EP1188843B1 - Procédé et installation d'alimentation en air enrichi en oxygène d'une unité de production de métal non-ferreux - Google Patents
Procédé et installation d'alimentation en air enrichi en oxygène d'une unité de production de métal non-ferreux Download PDFInfo
- Publication number
- EP1188843B1 EP1188843B1 EP01402174A EP01402174A EP1188843B1 EP 1188843 B1 EP1188843 B1 EP 1188843B1 EP 01402174 A EP01402174 A EP 01402174A EP 01402174 A EP01402174 A EP 01402174A EP 1188843 B1 EP1188843 B1 EP 1188843B1
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- European Patent Office
- Prior art keywords
- air
- oxygen
- converter
- compressor
- enriched
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- 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.)
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
- C22B15/003—Bath smelting or converting
- C22B15/0041—Bath smelting or converting in converters
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- 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
- F25J3/04084—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 nitrogen
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- 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
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- 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
- F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
- F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
- F25J3/04206—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product
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- 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
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
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- 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
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- 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
- F25J3/04472—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages
- F25J3/04496—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist
- F25J3/04503—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems
- F25J3/04509—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 the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist by exchanging "cold" between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems within the cold part of the air fractionation, i.e. exchanging "cold" within the fractionation and/or main heat exchange line
- F25J3/04515—Simultaneously changing air feed and products output
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- 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
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- 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
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- 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
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- 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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/40—One fluid being air
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- 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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
- F25J2250/50—One fluid being oxygen
Definitions
- the present invention relates to a method for supplying enriched air in oxygen from a non-ferrous metal production unit, comprising, share, an ore concentrate smelting unit of said metal supplied by continuous injection of oxygen-enriched air, on the other hand, a conversion unit mattes from the melting unit, fed by variable-rate injection of oxygen-enriched air, and to an installation for the implementation of this process.
- the invention applies in particular to the production of copper.
- Copper production units are conventionally made up of a continuous operation melter, such as a Flash oven, a Noranda oven or a Teniente oven, and a discontinuous conversion unit such as a Pierce converter or a Hoboken converter.
- a continuous operation melter such as a Flash oven, a Noranda oven or a Teniente oven
- a discontinuous conversion unit such as a Pierce converter or a Hoboken converter.
- the raw material composed of copper ore concentrate, is charged in the melting unit, in which it is enriched with copper.
- a mixture rich in copper called matte, containing about 60 to 70% in weight of copper.
- This matte is then further enriched in copper in the unit of conversion and is transformed into copper known as "blister" containing approximately 99% of copper.
- the bag When the bag is emptied, a slight flow of air is enriched with oxygen to maintain the flame of the burners of the conversion unit.
- the rate oxygen enrichment of the air depends on the composition of the material first and expected production. Generally the air flow supplying the melting unit is enriched with up to 28% oxygen and the air flow feeding the unit conversion is enriched with 50 to 60% oxygen.
- each unit has an air blower whose air flow is enriched by injecting oxygen produced by an installation independent of the two air blowers.
- the consumption of oxygen-enriched air in the melting unit being constant, the air blower connected to the fuser constantly produces a air flow corresponding to the maximum flow of the copper production cycle.
- the consumption of oxygen-enriched air in the conversion unit being variable, the difference between the air flow produced by the blower connected to the conversion unit, which operates continuously, and the one consumed by this unit conversion is generally vented.
- the oxygen production installation consists of a compressor air and an air separation unit capable of delivering a variable flow oxygen, to enrich the blower air flow with a constant flow of oxygen of the melting unit, and enriching the unit's air flow with a variable oxygen flow conversion.
- Compressor here means a compressor proper or several compressors mounted in parallel and having a common discharge.
- This process for producing oxygen-enriched air by an installation comprising two independent air blowers connected to a oxygen production has various drawbacks such as congestion significant, significant energy consumption, as well as a loss significant energy due to the venting of air supplied by one of the blowers.
- the invention therefore aims to provide a method and a supply system for oxygen-enriched air from a production unit non-ferrous metal, which involves a reduced bulk and which allows significantly reduce energy costs.
- the invention essentially consists in combining the production of air and oxygen in order to produce more economically oxygen-enriched air to supply the melting unit and the conversion unit a non-ferrous metal production unit.
