EP0004637A1 - Process for the conversion of fine grained iron or manganese ore in a sinterable raw material - Google Patents
Process for the conversion of fine grained iron or manganese ore in a sinterable raw material Download PDFInfo
- Publication number
- EP0004637A1 EP0004637A1 EP79100931A EP79100931A EP0004637A1 EP 0004637 A1 EP0004637 A1 EP 0004637A1 EP 79100931 A EP79100931 A EP 79100931A EP 79100931 A EP79100931 A EP 79100931A EP 0004637 A1 EP0004637 A1 EP 0004637A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ore
- raw material
- manganese ore
- iron
- conversion
- 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.)
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Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 8
- 239000011572 manganese Substances 0.000 title claims abstract description 8
- 239000002994 raw material Substances 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims description 15
- 238000006243 chemical reaction Methods 0.000 title description 3
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract 3
- 238000005245 sintering Methods 0.000 claims description 9
- 239000008188 pellet Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000007201 Saccharum officinarum Nutrition 0.000 claims description 3
- 240000000111 Saccharum officinarum Species 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 235000013379 molasses Nutrition 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 238000005054 agglomeration Methods 0.000 claims description 2
- 230000002776 aggregation Effects 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- -1 sodium fluorosilicate Chemical compound 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 abstract description 14
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 6
- 230000008018 melting Effects 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000006028 limestone 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
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2413—Binding; Briquetting ; Granulating enduration of pellets
-
- 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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
Definitions
- the invention relates generally to a method for treating ore with the aim of extracting raw material for steel production.
- the invention is concerned with a sintering process.
- Sintered material is currently the raw material for charging steel melting furnaces in the world. Sintered material is obtained when certain amounts of iron ore and / or manganese are mixed in certain proportions with coke or coal and other additives, then the high amounts due to the combustion of the coke or coal Exposed to temperatures and finally agglomerated by the beginning melting of the particles of the ore-forming solid parts. This achieves a noticeable porosity and mechanical strength, which are ideal for the feed material for steel melting furnaces.
- the size range of the ore to be used in the sintering process is limited in its lower range to close to 20% below 150 microns, since otherwise there is a risk that the sintering process can no longer be carried out economically because the fines pass through for the combustion of the Coke or the coal required gases (no longer).
- Pelletization consists in the formation of ore spheres with a diameter of 6 to 18 mm with the help of disks, cones or pelletizing drums and a subsequent hardening in special ovens at temperatures of an average of 1300 to 1400 ° C.
- pellets of conventional size (6 to 18 mm) are obtained with the aid of disc, cone or drum pelletizing devices, a cement-like binder being added to the ore and hardening using the cement-like binder lower temperatures. These pellets are also to be fed directly to blast furnaces.
- the process according to the invention now enables the conversion or transfer of iron or manganese fine ore to or into a raw material suitable for sintering by agglomeration of the fine ore into small particles with the aid of special agglomerating agents.
- the method according to the invention is practical feasible table and requires lower costs by allowing a sinterable raw material to be obtained from fine ore, which can otherwise only be used in conventional pelletizing processes.
- the progressiveness of the process according to the invention is based in particular on the fact that - starting from an iron or manganese ore of a size below 150 microns - an ore of a suitable size range can be obtained which can be used for the economical extraction of sintered goods and which at the same time resists its handling and transport without disintegration.
- the iron ore or manganese which is almost entirely in a particle size range below 150 microns and has a moisture content below 15%, in conventional mixing plants with changing amounts of agglomerating agents, e.g. Limestone, cement, bentonite, calcium chloride, sodium silicate, sodium fluorosilicate or sugar cane molasses, mixed.
- agglomerating agents e.g. Limestone, cement, bentonite, calcium chloride, sodium silicate, sodium fluorosilicate or sugar cane molasses
- the ore mixed with the agglomerating agent is then fed to a disc, drum or cone pelletizing device by means of a conveyor belt or chutes.
- the pellets formed during the pelletizing process are discharged again from this pelletizing device before they reach a maximum diameter of 6 mm.
- the micropellets formed in this way are then transferred to silos or to dumpers.
