WO1994018347A1 - A slag defoaming composite - Google Patents
A slag defoaming composite Download PDFInfo
- Publication number
- WO1994018347A1 WO1994018347A1 PCT/AU1994/000049 AU9400049W WO9418347A1 WO 1994018347 A1 WO1994018347 A1 WO 1994018347A1 AU 9400049 W AU9400049 W AU 9400049W WO 9418347 A1 WO9418347 A1 WO 9418347A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- composite
- slag
- range
- defoaming
- slag defoaming
- Prior art date
Links
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.
- a suitable briquette - an example of which is now described.
- the ingredients such as calcium alumino silicate, alumina/aluminium and the carbon silica mixture are firstly weighed separately and added into a mixing mill. They are dry mixed typically for three to five minutes. Sodium silicate, which acts as a binder, is finely sprayed into the mix while the mill is blending and this proceeds for a further six to eight minutes. In the last one minute of mixing, the calcium stearate lubricant is added and mixed in. The long mixing time yields a relatively dry mix characterised by good flowability which is essential in the manufacturing process.
- 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)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94906093A EP0682717A4 (en) | 1993-02-05 | 1994-02-04 | A slag defoaming composite. |
JP6517443A JPH08506144A (en) | 1993-02-05 | 1994-02-04 | Slag defoaming composite material |
AU59961/94A AU677632B2 (en) | 1993-02-05 | 1994-02-04 | A slag defoaming composite |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPL7152 | 1993-02-05 | ||
AUPL715293 | 1993-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994018347A1 true WO1994018347A1 (en) | 1994-08-18 |
Family
ID=3776692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1994/000049 WO1994018347A1 (en) | 1993-02-05 | 1994-02-04 | A slag defoaming composite |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0682717A4 (en) |
JP (1) | JPH08506144A (en) |
NZ (1) | NZ261277A (en) |
OA (1) | OA10453A (en) |
WO (1) | WO1994018347A1 (en) |
Cited By (16)
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 |
US7438740B2 (en) * | 2003-03-07 | 2008-10-21 | Koyo Seiko Co. Ltd. | Briquette for raw material for iron manufacture and briquette for introduction into slag generating apparatus |
WO2011126808A2 (en) | 2010-03-29 | 2011-10-13 | The Trustees Of The University Of Pennsylvania | Pharmacologically induced transgene ablation system |
CN102417940A (en) * | 2011-08-30 | 2012-04-18 | 郑州东升冶金新材料有限公司 | Defoaming and slagging heat insulation agent for blast furnace ironmaking and preparation method thereof |
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 |
WO2013049493A1 (en) | 2011-09-28 | 2013-04-04 | The Trustees Of The University Of Pennsylvania | Inducible adeno -associated virus vector mediated transgene ablation system |
WO2017075335A1 (en) | 2015-10-28 | 2017-05-04 | Voyager Therapeutics, Inc. | Regulatable expression using adeno-associated virus (aav) |
US9719106B2 (en) | 2013-04-29 | 2017-08-01 | The Trustees Of The University Of Pennsylvania | Tissue preferential codon modified expression cassettes, vectors containing same, and uses thereof |
WO2018160573A1 (en) | 2017-02-28 | 2018-09-07 | The Trustees Of The University Of Pennsylvania | Influenza vaccines based on aav vectors |
WO2022119871A2 (en) | 2020-12-01 | 2022-06-09 | The Trustees Of The University Of Pennsylvania | Novel compositions with tissue-specific targeting motifs and compositions containing same |
WO2022226263A1 (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 |
US11535665B2 (en) | 2015-05-13 | 2022-12-27 | The Trustees Of The University Of Pennsylvania | AAV-mediated expression of anti-influenza antibodies and methods of use thereof |