- a copper production plant which includes a single air compressor 1 with three levels of compression (i.e. for example 4 or 5 stages) respectively supplying compressed air to a firstly a fusion unit 2 via a first pipe 3, secondly a air separation 4 via a second line 5, and finally, a conversion unit 6 or a buffer tank 7 via a third pipe 8.
- the separation unit air 4 producing oxygen has two separate output circuits delivering oxygen at different pressures, one 9 supplying the melting unit 2, the other 10 supplying the conversion unit 6. Each circuit 9, 10 has a flow rate constant.
- Buffer 7 is capable of storing compressed air as well as the oxygen of the second circuit 10 when the consumption of air enriched in oxygen in conversion unit 6 is low, i.e. below a threshold predetermined.
- An expansion valve 11, constituted by a pressure regulator downstream, is placed on a line 12 which connects the conversion unit and the buffer capacity 7, so that the oxygen-enriched air flow circulates in the circuit 12 and either injected into the conversion unit 6, when the consumption of this unit 6 is high, that is to say greater than said threshold.
- Figure 2 differs from the previous one in that the unit air separation unit 4 is here equipped with a so-called “toggle” system, described below, allowing to deliver a variable flow of oxygen to the conversion unit 6 while unit 4 processes a constant air flow.
- the expansion valve 11 is placed between the capacity 7 and the point 13 of arrival of the oxygen produced by the circuit 10 on line 12 for supply of enriched air to the conversion unit 6.
- Part of the air from one of the following compression levels (e.g. example, the second level of compression) of compressor 1 goes into the air separation unit 4.
- This provides on the one hand a flow of oxygen 9 to a pressure from 1.2 to 1.7 bar supplying the fuser 2, and on the other hand a second oxygen flow 10 at a pressure of 5 to 10 bars intended for the conversion unit 6.
- the rest 8 of the compressed air is extracted from the last stage of compressor 1 at a pressure of about 5 to 10 bars and is combined with the oxygen flow 10 above.
- the air enriched thus obtained feeds either buffer capacity 7 when consumption in enriched air is low, i.e. the conversion unit 6 through the expansion valve 11 when the consumption of enriched air is high.
- the air separation unit 4 provides a first flow of oxygen 9 at constant flow rate at a pressure of 1.2 to 1.7 bar, feeding the melting unit 2. It also provides a second flow of oxygen 10 to a pressure of approximately 1.5 bar which feeds the conversion unit 6, a rocker being provided to supply oxygen at a variable rate depending on the consumption of enriched air from the conversion unit 6.
- the rest 8 of the compressed air is extracted from the last stage of the compressor at a pressure of around 5 to 10 bars.
- this air is partially stored in the buffer capacity 7.
- an air flow equal to the difference between the enriched air flow required by the conversion unit 6 and the oxygen flow 10 through the expansion valve.
- the air produced by the air compressor and feeding the air separation unit and the capacity 7 is at a pressure corresponding to an economic optimum and energy between the energy spent on air compression and the cost corresponding to the investment of the buffer capacity allowing the supply discontinuous in enriched air from the conversion unit.
- the air pressure produced by the air compressor to supply the air separation unit is preferably 5 to 6 bar, and the air pressure produced by the air compressor to supply the gas capacity is preferably from 5 to 10 bars.
- the double column 23 is of the minaret type and has a medium pressure column 26 surmounted by a low pressure column 27, this extending upwards by a short distillation section or minaret 28 of smaller diameter.
- a vaporizer-condenser main 29 puts the overhead vapor (approximately pure nitrogen) from the column 26 in indirect heat exchange relationship with the tank liquid (liquid oxygen) from column 27.
- the double column 23 produces at constant flow rates of liquid oxygen 31 in the tank of the column 27, low pressure nitrogen gas 32 at the head of minaret 28, and medium pressure liquid nitrogen 33 at the head of medium pressure column 26.
- the liquid oxygen withdrawn from the low pressure column is stored in the buffer capacity 21 and, from there, is compressed to the pressure of circuit 10 by the pump 20, then sprayed against the current with a constant flow of air overpressed in 16.
- the air thus liquefied is, after expansion at medium pressure in an expansion valve 34, stored in the buffer capacity 22 before being partly introduced in the liquid state in the lower part of column 26 and, for the rest, relaxed at low pressure in an expansion valve 35 and introduced at an intermediate level of column 27.
