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DE1026080B - Method for achieving coke savings in the shaft furnace - Google Patents

Method for achieving coke savings in the shaft furnace

Info

Publication number
DE1026080B
DE1026080B DEE5570A DEE0005570A DE1026080B DE 1026080 B DE1026080 B DE 1026080B DE E5570 A DEE5570 A DE E5570A DE E0005570 A DEE0005570 A DE E0005570A DE 1026080 B DE1026080 B DE 1026080B
Authority
DE
Germany
Prior art keywords
coke
shaft furnace
achieving
savings
coke savings
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.)
Pending
Application number
DEE5570A
Other languages
German (de)
Inventor
Dr-Ing Hans Eigen
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.)
Rheinische Kalksteinwerke GmbH
Original Assignee
Rheinische Kalksteinwerke GmbH
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 Rheinische Kalksteinwerke GmbH filed Critical Rheinische Kalksteinwerke GmbH
Priority to DEE5570A priority Critical patent/DE1026080B/en
Publication of DE1026080B publication Critical patent/DE1026080B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B11/00Making pig-iron other than in blast furnaces
    • C21B11/02Making pig-iron other than in blast furnaces in low shaft furnaces or shaft furnaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Description

Verfahren zur Erzielung von Koksersparnissen beim Schachtofen Es ist bereits bekannt, zur Verzögerung der Verbrennung von Koks bei der Erzeugung von Eisen aus Erzen in Schacht- oder Schmelzöfen den Koks mit feuersicheren Stoffen zu imprägnieren. Ferner ist es bekannt, zur Erzielung von Koksersparnis beim Schachtofenbetrieb den Koks mit einem verschlackbaren Überzug zu versehen. Hierfür wird im Schrifttum z. B. Kalkmilch, der auch feingemahlener Quarz beigemengt sein kann, vorgeschlagen, oder es sollen Zement oder Ton, denen auch Schamottemehl beigemengt sein kann, verwendet werden. Wie sich weiter aus dem Schrifttum ergibt, sind jedoch Kalk und Zement für diesen Zweck nicht geeignet, vielmehr wird nur bei Verwendung von hochschmelzendem Portlandzement oder Tonerdeschmelzzement eine wirksame Koksuinkrustung erzeugt.Method for achieving coke savings in the shaft furnace It is already known to delay the combustion of coke in the production of Iron from ores in shaft or smelting furnaces and coke with fire-proof materials to impregnate. It is also known to achieve coke savings when operating the shaft furnace to provide the coke with a slagable coating. This is done in the literature z. B. milk of lime, which can also be admixed with finely ground quartz, is suggested, or cement or clay, to which fireclay flour can also be added, should be used will. As can be seen from the literature, however, lime and cement are for not suitable for this purpose, rather it is only used when using high-melting Portland cement or high-alumina cement creates an effective coke encrustation.

Zur Erzielung von Koksersparnissen ist es nicht notwendig, daß die Umkrustung die Vergasung bis zu ihrer Verschlackung verhindert; es genügt vielmehr, wenn die Vergasung des Kokses erschwert wird. Die Umkrustung darf also rissig werden, sofern sie nur nicht vor dem Abschmelzen bei der gewünschten hohen Temperatur gänzlich abfällt. Aus dieser Erkenntnis wird erfindungsgemäß vorgeschlagen, sich mit einer Umkrustung zu begnügen, die die Vergasung. des Kokses erschwert und als Umkrustungsstoff hochhydraulischen oder hydraulischen Kalk, früher »Zementkalk« genannt, zu verwenden, der besser als Umkrustungsmittel als z. B. Portlandzement oder Tonerdezement geeignet ist, da er, wie Versuche ergeben haben, bei Temperaturen über 1000° C eine größere Haltbarkeit hat.To achieve coke savings, it is not necessary that the Encrustation prevents gasification up to the point of slagging; it is rather enough if the gasification of the coke is made difficult. So the encrustation may crack, unless they are entirely before melting at the desired high temperature falls off. From this knowledge it is proposed according to the invention to deal with a Encrustation to make do with the gassing. of coke made more difficult and used as encrustation material to use highly hydraulic or hydraulic lime, formerly called "cement lime", which is better than encrusting agents than z. B. Portland cement or calcium aluminate cement are suitable is because, as tests have shown, at temperatures above 1000 ° C it is a larger Has durability.

Das Verfahren führt durch die Verminderung des Kohlenoxydgehaltes der Schachtofenabgase beispielsweise beim Schmelzen von Eisen im koksbeheizten Gießereischachtofen (Kupolofen) oder beim Brennen und Sintern von Dolomit oder Magnesit im koksbeheizten Schachtofen zu erheblichen Koksersparnissen bei hoher Leistung je m3 Schachtofenraum.The process leads through the reduction of the carbon oxide content the shaft furnace exhaust gases, for example, when iron is smelted in a coke-heated foundry shaft furnace (Cupola furnace) or when firing and sintering dolomite or magnesite in a coke-heated Shaft furnace for considerable coke savings with high output per m3 shaft furnace space.

Claims (1)

PATENTANSPRUCH: Verfahren zur Erzielung von Koksersparnissen beim Schachtofen unter Verwendung eines verschlackbaren, die Vergasung des Kokses erschwerenden Überzuges auf dem Koks, dadurch gekennzeichnet, daß der Koks vor seiner Verwendung mit einem aus hochhydraulischen und hydraulischen Kalk bestehenden Überzug versehen wird. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 35 893, 394 120; »Die neue Gießerei«, Technisch Wissenschaftliche Beihefte, Heft 4 v. Dez. 1950, S. 183.PATENT CLAIM: Process for achieving coke savings in Shaft furnace using a slagable, which complicates the gasification of the coke Coating on the coke, characterized in that the coke before its use provided with a coating consisting of highly hydraulic and hydraulic lime will. Considered publications: German patent specifications No. 35 893, 394 120; "Die neue Gießerei", Technical Scientific Supplements, Issue 4 v. Dec 1950, p. 183.
DEE5570A 1952-06-03 1952-06-03 Method for achieving coke savings in the shaft furnace Pending DE1026080B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE5570A DE1026080B (en) 1952-06-03 1952-06-03 Method for achieving coke savings in the shaft furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE5570A DE1026080B (en) 1952-06-03 1952-06-03 Method for achieving coke savings in the shaft furnace

Publications (1)

Publication Number Publication Date
DE1026080B true DE1026080B (en) 1958-03-13

Family

ID=7066651

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE5570A Pending DE1026080B (en) 1952-06-03 1952-06-03 Method for achieving coke savings in the shaft furnace

Country Status (1)

Country Link
DE (1) DE1026080B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999036579A1 (en) * 1998-01-15 1999-07-22 Voest-Alpine Industrieanlagenbau Gmbh Method for producing hot metal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE35893C (en) * R. EBERT in Dresden-Pieschen Means of delaying combustion
DE394120C (en) * 1923-06-24 1924-04-14 Friedrich Thomas Dr Ing Process for achieving coke savings in shaft furnace operation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE35893C (en) * R. EBERT in Dresden-Pieschen Means of delaying combustion
DE394120C (en) * 1923-06-24 1924-04-14 Friedrich Thomas Dr Ing Process for achieving coke savings in shaft furnace operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999036579A1 (en) * 1998-01-15 1999-07-22 Voest-Alpine Industrieanlagenbau Gmbh Method for producing hot metal

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