EP0653599A1 - Combined installation of a metal production unit and a separation unit of gases from air - Google Patents

Combined installation of a metal production unit and a separation unit of gases from air Download PDF

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Publication number
EP0653599A1
EP0653599A1 EP94402427A EP94402427A EP0653599A1 EP 0653599 A1 EP0653599 A1 EP 0653599A1 EP 94402427 A EP94402427 A EP 94402427A EP 94402427 A EP94402427 A EP 94402427A EP 0653599 A1 EP0653599 A1 EP 0653599A1
Authority
EP
European Patent Office
Prior art keywords
installation according
unit
iii
metal
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94402427A
Other languages
German (de)
French (fr)
Other versions
EP0653599B1 (en
Inventor
Alain Guillard
Marc Buffenoir
Daniel Deloche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0653599A1 publication Critical patent/EP0653599A1/en
Application granted granted Critical
Publication of EP0653599B1 publication Critical patent/EP0653599B1/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D46/00—Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • F25J3/04121—Steam turbine as the prime mechanical driver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04163—Hot end purification of the feed air
    • F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
    • F25J3/04181—Regenerating the adsorbents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
    • F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04551—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production
    • F25J3/04557—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production for pig iron or steel making, e.g. blast furnace, Corex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04563—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04593—The air gas consuming unit is also fed by an air stream
    • F25J3/046—Completely integrated air feed compression, i.e. common MAC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04612—Heat exchange integration with process streams, e.g. from the air gas consuming unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • F25J3/04957—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipments upstream of the fractionation unit (s), i.e. at the "front-end"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • F25J2205/66—Regenerating the adsorption vessel, e.g. kind of reactivation gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • F25J2205/66—Regenerating the adsorption vessel, e.g. kind of reactivation gas
    • F25J2205/70—Heating the adsorption vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/40—Air or oxygen enriched air, i.e. generally less than 30mol% of O2
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/24—Multiple compressors or compressor stages in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/40—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/70—Steam turbine, e.g. used in a Rankine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/906—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by heat driven absorption chillers

