EP0922773A1 - Procédé et dispositif pour le transport pneumatique de matériau en vrac dans un four de fusion métallique - Google Patents

Procédé et dispositif pour le transport pneumatique de matériau en vrac dans un four de fusion métallique Download PDF

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Publication number
EP0922773A1
EP0922773A1 EP98121213A EP98121213A EP0922773A1 EP 0922773 A1 EP0922773 A1 EP 0922773A1 EP 98121213 A EP98121213 A EP 98121213A EP 98121213 A EP98121213 A EP 98121213A EP 0922773 A1 EP0922773 A1 EP 0922773A1
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EP
European Patent Office
Prior art keywords
pressure vessel
pressure
bulk material
feed
pneumatic
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.)
Withdrawn
Application number
EP98121213A
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German (de)
English (en)
Inventor
Lutz Klaus Kaiser
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.)
ThyssenKrupp Steel Europe AG
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
ThyssenKrupp Stahl AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Krupp Polysius AG, ThyssenKrupp Stahl AG filed Critical Krupp Polysius AG
Publication of EP0922773A1 publication Critical patent/EP0922773A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • C21B5/023—Injection of the additives into the melting part

Definitions

  • the invention relates to a method and a System for the pneumatic conveying and blowing of bulk material that is difficult to flow and tends to solidify, especially of essentially granular plastic material, Secondary material or the like, in at least one metallurgical smelting reactor, accordingly according to the preamble of claim 1 or the generic term of claim 8.
  • Suitable waste plastics e.g. packaging cups, Plastic films and the like.
  • these substances are supposed to be crushed, shredded and / or thermal processing to a particle size from about 1 to 10 mm, in particular about 5 mm, processed and then introduced into an injection or pressure vessel become.
  • This is prepared in this pressure vessel Bulk plastic by blowing one Fluidizing gas (by means of a blower and over Lines) fluidized, discharged at the lower end and a separate metering device, e.g. a mechanical one Screw dosing device, supplied from where dosed into a pneumatic conveyor pipe fed in and blowing points in the form of lances is required, via which it is gassed in the Blast furnace is blown in, the prevailing in the blast furnace Back pressure must be overcome.
  • a separate metering device e.g. a mechanical one Screw dosing device
  • the invention is based on the object of a method according to the preamble of claim 1 and a system according to the preamble of the claim 8 in such a way that with reliable dosing of the bulk material as well as with a relatively small construction Effort also relatively coarse Bulk goods of various types reliably pneumatic conveyed and into a metallurgical smelting reactor can be blown.
  • the bulk material in particular plastic material, secondary recyclable material or the like, initially in essentially fine to coarse-grained condition using a combined discharge and metering device mechanically the lower end or lower part of the pressure vessel conveyed out and dosed into the pneumatic conveying pipeline fed.
  • a combined discharge and metering device mechanically the lower end or lower part of the pressure vessel conveyed out and dosed into the pneumatic conveying pipeline fed.
  • melting reactor, Delivery pipeline, discharge and dosing element as well Pressure vessel with the formation of an open pressure system connected with each other. And at least between the upper end or upper part of the pressure vessel and the good feed point into the conveyor pipeline automatic pressure compensation established.
  • This combined discharge and dosing device thus works within the Pressure vessel in the full bulk so that it is this Bulk material loosens in an advantageous manner and thereby a risk of constipation, for example through Bridging, effectively countered.
  • This handling of relative coarse-grained material has the further advantage with the fact that crushing, shredding, agglomeration or other processing with a - compared to the known method described above - relative low system and process costs are operated can.
  • this method according to the invention also form Melting reactor, production pipeline, discharge and Dosing device and pressure vessel an open pressure system, and this is at least between the top of the Pressure vessel and the feed point into the delivery pipeline automatic pressure compensation is established.
  • This can be the pressure vessel and the feed point the delivery pipeline by an appropriate Pressure equalization line to be connected.
  • Can within the mentioned open printing system equalize pressures unhindered by gas flows in all directions depending on the current Pressure ratios are allowed.
