EP0383184B1 - Verfahren zur Reduzierung von Staubemission und freiem Luftzutritt im Abstichbereich eines Hochofens - Google Patents

Verfahren zur Reduzierung von Staubemission und freiem Luftzutritt im Abstichbereich eines Hochofens Download PDF

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Publication number
EP0383184B1
EP0383184B1 EP90102432A EP90102432A EP0383184B1 EP 0383184 B1 EP0383184 B1 EP 0383184B1 EP 90102432 A EP90102432 A EP 90102432A EP 90102432 A EP90102432 A EP 90102432A EP 0383184 B1 EP0383184 B1 EP 0383184B1
Authority
EP
European Patent Office
Prior art keywords
blast furnace
reduction
region
snow
ferromanganese
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.)
Revoked
Application number
EP90102432A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0383184A1 (de
Inventor
Dieter Dr.-Ing. Fünders
Harald Winter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intracon Handelsgesellschaft fur Industriebedarf
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Intracon Handelsgesellschaft fur Industriebedarf Mbh
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6374060&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0383184(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Intracon Handelsgesellschaft fur Industriebedarf Mbh, Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Intracon Handelsgesellschaft fur Industriebedarf Mbh
Priority to AT9090102432T priority Critical patent/ATE105588T1/de
Publication of EP0383184A1 publication Critical patent/EP0383184A1/de
Application granted granted Critical
Publication of EP0383184B1 publication Critical patent/EP0383184B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/14—Discharging devices, e.g. for slag
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material

Definitions

  • the invention relates to a method according to the preamble of the main patent claim for reducing the dust emission and free air access in the tapping channel of a blast furnace and, if necessary, the further conveying and decanting devices for the liquid material tapped from the blast furnace until the bed is reached.
  • Liquid nitrogen is cryogenic. This requires extensive safety measures regarding storage and handling. Furthermore, the cooling effect is too intense if very special precautionary measures are not taken. Unfortunately, however, the use of liquid nitrogen also leads to nitriding of the pig iron. However, this has an undesirable effect on the quality of the steel material and runs counter to efforts in the blast furnace and steel sector to strive for an ever lower content of dissolved nitrogen in the future.
  • the invention has for its object to achieve a reduction in dust emissions in the tapping area of a blast furnace up to the casting bed while reducing the free air access and without increasing the metallurgical nitrogen uptake.
  • the invention consists in a method for reducing the dust emission and free air access in the tapping channel of a blast furnace, the subsequent tipping channel, if necessary.
  • the subsequent torpedo pan or in the area of the pouring bed when emptying the torpedo pan in that CO2 snow and possibly CO2 Gas is applied to the molten pig iron or ferromanganese and / or is introduced into the said channels or vessels before and / or when it comes into contact with the molten pig iron / ferromanganese.
  • a simple advantageous possibility of applying the CO2 snow or a mixture of CO2 snow and CO2 gas consists in the use of one or more cannons, which run in the tapping channel. Tilting channel, torpedo pan and / or glazed bed onto which molten pig iron or slag can be placed.
  • tapping channel (s) including iron and slag channel (s)
  • snow-like and gaseous carbonic acid (CO2)
  • CO2 snow-like and gaseous carbonic acid
  • cannon By feeding snow-like and gaseous carbonic acid (CO2), for example using a special cannon, both directly on the tapping side and in several places along the channel, the CO2 snow floats on the slag or pig iron until it enters the tipping channel. Evaporating carbonic acid continuously releases new gaseous carbonic acid, which lowers the partial pressure of harmful atmospheric oxygen and atmospheric nitrogen.
  • snow-shaped carbonic acid makes it easy to control the air exclusion and to adapt it to the current situation.
  • the pouring jet at the transition of the pig iron from the tapping channel to the tipping channel and also during the transition from the tipping channel to the torpedo pan increases the specific surface area of the pig iron many times over. So far, there has been an inevitable intensification of the oxidation and dust development as well as increased nitriding.
  • the gaseous CO2 displaces the harmful atmospheric oxygen and nitrogen if snow-like carbonic acid is simultaneously given to both the liquid pig iron within the tipping channel and to the pouring stream from the pig iron channel to the tipping channel.
  • a combined use of gaseous and snow-like carbonic acid can also bring about a significant improvement in this area, especially if both the glazing chamber and the entire glazing bed are protected against the free entry of air by releasing CO2 snow or gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Blast Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP90102432A 1989-02-14 1990-02-07 Verfahren zur Reduzierung von Staubemission und freiem Luftzutritt im Abstichbereich eines Hochofens Revoked EP0383184B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9090102432T ATE105588T1 (de) 1989-02-14 1990-02-07 Verfahren zur reduzierung von staubemission und freiem luftzutritt im abstichbereich eines hochofens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3904415 1989-02-14
DE3904415A DE3904415C1 (enrdf_load_stackoverflow) 1989-02-14 1989-02-14