Definitions

  • the present invention relates to a combined installation of at least one unit for producing at least one metal, comprising at least one device for producing or treating metal, and at least one unit for separating gas from air. comprising at least one outlet for at least one air gas.
  • the metal production units in particular of steel production, currently integrate several metal production or treatment devices to eventually group them into a complete production line from the processing of raw ore to the production of products. finished, ready for marketing.
  • Most of these metal production or treatment devices are large consumers of compressed air (more than 100 Nm3 of air per tonne of metal) and / or air gases, in particular oxygen, (more than 50 Nm3 per tonne of metal) and / or a neutral gas (more than 10 Nm3 per tonne of metal).
  • compressed air more than 100 Nm3 of air per tonne of metal
  • air gases in particular oxygen, (more than 50 Nm3 per tonne of metal) and / or a neutral gas (more than 10 Nm3 per tonne of metal).
  • These air gases are generally supplied from liquefied gas containers or through gas pipelines.
  • These air gases are moreover produced by air gas separation units, in particular of the cryogenic type, also supplied with pressurized air.
  • Air compressors whether for metal production or processing devices or for
  • the object of the present invention is to provide a combined installation of at least one metal production unit and at least one air gas separation unit optimizing the synergies between these units, in particular by pooling d '' a compressed air production unit and by direct coupling, on site, of metal production or treatment devices with the air gas sources offered by the air gas separation unit.
  • the combined installation comprises a compressed air production unit having at least one outlet connected to the gas separation unit from the air and to said device for producing or treatment for the air supply thereof.
  • the installation comprises at least one fluid line connecting the outlet of the separation unit to said device for the supply of at least one air gas, in gaseous or liquid form, to the latter.
  • the present invention also aims to provide a combined installation of the aforementioned type and also exploiting the thermal synergies between the two units, in particular the refrigeration capacities offered by a separation unit, in particular of the cryogenic type.
  • the metal processing production device comprises at least one cooling circuit, at least part of which is functionally associated with at least one fluid circuit of the cryogenic separation unit of air gas.
  • the invention also relates to the optimization of a cryogenic separation unit having excess compressed air.
  • a high and medium pressure compressed air production group I there are three main groups cooperating mutually, namely a high and medium pressure compressed air production group I, a steel production line II and a cryogenic separation unit of air gas III, here of the cryogenic type.
  • line II comprises a steel melting furnace 1, typically an EAF arc furnace or a furnace with nozzles and burners EOF, the molten metal of which is transferred to a device 2 for processing or nuancing the molten steel of converter type, AOD ("Argon oxygen decarburization) or BOF (" Basic oxygen furnace "), which is then transferred, via a continuous casting device 3 and a continuous reheating furnace 4 to a rolling train 5.
  • the furnace 1 is supplied with steel either directly from a device 6 for reducing or pre-reducing iron ore, of the blast furnace or direct reduction COREX or DRI type, either in scrap metal by a scrap sorting device 7.
  • the cryogenic unit for the separation of air gas III typically comprises at least one double distillation column 9, comprising, as shown in FIG. 2, a medium pressure column 10 and a low pressure column 11 and, advantageously, a column of argon mixture (not shown), and supplied with compressed air, under a pressure of at least 4x105 Pa, typically of 6 to 3 5 x 105 Pa, via a compressed air supply line 12 incorporating an adsorbent purification device 13.
  • the separation unit comprises at least one pure oxygen outlet 14, one outlet substantially pure nitrogen 15, a substantially pure argon outlet 16, a waste gas outlet 17 (generally impure nitrogen) and an additional cryogenic fluid outlet 18, for example liquid or gaseous nitrogen or liquid air.
  • groups II and III are supplied with compressed air by the same common compression group I comprising a train of compressors 19 having several outputs, at least some of which are associated with a group of drying and deoiling 20, supplying at least high pressure compressed air (typically greater than 6 x 105 Pa) to at least one line 21 and advantageously at least medium pressure compressed air (between 3 and 6 x 105 Pa), to a series of pipes 22.
  • a train of compressors 19 having several outputs, at least some of which are associated with a group of drying and deoiling 20, supplying at least high pressure compressed air (typically greater than 6 x 105 Pa) to at least one line 21 and advantageously at least medium pressure compressed air (between 3 and 6 x 105 Pa), to a series of pipes 22.
  • the pipe 21 is directly connected to the pipe 12 while the pipes 22 are connected, via an adjustment and, optionally, pressure relief device 23 to the furnace 1, for the supply burners or nozzles, to the molten steel treatment device 2, for the supply of nozzles or burners, to the reheating furnace 4, to the supply of burners, and to the rolling train 5, for the supply of air spray tion of cooling water, as well as, for the supply to all of these devices, of medium pressure dry air called "air instrument "for the protection or sheathing of monitoring control instruments of these devices, for example temperature probes or television cameras.
  • Medium pressure air is also sent to the sorting device 7 for supplying the sorting air ejection nozzles therefrom.
  • Medium pressure air and / or high pressure air is also sent to the steel reduction or pre-reduction device 6 for supplying nozzles or burners of the latter and / or for the supply of instrument air.
  • Dry compressed air at medium pressure can also be supplied, at an outlet 24 of the device 23, to a network of compressed air for other utility devices of the installation or neighbors thereof.
  • the oxygen supplied by group III is sent to the reduction or pre-reduction device 6, for the supply of burners or injectors, to the oven 1, for the supply burners or post-combustion nozzles, to the molten steel treatment device 2, for the supply of nozzles or burners of the latter, and to the reheating furnace 4 for the supply of burners of the latter.
  • nitrogen and / or argon are sent to device 1, for conveying carbonaceous particles, to device 2, for bubbling therein, and to devices 3 to 5, for their inerting or zoning.
  • a supply pipe of cooling water 26 is placed in a heat exchange condition, direct or indirect, in a exchanger 27, with a flow of cold or saturable residual gas available at outlet 17 and / or at outlet 18 of the double column 9 and conveyed by a pipe 170, the water thus cooled being sent to inlet A of the circuit of cooling water from oven 1, or to a part of the cooling circuit of this oven 1 involving the hottest areas, at an inlet B of cooling water from at least one stage of the compressor train 19, and / or at a cooling water inlet C of the reduction or pre-reduction device 6.
  • the synergy between groups II and III can be further improved by recovering the hot water or the steam from the cooling circuit A at l water from the oven 1, from the circuit C for cooling the device 6, and / or from the circuit B for cooling the compressor train in order to send it to the purification device 13 with a view to regenerating its adsorbent.
  • the hot water or steam leaving the cooling circuits A to C, and / or the hot compressed air leaving a stage of the compressor train 19 can also be used to vaporize a cryogenic liquid available at the outlet of the separation unit III or, in particular for argon not necessarily produced by unit III, supplied by a tank, the resulting gas being at least partly supplied to the devices of unit II.
  • the compressor train 19, at least in part, is of the type driven by pressurized steam, advantageously supplied by a steam network E, of which at least a part is in heat exchange relationship with at least one of the devices 1-6 of the metal production unit II.
  • the water vapor network E is more particularly connected to at least one of the metal melting furnace 1, the reheating furnace 4 and the device for reduction or pre-reduction of ores 6.
  • FIG. 2 shows a particular embodiment of group III exploiting the availability of large quantities of high pressure air at the outlet of a high capacity compressor group and used to produce oxygen and nitrogen at at least medium pressure and clean, dry air at at least medium pressure to supply at least to the various devices in group II.
  • the high pressure compressed air supply line 12 comprising, upstream of the purification device 13, a refrigeration unit 28, of the mechanical or absorption type, the cooled and purified air being over compressed by a booster 29 driven by an expansion turbine 30, called the Claude turbine, which relaxes part of the compressed air cooled in a first exchange line 31 for its introduction into the tank of the medium pressure column 10, part of the supercharged and cooled air being addressed by passing through a second cold exchange line 32 and an expansion valve at an intermediate level of the medium pressure column, and, after sub-cooling, at an upper level of the low pressure column 11.
  • liquid oxygen is extracted at 33 from the bottom of the medium pressure column 11
  • nitrogen gas is extracted at 36 from the top of the medium pressure column 10
  • liquid nitrogen e is extracted at the head of the medium pressure column 11.
  • expanded air typically at a pressure between 5 and 7 ⁇ 105 Pa, at the outlet of the turbine 30 is taken and addressed, by a line 34 crossing the exchange lines 32 and 31, to the distribution device 23 or directly to some of the devices in group II.
  • the expansion of this supplement of air not introduced into the double column 9 allows an additional production of cold which is used to obtain a greater production of the cryogenic liquids in the double column 9 and this, with a significantly better specific energy due to the supply of compressed air by the high capacity compressor group I.
  • the cryogenic unit III can supply, as shown by the network E in FIG. 1, at least part of these fluids to other user sites. , by pipes, after spraying, or in bulk form.
  • pressurized air can also be derived directly from the line connecting the booster 29 to the expansion turbine 30, upstream from the exchange line 31, for the supply, by a line 35, to the distribution device 23 or directly to at least some of the devices of group II.
  • the installation according to the invention in addition to reducing the energy, investment and operating costs, makes it possible to optimize the arrangement within the metal production unit, of each of said groups I, II and III, so as to reduce the surface area occupied on the ground and to reduce pollution, in particular the overall noise level, of the installation.
  • the installation according to the invention allows the location of group I, which is generally noisy, in a single chosen location on the site.
  • integration can be carried out in a similar manner, alternatively or additionally, with an air gas separation unit of the adsorption or permeation type, in this case producing substantially pure oxygen and / or l substantially pure nitrogen, in place and in place of a cryogenic unit such as 9 or in parallel with the latter, the two separation units being in the latter case supplied by the same unit I, as well as with production units for non-ferrous metals, including copper, nickel, zinc or lead.
  • an air gas separation unit of the adsorption or permeation type in this case producing substantially pure oxygen and / or l substantially pure nitrogen, in place and in place of a cryogenic unit such as 9 or in parallel with the latter, the two separation units being in the latter case supplied by the same unit I, as well as with production units for non-ferrous metals, including copper, nickel, zinc or lead.
  • metal production or treatment devices 1-6
  • other types of metal production or treatment devices such as pocket ovens, degassing units, surface treatment, dephosphating or desulfurization treatment. .

