EP0302000A2 - Procédé pour diminuer la désagrégation d'agglomérés - Google Patents

Procédé pour diminuer la désagrégation d'agglomérés Download PDF

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Publication number
EP0302000A2
EP0302000A2 EP88730124A EP88730124A EP0302000A2 EP 0302000 A2 EP0302000 A2 EP 0302000A2 EP 88730124 A EP88730124 A EP 88730124A EP 88730124 A EP88730124 A EP 88730124A EP 0302000 A2 EP0302000 A2 EP 0302000A2
Authority
EP
European Patent Office
Prior art keywords
sinter
grain
blast furnace
sulfur
treatment
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.)
Granted
Application number
EP88730124A
Other languages
German (de)
English (en)
Other versions
EP0302000A3 (en
EP0302000B1 (fr
Inventor
Klaus Dr. Grebe
Hans Dr. De Haas
Kurt Peter Stricker
Rainer Altland
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0302000A2 publication Critical patent/EP0302000A2/fr
Publication of EP0302000A3 publication Critical patent/EP0302000A3/de
Application granted granted Critical
Publication of EP0302000B1 publication Critical patent/EP0302000B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/008—Composition or distribution of the charge

Definitions

  • the medium-based sinters that are largely customary today have a pronounced tendency to disintegrate into fine grains in laboratory tests under a reducing gas atmosphere in the temperature range between 400 and 600 ° C.
  • Such "grain breakdown" of the sinter can affect the gasification in the blast furnace.
  • grain decay in the blast furnace leads to an increased discharge of gout dust.
  • sinter of 16 to 20 mm grain size which has been taken from the already broken and classified sinter, is reduced in a gas atmosphere of CO and N2 at 550 ° C. and the reduced material is then subjected to a drum treatment.
  • the fine fraction ⁇ 3 mm in% by weight subsequently separated by sieving serves as a measure of the tendency to disintegrate in the blast furnace.
  • This RDI test is basically similar to that in ISO document no. ISO-DIS 4696 described test method, but differs in details and especially in the grain class selected for testing.
  • the aim is not to exceed a certain percentage of fines (e.g. with the RDI value approx. 35% ⁇ 3 mm) through sintering measures.
  • the decay value determined in the laboratory therefore does not appear to be a control variable that is fundamentally and directly proportional to the extent of sinter destruction in the blast furnace.
  • the invention has for its object to improve the treatment method mentioned at the outset in such a way that corrosion is reduced and the sinter is treated in a more environmentally friendly manner, that if necessary only a partial amount of the sinter production is treated, a sinter with an increased disintegration value can be used and yet no impairment of the blast furnace passage.
  • the sulfur-containing salts should preferably be selected so that their decomposition temperature is not below 200 ° C. and also not above 600 ° C.
  • FeSO4 a decomposition point of 480 ° C.
  • the decay behavior of the sinter treated according to the invention is more homogeneous than untreated sinter or as sinter treated according to DE-PS 3242086. This has a favorable effect on the blast furnace mode of operation. Since the sulfur compounds that are used for spraying pass almost completely into the slag, no corrosion occurs in the blast furnace location, so that the treatment proposed here is also more cost-effective and environmentally friendly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
EP19880730124 1987-07-30 1988-05-25 Procédé pour diminuer la désagrégation d'agglomérés Expired - Lifetime EP0302000B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3725874 1987-07-30
DE3725874 1987-07-30
DE19873733480 DE3733480C1 (de) 1987-07-30 1987-10-01 Verfahren zur Verringerung des Kornzerfalls
DE3733480 1987-10-01

Publications (3)

Publication Number Publication Date
EP0302000A2 true EP0302000A2 (fr) 1989-02-01
EP0302000A3 EP0302000A3 (en) 1990-03-21
EP0302000B1 EP0302000B1 (fr) 1992-08-19

Family

ID=25858284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880730124 Expired - Lifetime EP0302000B1 (fr) 1987-07-30 1988-05-25 Procédé pour diminuer la désagrégation d'agglomérés

Country Status (4)

Country Link
EP (1) EP0302000B1 (fr)
JP (1) JPS6439329A (fr)
DE (1) DE3733480C1 (fr)
ES (1) ES2034358T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11549159B2 (en) 2017-05-22 2023-01-10 Paul Wurth S.A. Method of operating a sinter plant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1716265B1 (fr) * 2003-12-18 2012-06-13 Showa Denko K.K. Procede permettant de produire un objet profile a base d'un alliage d'aluminium et objet profile a base d'un alliage d'aluminium

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289727C (fr) *
SE35124C1 (fr) * 1913-07-09
FR419526A (fr) * 1909-10-27 1911-01-09 Edmond Alexandre Pretceille Procédé pour l'enrichissement des produits obtenus dans l'agglomération ou la scorification des minerais pulvérulents, poussières de hauts fourneaux ou autres matières analogues finement divisées
FR643274A (fr) * 1927-01-26 1928-09-13 Cie Des Metaux Overpelt Lommel Perfectionnements apportés au grillage et à l'agglomération des minerais fins ou autres matières fines, ou à l'une de ces deux opérations
US2810633A (en) * 1952-02-20 1957-10-22 Cooper Jack Ellis Process of recovering iron values from blast furnace dust
FR2201124A1 (en) * 1972-09-29 1974-04-26 Wienert Fritz Iron sinter pellet prodn - using coarse particled raw material bonded with carbon, and formed into high strength product
DE3242086C2 (de) * 1982-11-13 1984-09-06 Studiengesellschaft für Eisenerzaufbereitung, 3384 Liebenburg Verfahren zur Minimierung des Reduktionszerfalls von Eisenerzen und Eisenerzagglomeraten als Hochofenmöller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11549159B2 (en) 2017-05-22 2023-01-10 Paul Wurth S.A. Method of operating a sinter plant

Also Published As

Publication number Publication date
JPS6439329A (en) 1989-02-09
DE3733480C1 (de) 1989-01-19
EP0302000A3 (en) 1990-03-21
ES2034358T3 (es) 1993-04-01
EP0302000B1 (fr) 1992-08-19

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