US11578341B2 (en) | 2017-02-28 | 2023-02-14 | The Trustees Of The University Of Pennsylvania | Compositions useful in treatment of spinal muscular atrophy |
WO2023056399A1 (en) | 2021-10-02 | 2023-04-06 | The Trustees Of The University Of Pennsylvania | Novel aav capsids and compositions containing same |
WO2023147304A1 (en) | 2022-01-25 | 2023-08-03 | The Trustees Of The University Of Pennsylvania | Aav capsids for improved heart transduction and detargeting of liver |
US11827906B2 (en) | 2017-02-28 | 2023-11-28 | The Trustees Of The University Of Pennsylvania | Adeno-associated virus (AAV) clade f vector and uses therefor |
-
1994
- 1994-02-04 JP JP6517443A patent/JPH08506144A/en active Pending
- 1994-02-04 WO PCT/AU1994/000049 patent/WO1994018347A1/en not_active Application Discontinuation
- 1994-02-04 NZ NZ26127794A patent/NZ261277A/en not_active IP Right Cessation
- 1994-02-04 EP EP94906093A patent/EP0682717A4/en not_active Withdrawn
-
1995
- 1995-08-07 OA OA60696A patent/OA10453A/en unknown
Non-Patent Citations (9)
Title |
---|
DERWENT ABSTRACT Accession No. 25155W/15, Class M24; & JP,A,50 006 406 (SUMITOMO METAL INDS LTD) 13 March 1975 (13.03.75), Abstract. * |
DERWENT ABSTRACT Accession No. 56858Y/32, Class M24, M25; & JP,A,52 026 488 (AIKOH CO LTD) 14 July 1977 (14.07.77), Abstract. * |
DERWENT ABSTRACT Accession No. 86-164597/26, Class L02, M24; & JP,A,61 096 021 (NIPPON TECHNICS K K) 14 May 1986 (14.05.86), Abstract. * |
PATENT ABSTRACTS OF JAPAN, C143, page 56; & JP,A,57 161 017 (AIKOO K K) 4 October 1982 (04.10.82), Abstract. * |
PATENT ABSTRACTS OF JAPAN, C495, page 167; & JP,A,62 274 013 (KAWASAKI STEEL CORP) 28 November 1987 (28.11.87), Abstract. * |
PATENT ABSTRACTS OF JAPAN, C496, page 1; & JP,A,62 274 014 (KAWASAKI STEEL CORP) 28 November 1987 (28.11.87), Abstract. * |
PATENT ABSTRACTS OF JAPAN, C537, page 43; & JP,A,63 137 116 (RIKEN KOGYO K K) 9 June 1988 (09.06.88), Abstract. * |
PATENT ABSTRACTS OF JAPAN, C80, page 92; & JP,A,56 108 815 (DAIICHI NENRIYOU KOGYO K K) 28 August 1981 (28.08.81), Abstract. * |
See also references of EP0682717A4 * |
Cited By (19)
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 |
US7438740B2 (en) * | 2003-03-07 | 2008-10-21 | Koyo Seiko Co. Ltd. | Briquette for raw material for iron manufacture and briquette for introduction into slag generating apparatus |
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 |
EP3699286A1 (en) | 2011-04-20 | 2020-08-26 | The Trustees of the University of Pennsylvania | Regimens and compositions for aav-mediated passive immunization of airborne pathogens |
CN102417940A (en) * | 2011-08-30 | 2012-04-18 | 郑州东升冶金新材料有限公司 | Defoaming and slagging heat insulation agent for blast furnace ironmaking and preparation method thereof |
WO2013049493A1 (en) | 2011-09-28 | 2013-04-04 | The Trustees Of The University Of Pennsylvania | Inducible adeno -associated virus vector mediated transgene ablation system |
US9719106B2 (en) | 2013-04-29 | 2017-08-01 | The Trustees Of The University Of Pennsylvania | Tissue preferential codon modified expression cassettes, vectors containing same, and uses thereof |
US10647998B2 (en) | 2013-04-29 | 2020-05-12 | The Trustees Of The University Of Pennsylvania | Tissue preferential codon modified expression cassettes, vectors containing same, and uses thereof |
US11535665B2 (en) | 2015-05-13 | 2022-12-27 | The Trustees Of The University Of Pennsylvania | AAV-mediated expression of anti-influenza antibodies and methods of use thereof |
WO2017075335A1 (en) | 2015-10-28 | 2017-05-04 | Voyager Therapeutics, Inc. | Regulatable expression using adeno-associated virus (aav) |
WO2018160573A1 (en) | 2017-02-28 | 2018-09-07 | The Trustees Of The University Of Pennsylvania | Influenza vaccines based on aav vectors |