Abstract

The combined installation comprises at least one metal production unit (II), comprising at least one, typically a series of, metal production or treatment devices (1-6), and at least one unit (III) for separating gas from air, comprising at least one outlet (14-18) for at least one gas in air, the units being fed with compressed air at low water vapour content by a common compressed-air production unit (I), at least one of the gas outlets (14-18) of the separation unit (III) being connected to at least one of the devices (1-6) of the production unit for supplying the latter with gas.

Description

La présente invention concerne une installation combinée d'au moins une unité de production d'au moins un métal, comprenant au moins un dispositif de production ou de traitement de métal, et d'au moins une unité de séparation de gaz de l'air comprenant au moins une sortie d'au moins un gaz de l'air.The present invention relates to a combined installation of at least one unit for producing at least one metal, comprising at least one device for producing or treating metal, and at least one unit for separating gas from air. comprising at least one outlet for at least one air gas.

Les unités de production de métaux, en particulier d'aciers, intègrent actuellement plusieurs dispositifs de production ou de traitement de métal pour, éventuellement, les regrouper en une ligne complète de production depuis le traitement du minerai brut jusqu'à l'obtention de produits finis, prêts à la commercialisation. La plupart de ces dispositifs de production ou de traitement de métal sont grands consommateurs d'air comprimé (plus de 100 Nm³ d'air par tonne de métal) et/ou de gaz de l'air, notamment l'oxygène, (plus de 50 Nm³ par tonne de métal) et/ou un gaz neutre (plus de 10 Nm³ par tonne de métal). Ces gaz de l'air sont généralement fournis à partir de conteneurs de gaz liquéfié ou par des canalisations de gaz. Ces gaz de l'air sont par ailleurs élaborés par des unités de séparation de gaz de l'air, notamment de type cryogénique, alimentées également en air sous pression. Les compresseurs d'air, que ce soit pour les dispositifs de production ou de traitement de métal ou pour les unités de séparation de gaz de l'air, sont des équipements particulièrement onéreux et consommateurs d'énergie électrique, et grèvent de ce fait notablement les coûts de production de ces unités.The metal production units, in particular of steel production, currently integrate several metal production or treatment devices to eventually group them into a complete production line from the processing of raw ore to the production of products. finished, ready for marketing. Most of these metal production or treatment devices are large consumers of compressed air (more than 100 Nm³ of air per tonne of metal) and / or air gases, in particular oxygen, (more than 50 Nm³ per tonne of metal) and / or a neutral gas (more than 10 Nm³ per tonne of metal). These air gases are generally supplied from liquefied gas containers or through gas pipelines. These air gases are moreover produced by air gas separation units, in particular of the cryogenic type, also supplied with pressurized air. Air compressors, whether for metal production or processing devices or for air gas separation units, are particularly expensive equipment and consumers of electrical energy, and are therefore particularly burdensome. the production costs of these units.

La présente invention a pour objet de proposer une installation combinée d'au moins une unité de production de métal et d'au moins une unité de séparation de gaz de l'air optimisant les synergies entre ces unités, notamment par la mise en commun d'une unité de production d'air comprimé et par le couplage direct, sur site, des dispositifs de production ou de traitement de métal avec les sources de gaz de l'air offertes par l'unité de séparation de gaz de l'air.The object of the present invention is to provide a combined installation of at least one metal production unit and at least one air gas separation unit optimizing the synergies between these units, in particular by pooling d '' a compressed air production unit and by direct coupling, on site, of metal production or treatment devices with the air gas sources offered by the air gas separation unit.

Pour ce faire, selon une caractéristique de l'invention, l'installation combinée comprend une unité de production d'air comprimé ayant au moins une sortie reliée à l'unité de séparation de gaz de l'air et audit dispositif de production ou de traitement pour l'alimentation en air de ces derniers.To do this, according to a characteristic of the invention, the combined installation comprises a compressed air production unit having at least one outlet connected to the gas separation unit from the air and to said device for producing or treatment for the air supply thereof.

Selon une autre caractéristique de l'invention, l'installation comprend au moins une conduite de fluide reliant la sortie de l'unité de séparation audit dispositif pour la fourniture d'au moins un gaz de l'air, sous forme gazeuse ou liquide, à ce dernier.According to another characteristic of the invention, the installation comprises at least one fluid line connecting the outlet of the separation unit to said device for the supply of at least one air gas, in gaseous or liquid form, to the latter.

La présente invention a également pour objet de proposer une installation combinée du type précité et exploitant également les synergies thermiques entre les deux unités, notamment les capacités frigorifiques offertes par une unité de séparation, en particulier de type cryogénique.The present invention also aims to provide a combined installation of the aforementioned type and also exploiting the thermal synergies between the two units, in particular the refrigeration capacities offered by a separation unit, in particular of the cryogenic type.

Pour ce faire, selon une caractéristique de l'invention, le dispositif de production de traitement de métal comprend au moins un circuit de refroidissement dont au moins une partie est associée fonctionnellement à au moins un circuit de fluide de l'unité de séparation cryogénique de gaz de l'air.To do this, according to a characteristic of the invention, the metal processing production device comprises at least one cooling circuit, at least part of which is functionally associated with at least one fluid circuit of the cryogenic separation unit of air gas.

L'invention a également pour objet l'optimisation d'une unité de séparation cryogénique disposant d'air comprimé en excès.The invention also relates to the optimization of a cryogenic separation unit having excess compressed air.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisation donnés à titre illustratif mais nullement limitatif, faite en relation avec les dessins annexés, sur lesquels :

  • la figure 1 est une vue schématique d'un mode de réalisation d'une installation combinée selon l'invention regroupant une ligne de production d'acier et une unité de séparation cryogénique de gaz de l'air ; et
  • la figure 2 est une vue schématique d'un mode de réalisation d'une unité cryogénique de séparation de gaz de l'air convenant à une installation combinée selon l'invention.
Other characteristics and advantages of the present invention will emerge from the following description of embodiments given by way of illustration but in no way limiting, made in relation to the appended drawings, in which:
  • FIG. 1 is a schematic view of an embodiment of a combined installation according to the invention grouping together a steel production line and a unit for cryogenic separation of gas from air; and
  • Figure 2 is a schematic view of an embodiment of a cryogenic unit for separating gas from air suitable for a combined installation according to the invention.

