EP0682717A1 - Schlackenentschäumungsmittel - Google Patents
SchlackenentschäumungsmittelInfo
- Publication number
- EP0682717A1 EP0682717A1 EP94906093A EP94906093A EP0682717A1 EP 0682717 A1 EP0682717 A1 EP 0682717A1 EP 94906093 A EP94906093 A EP 94906093A EP 94906093 A EP94906093 A EP 94906093A EP 0682717 A1 EP0682717 A1 EP 0682717A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- composite
- slag
- range
- defoaming
- slag defoaming
- 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- Withdrawn
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 239000002893 slag Substances 0.000 title claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004411 aluminium Substances 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 239000008188 pellet Substances 0.000 claims abstract description 5
- 239000000314 lubricant Substances 0.000 claims description 10
- 239000001913 cellulose Substances 0.000 claims description 8
- 229920002678 cellulose Polymers 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 6
- 235000013539 calcium stearate Nutrition 0.000 claims description 6
- 239000008116 calcium stearate Substances 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- 239000004484 Briquette Substances 0.000 abstract description 14
- 229910052918 calcium silicate Inorganic materials 0.000 abstract 1
- 239000000378 calcium silicate Substances 0.000 abstract 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000000404 calcium aluminium silicate Substances 0.000 description 7
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 7
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 7
- 229940078583 calcium aluminosilicate Drugs 0.000 description 7
- 239000004615 ingredient Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- -1 eg. Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
- C21C2005/366—Foam slags
-
- 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
- C21C2300/00—Process aspects
- C21C2300/04—Avoiding foam formation
Definitions
- This invention relates to a slag defoaming composite for example, for use in steel manufacture, which may preferably be in briquette or pellet form.
- the invention is not restricted to steel manufacture and may be suitable in a number of applications where the defoaming of slag or the reduction of oxides to the metallic state is required.
- iron from a blast furnace is converted to steel by placing the iron in a basic oxygen furnace.
- the quantity of iron can vary. Typically, it is about 200 tonnes.
- Oxygen is blown into the iron by an oxygen lance and the removal of impurities such as carbon, silicon, manganese, etc., converts the iron to steel.
- impurities such as carbon, silicon, manganese, etc.
- the present invention seeks to ameliorate the abovementioned disadvantages and provide an efficient and rapid defoaming agent.
- the present invention provides a slag defoaming composite, comprising: a carbon source; a source of exothermic material, such as aluminium; a dense insert granular material, such as calcium alumina silicate; and a binder, optionally provided; characterised in that, said composite is selected to have a density sufficient to penetrate the slag layer during processing.
- said composite is manufactured in the form of briquettes pellets, and/or the like.
- said slag defoaming composite is substantially non-combustible.
- the density of said composite is selected to be in the range of 1.0 to 2.6 g/cc.
- the slag defoaming composite comprises: a carbon source which yields a final carbon content cf the composite in the range of 3 to 50% w/w; a source of aluminium which yields a final aluminium content of the composite within the range of 5 to 60% w/w; a calcium alumino silicate or a similar dense inert granular material within the range of 10 to 50% w/w; and a binder within the range of 0 to 20% w/w.
- said binder is sodium silicate or similar silicate derivatives, be they organic or inorganic, or clay, lime, or the like.
- the composite further comprises a lubricant material.
- said lubricant material is a stearate, such as calcium stearate.
- said lubricant material is provided within the range of 0 to 2% w/w.
- said composite further comprises a slag fluidiser.
- said slag fluidiser is provided in the range of 0 to 30% w/w.
- the composite further comprises: cellulose based raw material; and flame retardent.
- said cellulose based raw material is provided in the range of 3 to 30% w/w.
- typical ingredients include fine granular premelted calcium alumino silicate, fine powder alumina/aluminium, a silica/carbon fine powder admixture, sodium silicate binder and calcium stearate lubricant.
- the ingredients are mixed together, and then compressed, ideally to a briquette form. Details of the ingredients are as follows, with a suitable composition range for the slag defoaming composite being listed in Example 1, whilst Example 2 provides an example of a typical specific composition.
- the calcium alumino silicate, or like material has a very important role in the manufacturing of the briquette. It is a non-absorbent/inert material which coarsens the mix and thus adjusts the particle size distribution which allows for the briquetting of the mixture.
- the binder material is important to bind the various components together.