  • the bulk material inside the pressure vessel allows at least because of it partial coarseness and the associated high gas permeability of the bulk material an unimpeded gas exchange within the actual Blowing apparatus with pressure vessel, discharge and Dosing device and pneumatic delivery pipeline. Of the Conveying pressure for pneumatic conveying arises automatically to the required pressure level on.
  • the corresponding bulk material can also be used a grain or piece size of up to about 25 mm conveyed and blown into the melting reactor.
  • this can Bulk at least partially in the form of agglomerates or pellet processed plastic material used and as a reducing agent in a molten metal be blown in.
  • Metallurgical smelting reactors in the sense of the present Blast furnaces, electric furnaces, cupola furnaces, Reactors for direct reduction (e.g. shaft, rotary tube and Fluidized bed furnaces) and reactors for smelting reduction (e.g. meltdown gasifier, iron bath reactors) be.
  • reactors for smelting reduction e.g. meltdown gasifier, iron bath reactors
  • Bulk goods are used in the melting of pig iron mainly raw material (for the generation of reducing gas) and to a certain extent thermally (release of heat). It is therefore a matter of reducing substances or reduction substitutes that - as above mentioned - especially from collected, sorted and appropriately processed secondary materials become. With the method according to the invention these bulk goods an economical and ecological reasonable recovery supplied.
  • a system according to the invention in particular for Implementation of the invention described above
  • the process is determined or designed through the sensible combination of the characteristics of the Claim 8 specified features.
  • the mechanical is particularly advantageous here Discharge and dosing device like a dosing screw trained with adjustable speed drive.
  • Fig.1 System serves - like the examples according to Fig. 2 and 3 described later - generally for pneumatic Pumping and blowing in hard flowing and bulk material that tends to solidify described type in at least one metallurgical Melting reactor 1, for example - as indicated in Fig.1 - Formed by a blast furnace or the like becomes.
  • This plant i.e. the system example according to Fig.1, contains approximately similar to a known pressure vessel conveyor formed pressure vessel 2 with an upper End 2a and a lower end 2b.
  • This pressure vessel 2 has an essentially cylindrical, upright Circumferential wall 3 and an upward, outwardly curved Top wall 3a and one that is curved downwards and outwards Bottom wall 3b, the top wall and bottom wall being fixed the peripheral wall 3 are connected and with this Form pressure vessel 2.
  • On the upper top wall 3a of the Pressure vessel 2 is provided with a shut-off valve 4 Feed pipe 5 connected, the other, upper end with a goods feed lock, container-like pressure lock 6 is connected. That on this way connected to the pressure lock 6 upper End 2a of the pressure vessel 2 is also connected to a compressed gas line 14a connected.
  • the lower end closed off by the bottom wall 3b 2b of the pressure vessel 2 has a product outlet opening 2b ' with which a mechanical to be explained in more detail later Discharge and metering element 8 of a metering device communicates.
  • Fig. 1 lets stand in this plant the melting reactor 1, the delivery pipe 9, the discharge and metering element 8 and the pressure vessel 2 to form an open Printing system in connection with each other, i.e. within This pressure system can pressures unhindered compensate (as already partially mentioned above).
  • a suitable compressed gas or Compressed air source 10 to which the above mentioned Compressed gas line 14a and the pneumatic Delivery pipeline 9 via another compressed gas line 14 is connected which is a suitable flow control valve 15 contains.
  • the pneumatic delivery pipeline 9 is on the one hand via the mechanical discharge and metering device 8 of the metering device with the good outlet opening 2b 'of the pressure vessel 2 and on the other hand with at least one blowing point, preferably with several Injection points 1a, 1b, 1c, at the counterpressure metallurgical melting reactor 1 connected.
  • this pneumatic conveying pipeline 9 at least one multi-way distributor 11 installed, which is any suitable and known from practice Execution, i.e.
  • the distributor can be both static (without moving parts) and also dynamic (with movable fittings) be. From this multi-way distributor 11 leads then a corresponding number of branch conveyor lines 9a, 9b, 9n to each one blowing point 1a, 1b, 1c of the associated melting reactor 1.
  • the dosing device contains at least one combined mechanical discharge and metering element 8, the designed as a metering screw conveyor or metering screw 8 is.
  • This dosing screw 8 has one in the lower end 2b of the pressure vessel 2 protruding inner End section 8a and one outside the pressure vessel 2 located outer end portion 8b, the with the good feed point 12 of the pneumatic conveying pipeline 9 is connected.
  • the dosing screw is useful 8 motorized by a drive device 13 driven, their speed adjustable is the discharge and dosing performance of this dosing screw 8 to be able to control.