Dans la description qui va suivre et sur les dessins, les éléments identiques ou analogues portent les mêmes chiffres de référence, éventuellement indicés.In the description which follows and in the drawings, identical or similar elements bear the same reference numbers, possibly indexed.

Dans le mode de réalisation représenté schématiquement sur la figure 1, on reconnaît trois groupes principaux coopérant mutuellement, à savoir un groupe de production d'air comprimé haute et moyenne pression I, une ligne de production d'acier II et une unité cryogénique de séparation de gaz de l'air III, ici de type cryogénique.In the embodiment shown schematically in Figure 1, there are three main groups cooperating mutually, namely a high and medium pressure compressed air production group I, a steel production line II and a cryogenic separation unit of air gas III, here of the cryogenic type.

Dans l'exemple représenté, la ligne II comprend un four de fusion d'acier 1, typiquement un four à arc EAF ou un four à tuyères et brûleurs EOF, dont le métal fondu est transféré à un dispositif 2 de traitement ou de mise à nuance de l'acier fondu de type convertisseur, AOD ("Argon oxygen decarburization) ou BOF ("Basic oxygen furnace"), qui est ensuite transféré, via un dispositif de coulée continue 3 et un four de réchauffe en continu 4 à un train de laminage 5. Le four 1 est alimenté en acier soit directement en provenance d'un dispositif 6 de réduction ou de pré-réduction de minerai de fer, du type haut fourneau ou à réduction directe COREX ou DRI, soit en ferraille par un dispositif de tri de ferrailles 7. L'unité cryogénique de séparation de gaz de l'air III comprend typiquement au moins une double colonne de distillation 9, comportant, comme représenté sur la figure 2, une colonne moyenne pression 10 et une colonne basse pression 11 et, avantageusement, une colonne de mixture argon (non représentée), et alimentée en air comprimé, sous une pression d'au moins 4x10⁵ Pa, typiquement de 6 à 35 x 10⁵ Pa, par une ligne d'amenée d'air comprimé 12 incorporant un dispositif d'épuration à adsorbant 13. Dans l'exemple représenté, I'unité de séparation comporte au moins une sortie d'oxygène pur 14, une sortie d'azote sensiblement pur 15, une sortie d'argon sensiblement pur 16, une sortie de gaz résiduaire 17 (généralement de l'azote impur) et une sortie additionnelle de fluide cryogénique 18, par exemple de l'azote liquide ou gazeux ou de l'air liquide.In the example shown, line II comprises a steel melting furnace 1, typically an EAF arc furnace or a furnace with nozzles and burners EOF, the molten metal of which is transferred to a device 2 for processing or nuancing the molten steel of converter type, AOD ("Argon oxygen decarburization) or BOF (" Basic oxygen furnace "), which is then transferred, via a continuous casting device 3 and a continuous reheating furnace 4 to a rolling train 5. The furnace 1 is supplied with steel either directly from a device 6 for reducing or pre-reducing iron ore, of the blast furnace or direct reduction COREX or DRI type, either in scrap metal by a scrap sorting device 7. The cryogenic unit for the separation of air gas III typically comprises at least one double distillation column 9, comprising, as shown in FIG. 2, a medium pressure column 10 and a low pressure column 11 and, advantageously, a column of argon mixture (not shown), and supplied with compressed air, under a pressure of at least 4x10⁵ Pa, typically of 6 to 3 5 x 10⁵ Pa, via a compressed air supply line 12 incorporating an adsorbent purification device 13. In the example shown, the separation unit comprises at least one pure oxygen outlet 14, one outlet substantially pure nitrogen 15, a substantially pure argon outlet 16, a waste gas outlet 17 (generally impure nitrogen) and an additional cryogenic fluid outlet 18, for example liquid or gaseous nitrogen or liquid air.

Selon un aspect de l'invention, les groupes II et III sont alimentés en air comprimé par un même groupe de compression commun I comprenant un train de compresseurs 19 ayant plusieurs sorties, dont au moins certaines d'entre elles sont associées à un groupe de séchage et de déshuilage 20, fournissant au moins de l'air comprimé haute pression (typiquement supérieure à 6 x 10⁵ Pa) à au moins une conduite 21 et avantageusement au moins de l'air comprimé à moyenne pression (entre 3 et 6 x 10⁵ Pa), à une série de conduites 22. La conduite 21 est directement reliée à la conduite 12 tandis que les conduites 22 sont reliées, via un dispositif de réglage et, éventuellement, de détente de pression 23 au four 1, pour l'alimentation de brûleurs ou de tuyères, au dispositif de traitement d'acier fondu 2, pour l'alimentation de tuyères ou de brûleurs, au four de réchauffe 4, pour l'alimentation de brûleurs, et au train de laminage 5, pour la fourniture d'air de vaporisation d'eau de refroidissement, ainsi que, pour la fourniture à l'ensemble de ces dispositifs, d'air sec moyenne pression dit "air instrument" pour la protection ou le gainage d'instruments de contrôle de surveillance de ces dispositifs, par exemple des sondes de température ou des caméras de télévision. De l'air moyenne pression est également adressé au dispositif de tri 7 pour l'alimentation des buses d'éjection d'air de triage de ce dernier. De l'air moyenne pression et/ou de l'air haute pression est également adressé au dispositif de réduction ou de pré-réduction d'acier 6 pour l'alimentation de tuyères ou de brûleurs de ce dernier et/ou pour la fourniture d'air instrument. De l'air comprimé sec à moyenne pression peut également être fourni, en une sortie 24 du dispositif 23, à un réseau d'air comprimé pour d'autres appareils utilitaires de l'installation ou voisins de cette dernière.According to one aspect of the invention, groups II and III are supplied with compressed air by the same common compression group I comprising a train of compressors 19 having several outputs, at least some of which are associated with a group of drying and deoiling 20, supplying at least high pressure compressed air (typically greater than 6 x 10⁵ Pa) to at least one line 21 and advantageously at least medium pressure compressed air (between 3 and 6 x 10⁵ Pa), to a series of pipes 22. The pipe 21 is directly connected to the pipe 12 while the pipes 22 are connected, via an adjustment and, optionally, pressure relief device 23 to the furnace 1, for the supply burners or nozzles, to the molten steel treatment device 2, for the supply of nozzles or burners, to the reheating furnace 4, to the supply of burners, and to the rolling train 5, for the supply of air spray tion of cooling water, as well as, for the supply to all of these devices, of medium pressure dry air called "air instrument "for the protection or sheathing of monitoring control instruments of these devices, for example temperature probes or television cameras. Medium pressure air is also sent to the sorting device 7 for supplying the sorting air ejection nozzles therefrom. Medium pressure air and / or high pressure air is also sent to the steel reduction or pre-reduction device 6 for supplying nozzles or burners of the latter and / or for the supply of instrument air. Dry compressed air at medium pressure can also be supplied, at an outlet 24 of the device 23, to a network of compressed air for other utility devices of the installation or neighbors thereof.