- the agglomerating agents are then cured there for several days at temperatures below 300 ° C. and controlled humidity
- the hardening can be accelerated by providing a C0 2 atmosphere around the micropellets.
- the hardened micropellets can be handled in conventional ore extraction and transport systems, as are customary for ore of an equivalent size range. Together with the ore or separately, the micropellets, if they are sinterable, deliver a sintered material that can be fed to steel melting furnaces.
- Iron ore of which 90% have a particle size of less than 150 microns and the moisture of which is approximately 8%, is fed from a storage silo 2 to a conveyor belt 4 provided with a balance 3 by means of a vibration conveyor.
- the scale 3 also controls a feed device 5 from a smaller silo 6 filled with slaked lime in such a way that about 5% by weight of lime is fed to the ore.
- the ore and the lime now run (together) through a conventional belt mixer 7 and are then transported to a pelletizing disc 8.
- Sugar cane molasses 11 is added to the pelletizing disk 8 by means of a pump 9 and a valve 10 via a spray system (not shown) in an amount of approximately 3% by weight of the ore.
- the pelletizing disc 8 is designed such that the small balls or pellets formed during the pelletizing process are discharged before reaching a maximum size of 6 mm on a conveyor belt 12, which conveys them to stockpile 13 in a closed and C0 2 -rich environment.
- the pellets harden on a heap within 10 days. They can then be handled in conventional plants and fed to a sintering plant for their conversion into sintered goods.
Abstract
Beschrieben wird die Herstellung eines letztlich in Stahlschmelzöfen verwendbaren, sinterbaren Rohmaterials geeigneten Größenbereichs aus sonst kaum ausnutzbarem Eisen- oder Manganfeinerz einer Teilchengröße unter 150 Mikron durch Zusatz von Agglomeriermitteln, Pelletisieren der erhaltenen Mischung bis zu einer maximalen Größe von 6 mm und schließlich Aushärten des Gemischs aus Erz und Agglomeriermittel bei Temperaturen unterhalb von 300°C.The description describes the production of a size range which can ultimately be used in steel melting furnaces and is suitable for sinterable raw materials from otherwise hardly usable iron or manganese fine ore having a particle size below 150 microns by adding agglomerating agents, pelletizing the mixture obtained to a maximum size of 6 mm and finally curing the mixture Ore and agglomerating agent at temperatures below 300 ° C.
Description
Die Erfindung betrifft allgemein ein Verfahren zur Behandlung von Erz mit dem Ziel einer Gewinnung von Rohmaterial zur Stahlherstellung. Insbesondere ist die Erfindung mit einem Sinterungsverfahren befaßt.The invention relates generally to a method for treating ore with the aim of extracting raw material for steel production. In particular, the invention is concerned with a sintering process.
Derzeit stellt Sintergut in der Welt das Rohmaterials zur Beschickung von Stahlschmelzöfen dar. Sintergut erhält man, wenn bestimmte Mengen Eisenerz und/oder Mangan in bestimmten Mengenverhältnissen mit Koks oder Kohle und sonstigen Zusätzen gemischt, dann der auf die Verbrennung des Kokses oder der Kohle zurückzuführenden hohen Temperaturen ausgesetzt und schließlich durch beginnendes Verschmelzen der Teilchen der erzbildenden festen Anteile agglomeriert werden. Hierbei erreicht man eine merkliche Porosität und mechanische Festigkeit, die für das Beschickungsgut für Stahlschmelzöfen ideal sind.Sintered material is currently the raw material for charging steel melting furnaces in the world. Sintered material is obtained when certain amounts of iron ore and / or manganese are mixed in certain proportions with coke or coal and other additives, then the high amounts due to the combustion of the coke or coal Exposed to temperatures and finally agglomerated by the beginning melting of the particles of the ore-forming solid parts. This achieves a noticeable porosity and mechanical strength, which are ideal for the feed material for steel melting furnaces.