  • the pneumatic Delivery pipe 9 after the multi-way distributor 11 contains a plurality of branch conveyor lines 9a, 9b, 9n, each for one injection point 1a, 1b, 1c of the melting reactor 1 lead, it is appropriate to each of these branch conveyor lines one with a flow control valve (As indicated) provided compressed gas sub-line 19a or 19b or 19n to connect to a uniform Distribution of the bulk material to be conveyed to each branch conveyor To be able to ensure 9a, 9b, 9n.
  • These compressed gas sub-lines 19a, 19b, 19n are over a compressed gas line 19 also with the compressed gas source 10 connected.
  • This pressurized gas source 10 thus serves for common care (with appropriate branching) the compressed gas line 14a, the compressed gas line 14 and if necessary also the further compressed gas line 19th
  • the corresponding delivery pressure can thus change set correctly that the pressure vessel 2, the dosing screw 8 and the pneumatic conveyor pipe 9 with their feed housing 12 under pressure equalization in the Open printing system mentioned above are integrated.
  • the Pressure vessel 2 automatically forms an overpressure, to overcome the back pressure in the melting reactor 1.
  • Quantities of compressed gas are fed in through the flow control valve 15 set.
  • the dosing screw 8 it is also expedient if at least its outer End section 8b is a substantially pressure-tight, tubular Has screw housing 8b ', which - as in Fig.1 can be seen - in the feed housing 12 laterally flows directly. It also opens into this feeder housing 12 essentially from above the pressure compensation line 7, and further to this Feed housing 12 the feed end of the pneumatic Delivery pipe 9 - preferably the confluence of the Pressure equalization line 7 approximately opposite - connected is.
  • the screw conveyor element 8c of the metering screw 8 can in any suitable manner within the pressure vessel 2 be stored and supported or freely inside protrude (cantilevered), it also being more suitable Shape (paddling, wings or the like) is designed to the bulk material in the pressure vessel 2 in the required Mechanically loosen up and out of the To discharge or discharge pressure vessel 2.
  • the system is therefore possible to use several Injection points 1a, 1b, 1c of the metallurgical melting reactor 1 simultaneously or alternatively bulk goods the pressure vessel 2 via the multi-branched compressed gas delivery pipeline 9 - preferably in the same size, controllable partial quantities - to be blown in.
  • the filling the pressure vessel can be continuous or discontinuous from the pressure lock 6 - via the feed pipe 5 and the shut-off valve 4 arranged therein. Since this pressure lock 6 also in the manner of a Pressure vessel can be executed, it will also be appropriate to the upper end of this pressure lock 6 shows a branch line 16 indicated by dash-dotted lines Introduce compressed gas line 14a.
  • a suitable one Way connected to the Guteinspeisstelle 12, dash-dotted lines indicated compressed gas sub-line 7a is for Pressure equalization between pressure lock 6 and pressure vessel 2 to initiate the refill process from this Pressure lock 6 in the pressure vessel 2 advantageous.
  • To the upper end of this pressure lock 6 can then in known manner provided with a shut-off valve Gutzu Glassrohr 17 and possibly a pressure relief line 18 connected.
  • FIG. 2 and 3 are two more below Described embodiments in which it are essentially two versions in Area of the pressure vessel to that previously described with reference to FIG. 1 Embodiment is.
  • the basic components are the same as those shown in Fig.1 are in Figures 2 and 3 with the same reference numerals, but with the addition of a dash or a double line, so that structural details generally not described in more detail Need to become.
  • two or more similarly designed pressure vessels 2 ' a common pressure lock 6 'by one with each a supply pipe 5 'provided with a shut-off valve 4' and simultaneously or alternately with Bulk goods can be filled.
  • Each of these two Pressure vessels 2 ' is also in the same way as in the pressure vessel 2 of the first embodiment (Fig.1) with a mechanically discharging the bulk material and metering dosing screw 8 '.
  • each one pneumatic conveying pipeline 9 '' with not here injection points illustrated in more detail at least one Melting reactor are connected, also after the same principle, as explained in more detail with reference to Fig.1 has been.
  • Over the pressure vessel 2 '' is again a pressure lock 6 '' arranged (similar to the previous examples).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
EP98121213A 1997-12-12 1998-11-06 Procédé et dispositif pour le transport pneumatique de matériau en vrac dans un four de fusion métallique Withdrawn EP0922773A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19755389 1997-12-12
DE1997155389 DE19755389A1 (de) 1997-12-12 1997-12-12 Verfahren und Anlage zum pneumatischen Fördern und Einblasen von Schüttgut in einen metallurgischen Schmelzreaktor