Corrélativement, selon un aspect de l'invention, I'oxygène fourni par le groupe III est adressé au dispositif de réduction ou de pré-réduction 6, pour l'alimentation de brûleurs ou d'injecteurs, au four 1, pour l'alimentation de brûleurs ou de tuyères de post-combustion, au dispositif de traitement d'acier fondu 2, pour l'alimentation de tuyères ou de brûleurs de ce dernier, et au four de réchauffe 4 pour l'alimentation de brûleurs de ce dernier. De même, de l'azote et/ou de l'argon sont adressés au dispositif 1, pour le convoyage de particules carbonées, au dispositif 2, pour y réaliser un bullage, et aux dispositifs 3 à 5, pour leur inertage ou zonage.Correlatively, according to one aspect of the invention, the oxygen supplied by group III is sent to the reduction or pre-reduction device 6, for the supply of burners or injectors, to the oven 1, for the supply burners or post-combustion nozzles, to the molten steel treatment device 2, for the supply of nozzles or burners of the latter, and to the reheating furnace 4 for the supply of burners of the latter. Similarly, nitrogen and / or argon are sent to device 1, for conveying carbonaceous particles, to device 2, for bubbling therein, and to devices 3 to 5, for their inerting or zoning.

On comprendra de la description qui précède que l'essentiel des gaz nécessaires à la mise en oeuvre des groupes II et III est fourni à partir du groupe de compression I qui de fait transforme l'énergie électrique, acheminée par une ligne 25, en énergie pneumatique multi-usages, en permettant ainsi de gagner sur les coûts de production avec un contrat d'énergie électrique avantageux et un groupe de compression largement dimensionné et présentant de ce fait des rendements largement supérieurs aux rendements de groupes de compression individuels pour chaque groupe ou, comme c'est souvent le cas aujourd'hui, pour chacun des dispositifs du groupe II.It will be understood from the above description that most of the gases necessary for the implementation of groups II and III are supplied from compression group I which in fact transforms the electrical energy, supplied by a line 25, into energy multi-purpose pneumatic tire, thereby making it possible to save on production costs with an advantageous electrical energy contract and a compression unit which is largely dimensioned and therefore having efficiencies much higher than the yields of individual compression groups for each group or , as is often the case today, for each of the devices in group II.

Selon un autre aspect de l'invention, on met également à profit des frigories ou des gaz saturables disponibles dans le groupe III pour refroidir des éléments des groupes II et éventuellement 1. Comme on le voit sur la figure 1, une canalisation d'amenée d'eau de refroidissement 26 est placée en condition d'échange de chaleur, direct ou indirect, dans un échangeur 27, avec un flux de gaz résiduaire froid ou saturable disponible à la sortie 17 et/ou à la sortie 18 de la double colonne 9 et acheminé par une conduite 170, l'eau ainsi refroidie étant adressée à l'entrée A du circuit d'eau de refroidissement du four 1, ou à une partie du circuit de refroidissement de ce four 1 intéressant les zones les plus chaudes, à une entrée B d'eau de refroidissement d'au moins un étage du train de compresseurs 19, et/ou à une entrée C d'eau de refroidissement du dispositif de réduction ou de pré-réduction 6. La synergie entre les groupes II et III peut encore être améliorée en récupérant l'eau chaude ou la vapeur du circuit A de refroidissement à l'eau du four 1, du circuit C de refroidissement du dispositif 6, et/ou du circuit B de refroidissement du train de compresseurs pour l'adresser au dispositif d'épuration 13 en vue de la régénération de son adsorbant.According to another aspect of the invention, use is also made of the frigories or saturable gases available in group III to cool elements of groups II and possibly 1. As can be seen in FIG. 1, a supply pipe of cooling water 26 is placed in a heat exchange condition, direct or indirect, in a exchanger 27, with a flow of cold or saturable residual gas available at outlet 17 and / or at outlet 18 of the double column 9 and conveyed by a pipe 170, the water thus cooled being sent to inlet A of the circuit of cooling water from oven 1, or to a part of the cooling circuit of this oven 1 involving the hottest areas, at an inlet B of cooling water from at least one stage of the compressor train 19, and / or at a cooling water inlet C of the reduction or pre-reduction device 6. The synergy between groups II and III can be further improved by recovering the hot water or the steam from the cooling circuit A at l water from the oven 1, from the circuit C for cooling the device 6, and / or from the circuit B for cooling the compressor train in order to send it to the purification device 13 with a view to regenerating its adsorbent.

L'eau chaude ou la vapeur en sortie des circuits de refroidissement A à C, et/ou l'air comprimé chaud en sortie d'un étage du train de compresseurs 19 peuvent également être mis à profit pour vaporiser un liquide cryogénique disponible en sortie de l'unité de séparation III ou, notamment pour de l'argon non nécessairement produit par l'unité III, fourni par un réservoir, le gaz résultant étant au moins en partie fourni aux dispositifs de l'unité II.The hot water or steam leaving the cooling circuits A to C, and / or the hot compressed air leaving a stage of the compressor train 19 can also be used to vaporize a cryogenic liquid available at the outlet of the separation unit III or, in particular for argon not necessarily produced by unit III, supplied by a tank, the resulting gas being at least partly supplied to the devices of unit II.