Der Größenbereich des bei dem Sinterungsverfahrens zu verwendenden Erzes ist jedoch in seinem unteren Bereich auf nahe 20% unter 150 Mikron beschränkt, da anderenfalls die Gefahr besteht, daß sich das Sinterungsverfahren nicht mehr wirtschaftlich durchführen läßt, weil das Feingut den Durchtritt der für die Verbrennung des Kokses oder der Kohle erforderlichen Gase nicht (mehr) zuläßt.However, the size range of the ore to be used in the sintering process is limited in its lower range to close to 20% below 150 microns, since otherwise there is a risk that the sintering process can no longer be carried out economically because the fines pass through for the combustion of the Coke or the coal required gases (no longer).
So wird also eine große Zahl von Eisenerz- und/oder Mangangewinnungsunternehmen mit beträchtlichen Halden von Feinerz unter 150 Mikron, das nicht zu Sinterungszwecken verwendet werden kann, konfrontiert.Thus, a large number of iron ore and / or manganese mining companies are confronted with substantial stocks of fine ore below 150 microns that cannot be used for sintering purposes.
Ein Teil dieses Feinerzes wird pelletisiert und in Pelletform direkt ohne Sinterung in Stahlschmelzöfen zum Einsatz gebracht. Die Pelletisierung besteht in der Bildung von Erzkügelchen eines Durchmessers von 6 bis 18 mm mit Hilfe von Scheiben, Kegeln oder Pelletisiertrommeln und einer anschließenden Härtung in Spezialöfen bei Temperaturen von durchschnittlich 1300 bis 1400°C.Part of this fine ore is pelletized and used in pellet form directly in steel melting furnaces without sintering. Pelletization consists in the formation of ore spheres with a diameter of 6 to 18 mm with the help of disks, cones or pelletizing drums and a subsequent hardening in special ovens at temperatures of an average of 1300 to 1400 ° C.
Diese Maßnahmen sind jedoch kostspielig und erfordern einen höheren Heizmaterial- und Energieverbrauch.However, these measures are costly and require higher heating material and energy consumption.
Bei anderen bekannten, in der Praxis weniger gut durchführbaren Pelletisierverfahren erhält man Pellets üblicher Größe (6 bis 18 mm) mit Hilfe von Scheiben-, Kegel- oder Trommelpelletisiervorrichtungen, wobei dem Erz ein zementartiges Bindemittel zugesetzt wird und die Härtung mit Hilfe des zementartigen Bindemittels bei niedrigeren Temperaturen erfolgt. Auch diese Pellets sollen Hochöfen direkt zugespeist werden.In other known pelletizing processes which are less practical in practice, pellets of conventional size (6 to 18 mm) are obtained with the aid of disc, cone or drum pelletizing devices, a cement-like binder being added to the ore and hardening using the cement-like binder lower temperatures. These pellets are also to be fed directly to blast furnaces.
Es besteht jedoch ein erheblicher Bedarf nach einem Verfahren, das die Ausnutzung von Feinerz eines Größenbereiches unter 150 Mikron bei geringeren Kosten, als sie übliche Pelletisierverfahren erfordern, gestattet.However, there is a significant need for a process that allows the exploitation of fine ore of less than 150 microns in size at a lower cost than that required by conventional pelletizing processes.
Das erfindungsgemäße Verfahren ermöglicht nun die Umwandlung bzw. Überführung von Eisen- oder Manganfeinerz zu einem bzw. in ein zur Sinterung geeignete(s)n Rohmaterial durch Agglomeration des Feinerzes zu kleinen Teilchen mit Hilfe spezieller Agglomeriermittel. Das erfindungsgemäße Verfahren ist praktisch durchführbar und erfordert geringere Kosten, indem es die Gewinnung eines sinterbaren Rohmaterials aus Feinerz, das sonst nur bei üblichen Pelletisierverfahren zum Einsatz gelangen kann, gestattet.The process according to the invention now enables the conversion or transfer of iron or manganese fine ore to or into a raw material suitable for sintering by agglomeration of the fine ore into small particles with the aid of special agglomerating agents. The method according to the invention is practical feasible table and requires lower costs by allowing a sinterable raw material to be obtained from fine ore, which can otherwise only be used in conventional pelletizing processes.