Publications (2)

Publication Number Publication Date
EP0383184A1 EP0383184A1 (de) 1990-08-22
EP0383184B1 true EP0383184B1 (de) 1994-05-11

Family

ID=6374060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102432A Revoked EP0383184B1 (de) 1989-02-14 1990-02-07 Verfahren zur Reduzierung von Staubemission und freiem Luftzutritt im Abstichbereich eines Hochofens

Country Status (8)

Country Link
US (1) US5683652A (enrdf_load_stackoverflow)
EP (1) EP0383184B1 (enrdf_load_stackoverflow)
JP (1) JPH02282409A (enrdf_load_stackoverflow)
AT (1) ATE105588T1 (enrdf_load_stackoverflow)
CA (1) CA2010040A1 (enrdf_load_stackoverflow)
DD (1) DD292025A5 (enrdf_load_stackoverflow)
DE (2) DE3904415C1 (enrdf_load_stackoverflow)
ES (1) ES2052985T3 (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6460742B1 (en) 1989-02-14 2002-10-08 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for reducing fume emissions during molten metal transfer
DE4033482C1 (enrdf_load_stackoverflow) * 1990-10-20 1992-02-20 Kloeckner Stahl Gmbh, 4100 Duisburg, De
AU644694B2 (en) * 1990-10-20 1993-12-16 Klockner Stahl Gmbh Apparatus and method for delivering inert gas into a molten metal transportation vessel
US5196072A (en) * 1990-12-12 1993-03-23 Liquid Air Corporation Method and apparatus for controlling metal oxide fume generation during subdivision of a body containing metal values
DK0544967T3 (da) * 1991-11-28 1995-10-16 Von Roll Ag Fremgangsmåde til at undertrykke støv og røg ved fremstillingen af elektrostål
DE19532040C2 (de) * 1995-08-31 1999-05-27 Schloemann Siemag Ag Vorrichtung zum Flüssigmetall-Transport in der Gießhalle eines Schachtofens und Verfahren zum Betrieb dieser Vorrichtung
JP2001503817A (ja) * 1996-11-08 2001-03-21 レール・リキード・ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード 溶融金属の移動のあいだの煙霧の放出を減少させる方法
DE102011008894A1 (de) 2011-01-19 2012-07-19 Air Liquide Deutschland Gmbh Verfahren und Düse zur Unterdrückung einer Entwicklung von eisenhaltigem Dampf
CN102692327B (zh) * 2011-03-22 2014-06-18 上海宝钢设备检修有限公司 熔融还原炼铁炉关键设备综合试验方法
US9107906B1 (en) 2014-10-28 2015-08-18 Adma Biologics, Inc. Compositions and methods for the treatment of immunodeficiency
US10259865B2 (en) 2017-03-15 2019-04-16 Adma Biologics, Inc. Anti-pneumococcal hyperimmune globulin for the treatment and prevention of pneumococcal infection

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1603119A (en) * 1977-11-21 1981-11-18 Lodge Cottrell Ltd Fume containment
US4357003A (en) * 1980-09-24 1982-11-02 Jones & Laughlin Steel Corporation Blast furnace cast house pollutant suppression
EP0071359A1 (en) * 1981-07-23 1983-02-09 Uss Engineers And Consultants, Inc. Methods and apparatus for molten metal fume supression
ZA85911B (en) * 1984-02-24 1985-09-25 Liquid Air Canada Molten metal casting
US4657587A (en) * 1985-02-21 1987-04-14 Canadian Liquid Air Ltd./Air Liquide Canada Ltee Molten metal casting
FR2579495B1 (fr) * 1985-04-01 1987-09-11 Air Liquide Procede de protection d'un jet de coulee de metal
FR2607039B1 (fr) * 1986-11-26 1989-03-31 Air Liquide Procede de coulee d'acier comportant un inertage du bain d'acier par de l'anhydride carbonique sous forme de neige
FR2607829A1 (fr) * 1986-12-09 1988-06-10 Cootec Deutschland Gmbh Procede de traitement d'acier en poche
US4723997A (en) * 1987-04-20 1988-02-09 L'air Liquide Method and apparatus for shielding a stream of liquid metal

Also Published As

Publication number Publication date
ES2052985T3 (es) 1994-07-16
EP0383184A1 (de) 1990-08-22
JPH02282409A (ja) 1990-11-20
ATE105588T1 (de) 1994-05-15
DE59005658D1 (de) 1994-06-16
DE3904415C1 (enrdf_load_stackoverflow) 1990-04-26
DD292025A5 (de) 1991-07-18
CA2010040A1 (en) 1990-08-14
US5683652A (en) 1997-11-04

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