- a silicate such as sodium silicate or other similar silicate may be used, or alternatively, materials such as clay or lime, which have a binding effect may be used.
- a specialised binder material may not need to be added. That is, the other components of the composite may have a binding effect on the ingredients of the composite, such that a specialised binder material is unnecessary.
- slag fluidiser cellulose based raw materials and flame retardents may also be included.
- the composite may contain carbon in the range of 3 to 50% w/w. s ag fluidiser in the range of 0 to 30% w/w, and cellulose based raw materials, such as wood chips in the range of 3 to 30%.
- flame retardent is added to prevent auto combustion in the hopper above the BOF.
- a preferred method of forming the briquette is to place the low moisture mixture in a hydraulic press and then to compress it to a pressure in excess of 20 tonnes per square inch to form a hard briquette with compression strength above 1000 kPa.
- a typical size for cylindrically shaped briquettes may be in the range of 65-75 mm in diameter and a 35-50mm in height.
- the typical density for the briquette in Example 2 would be in the vicinity of 2.4 g/cc; however densities in the range of 1.0 to 2.6 are quite acceptable.
- the density can generally be adjusted by varying the quantity of the dense inert granular material, eg., calcium alumino silicate present, the content of cellulose based-material or other variations in composition or processing.
- the briquettes are manufactured with different densities to suit different needs. For example, for steels with very viscous slag, briquettes of high density are required. Also the defoaming composite could be in various briquette shapes and sizes as well as in pellet and other forms. For example, the shape could be cylindrical, half cylindrical, rectangular, certain shapes being more preferable for transportation purposes, etc., as will be understood to persons skilled in the art.
- the slag defoaming composite as described herein has the advantage that the density of a slag defoaming composite - 1 - briquette can be chosen so as to penetrate the surface of the slag, but not sink into the steel. Being suspended within the slag layer results in an efficient exothermic reaction therefore improving the release of gases and reduction of slag viscosity which is desired in order to achieve defoaming. As mentioned this.typical density range is in the vicinity of 1.0 to 2.6 g/cc.
- Variation in the reactivity of the composite is controllable by variation in the composition thereof.
- the very fine division of the ingredients used causes good dispersion of reactive elements and thus promotes a highly exothermic reaction to thin the slag.
- the size, shape and hardness of the briquettes allows them to be handled and placed into hoppers which are held above the basic oxygen furnace without breakage, and to freefall into the furnace without loss of product or thermal reaction, before penetrating the slag.
- a final important advantage of the slag defoaming composite is that it will not combust when stored in a hopper above the basic oxygen furnace and nor will it react exothermically with powdered lime which may enter into the hopper containing the composite.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPL7152/93 | 1993-02-05 | ||
| AUPL715293 | 1993-02-05 | ||
| PCT/AU1994/000049 WO1994018347A1 (en) | 1993-02-05 | 1994-02-04 | A slag defoaming composite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0682717A1 true EP0682717A1 (de) | 1995-11-22 |
| EP0682717A4 EP0682717A4 (de) | 1997-04-23 |
Family
ID=3776692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94906093A Withdrawn EP0682717A4 (de) | 1993-02-05 | 1994-02-04 | Schlackenentschäumungsmittel. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0682717A4 (de) |
| JP (1) | JPH08506144A (de) |
| NZ (1) | NZ261277A (de) |
| OA (1) | OA10453A (de) |
| WO (1) | WO1994018347A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209457B1 (en) | 1998-08-13 | 2001-04-03 | Technology Commercialization Corp. | Method and preformed composition for controlled localized heating of a base material using an exothermic reaction |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1454996B1 (de) * | 2003-03-07 | 2010-01-20 | JTEKT Corporation | Brikett als Rohstoff für die Eisenherstellung und Brikett zur Einführung in eine schlackenbildende Vorrichtung |