Selon un autre mode de réalisation de l'invention, le train de compresseurs 19, au moins en partie, est du type à entraînement par de la vapeur d'eau sous pression, fournie avantageusement par un réseau de vapeur d'eau E, dont au moins une partie est en relation d'échange thermique avec au moins un des dispositifs 1-6 de l'unité de production de métal II.According to another embodiment of the invention, the compressor train 19, at least in part, is of the type driven by pressurized steam, advantageously supplied by a steam network E, of which at least a part is in heat exchange relationship with at least one of the devices 1-6 of the metal production unit II.

De cette façon, il est possible de valoriser l'énergie produite par ledit dispositif (1-6) pour former, de manière classique, de la vapeur d'eau. A cette fin, le réseau de vapeur d'eau E est plus particulièrement relié à au moins l'un d'entre le four de fusion de métal 1, le four de réchauffe 4 et le dispositif de réduction ou de pré-réduction de minerais 6.In this way, it is possible to make use of the energy produced by said device (1-6) in order to form, in a conventional manner, water vapor. To this end, the water vapor network E is more particularly connected to at least one of the metal melting furnace 1, the reheating furnace 4 and the device for reduction or pre-reduction of ores 6.

On a représenté sur la figure 2 un mode de réalisation particulier du groupe III exploitant la disponibilité de larges quantités d'air haute pression en sortie d'un groupe compresseur de forte capacité et utilisé pour produire de l'oxygène et de l'azote à au moins une moyenne pression et de l'air sec et épuré à au moins une moyenne pression pour fourniture au moins aux différents dispositifs du groupe II. Sur cette figure, on reconnaît la ligne d'amenée d'air comprimé haute pression 12 comprenant, en amont du dispositif d'épuration 13, un groupe frigorifique 28, du type mécanique ou à absorption, l'air refroidi et épuré étant sur-comprimé par un surpresseur 29 entraîné par une turbine de détente 30, dite turbine Claude, détendant une partie de l'air surpressé et refroidi dans une première ligne d'échange 31 pour son introduction en cuve de la colonne moyenne pression 10, une partie de l'air surpressé et refroidi étant adressée en passant par une deuxième ligne d'échange froide 32 et une vanne de détente à un niveau intermédiaire de la colonne moyenne pression, et, après sous-refroidissement, à un niveau supérieur de la colonne basse pression 11. Dans ce mode de réalisation, de l'oxygène liquide est extrait, en 33, en cuve de la colonne moyenne pression 11, de l'azote gazeux est extrait, en 36, en tête de la colonne moyenne pression 10, et de l'azote liquide est extrait en tête de la colonne moyenne pression 11. Selon un aspect de l'invention, de l'air détendu, typiquement à une pression entre 5 et 7 x 10⁵ Pa, en sortie de la turbine 30 est prélevé et adressé, par une ligne 34 traversant les lignes d'échange 32 et 31, au dispositif de distribution 23 ou directement à certains des dispositifs du groupe II. La détente de ce supplément d'air non introduit dans la double colonne 9 permet une production de froid supplémentaire qui est utilisé pour obtenir une production plus importante des liquides cryogéniques dans la double colonne 9 et ce, avec une énergie spécifique notablement meilleure en raison de la fourniture d'air comprimé par le groupe compresseur I de grande capacité. De ce fait, en sus des fournitures de gaz aux dispositifs de l'unité II, l'unité cryogénique III peut fournir, comme figuré par le réseau E sur la figure 1, au moins une partie de ces fluides à d'autres sites utilisateurs, par canalisations, après vaporisation, ou sous forme de vrac. En variante, comme également représenté sur la figure 2, de l'air surpressé peut également être dérivé directement de la ligne reliant le surpresseur 29 à la turbine de détente 30, en amont de la ligne d'échange 31, pour la fourniture, par une ligne 35, au dispositif de distribution 23 ou directement à au moins certains des dispositifs du groupe II.FIG. 2 shows a particular embodiment of group III exploiting the availability of large quantities of high pressure air at the outlet of a high capacity compressor group and used to produce oxygen and nitrogen at at least medium pressure and clean, dry air at at least medium pressure to supply at least to the various devices in group II. In this figure, we recognize the high pressure compressed air supply line 12 comprising, upstream of the purification device 13, a refrigeration unit 28, of the mechanical or absorption type, the cooled and purified air being over compressed by a booster 29 driven by an expansion turbine 30, called the Claude turbine, which relaxes part of the compressed air cooled in a first exchange line 31 for its introduction into the tank of the medium pressure column 10, part of the supercharged and cooled air being addressed by passing through a second cold exchange line 32 and an expansion valve at an intermediate level of the medium pressure column, and, after sub-cooling, at an upper level of the low pressure column 11. In this embodiment, liquid oxygen is extracted at 33 from the bottom of the medium pressure column 11, nitrogen gas is extracted at 36 from the top of the medium pressure column 10, and liquid nitrogen e is extracted at the head of the medium pressure column 11. According to one aspect of the invention, expanded air, typically at a pressure between 5 and 7 × 10⁵ Pa, at the outlet of the turbine 30 is taken and addressed, by a line 34 crossing the exchange lines 32 and 31, to the distribution device 23 or directly to some of the devices in group II. The expansion of this supplement of air not introduced into the double column 9 allows an additional production of cold which is used to obtain a greater production of the cryogenic liquids in the double column 9 and this, with a significantly better specific energy due to the supply of compressed air by the high capacity compressor group I. Therefore, in addition to the gas supplies to the devices of unit II, the cryogenic unit III can supply, as shown by the network E in FIG. 1, at least part of these fluids to other user sites. , by pipes, after spraying, or in bulk form. As a variant, as also shown in FIG. 2, pressurized air can also be derived directly from the line connecting the booster 29 to the expansion turbine 30, upstream from the exchange line 31, for the supply, by a line 35, to the distribution device 23 or directly to at least some of the devices of group II.

