EP0286844B1 - Procédé et installation de préparation de briquettes chaudes sans liant - Google Patents
Procédé et installation de préparation de briquettes chaudes sans liant Download PDFInfo
- Publication number
- EP0286844B1 EP0286844B1 EP88103979A EP88103979A EP0286844B1 EP 0286844 B1 EP0286844 B1 EP 0286844B1 EP 88103979 A EP88103979 A EP 88103979A EP 88103979 A EP88103979 A EP 88103979A EP 0286844 B1 EP0286844 B1 EP 0286844B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- hot
- process according
- mixture
- residual
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010304 firing Methods 0.000 title 1
- 239000000446 fuel Substances 0.000 claims abstract description 43
- 239000000126 substance Substances 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 239000003077 lignite Substances 0.000 claims description 4
- 239000004484 Briquette Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 239000000428 dust Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000013379 molasses Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
- C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
Definitions
- the invention relates to a method and a plant for the production of binderless hot briquettes intended for smelting from finely divided, non-flammable non-pyrophoric residues which are produced in the production and processing of iron and steel.
- residues are finely divided dusts, sludges, granules and other substances that contain iron oxides or other metal oxides, such as blast furnace filter dust, oxygen converter filter dust, filter dust from the hall dedusting of steelworks, electric furnace filter dust, steelworks filter sludge, etc. reintroducing them into the production process in order to recover the valuable components contained in the residues; in many cases, however, this is associated with great difficulty or not possible at all because of the nature of the residues, in particular because of the fine particle size. In this case, there is often only the possibility to deposit the residues, which creates environmental protection problems.
- US-A-4 123 209 discloses the hot briquetting of a mixture of iron oxide residues and coal, which is heated in a fluidized bed with the addition of additional fuel and air as the fluidizing gas to the melting point which begins with the briquetting temperature.
- the mixture is preheated before entering the fluidized bed with the help of the finished, hot briquettes, for which additional heat exchange, mixing and separating devices are necessary.
- the invention has for its object to avoid the disadvantages described and to propose a method and an associated system with which residues, which essentially do not contain any combustible components, can be processed into binderless hot briquettes.
- a finely divided fuel is mixed with the finely divided residues.
- This cold mixture is then supplied with sensible heat from the outside until the fuel ignites. Because of the relatively low temperature level, this heat supply can be carried out economically.
- the difficult to set high hot briquetting temperatures of 600 to 900 ° C, however, are achieved by the heat generated when the mixed fuel burns; Since the heat of combustion can be transferred directly to the finely divided residue without major losses, this process step can be carried out economically.
- the heating is carried out either in a fluidized bed / fluidized bed or in a rotary tube.
- the fuels advantageously used such as lignite high-temperature coke, lignite coke, hard coal coke and lignite or hard coal pulp, should have a low ignition temperature (250 to 450 ° C.) to the amount of the outside keep sensible heat supplied as low as possible until the fuel ignites.
- the proportion of fuel in the mixture of residue and fuel which is 2 to 10% by mass and preferably 4 to 6% by mass according to Claim 9, should be such that the fuel is heated before the hot briquetting of the heated residues is largely used up. An excess carbon content is only permissible if the type of fuel used does not adversely affect hot briquetting.
- the amount of fuel added also depends on the calorific value of the fuel and is dependent on the properties of the respective residue, e.g. Water content and specific heat capacity, depending.
- the mixture of finely divided residue and fuel is additionally supplied with heat which can be felt from the outside even after the onset of the combustion of the fuel in order to accelerate the briquetting temperature of 600 to 900 ° C.
- the residues to be briquetted are stored in silos 2.
- the finely divided residue is conveyed to a mixer 4 via a discharge device 3.
- Finely divided fuel is added from a silo 1 via a metering device 5 and mixed in the mixer 4 with the finely divided residue.
- the mixture of fuel and finely divided residue is supplied with heat which can be felt from the outside by a hot oxidizing gas stream 7, which also serves as a fluidizing gas stream.
- the hot oxidizing gas stream 7 is turned off in a combustion chamber 8 Fuel gas 9 and air 10 are generated.
- the finely divided residue After reaching the ignition temperature of the fuel, it reacts with the oxidizing gas stream; As a result of the heat of combustion generated, the finely divided residue is heated up during its migration over the fluidized bed and has hot briquetting temperature at the end of the fluidized bed.
- the heated residue 12 is then fed directly to a briquetting press 13 and pressed into hot briquettes.
- the hot briquettes On a downstream cooling belt 14, the hot briquettes are cooled to ambient temperature by ambient air 15 with the aid of a fan 16.
- the exhaust air generated above the fluidized bed is fed to a dedusting device, not shown, via a blower 11.
- a rotary tube 6a is arranged in place of the fluidized bed 6, into which the hot oxidizing gas stream 7 is introduced.