- Unit 4 also produces a constant flow of gaseous oxygen for the circuit 9, for example from another oxygen withdrawal line 36 liquid from column 27, then vaporization / reheating at 15 and possibly compression of the resulting gaseous oxygen.
- Unit 4 still produces a low pressure nitrogen gas flow from minaret 28 and heated in 24 then in 15, as well as a high nitrogen gas flow pressure obtained by pumping medium pressure liquid nitrogen at 25 then by vaporization / reheating in 15. These two nitrogen streams serve for inerting and / or conveying in the copper production facility.
- the turbo-compressor group 18.19 operating by overpressure and expansion of part of the incoming air, used to keep the unit cool 4.
- An air separation unit like the one in Figure 3 provides a rate of variation of the oxygen flow produced at 10 which is typically of around 5% per minute.
- the invention can also be applied to the production of metals non-ferrous other than copper, such as nickel.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Description
- on injecte de l'air enrichi en oxygène dans l'unité de conversion pendant environ une heure ;
- on stoppe l'injection, on retire le laitier surnageant à la surface du cuivre liquide, on vide la poche pour récupérer le cuivre, à la suite de quoi on recharge de mattes la poche et on recommence un nouveau cycle.
- l'on comprime la totalité de l'air dans un compresseur unique susceptible d'alimenter l'unité de fusion et l'unité de conversion ;
- l'on traite une partie de cet air comprimé dans une unité de séparation d'air pour obtenir deux flux d'oxygène qu'on injecte respectivement dans l'air comprimé destiné à alimenter l'unité de fusion et dans l'air comprimé destiné à alimenter l'unité de conversion ;et
- l'on stocke de l'air comprimé ou de l'air comprimé enrichi en oxygène destiné à l'unité de conversion dans une capacité-tampon lorsque la consommation en air enrichi en oxygène de l'unité de conversion est inférieure à un seuil déterminé, et l'on prélève de l'air comprimé ou de l'air comprimé enrichi en oxygène dans la capacité-tampon lorsque la consommation en air enrichi en oxygène de l'unité de conversion est supérieure audit seuil ;
- on alimente l'unité de fusion en mélangeant de l'air comprimé par le premier niveau de compression du compresseur avec de l'oxygène produit par l'unité de séparation d'air sensiblement à la même pression ;
- on alimente l'unité de séparation d'air avec de l'air comprimé par un niveau de compression du compresseur situé derrière le premier niveau de compression de ce compresseur ;
- on alimente l'unité de conversion en mélangeant de l'air comprimé par le compresseur à une pression supérieure à la pression d'alimentation de cette unité de conversion avec de l'oxygène produit par l'unité de séparation d'air sensiblement à la même pression, en stockant l'air enrichi en oxygène dans ladite capacité-tampon lorsque la consommation en air enrichi en oxygène par l'unité de conversion est inférieure audit seuil, et en prélevant de l'air enrichi en oxygène dans cette capacité-tampon à travers un organe de détente lorsque la consommation en air enrichi en oxygène par l'unité de conversion est supérieure audit seuil.
- on stocke de l'air comprimé par le dernier étage du compresseur à une pression supérieure à la pression d'alimentation de l'unité de conversion dans ladite capacité-tampon lorsque la consommation en air enrichi en oxygène par cette unité de conversion est inférieure audit seuil, et on alimente l'unité de conversion en mélangeant de l'air stocké dans la capacité-tampon et/ou de l'air comprimé par le dernier étage du compresseur, prélevés à travers un organe de détente, avec de l'oxygène produit par l'unité de séparation d'air à un débit variable et à une pression sensiblement égale à la pression d'alimentation de l'unité de conversion ;
- l'air destiné à l'unité de conversion est comprimé par le dernier étage du compresseur.
- une unité de séparation d'air adaptée pour fournir de l'oxygène aux unités de fusion et de conversion ;
- un compresseur d'air unique dont le refoulement est relié à l'unité de fusion, à l'unité de séparation d'air et à l'unité de conversion par des première, deuxième et troisième conduite respectivement ; et
- une capacité-tampon reliée à ladite troisième conduite.
