Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reissue Patent
1998-07-21
2001-01-16
Kastler, Scott (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C266S144000, C266S156000
Reissue Patent
active
RE037014
ABSTRACT:
FIELD OF THE INVENTION
The present invention concerns a combined installation consisting of at least one unit for the production of at least one metal, comprising at least one device for the production or treatment of metal, and at least one unit for the separation of gas from the air, with at least one outlet for at least one air gas.
BACKGROUND OF THE INVENTION
Metal production units, in particular for steel, at present integrate several metal production or treatment devices, if necessary regrouping them in a complete production line that extends from the treatment of the raw mineral to the production of finished products ready for marketing. Most of these metal production or treatment devices consume large quantities of compressed air (over 100 Nm
3
of air per ton of metal) and/or gas from the air, notably oxygen (over 50 Nm
3
per ton of metal) and/or a neutral gas (over 10 Nm
3
per ton of metal). These air gases are generally supplied from liquefied gas containers or by gas pipelines. Besides, these air gases are produced by units for the separation of air gases, notably of the cryogenic type, which are also supplied with compressed air. Whether for the metal production or treatment devices or for the air gas separation units, the air compressors used are particularly heavy-duty items of equipment that consume a great deal of electrical energy, and because of this, considerably increase the production costs of such units.
SUMMARY OF THE INVENTION
The aim of the present invention is to propose a combined installation comprising at least one metal production unit and at least one unit for the separation of air gas, which will optimize the synergism between these units, notably by sharing a compressed air production unit and by the direct, on-site coupling of metal production or treatment units with the sources of air gas offered by the air gas separation unit.
To this end, in accordance with one characteristic of the invention, the combined installation comprises a compressed air production unit having at least one outlet connected to an air gas separation unit and to the said production or treatment unit, to supply these latter with air.
In accordance with another characteristic of the invention, the installation comprises at least one fluid pipeline connecting the outlet of the separation unit to the said device and supplying at least one air gas, in gaseous or liquid form, to the latter.
The present invention also aims to propose a combined installation of the above type which also makes use of the thermal synergism between the two units, notably the refrigeration power offered by a separation unit, in particular of the cryogenic type.
To this end, in accordance with a characteristic of the invention, the metal production or treatment unit comprises at least one cooling circuit, at least one part of which is functionally associated with at least one fluid circuit of the cryogenic air gas separation unit.
A further aim of the invention is the optimization of a cryogenic separation unit supplied with excess compressed air.
REFERENCES:
patent: 1445973 (1923-02-01), Roberts et al.
patent: 2079019 (1937-05-01), Karwat et al.
patent: 3241327 (1966-03-01), La Fleur
patent: 3304074 (1967-02-01), Atherton
patent: 4962646 (1990-10-01), Rathbone
patent: 5076837 (1991-12-01), Rathbone
patent: 5244489 (1993-09-01), Grenier
patent: 3114 842 A1 (1982-10-01), None
patent: 3114842 (1982-10-01), None
patent: 42 19 160 (1992-12-01), None
patent: 0532429 (1993-03-01), None
patent: 2266344 (1993-10-01), None
patent: 2 266 344 (1993-10-01), None
patent: 61-139609 (1986-06-01), None
Chater et al, “Recent Advantages with Oxygen in Iron and Steel Making,” Butterworths, Washington, Dec. 1964, pp. 9-13;.
Springmann, “The Planning of Large Oxygen Plants in Steel Works,” Dec. 1976, pp. 1-13.
Maschlanka, “COREX, A New Iron Source for EAF-Steelmaking,” 16thAdvanced Technology Symposium Alternative Iron Sources for the EAF, May 2-5, 1993, Myrtle Beach, SC, USA;.
Lankford, Jr. et al, “The Making, Shaping and Treating of Steel,” Tenth Edition, Herbick & Held, Pittsburgh, Pennsylvania, USA Dec. 1985, pp. 2, 351, 352, 575, 576, 599, 759;.
Specialized article “Zur Planung grosser; Sauerstoffanlagen in Stahlwerken [about the planning of large oxygen plants in steelworks]” from Lind-Berichte aus Technik und Wissenschaft [Linde reports from Technology and Science], No. 40 (Dec. 1976), pp. 24 to 29;.
Section “Druckluftversorgung [Compressed-air supply]” from Ullmanns Encyklop{umlaut over (a)}die der technischen Chemie [Ullmann's Encyclopaedia of Industrial Chemistry], 4thEdition, vol. 2, Dec. 1972, pp. 357 and 358;.
Section “Ausfuhrung und Betrieb der Anlagen zur Gasverflussigung [Design and operation of the plants for gas liquefaction and separation of gas mixtures] . . . ” from the handbook “Tieftemperaturtechnik [Low-temperature technology]”, Dec. 1985, pp. 441-443, and English language translation thereof.
Buffenoir Marc
Deloche Daniel
Guillard Alain
Burns. Doane, Swecker & Mathis, L.L.P.
Kastler Scott
L'Air Liquide, Societe Anonyme pour l'Etude et l'
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