L'installation selon l'invention, outre la diminution des coûts énergétiques, d'investissement et d'exploitation permet d'optimiser la disposition au sein de l'unité de production de métaux, de chacun desdits groupes I, II et III, ce de sorte à réduire la surface d'occupation aux sols et de diminuer les nuisances, notamment le niveau sonore global, de l'installation. En effet, l'installation selon l'invention, autorise la localisation du groupe I, généralement bruyant, en un seul et unique endroit choisi du site.The installation according to the invention, in addition to reducing the energy, investment and operating costs, makes it possible to optimize the arrangement within the metal production unit, of each of said groups I, II and III, so as to reduce the surface area occupied on the ground and to reduce pollution, in particular the overall noise level, of the installation. In fact, the installation according to the invention allows the location of group I, which is generally noisy, in a single chosen location on the site.

Quoique la présente invention ait été décrite en relation avec des modes de réalisation particuliers, elle ne s'en trouve pas limitée mais est au contraire susceptible de modifications et de variantes qui apparaîtront à l'homme de l'art. Notamment, I'intégration peut être réalisée de façon similaire, alternativement ou additionnellement, avec une unité de séparation de gaz de l'air du type à adsorption ou à perméation, produisant dans ce cas de l'oxygène sensiblement pur et/ou de l'azote sensiblement pur, en place et lieu d'une unité cryogénique telle que 9 ou en parallèle à cette dernière, les deux unités de séparation étant dans ce dernier cas alimentées par la même unité I, ainsi qu'avec des unités de production de métaux non ferreux, notamment le cuivre, le nickel, le zinc ou le plomb.Although the present invention has been described in relation to particular embodiments, it is not limited thereto but is on the contrary subject to modifications and variants which will appear to those skilled in the art. In particular, integration can be carried out in a similar manner, alternatively or additionally, with an air gas separation unit of the adsorption or permeation type, in this case producing substantially pure oxygen and / or l substantially pure nitrogen, in place and in place of a cryogenic unit such as 9 or in parallel with the latter, the two separation units being in the latter case supplied by the same unit I, as well as with production units for non-ferrous metals, including copper, nickel, zinc or lead.

De même, d'autres types de dispositifs de production ou de traitement de métal (1-6) peuvent être mis en oeuvre, tels des fours-poches, des unités de dégazage, de traitement de surfaces, de traitement de déphosphatation ou de désulfuration.Likewise, other types of metal production or treatment devices (1-6) can be used, such as pocket ovens, degassing units, surface treatment, dephosphating or desulfurization treatment. .

Claims (24)