Publications (1)

Publication Number Publication Date
EP0922773A1 true EP0922773A1 (fr) 1999-06-16

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EP98121213A Withdrawn EP0922773A1 (fr) 1997-12-12 1998-11-06 Procédé et dispositif pour le transport pneumatique de matériau en vrac dans un four de fusion métallique

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EP (1) EP0922773A1 (fr)
DE (1) DE19755389A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10323902B4 (de) * 2003-05-26 2005-05-25 Loesche Gmbh Brennstoffgemisch zur Zuführung in Blasformen bei der Roheisenerzeugung im Hochofen und Verfahren zur Herstellung und Zuführung des Brennstoffgemisches
DE102014112629A1 (de) * 2014-09-02 2016-03-03 Oleg Gyzha Verfahren zur Erzeugung von Roheisen im Hochofen sowie Hochofen zur Erzeugung von Roheisen durch Aufschmelzen und durch Reduktion von aufzuschmelzendem und zu reduzierendem Material

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE392155C (de) * 1922-03-29 1924-03-20 Eduard Raven Vorrichtung zum Einblasen feinkoerniger oder staubfoermiger Stoffe in die Schmelzzone metallurgischer OEfen
FR579804A (fr) * 1924-03-18 1924-10-24 Arbed Procédé permettant d'introduire dans la zone de fusion des hauts fourneaux ou autres fours à cuve, des matières pulvérulentes de minerai et de combustibles
DE424228C (de) * 1925-07-30 1926-01-20 Arbed Verfahren und Vorrichtung zur Einfuehrung von feinkoernigen Brennstoffen und sonstigem Beschickungsgut in die Schmelzzone von Hochoefen
US3240587A (en) * 1962-12-21 1966-03-15 Allied Chem Method for injecting particulate coal into a blast furnace
EP0027909A1 (fr) * 1979-10-26 1981-05-06 Krupp Polysius Ag Installation pour le transport de matériaux à grain fin
DE3247660A1 (de) * 1982-12-23 1984-10-31 Wilfried 5800 Hagen Stein Vorrichtung fuer eine dosierte foerderung von staubfoermigen guetern
FR2567997A1 (fr) * 1984-07-23 1986-01-24 Japan Foundry Service Co Ltd Dispositif et procede de fusion comportant un apport de charbon pulverise, en particulier dans un four a cuve
US4668130A (en) * 1982-04-05 1987-05-26 Exxon Research And Engineering Company Dense phase coal feeding system
EP0622465A1 (fr) * 1993-04-26 1994-11-02 Stahlwerke Bremen GmbH Procédé pour la production de métal à partir de minerais métalliques

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE392155C (de) * 1922-03-29 1924-03-20 Eduard Raven Vorrichtung zum Einblasen feinkoerniger oder staubfoermiger Stoffe in die Schmelzzone metallurgischer OEfen
FR579804A (fr) * 1924-03-18 1924-10-24 Arbed Procédé permettant d'introduire dans la zone de fusion des hauts fourneaux ou autres fours à cuve, des matières pulvérulentes de minerai et de combustibles
DE424228C (de) * 1925-07-30 1926-01-20 Arbed Verfahren und Vorrichtung zur Einfuehrung von feinkoernigen Brennstoffen und sonstigem Beschickungsgut in die Schmelzzone von Hochoefen
US3240587A (en) * 1962-12-21 1966-03-15 Allied Chem Method for injecting particulate coal into a blast furnace
EP0027909A1 (fr) * 1979-10-26 1981-05-06 Krupp Polysius Ag Installation pour le transport de matériaux à grain fin
US4668130A (en) * 1982-04-05 1987-05-26 Exxon Research And Engineering Company Dense phase coal feeding system
DE3247660A1 (de) * 1982-12-23 1984-10-31 Wilfried 5800 Hagen Stein Vorrichtung fuer eine dosierte foerderung von staubfoermigen guetern
FR2567997A1 (fr) * 1984-07-23 1986-01-24 Japan Foundry Service Co Ltd Dispositif et procede de fusion comportant un apport de charbon pulverise, en particulier dans un four a cuve
EP0622465A1 (fr) * 1993-04-26 1994-11-02 Stahlwerke Bremen GmbH Procédé pour la production de métal à partir de minerais métalliques

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Publication number Publication date
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