日：2000-11-01

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： MAHONEY WILLIAM JOHN ,  ANDERSON JOHN ERLING

IPC: F23D14/54 ,  C21C5/46 ,  C22B9/05 ,  F23D14/22 ,  F23D14/48 ,  F27D3/16 ,  F27D7/02 ,  F27D99/00 ,  F23D14/38

CPC classification number: F27D99/0033 ,  F23C2900/07021 ,  F23C2900/07022 ,  F23D14/22 ,  F23D14/48 ,  F23D2900/00006 ,  F23D2900/11403 ,  F23L2900/07002 ,  F27D3/16

公开(公告)号：ZA200004603B

公开(公告)日：2001-03-07

申请号：ZA200004603

申请日：2000-09-01

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  MAHONEY WILLIAM JOHN ,  SARMA BALU

IPC: F23N5/00 ,  B05B1/34 ,  F23C5/14 ,  F23D14/22 ,  F23D14/32 ,  F23D14/84 ,  F27D7/02 ,  F15D

Abstract: A method for changing the length of a coherent jet (20) by establishing a coherent jet using a flame envelope (23) generated using gaseous fuel and changing the flowrate of the gaseous fuel, preferably using inert gas for make up to maintain a constant total flowrate of fuel and inert gas.

公开(公告)号：ZA200001650B

公开(公告)日：2000-10-24

申请号：ZA200001650

申请日：2000-03-31

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  FARRENKOPF DENNIS ROBERT ,  SEMENZA RICHARD THOMAS ,  MATHUR PRAVIN CHANDRA ,  MAHONEY WILLIAM JOHN

IPC: C21C5/30 ,  C21C5/46 ,  C21C5/48 ,  C22B9/05 ,  C21C7/072 ,  C22B13/02 ,  C22B15/06 ,  C22B19/32 ,  F23D14/22 ,  F23D14/32 ,  F27B3/22 ,  F27D7/02 ,  F15D ,  B05B ,  C21C

Abstract: A system for establishing a plurality of coherent gas jets (20) proximate one another using a single lance (1) wherein a plurality of gas jets (20) are ejected from a corresponding plurality of nozzles (3) in a lance (1) and a flame envelope (21) is established around the plurality of gas jets (20), and the jets remain distinct and do not coalesce for their length.

公开(公告)号：BR9902285A

公开(公告)日：2000-03-14

申请号：BR9902285

申请日：1999-06-16

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  MATHUR PRAVIN CHANDRA

IPC: F02K1/28 ,  B05B1/00 ,  C21C5/46 ,  F04F5/22 ,  F23D14/22 ,  F23D14/32 ,  F27D3/16 ,  F23C5/00

Abstract: A system for establishing and maintaining a supersonic coherent gas jet, effective with either an oxidizing or an inert gas, employing a converging/diverging nozzle for establishment of a non-disruptive initial supersonic velocity, and a slower moving defined triple layered flame envelope coaxial with the jet for effective maintenance of the supersonic velocity. The invention is particularly useful for providing gas into a pool of liquid.

公开(公告)号：PL328264A1

公开(公告)日：2000-03-13

申请号：PL32826498

申请日：1998-08-28

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： MATHUR PRAVIN CHANDRA ,  SELINES RONALD JOSEPH ,  ANDERSON JOHN ERLING

IPC: C21C5/52 ,  F27D3/16

公开(公告)号：CA2281380A1

公开(公告)日：2000-03-04

申请号：CA2281380

申请日：1999-09-03

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER LINCOLN MATTHEW ,  LEGER CHRISTOPHER BRIAN ,  FRANCIS ARTHUR WELLINGTON JR ,  ANDERSON JOHN ERLING

IPC: B01F23/10 ,  B01J3/00 ,  B01J3/02 ,  B01J12/00 ,  B01J19/00 ,  B01J19/26 ,  C01B32/40

Abstract: The invention comprises a reactor having a source of a first hot reactant gas, a mixing chamber in which said first hot reactant gas mixes with a second reactant gas to form a reactant gas mixture, but wherein substantially no reaction takes place and a reaction zone wherein said mixture undergoes vapor phase reaction. A process for using the reactor is also disclosed.

公开(公告)号：AU7746598A

公开(公告)日：2000-02-17

申请号：AU7746598

申请日：1998-07-23

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： MATHUR PRAVAN CHANDRA ,  SELINES RONALD JOSEPH ,  ANDERSON JOHN ERLING

IPC: F27B3/22

公开(公告)号：AU3506599A

公开(公告)日：2000-01-06

申请号：AU3506599

申请日：1999-06-16

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  MATHUR PRAVIN CHANDRA

IPC: F02K1/28 ,  B05B1/00 ,  C21C5/46 ,  F04F5/22 ,  F23D14/22 ,  F23D14/32 ,  F27D3/16 ,  C21C5/30 ,  C21C7/068 ,  F15D1/08 ,  B05B1/14 ,  B05B1/34 ,  B05B7/08 ,  B01F5/04 ,  B01F13/02

Abstract: A system for establishing and maintaining a supersonic coherent gas jet, effective with either an oxidizing or an inert gas, employing a converging/diverging nozzle for establishment of a non-disruptive initial supersonic velocity, and a slower moving defined triple layered flame envelope coaxial with the jet for effective maintenance of the supersonic velocity. The invention is particularly useful for providing gas into a pool of liquid.

公开(公告)号：PL329788A1

公开(公告)日：1999-05-24

申请号：PL32978898

申请日：1998-11-19

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  MATHUR PRAVIN CHANDRA ,  SELINES RONALD JOSEPH

IPC: C21C5/48 ,  C21C5/46 ,  C21C5/52 ,  C21C7/072 ,  F23M3/04

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.

公开(公告)号：ZA987865B

公开(公告)日：1999-03-02

申请号：ZA987865

申请日：1998-08-28

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： MATHUR PRAVIN CHANDRA ,  SELINES RONALD JOSEPH ,  ANDERSON JOHN ERLING

IPC: C21C7/072 ,  C21C5/46 ,  C21C5/52 ,  F27B3/22 ,  F27D3/16 ,  F27B

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.