Die Fortschrittlichkeit des erfindungsgemäßen Verfahrens beruht insbesondere darauf, daß man - ausgehend von einem Eisen-oder Manganerz einer Größe unter 150 Mikron - ein zur wirtschaftlichen Gewinnung von Sintergut verwendbares Erz eines geeigneten Größenbereichs erhält, das gleichzeitig ohne Zerfall seiner Handhabung und dem Transport widersteht.The progressiveness of the process according to the invention is based in particular on the fact that - starting from an iron or manganese ore of a size below 150 microns - an ore of a suitable size range can be obtained which can be used for the economical extraction of sintered goods and which at the same time resists its handling and transport without disintegration.
Erfindungsgemäß wird das Eisenerz oder Mangan, das nahezu in seiner Gesamtheit in einem Teilchengrößenbereich unter 150 Mikron liegt und eine Feuchtigkeit unter 15% aufweist, in üblichen Mischanlagen mit unter Berücksichtigung der jeweiligen Erzeigenschaften wechselnden Mengen an Agglomeriermitteln, z.B. Kalkstein, Zement, Bentonit, Calciumchlorid, Natriumsilicat, Natriumfluorsilicat oder Zuckerrohrmelasse, gemischt. Das mit dem Agglomeriermittel vermischte Erz wird dann mittels eines Förderbandes oder von Rutschen einer Scheiben-, Trommel- oder Kegelpelletisiervorrichtung zugeführt. Aus dieser Pelletisiervorrichtung werden die während des Pelletisiervorgangs gebildeten Kügelchen wieder ausgetragen, bevor sie einen maximalen Durchmesser von 6 mm erreichen. Die auf diese Weise gebildeten Mikropellets werden dann in Silos oder auf Kippen überführt. Dort erfolgt dann mehrere Tage lang die Härtung der Agglomeriermittel bei Temperaturen unterhalb von 300°C und gesteuerter Feuchtigkeit, bis eine ausreichende Transportbeständigkeit erreicht ist.According to the invention, the iron ore or manganese, which is almost entirely in a particle size range below 150 microns and has a moisture content below 15%, in conventional mixing plants with changing amounts of agglomerating agents, e.g. Limestone, cement, bentonite, calcium chloride, sodium silicate, sodium fluorosilicate or sugar cane molasses, mixed. The ore mixed with the agglomerating agent is then fed to a disc, drum or cone pelletizing device by means of a conveyor belt or chutes. The pellets formed during the pelletizing process are discharged again from this pelletizing device before they reach a maximum diameter of 6 mm. The micropellets formed in this way are then transferred to silos or to dumpers. The agglomerating agents are then cured there for several days at temperatures below 300 ° C. and controlled humidity until sufficient transport resistance is achieved.
Die Härtung läßt sich dadurch beschleunigen, daß man um die Mikropellets eine C02-Atmosphäre vorsieht.The hardening can be accelerated by providing a C0 2 atmosphere around the micropellets.
Nach beendeter Härtung lassen sich die gehärteten Mikropellets in üblichen Erzgewinnungs- und Transportanlagen, wie sie für Erz eines äquivalenten Größenbereichs üblich sind, handhaben. Zusammen mit dem Erz oder getrennt liefern die Mikropellets, sofern sie sinterbar sind, ein Sintergut, das Stahlschmelzöfen zugeführt werden kann.After hardening has been completed, the hardened micropellets can be handled in conventional ore extraction and transport systems, as are customary for ore of an equivalent size range. Together with the ore or separately, the micropellets, if they are sinterable, deliver a sintered material that can be fed to steel melting furnaces.
Das folgende Beispiel soll die Erfindung näher veranschaulichen.The following example is intended to illustrate the invention in more detail.