- la capacité-tampon est également reliée d'une part à une sortie d'oxygène de l'unité de séparation destinée à l'unité de conversion et d'autre part à cette unité de conversion à travers un organe de détente. La capacité tampon est également reliée à l'unité de conversion à travers un organe de détente et une sortie d'oxygène de l'unité de séparation destinée à l'unité de conversion débouche dans la conduite qui relie cet organe de détente à l'unité de conversion ;
- l'unité de séparation d'air comporte deux circuits de production d'oxygène, l'un alimentant l'unité de fusion, l'autre l'unité de conversion ;
- le circuit de production d'oxygène alimentant l'unité de conversion est muni de moyens de réglage du débit d'oxygène ;
- l'unité de séparation d'air comprimé est une unité de distillation d'air à double colonne qui comporte un système à bascule afin de produire un flux d'oxygène variable par distillation d'un débit d'air constant ;
- le compresseur d'air comprend au moins deux niveaux de compression, le refoulement du premier niveau étant relié à ladite première conduite et celui du ou des niveaux suivants étant reliés auxdites deuxième et troisième conduite ;
- le compresseur comporte trois niveaux de compression dont les refoulements sont reliés respectivement auxdites première, deuxième et troisième conduites.
- la Figure 1 représente schématiquement une installation de production d'air enrichi en oxygène alimentant une unité de fusion et une unité de conversion de cuivre ; et
- la Figure 2 représente une alternative de l'installation de la Figure 1 ; et
- la Figure 3 représente une unité de séparation d'air destinée à l'installation de la Figure 2.
Claims (14)
- Procédé d'alimentation en air enrichi en oxygène d'une unité de production de métal non ferreux, comprenant, d'une part, une unité de fusion (2) de concentré de minerai dudit métal alimentée par injection continue d'air enrichi en oxygène, d'autre part, une unité de conversion (6) des mattes issues de l'unité de fusion, alimentée par injection à débit variable d'air enrichi en oxygène, caractérisé en ce que:l'on comprime la totalité de l'air dans un compresseur (1) unique susceptible d'alimenter l'unité de fusion (2) et l'unité de conversion (6) ;l'on traite une partie de cet air comprimé dans une unité de séparation d'air (4) pour obtenir deux flux d'oxygène (9, 10) qu'on injecte respectivement dans l'air comprimé destiné à alimenter l'unité de fusion (2) et l'unité de conversion (6) ; etl'on stocke de l'air comprimé ou de l'air comprimé enrichi en oxygène destiné à l'unité de conversion (6) dans une capacité-tampon (7) lorsque la consommation en air enrichi en oxygène de l'unité de conversion est inférieure à un seuil prédéterminé, et l'on prélève de l'air comprimé ou de l'air comprimé enrichi en oxygène dans la capacité-tampon (7) lorsque la consommation en air enrichi en oxygène de l'unité de conversion (6) est supérieure audit seuil.
- Procédé selon la revendication 1, caractérisé en ce que l'on alimente l'unité de fusion (2) en mélangeant de l'air comprimé par le premier niveau de compression du compresseur (1) avec de l'oxygène produit par l'unité de séparation d'air (4) sensiblement à la même pression .
- Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on alimente l'unité de séparation d'air (4) avec de l'air comprimé par un niveau de compression du compresseur (1) situé derrière le premier niveau de compression de ce compresseur.
- Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'on alimente l'unité de conversion (6) en mélangeant de l'air comprimé par le compresseur (1) à une pression supérieure à la pression d'alimentation de cette unité de conversion (6) avec de l'oxygène produit par l'unité de séparation d'air (4) sensiblement à la même pression, en stockant l'air enrichi en oxygène dans ladite capacité-tampon (7) lorsque la consommation en air enrichi en oxygène par l'unité de conversion (6) est inférieure audit seuil, et en prélevant de l'air enrichi en oxygène dans cette capacité-tampon (7) à travers un organe de détente (11) lorsque la consommation en air enrichi en oxygène par l'unité de conversion (6) est supérieure audit seuil.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on stocke de l'air comprimé par le dernier étage du compresseur (1) à une pression supérieure à la pression d'alimentation de l'unité de conversion (6) dans ladite capacité-tampon (7) lorsque la consommation en air enrichi en oxygène par cette unité de conversion (5) est inférieure audit seuil, et l'on alimente l'unité de conversion en mélangeant de l'air stocké dans la capacité-tampon (7) et/ou de l'air comprimé par le dernier étage du compresseur (1), prélevés à travers un organe de détente (11), avec de l'oxygène produit par l'unité de séparation d'air (4) à un débit variable et à une pression sensiblement égale à la pression d'alimentation de l'unité de conversion (6).
- Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'air destiné à l'unité de conversion (6) est comprimé par le dernier étage du compresseur (1).
- Installation d'alimentation en air enrichi en oxygène d'une unité de production de métal non ferreux comprenant une unité de fusion (2) et une unité de conversion (6) pour la mise en oeuvre d'un procédé selon l'une quelconque des revendications 1 à 6, comprenant :une unité de séparation d'air (4) adaptée pour fournir de l'oxygène aux unités de fusion (2) et de conversion (6) ;un compresseur d'air (1) unique dont le refoulement est relié à l'unité de fusion (2), à l'unité de séparation d'air (4) et à l'unité de conversion (6) par des première, deuxième et troisième conduites (3, 5, 8); etune capacité-tampon (7) reliée à ladite troisième conduite (8).
- Installation d'alimentation selon la revendication 7, caractérisée en ce que la capacité-tampon (7) est également reliée d'une part à une sortie d'oxygène (10) de l'unité de séparation (4) destinée à l'unité de conversion (6), et d'autre part à cette unité de conversion (6) à travers un organe de détente (11).
- Installation d'alimentation selon la revendication 7 , caractérisée en ce que la capacité-tampon (7) est également reliée à l'unité de conversion (6) à travers un organe de détente (11), et en ce qu'une sortie d'oxygène de l'unité de séparation (4) destinée à l'unité de conversion (6) débouche dans la conduite (12) qui relie cet organe de détente à l'unité de conversion (6).
- Installation d'alimentation selon l'une quelconque des revendications 7 à 9, caractérisée en ce que l'unité de séparation d'air (4) comporte deux circuits de production d'oxygène, l'un (9) alimentant l'unité de fusion (2), l'autre (10) alimentant l'unité de conversion (6).
- Installation d'alimentation selon les revendications 9 et 10 prises ensemble, caractérisée en ce que le circuit de production d'oxygène alimentant l'unité de conversion (6) est muni de moyens de réglage (20) du débit d'oxygène.
- Installation d'alimentation selon la revendication 11, caractérisée en ce que l'unité de séparation d'air (4) est une unité de distillation d'air à double colonne qui comporte un système à bascule (16, 20 à 22) afin de produire un flux d'oxygène variable par distillation d'un débit d'air constant.
- Installation d'alimentation selon l'une quelconque des revendications 7 à 12, caractérisée en ce que le compresseur d'air (1) comprend au moins deux niveaux de compression, le refoulement du premier niveau étant relié à ladite première conduite (3) et celui du ou des niveaux suivants étant reliés auxdites deuxième et troisième conduites (5, 8).
- Installation d'alimentation selon la revendication 13, caractérisée en ce que le compresseur (1) comporte trois niveaux de compression dont les refoulements sont reliés respectivement auxdites première, deuxième et troisième conduites.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0011878 | 2000-09-18 | ||
FR0011878A FR2814178B1 (fr) | 2000-09-18 | 2000-09-18 | Alimentation en air enrichi en oxygene d'une unite de production de metal non-ferreux |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1188843A1 EP1188843A1 (fr) | 2002-03-20 |
EP1188843B1 true EP1188843B1 (fr) | 2004-05-19 |
Family
ID=8854412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01402174A Expired - Lifetime EP1188843B1 (fr) | 2000-09-18 | 2001-08-14 | Procédé et installation d'alimentation en air enrichi en oxygène d'une unité de production de métal non-ferreux |
Country Status (9)
Country | Link |
---|---|
US (1) | US6576040B2 (fr) |
EP (1) | EP1188843B1 (fr) |