| US9315825B2 (en) | 2010-03-29 | 2016-04-19 | The Trustees Of The University Of Pennsylvania | Pharmacologically induced transgene ablation system |
| WO2011126808A2 (en) | 2010-03-29 | 2011-10-13 | The Trustees Of The University Of Pennsylvania | Pharmacologically induced transgene ablation system |
| WO2012145572A1 (en) | 2011-04-20 | 2012-10-26 | The Trustees Of The University Of Pennsylvania | Regimens and compositions for aav-mediated passive immunization of airborne pathogens |
| CN102417940B (zh) * | 2011-08-30 | 2013-03-13 | 郑州东升冶金新材料有限公司 | 一种用于高炉炼铁的消泡化渣保温剂及其制备方法 |
| WO2015012924A2 (en) | 2013-04-29 | 2015-01-29 | The Trustees Of The University Of Pennsylvania | Tissue preferential codon modified expression cassettes, vectors containing same, and use thereof |
| EA201792500A1 (ru) | 2015-05-13 | 2018-04-30 | Дзе Трастиз Оф Дзе Юниверсити Оф Пенсильвания | Aav-опосредованная экспрессия антител против гриппа и способы их использования |
| WO2017075335A1 (en) | 2015-10-28 | 2017-05-04 | Voyager Therapeutics, Inc. | Regulatable expression using adeno-associated virus (aav) |
| UY37620A (es) | 2017-02-28 | 2018-08-31 | Univ Pennsylvania | Vacunas contra la gripe mediadas por aav novedosas |
| PT3589730T (pt) | 2017-02-28 | 2024-02-28 | Univ Pennsylvania | Vetor de vírus adenoassociado (aav) de clado f e suas utilizações |
| JOP20190200A1 (ar) | 2017-02-28 | 2019-08-27 | Univ Pennsylvania | تركيبات نافعة في معالجة ضمور العضل النخاعي |
| TW202237850A (zh) | 2020-12-01 | 2022-10-01 | 賓州大學委員會 | 具有組織特異性靶向基序的新穎構成物及含有其之組成物 |
| CA3216004A1 (en) | 2021-04-23 | 2022-10-27 | The Trustees Of The University Of Pennsylvania | Novel compositions with brain-specific targeting motifs and compositions containing same |
| EP4409010A1 (de) | 2021-10-02 | 2024-08-07 | The Trustees of The University of Pennsylvania | Neue aav-kapside und diese enthaltende zusammensetzungen |
| CN119317718A (zh) | 2022-01-25 | 2025-01-14 | 宾夕法尼亚州大学信托人 | 用于改善心脏转导和肝脏去靶向的aav衣壳 |
| EP4634394A2 (de) | 2022-12-17 | 2025-10-22 | The Trustees of The University of Pennsylvania | Rekombinante aav-mutantenvektoren mit herz- und skelettmuskelspezifischen zielmotiven und zusammensetzungen damit |
| WO2024130070A2 (en) | 2022-12-17 | 2024-06-20 | The Trustees Of The University Of Pennsylvania | Recombinant aav capsids with cardiac- and skeletal muscle- specific targeting motifs and uses thereof |
| TW202516019A (zh) | 2023-06-29 | 2025-04-16 | 賓州大學委員會 | 具中樞神經系統靶向模體的突變aav及含有其之組成物 |
| WO2025102034A1 (en) | 2023-11-10 | 2025-05-15 | The Trustees Of The University Of Pennsylvania | Gene therapy for barth syndrome |
| WO2025106661A1 (en) | 2023-11-14 | 2025-05-22 | The Trustees Of The University Of Pennsylvania | Compositions with cardiac and skeletal musclespecific targeting motifs and uses thereof |
-
1994
- 1994-02-04 EP EP94906093A patent/EP0682717A4/de not_active Withdrawn
- 1994-02-04 WO PCT/AU1994/000049 patent/WO1994018347A1/en not_active Ceased
- 1994-02-04 NZ NZ26127794A patent/NZ261277A/en not_active IP Right Cessation
- 1994-02-04 JP JP6517443A patent/JPH08506144A/ja active Pending
-
1995
- 1995-08-07 OA OA60696A patent/OA10453A/en unknown
Non-Patent Citations (2)
| Title |
|---|
| No further relevant documents disclosed * |
| See also references of WO9418347A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209457B1 (en) | 1998-08-13 | 2001-04-03 | Technology Commercialization Corp. | Method and preformed composition for controlled localized heating of a base material using an exothermic reaction |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08506144A (ja) | 1996-07-02 |
| NZ261277A (en) | 1997-04-24 |
| WO1994018347A1 (en) | 1994-08-18 |
| OA10453A (en) | 2002-03-27 |
| EP0682717A4 (de) | 1997-04-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
Effective date: 19950905 |
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| AK | Designated contracting states |
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| A4 | Supplementary search report drawn up and despatched |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
Effective date: 19970918 |