EP0021465A1 - Procédé de briquettage d'un matériau contenant de l'éponge de fer - Google Patents

Procédé de briquettage d'un matériau contenant de l'éponge de fer Download PDF

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Publication number
EP0021465A1
EP0021465A1 EP80200433A EP80200433A EP0021465A1 EP 0021465 A1 EP0021465 A1 EP 0021465A1 EP 80200433 A EP80200433 A EP 80200433A EP 80200433 A EP80200433 A EP 80200433A EP 0021465 A1 EP0021465 A1 EP 0021465A1
Authority
EP
European Patent Office
Prior art keywords
sulfuric acid
briquetting
sponge iron
iron
dilute sulfuric
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
EP80200433A
Other languages
German (de)
English (en)
Other versions
EP0021465B1 (fr
Inventor
Harry Dr. Dipl.-Ing. Serbent
Horst Steinhöfel
Justus Dipl.-Ing. Kühn
Werner Kaas
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.)
GEA Group AG
Original Assignee
Metallgesellschaft 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 Metallgesellschaft AG filed Critical Metallgesellschaft AG
Priority to AT80200433T priority Critical patent/ATE329T1/de
Publication of EP0021465A1 publication Critical patent/EP0021465A1/fr
Application granted granted Critical
Publication of EP0021465B1 publication Critical patent/EP0021465B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • 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

Definitions

  • the invention relates to a method for briquetting material containing sponge iron produced by direct reduction in the cooled state with the addition of a binder before the briquetting.
  • Materials containing sponge iron are obtained in the direct reduction or rolling of iron oxide-containing materials, in particular iron ore and non-ferrous metals, by means of solid, carbon-containing reducing agents or reducing gases in a rotary kiln, shaft furnace or retort furnace.
  • the material containing sponge iron is further processed on pig iron or steel after it has been separated from other feed components. This happens e.g. B. by use in Electronic shaft furnaces, blast furnaces or arc furnaces.
  • a minimum grain size of the material is required, which, however, does not contain the material containing sponge iron or only partially.
  • the fine-grained material - which is generally understood to mean the grain size below about 6 mm - is also extremely sensitive to weather influences during storage and transport. The entry of water should be avoided, which is not always possible.
  • the handling of material containing sponge iron, which contains large amounts of fine-grained material, is also associated with disruptive dust generation.
  • the long-known briquetting is suitable for this.
  • the improvement in lumpiness achieved is also a prerequisite for the use of these materials in the blast furnace.
  • the briquetting can be done hot or cold. The aim is to work in a "heat", but in many cases this is not possible.
  • the pressing pressure which greatly influences tool wear, can be reduced by using certain binders and trying to achieve the necessary mechanical strength of the pressed articles by subsequent aging.
  • the binder is selected taking into account availability, price, dosage, necessary aging time and behavior of the compacts during the subsequent thermal treatment.
  • binders which are mainly considered for cost reasons, are lime, molasses, sulfite waste, bitumen and starch. However, they always require a minimum outsourcing time of around 24 hours. Some also cause the compacts to disintegrate during the subsequent thermal treatment of the briquettes.
  • the invention is based, materials. containing sponge iron produced by direct reduction to be briquetted, after-treatment of the briquettes before their use in metallurgical furnaces being unnecessary.
  • dilute sulfuric acid is added as a binder and the material contains more than 40% metallic iron.
  • dilute sulfuric acid is to be understood as meaning aqueous solutions which contain free sulfuric acid.
  • the dilute sulfuric acid is advantageously added before a mixing operation.
  • a preferred embodiment is that the dilute sulfuric acid has a free sulfuric acid content of 10 to 30% by weight. This concentration range gives particularly good strength values.
  • a preferred embodiment consists in that the diluted sulfuric acid is added in an amount of 3 to 15% by weight, preferably 5 to 10% by weight, based on dry material. This amount gives good mixing with the material and good strength values. With higher levels of metallic iron, the addition of dilute sulfuric acid can be kept in the lower ranges.
  • waste sulfuric acid is used as the dilute sulfuric acid.
  • a waste product can be used economically.
  • the briquettes had the properties shown in the table.
  • briquettes with such a high compressive strength and abrasion resistance can be produced in a simple manner immediately after leaving the press that they can be transported without further treatment and used in metallurgical furnaces. They also have a low sensitivity to water and good dimensional stability during thermal processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacture Of Iron (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
EP80200433A 1979-05-12 1980-05-08 Procédé de briquettage d'un matériau contenant de l'éponge de fer Expired EP0021465B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80200433T ATE329T1 (de) 1979-05-12 1980-05-08 Verfahren zur brikettierung von schwammeisen enthaltendem material.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792919272 DE2919272A1 (de) 1979-05-12 1979-05-12 Verfahren zur brikettierung von schwammeisen enthaltendem material
DE2919272 1979-05-12