JP (1) | JP2002155321A (fr) |
CN (1) | CN1227380C (fr) |
AU (1) | AU773575B2 (fr) |
CA (1) | CA2357371A1 (fr) |
DE (1) | DE60103339T2 (fr) |
FR (1) | FR2814178B1 (fr) |
ZA (1) | ZA200107030B (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2842124B1 (fr) * | 2002-07-09 | 2005-03-25 | Air Liquide | Procede de conduite d'une installation de production de gaz alimentee en electricite et cette installation de production |
FR2853407B1 (fr) * | 2003-04-02 | 2012-12-14 | Air Liquide | Procede et installation de fourniture de gaz sous pression |
FR2862004B3 (fr) * | 2003-11-10 | 2005-12-23 | Air Liquide | Procede et installation d'enrichissement d'un flux gazeux en l'un de ses constituants |
FR2862128B1 (fr) * | 2003-11-10 | 2006-01-06 | Air Liquide | Procede et installation de fourniture d'oxygene a haute purete par distillation cryogenique d'air |
CN102168804B (zh) * | 2011-02-11 | 2012-10-10 | 安徽淮化股份有限公司 | 一种富氧空气配送设备 |
TWI480814B (zh) * | 2012-01-13 | 2015-04-11 | China Steel Corp | 氧氣生產決策支援系統 |
JP6115887B2 (ja) * | 2013-03-15 | 2017-04-19 | 住友金属鉱山株式会社 | 酸素圧縮機切替流量測定方法 |
JP6575499B2 (ja) * | 2016-12-15 | 2019-09-18 | Jfeスチール株式会社 | 製鉄プロセスにおける酸素供給装置およびその方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1296616A1 (ru) * | 1985-10-14 | 1987-03-15 | Государственный Научно-Исследовательский Институт Автоматизации Производственных Процессов Химической Промышленности И Цветной Металлургии | Способ конвертировани медных штейнов |
US5194213A (en) * | 1991-07-29 | 1993-03-16 | Inco Limited | Copper smelting system |
FR2680114B1 (fr) * | 1991-08-07 | 1994-08-05 | Lair Liquide | Procede et installation de distillation d'air, et application a l'alimentation en gaz d'une acierie. |
FR2712383B1 (fr) * | 1993-11-12 | 1995-12-22 | Air Liquide | Installation combinée d'une unité de production de métal et d'une unité de séparation de l'air. |
FR2745821B1 (fr) * | 1996-03-11 | 1998-04-30 | Air Liquide | Procede de conduite d'une installation comprenant une unite de traitement de metal et une unite de traitement de gaz |
FR2753638B1 (fr) * | 1996-09-25 | 1998-10-30 | Procede pour l'alimentation d'une unite consommatrice d'un gaz | |
FR2774157B1 (fr) * | 1998-01-23 | 2000-05-05 | Air Liquide | Installation combinee d'un four et d'un appareil de distillation d'air et procede de mise en oeuvre |
JPH11335751A (ja) * | 1998-05-22 | 1999-12-07 | Mitsui Mining & Smelting Co Ltd | 銅転炉の操業方法 |
-
2000
- 2000-09-18 FR FR0011878A patent/FR2814178B1/fr not_active Expired - Fee Related
-
2001
- 2001-08-14 EP EP01402174A patent/EP1188843B1/fr not_active Expired - Lifetime
- 2001-08-14 DE DE60103339T patent/DE60103339T2/de not_active Expired - Fee Related
- 2001-08-24 ZA ZA200107030A patent/ZA200107030B/xx unknown
- 2001-08-30 AU AU65567/01A patent/AU773575B2/en not_active Ceased
- 2001-09-13 CA CA002357371A patent/CA2357371A1/fr not_active Abandoned
- 2001-09-17 CN CN01133055.4A patent/CN1227380C/zh not_active Expired - Fee Related
- 2001-09-17 JP JP2001281460A patent/JP2002155321A/ja not_active Withdrawn
- 2001-09-18 US US09/953,944 patent/US6576040B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2357371A1 (fr) | 2002-03-18 |
AU6556701A (en) | 2002-03-21 |
CN1348015A (zh) | 2002-05-08 |
FR2814178B1 (fr) | 2002-10-18 |
AU773575B2 (en) | 2004-05-27 |
ZA200107030B (en) | 2002-02-25 |
JP2002155321A (ja) | 2002-05-31 |
CN1227380C (zh) | 2005-11-16 |
DE60103339D1 (de) | 2004-06-24 |
EP1188843A1 (fr) | 2002-03-20 |
US20020033566A1 (en) | 2002-03-21 |
US6576040B2 (en) | 2003-06-10 |
FR2814178A1 (fr) | 2002-03-22 |
DE60103339T2 (de) | 2005-04-14 |
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