- the filter dust of example 1 comes from the filter system of a stainless steel plant with an electric furnace and AOD converter, the coarse sludge of example 2 was separated in the filter system of an oxygen steel plant with wet dedusting, and the steel plant dust of example 3 comes from the room dust removal of an oxygen steel plant.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Claims (14)
- Procédé pour la fabrication de briquettes chaudes sans liant apte à la fonte en matériaux résiduaires non pyrophores à particules fines ne contenant substantiellement pas de composants combustibles qui sont produits lors de la fabrication et du traitement du fer et de l'acier, dans lequela) du combustible sous forme finement divisée est mélangé aux matériaux résiduaires dans un mélangeur séparé,b) le mélange de matériau résiduaire et de combustible formé dans le mélangeur est amené à un lit fluidifié/lit fluidisé et tant de chaleur sensible est amenée de l'extérieur au mélange par un flux de gaz oxydant chaud qui sert en même temps de flux de gaz de fluidisation jusqu'à ce que le combustible s'allume et que le combustible, après avoir atteint la température d'allumage, soit brûlé à l'aide du flux de gaz oxydant chaud, tant de combustible étant ajouté que la température du matériau résiduaire atteint la plage de 600 à 900°C, etc) les matériaux résiduaires chauffés sont agglomérés à chaud à une température dans la plage indiquée immédiatement après avoir quitté le lit fluidifié/lit fluidisé et les briquettes chaudes obtenues sont ensuite refroidies sur une bande de refroidissement, mais sans utilisation de la chaleur sensible des briquettes chaudes dans des échangeurs de chaleur.
- Procédé selon la revendication 1,
caractérisé en ce que le temps de séjour du mélange de matériau résiduaire et de combustible dans le lit fluidifié/lit fluidisé est de 5 à 30 minutes. - Procédé pour la fabrication de briquettes chaudes sans liant apte à la fonte en matériaux résiduaires non pyrophores à particules fines ne contenant substantiellement pas de composants combustibles qui sont produits lors de la fabrication et du traitement du fer et de l'acier, dans lequela) du combustible sous forme finement divisée est mélangé aux matériaux résiduaires dans un mélangeur séparé,b) le mélange de matériau résiduaire et de combustible formé dans le mélangeur est amené à un tube tournant et tant de chaleur sensible est amenée de l'extérieur au mélange par un flux de gaz oxydant chaud soufflé dans le tube tournant jusqu'à ce que le combustible s'allume et que le combustible, après avoir atteint la température d'allumage, soit brûlé à l'aide du flux de gaz oxydant chaud, tant de combustible étant ajouté que la température du matériau résiduaire atteint la plage de 600°C à 900°C, etc) les matériaux résiduaires chauffés sont agglomérés à chaud à une température dans la plage indiquée immédiatement après avoir quitté le tube tournant et les briquettes chaudes obtenues sont ensuite refroidies sur une bande de refroidissement, mais sans utilisation de la chaleur sensible des briquettes chaudes dans des échangeurs de chaleur.
- Procédé selon la revendication 3,
caractérisé en ce que le temps de séjour du mélange de matériau résiduaire et de combustible dans le tube tournant est de 5 à 30 minutes. - Procédé selon la revendication 1 ou 3,
caractérisé en ce qu'on utilise comme combustibles, qui sont mélangés aux matériaux résiduaires dans un mélangeur séparé, de la lignite et/ou de la houille sous forme de coke ou de menu brut. - Procédé selon la revendication 5,
caractérisé en ce que la grosseur de grains du combustible introduit va jusqu'à 5mm. - Procédé selon la revendication 5,
caractérisé en ce que la grosseur de grains du combustible introduit est de 0,5 à 1,5mm. - Procédé selon la revendication 1 ou 3,
caractérisé en ce que la proportion de combustible dans le mélange de matériau résiduaire et de combustible est de 2 à 10% en masse. - Procédé selon la revendication 8,
caractérisé en ce que la proportion de combustible est de 4 à 6% en masse. - Procédé selon la revendication 1 ou 3,
caractérisé en ce que la grosseur de grains des matériaux résiduaires en particules fines va jusqu'à 5mm. - Procédé selon la revendication 1 ou 3,
caractérisé en ce que la grosseur de grains des matériaux résiduaires en particules fines est inférieure à 1mm. - Procédé selon la revendication 1 ou 3,
caractérisé en ce que de la chaleur sensible est amenée additionnellement de l'extérieur au mélange de matériau résiduaire en particules fines et de combustible dans le lit fluidifié/lit fluidisé ou dans le tube tournant même après le commencement de la combustion du combustible, afin d'atteindre de manière accélérée la température d'agglomération de 600 à 900°C. - Installation pour la mise en oeuvre du procédé selon la revendication 1, qui consiste essentiellement des parties suivantes :