Eisenerz, von dem 90% eine Teilchengröße unter 150 Mikron aufweisen und dessen Feuchtigkeit etwa 8% beträgt, wird mittels eines Vibrationsförderers aus einem Vorratssilo 2 einem mit einer Waage 3 versehenen Förderband 4 zugeführt. Die Waage 3 steuert ferner eine Zufuhrvorrichtung 5 von einem mit gelöschtem Kalk gefüllten kleineren Silo 6 derart, daß dem Erz etwa 5 Gew.-% Kalk zugeführt werden. Das Erz und der Kalk laufen nun (gemeinsam) durch einen üblichen Bandmischer 7 und werden dann zu einer Pelletisierscheibe 8 transportiert. Auf der Pelletisierscheibe 8 wird mittels einer Pumpe 9 und eines Ventils 10 über eine nicht-dargestellte Sprühanlage Zuckerrohrmelasse 11 in einer Menge von etwa 3 Gew.-% des Erzes zugesetzt. Die Pelletisierscheibe 8 ist derart ausgelegt, daß die beim Pelletisiervorgang gebildeten kleinen Kügelchen oder Pellets vor Erreichen einer maximalen Größe von 6 mm auf ein Förderband 12, das sie auf Halde 13 in geschlossener und an C02-reicher Umgebung fördert, ausgetragen werden. Auf Halde härten die Mikropellets innerhalb von 10 Tagen aus. Danach können sie in üblichen Anlagen gehandhabt und einer Sinteranlage zu ihrer Umwandlung zu Sintergut zugeführt werden.Iron ore, of which 90% have a particle size of less than 150 microns and the moisture of which is approximately 8%, is fed from a
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BR7802010A BR7802010A (en) | 1978-03-31 | 1978-03-31 | PROCESS TO TRANSFORM FINE IRON ORE OR MANGANES OF GRANULOMETRY LESS THAN 150 MICRA IN RAW MATERIAL FOR SINTERIZATION THROUGH AGGLOMERATION AND CURING AT LOWER TEMPERATURES AT 300GRAD C |
| BR7802010 | 1978-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0004637A1 true EP0004637A1 (en) | 1979-10-17 |
Family
ID=4010407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79100931A Withdrawn EP0004637A1 (en) | 1978-03-31 | 1979-03-28 | Process for the conversion of fine grained iron or manganese ore in a sinterable raw material |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4273575A (en) |
| EP (1) | EP0004637A1 (en) |
| JP (1) | JPS54142115A (en) |
| BR (1) | BR7802010A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981003499A1 (en) * | 1980-06-05 | 1981-12-10 | Ssab Division Gruvor | Agglomerates,a process for producing thereof and use thereof |
| WO1982002061A1 (en) * | 1980-12-08 | 1982-06-24 | Olle Bostroem | The manufacture of a product to be sintered from fine-grain ironoxide material |
| WO1997017307A2 (en) * | 1995-11-06 | 1997-05-15 | Aeci Limited | Method for preparing hardened granules from a particulate material |
| GB2324081A (en) * | 1997-04-07 | 1998-10-14 | Heckett Multiserv Plc | Additives for Electric Arc Furnace |
| CN114574695A (en) * | 2022-01-19 | 2022-06-03 | 中南大学 | Sintering method of ferromanganese ore pellets |
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| BR8205577A (en) * | 1981-09-24 | 1983-08-30 | Sumitomo Metal Ind | PROCESS TO PRODUCE A COLD AGGLOMERED IRON ORE |
| DE3223203C1 (en) * | 1982-06-22 | 1983-12-29 | Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg | Process and plant for the production of binderless hot briquettes |
| JP2003052499A (en) * | 2001-08-09 | 2003-02-25 | Okamura Corp | Frame structure for display shelf |
| JP4837850B2 (en) * | 2001-09-07 | 2011-12-14 | 新日本製鐵株式会社 | Granulation treatment agent for iron making and granulation treatment method using the same |
| BRPI0620976A2 (en) * | 2006-01-11 | 2012-09-18 | Solsys Ltd | process to produce metal ore pellets, and pellet product |
| CN101238240B (en) * | 2006-03-16 | 2010-10-06 | 瓦利·德·利奥多斯公司 | A material for coating iron ore pelletizing disks and drums and a constructive arrangement for pelletizing disks and drums |