US10786568B2 (en) | 2017-02-28 | 2020-09-29 | The Trustees Of The University Of Pennsylvania | AAV mediated influenza vaccines |
US11578341B2 (en) | 2017-02-28 | 2023-02-14 | The Trustees Of The University Of Pennsylvania | Compositions useful in treatment of spinal muscular atrophy |
US11827906B2 (en) | 2017-02-28 | 2023-11-28 | The Trustees Of The University Of Pennsylvania | Adeno-associated virus (AAV) clade f vector and uses therefor |
WO2022119871A2 (en) | 2020-12-01 | 2022-06-09 | The Trustees Of The University Of Pennsylvania | Novel compositions with tissue-specific targeting motifs and compositions containing same |
WO2022226263A1 (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 |
WO2023056399A1 (en) | 2021-10-02 | 2023-04-06 | The Trustees Of The University Of Pennsylvania | Novel aav capsids and compositions containing same |
WO2023147304A1 (en) | 2022-01-25 | 2023-08-03 | The Trustees Of The University Of Pennsylvania | Aav capsids for improved heart transduction and detargeting of liver |
Also Published As
Publication number | Publication date |
---|---|
NZ261277A (en) | 1997-04-24 |
EP0682717A4 (en) | 1997-04-23 |
JPH08506144A (en) | 1996-07-02 |
EP0682717A1 (en) | 1995-11-22 |
OA10453A (en) | 2002-03-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0682717A1 (en) | A slag defoaming composite | |
US4105457A (en) | Briquet and method of making same | |
US6676725B2 (en) | Cold bonded iron particulate pellets | |
RU2224007C1 (en) | Elevated-strength coal briquette and a method of fabrication thereof | |
US5240492A (en) | Metallurgical fluxes | |
US6074967A (en) | Production of rock wool | |
CA1215235A (en) | Treatment agents for molten steel | |
KR100847051B1 (en) | Deoxidizer for steel and method of preparation thereof | |
CN100398230C (en) | Covering means for a top slag, method for the production thereof and use of the covering means | |
US3801303A (en) | Porous refractory body impregnated with magnesium | |
AU677632B2 (en) | A slag defoaming composite | |
JP2840592B2 (en) | Briquette containing silicon-containing residue as metallurgical additive and method for producing the same | |
US4728358A (en) | Iron bearing briquet and method of making | |
US3929955A (en) | Process for producing agglomerates from fine-grained lignite or fine grained carbonized lignite or from mixtures of the two | |
US3713852A (en) | Exothermic hot topping composition | |
JP2561615B2 (en) | Method for producing complex slag refiner for refining used in out-of-furnace refining | |
US5002733A (en) | Silicon alloys containing calcium and method of making same | |
US3079266A (en) | Process for the manufacture of refractory materials and resultant product | |
EP0479487A1 (en) | Briquettes | |
AU648386B2 (en) | Improvements in the manufacture of shaped refractory objects | |
KR20010010281A (en) | Lump cokes used to Electric furnace or steel-making furnace | |
US4518432A (en) | Slag briquette | |
US4139587A (en) | Process for forming fluorspar compacts | |
US5947888A (en) | Process for insolubilizing and consolidating spent linings from hall-heroult electrolysis cells | |
JPS608284B2 (en) | Manufacturing method of briquettes for modified carburizers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AT AU BB BG BR BY CA CH CN CZ DE DK ES FI GB HU JP KP KR KZ LK LU LV MG MN MW NL NO NZ PL PT RO RU SD SE SK UA US UZ VN |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 261277 Country of ref document: NZ |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1994906093 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1994906093 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1994906093 Country of ref document: EP |