- un mélangeur (4) séparé,- un lit fluidifié/fluidisé (6),- une chambre de combustion (8) séparée pour la formation d'un flux de gaz oxydant chaud avec raccordement au lit fluidifié/fluidisé,- une presse à agglomérer (13) et- une bande de refroidissement, cependant sans échangeur de chaleur pour utiliser la chaleur sensible des briquettes chaudes. - Installation pour la mise en oeuvre du procédé selon la revendication 3 qui consiste essentiellement des parties suivantes :
- un mélangeur (4) sépare,- un tube tournant (6a),- une chambre de combustion (8) séparée pour la formation d'un flux de gaz oxydant chaud avec raccordement au tube tournant,- une presse à agglomérer (13) et- une bande de refroidissement, cependant sans échangeur de chaleur pour utiliser la chaleur sensible des briquettes chaudes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88103979T ATE69270T1 (de) | 1987-04-02 | 1988-03-14 | Verfahren und anlage zur herstellung von bindemittellosen heissbriketts. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3711130A DE3711130C1 (de) | 1987-04-02 | 1987-04-02 | Verfahren und Anlage zur Herstellung von bindemittellosen Heissbriketts |
DE3711130 | 1987-04-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0286844A1 EP0286844A1 (fr) | 1988-10-19 |
EP0286844B1 true EP0286844B1 (fr) | 1991-11-06 |
Family
ID=6324722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88103979A Expired - Lifetime EP0286844B1 (fr) | 1987-04-02 | 1988-03-14 | Procédé et installation de préparation de briquettes chaudes sans liant |
Country Status (7)
Country | Link |
---|---|
US (1) | US4872906A (fr) |
EP (1) | EP0286844B1 (fr) |
JP (1) | JPS63262427A (fr) |
KR (1) | KR880012779A (fr) |
AT (1) | ATE69270T1 (fr) |
DE (2) | DE3711130C1 (fr) |
ES (1) | ES2027717T3 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5104446A (en) * | 1989-09-29 | 1992-04-14 | Iron Tiger Investment Inc. | Agglomeration process |
BE1010700A5 (nl) † | 1996-10-17 | 1998-12-01 | Trading And Recycling Company | Werkwijze voor het verwerken van roestvaste staalslakken. |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1009397B (de) * | 1953-04-23 | 1957-05-29 | F J Collin Ag Zur Verwertung V | Verfahren zur Verhuettung von Feinerzen oder Metalloxyden |
BE646000A (fr) * | 1963-04-10 | |||
GB1096315A (en) * | 1964-03-20 | 1967-12-29 | Coal Industry Patents Ltd | Briquettes composed of inorganic compounds and carbonaceous material |
ES340602A1 (es) * | 1966-05-17 | 1968-06-01 | Boliden Ab | Procedimiento para la aglomeracion de un producto de grano fino. |
US3941582A (en) * | 1969-06-12 | 1976-03-02 | Baum Jesse J | Direct reduced iron |
US3870507A (en) * | 1973-05-14 | 1975-03-11 | Ferro Carb Agglomeration | Control of pollution by recycling solid particulate steel mill wastes |
LU70523A1 (fr) * | 1974-07-12 | 1976-05-31 | ||
US4123209A (en) * | 1977-04-18 | 1978-10-31 | Moore James E | Briquetting plant |
DE2852964A1 (de) * | 1978-12-07 | 1980-06-26 | Krupp Polysius Ag | Verfahren und anlage zur reduktion von erzen |
DE3223203C1 (de) * | 1982-06-22 | 1983-12-29 | Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg | Verfahren und Anlage zur Herstellung bindemittelloser Heissbriketts |
LU85116A1 (de) * | 1983-12-06 | 1985-09-12 | Laborlux Sa | Verfahren zur heissbrikettierung feinkoerniger stoffe und zur weiterverarbeitung der heissbriketts |
DE3529084C1 (de) * | 1985-08-14 | 1986-10-16 | Thyssen Stahl AG, 4100 Duisburg | Verfahren und Anlage zur Herstellung bindemittelloser Heissbriketts |
LU86070A1 (de) * | 1985-09-09 | 1987-04-02 | Laborlux Sa | Verfahren zum aufarbeiten zink-und bleihaltiger reststoffe der stahlindustrie im hinblick auf eine metallurgische weiterverarbeitung |
-
1987
- 1987-04-02 DE DE3711130A patent/DE3711130C1/de not_active Expired
-
1988
- 1988-03-14 ES ES198888103979T patent/ES2027717T3/es not_active Expired - Lifetime
- 1988-03-14 EP EP88103979A patent/EP0286844B1/fr not_active Expired - Lifetime
- 1988-03-14 AT AT88103979T patent/ATE69270T1/de not_active IP Right Cessation
- 1988-03-14 DE DE8888103979T patent/DE3865999D1/de not_active Expired - Fee Related
- 1988-03-16 US US07/168,708 patent/US4872906A/en not_active Expired - Fee Related
- 1988-03-31 JP JP63076633A patent/JPS63262427A/ja active Pending
- 1988-04-02 KR KR1019880003740A patent/KR880012779A/ko not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
ATE69270T1 (de) | 1991-11-15 |
EP0286844A1 (fr) | 1988-10-19 |
DE3711130C1 (de) | 1988-07-21 |
JPS63262427A (ja) | 1988-10-28 |
US4872906A (en) | 1989-10-10 |
DE3865999D1 (de) | 1991-12-12 |
KR880012779A (ko) | 1988-11-29 |
ES2027717T3 (es) | 1992-06-16 |
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