Installation combinée d'au moins une unité de production d'au moins un métal (II) comprenant au moins un dispositif de production ou de traitement de métal (1-6) et d'au moins une unité de séparation de gaz de l'air (III) comprenant au moins une sortie (14-18) d'au moins un gaz de l'air, caractérisée en ce qu'elle comprend une unité de production d'air comprimé (I) ayant au moins une sortie (21, 22) reliée à l'unité de séparation (III) et audit dispositif (1-6) pour l'alimentation en air de l'unité de séparation (III) et dudit dispositif (1-6).Combined installation of at least one unit for producing at least one metal (II) comprising at least one device for producing or treating metal (1-6) and at least one unit for separating gas from the air (III) comprising at least one outlet (14-18) of at least one air gas, characterized in that it comprises a compressed air production unit (I) having at least one outlet (21 , 22) connected to the separation unit (III) and to said device (1-6) for supplying air to the separation unit (III) and said device (1-6). Installation selon la revendication 1, caractérisée en ce que l'unité de production d'air comprimé (I) comporte au moins un poste aval (20) de séchage de l'air comprimé.Installation according to claim 1, characterized in that the compressed air production unit (I) comprises at least one downstream station (20) for drying the compressed air. Installation selon la revendication 1 ou la revendication 2, caractérisée en ce qu'elle comprend au moins une conduite de fluide reliant la sortie (14-18) de l'unité de séparation (III) audit dispositif (1-6) pour la fourniture de gaz à ce dernier.Installation according to claim 1 or claim 2, characterized in that it comprises at least one fluid line connecting the outlet (14-18) of the separation unit (III) to said device (1-6) for the supply gas to the latter. Installation selon l'une des revendications 1 à 3, caractérisée en ce que le dispositif est un dispositif de tri de métaux (7).Installation according to one of claims 1 to 3, characterized in that the device is a metal sorting device (7). Installation selon l'une des revendications précédentes, caractérisée en ce que le dispositif est un four de fusion de métal (1).Installation according to one of the preceding claims, characterized in that the device is a metal melting furnace (1). Installation selon l'une des revendications précédentes, caractérisée en ce que le dispositif est un dispositif de traitement de métal fondu (2).Installation according to one of the preceding claims, characterized in that the device is a device for processing molten metal (2). Installation selon l'une des revendications précédentes, caractérisée en ce que le dispositif est un laminoir (5).Installation according to one of the preceding claims, characterized in that the device is a rolling mill (5). Installation selon la revendication 6, caractérisée en ce que le dispositif est un dispositif d'alimentation en métal (3 ; 4) du laminoir (5).Installation according to claim 6, characterized in that the device is a metal feed device (3; 4) of the rolling mill (5). Installation selon l'une des revendications précédentes, caractérisée en ce que le dispositif est un dispositif de réduction ou de pré-réduction de minerais (6).Installation according to one of the preceding claims, characterized in that the device is a device for reducing or pre-reducing ores (6). Installation selon l'une des revendications 3, 5, 6, 8, 9, caractérisée en ce que le gaz fourni au dispositif (1; 2 ; 4; 6) est de l'oxygène.Installation according to one of claims 3, 5, 6, 8, 9, characterized in that the gas supplied to the device (1; 2; 4; 6) is oxygen. Installation selon l'une des revendications 3 et 6 à 8, caractérisée en ce que le gaz fourni au dispositif (2-5) est de l'azote.Installation according to one of claims 3 and 6 to 8, characterized in that the gas supplied to the device (2-5) is nitrogen. Installation selon l'une des revendications 3 et 6 à 8, caractérisée en ce que le gaz fourni au dispositif (2, 3, 5) est de l'argon.Installation according to one of claims 3 and 6 to 8, characterized in that the gas supplied to the device (2, 3, 5) is argon. Installation selon l'une des revendications précédentes, caractérisée en ce que le dispositif (1, 6) comprend au moins un circuit de refroidissement (26, A ; C) dont au moins une partie est associée fonctionnellement (27; 13) à au moins un circuit de fluide (170; 12) de l'unité de séparation (III).Installation according to one of the preceding claims, characterized in that the device (1, 6) comprises at least one cooling circuit (26, A; C) at least part of which is functionally associated (27; 13) with at least a fluid circuit (170; 12) of the separation unit (III). Installation selon la revendication 13, caractérisée en ce que le circuit de refroidissement (A; C) comporte au moins une partie amont (26) en relation d'échange thermique (27) avec une conduite de gaz (170) produit par l'unité de séparation (III).Installation according to claim 13, characterized in that the cooling circuit (A; C) comprises at least one upstream part (26) in heat exchange relationship (27) with a gas line (170) produced by the unit separation (III). Installation selon l'une des revendications précédentes, caractérisée en ce que l'unité de production d'air comprimé (I) comprend au moins un circuit de refroidissement (26, B) dont au moins une partie est associée fonctionnellement (27 13) à au moins un circuit de fluide (170 ; 12) de l'unité de séparation (III).Installation according to one of the preceding claims, characterized in that the compressed air production unit (I) comprises at least one cooling circuit (26, B) at least part of which is functionally associated (27 13) with at least one fluid circuit (170; 12) of the separation unit (III). Installation selon l'une des revendications précédentes, caractérisé en ce que l'unité de séparation (III) est une unité cryogénique (9) reliée à l'unité de production d'air comprimé (I) via un poste d'épuration à adsorbant (13).Installation according to one of the preceding claims, characterized in that the separation unit (III) is a cryogenic unit (9) connected to the compressed air production unit (I) via an adsorbent purification station (13). Installation selon l'une des revendications 13 à 15 et la revendication 16, caractérisée en ce que le circuit de refroidissement à l'eau (A ; B; C) comporte une partie aval reliée au poste d'épuration (13) pour la régénération de son adsorbant.Installation according to one of claims 13 to 15 and claim 16, characterized in that the water cooling circuit (A; B; C) has a downstream part connected to the purification station (13) for regeneration of its adsorbent. Installation selon l'une des revendications précédentes, caractérisée en ce que le métal est de l'acier.Installation according to one of the preceding claims, characterized in that the metal is steel. Installation selon l'une des revendications 1 à 17, caractérisée en ce que le métal est un métal non ferreux.Installation according to one of claims 1 to 17, characterized in that the metal is a non-ferrous metal. Installation selon la revendication 16 ou la revendication 17, caractérisée en ce que l'unité de séparation (III) est du type cryogénique (9) avec une colonne moyenne pression (10) alimentée partiellement en air surcomprimé détendu dans une turbine (30).Installation according to claim 16 or claim 17, characterized in that the separation unit (III) is of the cryogenic type (9) with a medium pressure column (10) partially supplied with supercharged air expanded in a turbine (30). Installation selon la revendication 20, caractérisée en ce qu'elle comprend une ligne (34) d'air comprimé moyenne pression partant de l'aval de la turbine (30) pour fourniture à un poste utilisateur.Installation according to claim 20, characterized in that it comprises a line (34) of medium pressure compressed air leaving downstream of the turbine (30) for supply to a user station. Installation selon l'une des revendications précédentes, caractérisée en ce que l'unité de production d'air comprimé (I) comporte un train de compresseurs (19).Installation according to one of the preceding claims, characterized in that the compressed air production unit (I) comprises a train of compressors (19). Installation selon la revendication 22, caractérisée en ce qu'au moins une partie du train de compresseurs (19) est entraîné par un dispositif d'entraînement actionné par de la vapeur d'eau.Installation according to claim 22, characterized in that at least part of the compressor train (19) is driven by a drive device actuated by steam. Installation selon la revendication 23, caractérisée en ce qu'elle comprend un réseau de vapeur d'eau (E) dont au moins une partie est en relation d'échange thermique avec le dispositif (1-6).Installation according to claim 23, characterized in that it comprises a network of water vapor (E) at least part of which is in heat exchange relation with the device (1-6).
EP94402427A 1993-11-12 1994-10-27 Combined installation of a metal production unit and a separation unit of gases from air Revoked EP0653599B1 (en)

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EP0767349A2 (en) * 1995-10-04 1997-04-09 Air Products And Chemicals, Inc. The use of nitrogen from an air separation plant in carbon dioxide removal from a feed gas to a further process
EP0767349A3 (en) * 1995-10-04 1998-01-14 Air Products And Chemicals, Inc. The use of nitrogen from an air separation plant in carbon dioxide removal from a feed gas to a further process
WO1997039298A1 (en) * 1996-04-15 1997-10-23 The Boc Group Plc Air separation apparatus
US6189337B1 (en) 1996-04-15 2001-02-20 The Boc Group Plc Air separation apparatus
FR2753638A1 (en) * 1996-09-25 1998-03-27 Air Liquide PROCESS FOR SUPPLYING A GAS CONSUMER UNIT
EP0833120A1 (en) * 1996-09-25 1998-04-01 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for supplying gas to a consumption unit
US6062043A (en) * 1996-09-25 2000-05-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for feeding a gas-consuming unit
EP3771872A1 (en) * 2019-08-02 2021-02-03 Linde GmbH Method and system for providing a natural gas product

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JPH07239193A (en) 1995-09-12
FR2712383A1 (en) 1995-05-19
KR950013628A (en) 1995-06-15
CA2135568C (en) 2005-10-11
AU685164B2 (en) 1998-01-15
EP0653599B1 (en) 1997-11-19
CN1080866C (en) 2002-03-13
DE69406895D1 (en) 1998-01-02
US5538534A (en) 1996-07-23
USRE37014E1 (en) 2001-01-16
FR2712383B1 (en) 1995-12-22
CA2135568A1 (en) 1995-05-13
DE69406895T2 (en) 1998-04-30
AU7770894A (en) 1995-05-18
ZA948834B (en) 1995-07-13
CN1105752A (en) 1995-07-26
KR100332078B1 (en) 2002-11-27
ES2109639T3 (en) 1998-01-16

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