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FR2398113A1 - Iron pellets production - by adding coke and bentonite to metallurgical dust, pelletising and reducing the pellets - Google Patents

Iron pellets production - by adding coke and bentonite to metallurgical dust, pelletising and reducing the pellets

Info

Publication number
FR2398113A1
FR2398113A1 FR7721957A FR7721957A FR2398113A1 FR 2398113 A1 FR2398113 A1 FR 2398113A1 FR 7721957 A FR7721957 A FR 7721957A FR 7721957 A FR7721957 A FR 7721957A FR 2398113 A1 FR2398113 A1 FR 2398113A1
Authority
FR
France
Prior art keywords
iron
mixture
bentonite
granules
pellets
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
FR7721957A
Other languages
French (fr)
Other versions
FR2398113B1 (en
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to FR7721957A priority Critical patent/FR2398113A1/en
Publication of FR2398113A1 publication Critical patent/FR2398113A1/en
Application granted granted Critical
Publication of FR2398113B1 publication Critical patent/FR2398113B1/fr
Granted legal-status Critical Current

Links

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
    • C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
    • 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
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic 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)

Abstract

L'invention concerne un procédé de préparation de granules de fer réduit contenant une forte quantité de fer métallique. Selon l'invention on forme un mélange de poussière contenant du fer et de matière charbonneuse sans matière volatile, le rapport du nombre d'atomes de carbone libres à celui d'atomes d'oxygène liés au fer, au zinc ou au plomb dans le mélange étant ajusté à 0,75-1,25; on ajoute 0,5-7 pour cent de bentonite en poids sur la base du mélange; on granule le mélange tout en ajoutant de l'eau pour que les granules verts résultants contiennent 9,5-15,6 pour cent d'eau; on préchauffe les granules verts à une température telle que le carbone ne brûle pas tandis que l'eau est enlevée; on réduit chimiquement les granules secs dans un four rotatif. La courbe jointe montre l'efficacité de la bentonite pour augmenter la résistance à la compression des granules secs. L'invention s'applique notamment à la récupération des poussières de haut-fourneau ou d'aciéries ou d'installations sidérurgiques.The invention relates to a process for preparing reduced iron granules containing a high amount of metallic iron. According to the invention, a mixture of dust containing iron and carbonaceous material without volatile matter is formed, the ratio of the number of free carbon atoms to that of oxygen atoms bound to iron, zinc or lead in the mixture being adjusted to 0.75-1.25; 0.5-7 percent bentonite by weight is added based on the mixture; the mixture is granulated while adding water so that the resulting green granules contain 9.5-15.6 percent water; preheating the green granules to a temperature such that the carbon does not burn while the water is removed; the dry granules are chemically reduced in a rotary kiln. The attached curve shows the effectiveness of bentonite in increasing the compressive strength of dry granules. The invention applies in particular to the recovery of dust from blast furnaces or from steelworks or from steel plants.

FR7721957A 1977-07-18 1977-07-18 Iron pellets production - by adding coke and bentonite to metallurgical dust, pelletising and reducing the pellets Granted FR2398113A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7721957A FR2398113A1 (en) 1977-07-18 1977-07-18 Iron pellets production - by adding coke and bentonite to metallurgical dust, pelletising and reducing the pellets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7721957A FR2398113A1 (en) 1977-07-18 1977-07-18 Iron pellets production - by adding coke and bentonite to metallurgical dust, pelletising and reducing the pellets

Publications (2)

Publication Number Publication Date
FR2398113A1 true FR2398113A1 (en) 1979-02-16
FR2398113B1 FR2398113B1 (en) 1983-12-09

Family

ID=9193448

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7721957A Granted FR2398113A1 (en) 1977-07-18 1977-07-18 Iron pellets production - by adding coke and bentonite to metallurgical dust, pelletising and reducing the pellets

Country Status (1)

Country Link
FR (1) FR2398113A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2031533A1 (en) * 1969-02-19 1970-11-20 Azami Masutaro
FR2281428A1 (en) * 1974-08-09 1976-03-05 Uss Eng & Consult IRON ORE REDUCTION PROCESS
FR2283956A1 (en) * 1974-09-09 1976-04-02 Showa Denko Kk PROCESS FOR THE PREPARATION OF REDUCED METAL ORE GRANULES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2031533A1 (en) * 1969-02-19 1970-11-20 Azami Masutaro
FR2281428A1 (en) * 1974-08-09 1976-03-05 Uss Eng & Consult IRON ORE REDUCTION PROCESS
FR2283956A1 (en) * 1974-09-09 1976-04-02 Showa Denko Kk PROCESS FOR THE PREPARATION OF REDUCED METAL ORE GRANULES

Also Published As

Publication number Publication date
FR2398113B1 (en) 1983-12-09

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Legal Events

Date Code Title Description
ST Notification of lapse