EP0100869A1 - Procédé pour réduire la teneur en titane et aluminium du fer en bloc - Google Patents

Procédé pour réduire la teneur en titane et aluminium du fer en bloc Download PDF

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Publication number
EP0100869A1
EP0100869A1 EP83106603A EP83106603A EP0100869A1 EP 0100869 A1 EP0100869 A1 EP 0100869A1 EP 83106603 A EP83106603 A EP 83106603A EP 83106603 A EP83106603 A EP 83106603A EP 0100869 A1 EP0100869 A1 EP 0100869A1
Authority
EP
European Patent Office
Prior art keywords
block iron
block
titanium
iron
additives
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.)
Withdrawn
Application number
EP83106603A
Other languages
German (de)
English (en)
Inventor
Klaus Dr. Frank
Joachim Dr. Kandler
Hans-Dieter Thiel
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Publication of EP0100869A1 publication Critical patent/EP0100869A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/08—Shaft or like vertical or substantially vertical furnaces heated otherwise than by solid fuel mixed with charge
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/08—Manufacture of cast-iron

Definitions

  • a by-product is a metallic phase which generally consists of about 8 to 20% by weight of silicon, about 3 to 9% by weight of titanium, about 0.5 to 7% by weight % Aluminum, small amounts of carbon, phosphorus and sulfur and the rest iron. Since this metallic phase forms as a solid block under the solidified corundum melt, it is referred to by the person skilled in the art as "block iron". Basically, the block iron is therefore a ferrosilicon-titanium alloy.
  • block iron After grinding as a heavy substance for the preparation of heavy turbidity for the swimming separation of minerals.
  • block iron could also be used as a valuable raw material in iron metallurgy due to its silicon content, this form of application has not been feasible due to the relatively high titanium content. Titanium has a disruptive effect here, since it forms titanium carbide with carbon and titanium nitride with nitrogen, both of which precipitate out of molten iron, which deteriorates the properties of the material.
  • the object is achieved in such a way that the block iron is melted in the presence of certain additives.
  • the invention thus relates to a process for reducing the titanium and aluminum content in block irons, which is characterized in that lumpy block irons in the presence of respectively lumpy limestone and coke and optionally broken glass and / or magnetite as additives at a temperature of about 1350 to 1600 0 C melts and separates the metal melt from the slag melt from the melt forming two layers.
  • Another preferred embodiment of the invention consists in that, based on the amount by weight of block iron, starts.
  • the block iron can essentially Finally, the remelting of the block iron according to the invention is preferably carried out in the presence of the additives in a cold wind cupola furnace with a low hearth, the air blown into the cupola furnace via the wind conduit being supposed to have an oxygen concentration of approximately 21 to 25% by volume due to the addition of oxygen.
  • the process of the invention can be carried out continuously and enables the titanium content of the block iron to be reduced to, for example, 0.4% by weight and the aluminum content to 0.03% by weight, i.e. that a product is obtained which is approximately comparable in composition to the furnace ferrosilicon.
  • the cold-wind cupola furnace as used for melting malleable cast iron, proved to be suitable for carrying out the process according to the invention.
  • the stove and the lower half of the shaft are initially charged with coke, the coke is ignited in the nozzle plane and burned by turning the wind, causing the stove and shaft to heat up and bring them to the required operating temperature.
  • predetermined amounts of block iron, coke, limestone and possibly broken glass and magnetite are filled into the furnace shaft from the top.
  • further batches of the charging material are refilled into the shaft from above, so that there are always about three in the shaft There are sets of content.
  • the temperature in the cooker and shaft is determined by the air flow blown into the shaft via the wind pipe and the coke combustion caused thereby.
  • Oxygen can also be introduced into the wind pipe; in this way it is possible to vary the oxygen content of the wind between about 21 and 25 vol%.
  • the ferrosilicon alloy obtained by the process according to the invention can be used, for example, as a foam carrier in the iron and steel industry and as a raw material for the production of atomized ferrosilicon 15 for sink-float processing.
  • Block iron and aggregates had the grain size and composition shown in Table 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP83106603A 1982-07-19 1983-07-06 Procédé pour réduire la teneur en titane et aluminium du fer en bloc Withdrawn EP0100869A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3226992 1982-07-19
DE19823226992 DE3226992A1 (de) 1982-07-19 1982-07-19 Verfahren zur verminderung des titan- und aluminiumgehaltes in blockeisen

Publications (1)

Publication Number Publication Date
EP0100869A1 true EP0100869A1 (fr) 1984-02-22

Family

ID=6168791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106603A Withdrawn EP0100869A1 (fr) 1982-07-19 1983-07-06 Procédé pour réduire la teneur en titane et aluminium du fer en bloc

Country Status (2)

Country Link
EP (1) EP0100869A1 (fr)
DE (1) DE3226992A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1055506C (zh) * 1997-07-07 2000-08-16 梅嵩 低钛硅铁在铸铁生产上的应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797988A (en) * 1956-01-18 1957-07-02 Pittsburgh Metallurg Company I Process of producing metal alloys of low impurity content
DE1058081B (de) * 1955-03-12 1959-05-27 Knapsack Ag Verfahren zur Herstellung von Ferrosiliciumpulver mit glatter Oberflaeche
US3325278A (en) * 1964-05-07 1967-06-13 Union Carbide Corp Alloy purification process
US3511647A (en) * 1967-02-06 1970-05-12 Dow Chemical Co Purification of ferro-silicon alloys

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058081B (de) * 1955-03-12 1959-05-27 Knapsack Ag Verfahren zur Herstellung von Ferrosiliciumpulver mit glatter Oberflaeche
US2797988A (en) * 1956-01-18 1957-07-02 Pittsburgh Metallurg Company I Process of producing metal alloys of low impurity content
US3325278A (en) * 1964-05-07 1967-06-13 Union Carbide Corp Alloy purification process
US3511647A (en) * 1967-02-06 1970-05-12 Dow Chemical Co Purification of ferro-silicon alloys

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VDG: PRAXIS DES SCHMELZENS IM KUPOLOFEN 1969, GIESSEREI-VERLAG, Düsseldorf, Seite 127 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1055506C (zh) * 1997-07-07 2000-08-16 梅嵩 低钛硅铁在铸铁生产上的应用

Also Published As

Publication number Publication date
DE3226992A1 (de) 1984-02-02

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT CH DE GB LI

17P Request for examination filed

Effective date: 19840310

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19851119

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FRANK, KLAUS, DR.

Inventor name: KANDLER, JOACHIM, DR.

Inventor name: THIEL, HANS-DIETER