Publications (2)

Publication Number Publication Date
EP0021465A1 true EP0021465A1 (fr) 1981-01-07
EP0021465B1 EP0021465B1 (fr) 1981-10-21

Family

ID=6070619

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200433A Expired EP0021465B1 (fr) 1979-05-12 1980-05-08 Procédé de briquettage d'un matériau contenant de l'éponge de fer

Country Status (7)

Country Link
US (1) US4308055A (fr)
EP (1) EP0021465B1 (fr)
JP (1) JPS55161032A (fr)
AT (1) ATE329T1 (fr)
AU (1) AU526919B2 (fr)
CA (1) CA1141164A (fr)
DE (2) DE2919272A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007143779A1 (fr) * 2006-06-12 2007-12-21 Murrin Murrin Operations Pty Ltd Procédé d'agglomération
JP5303727B2 (ja) * 2008-12-09 2013-10-02 新日鐵住金株式会社 製鋼用還元鉄塊成鉱の製造方法
RU2463362C2 (ru) * 2010-11-30 2012-10-10 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" Способ подготовки железной руды к металлургической переработке

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711951A (en) * 1951-08-02 1955-06-28 Illinois Clay Products Co Process for producing a briquette of iron ore
DE1039546B (de) * 1957-10-02 1958-09-25 F J Collin Ag Zur Verwertung V Verfahren zur Verwertung von schwefelsauren Eisensalzloesungen, insbesondere Beizablaugen
DE1071733B (fr) * 1959-12-24
DE1140592B (de) * 1959-04-27 1962-12-06 Maximilianshuette Eisenwerk Verfahren zum Brikettieren von pulverfoermigen Stoffen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US933269A (en) * 1909-09-07 Wilhelm Schumacher Manufacture of agglomerated bodies from blast-furnace dust.
US2793109A (en) * 1954-04-09 1957-05-21 Surface Combustion Corp Induration process for powdered iron oxide containing material
DE1533852B2 (de) * 1967-03-29 1973-10-04 Metallgesellschaft Ag, 6000 Frankfurt Brikettierung von Eisenschwamm

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1071733B (fr) * 1959-12-24
US2711951A (en) * 1951-08-02 1955-06-28 Illinois Clay Products Co Process for producing a briquette of iron ore
DE1039546B (de) * 1957-10-02 1958-09-25 F J Collin Ag Zur Verwertung V Verfahren zur Verwertung von schwefelsauren Eisensalzloesungen, insbesondere Beizablaugen
DE1140592B (de) * 1959-04-27 1962-12-06 Maximilianshuette Eisenwerk Verfahren zum Brikettieren von pulverfoermigen Stoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEUES AUS DER TECHNIK, No. 2, April 1977 Wurzburg (DE) "Brikettierung des Austragsmaterials eines nach dem Walzverfahren arbeitenden Drehrohrofens Seite 1 * Seite 1 * *

Also Published As

Publication number Publication date
JPS55161032A (en) 1980-12-15
US4308055A (en) 1981-12-29
EP0021465B1 (fr) 1981-10-21
CA1141164A (fr) 1983-02-15
DE3060046D1 (en) 1981-12-24
ATE329T1 (de) 1981-11-15
AU5832180A (en) 1980-11-20
AU526919B2 (en) 1983-02-03
DE2919272A1 (de) 1980-11-27

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