| BRPI0804694B1 (en) * | 2008-07-25 | 2018-11-21 | Vale Do Rio Doce Co | Manganese pellet production process from non-calcined manganese ore and manganese pellet obtained by such process |
| JP5827648B2 (en) * | 2013-07-25 | 2015-12-02 | 株式会社神戸製鋼所 | Method for producing agglomerates |
| CN104630455A (en) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | Manganese mineral powder sintering process |
| WO2016172790A1 (en) * | 2015-04-26 | 2016-11-03 | Hatch Ltd. | Process and apparatus for producing high-manganese steels |
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| US3984229A (en) * | 1970-04-20 | 1976-10-05 | Boliden Aktiebolag | Method for producing coarse powder, hardened iron oxide material from finely divided raw material substantially consisting of hematite and/or magnetite |
| US3689249A (en) * | 1971-05-26 | 1972-09-05 | Cities Service Co | Method of pelletizing using copper-containing siliceous waste materials |
| JPS5441011B2 (en) * | 1973-08-27 | 1979-12-06 | ||
| JPS51114302A (en) * | 1975-04-02 | 1976-10-08 | Nippon Steel Corp | Method of pre-processing sintered material for louering nox |
| DE2608003A1 (en) * | 1976-02-27 | 1977-09-08 | Otto & Co Gmbh Dr C | DEVICE AND METHOD FOR GENERATING A GAS SUITABLE FOR CURING IRON PELLETS |
| JPS6020273B2 (en) * | 1976-11-09 | 1985-05-21 | 三菱重工業株式会社 | bottled valve |
| US4139587A (en) * | 1977-12-09 | 1979-02-13 | Pennwalt Corporation | Process for forming fluorspar compacts |
-
1978
- 1978-03-31 BR BR7802010A patent/BR7802010A/en unknown
-
1979
- 1979-03-27 US US06/024,400 patent/US4273575A/en not_active Expired - Lifetime
- 1979-03-28 EP EP79100931A patent/EP0004637A1/en not_active Withdrawn
- 1979-03-30 JP JP3825879A patent/JPS54142115A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB853532A (en) * | 1957-12-26 | 1960-11-09 | Andre Subervie | Improvements in and relating to the preparation of ores |
| DE1243880B (en) * | 1958-07-18 | 1967-07-06 | Blocked Iron Corp | Process for the production of a piece ore product |
| DE1134401B (en) * | 1959-02-06 | 1962-08-09 | Shell Int Research | Process for sintering fine ores or gout dust |
| DE1126620B (en) * | 1959-08-22 | 1962-03-29 | Dingler Werke Ag | Process for increasing the performance of sintering facilities |
| DE1919750A1 (en) * | 1969-04-18 | 1970-11-12 | Koppers Gmbh Heinrich | Sintering flue dust on grids |
| DE1958845B1 (en) * | 1969-11-24 | 1971-08-05 | Huettenwerk Oberhausen Ag | Process for the production of green pellets from iron ore |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981003499A1 (en) * | 1980-06-05 | 1981-12-10 | Ssab Division Gruvor | Agglomerates,a process for producing thereof and use thereof |
| WO1982002061A1 (en) * | 1980-12-08 | 1982-06-24 | Olle Bostroem | The manufacture of a product to be sintered from fine-grain ironoxide material |
| WO1997017307A2 (en) * | 1995-11-06 | 1997-05-15 | Aeci Limited | Method for preparing hardened granules from a particulate material |
| WO1997017307A3 (en) * | 1995-11-06 | 1997-08-21 | Aeci Ltd | Method for preparing hardened granules from a particulate material |
| GB2324081A (en) * | 1997-04-07 | 1998-10-14 | Heckett Multiserv Plc | Additives for Electric Arc Furnace |
| CN114574695A (en) * | 2022-01-19 | 2022-06-03 | 中南大学 | Sintering method of ferromanganese ore pellets |
| CN114574695B (en) * | 2022-01-19 | 2023-08-22 | 中南大学 | Sintering method of iron-manganese ore pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54142115A (en) | 1979-11-06 |
| BR7802010A (en) | 1979-11-20 |
| US4273575A (en) | 1981-06-16 |
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