US1940341A - Treating iron baths - Google Patents

Treating iron baths Download PDF

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Publication number
US1940341A
US1940341A US383069A US38306929A US1940341A US 1940341 A US1940341 A US 1940341A US 383069 A US383069 A US 383069A US 38306929 A US38306929 A US 38306929A US 1940341 A US1940341 A US 1940341A
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US
United States
Prior art keywords
tube
bath
water
iron
heat
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.)
Expired - Lifetime
Application number
US383069A
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English (en)
Inventor
Bansen Hugo
Lobbecke Karl
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.)
Krupp Stahl AG
Fried Krupp AG
Original Assignee
Krupp Stahl 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 Krupp Stahl AG filed Critical Krupp Stahl AG
Application granted granted Critical
Publication of US1940341A publication Critical patent/US1940341A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent

Definitions

  • the ore causes a motion of the bath only dur- 16 ingthe decarburization. Since it is fed intermittently and in irregular size, an utilization of the irregularly developed carbon monoxide by after-combustion is impossible'. Furthermore, the government of the charge becomes uncertain in 20 fining by means of ores.
  • water is injected into the bath itself which measure aifords several advantages. If the water is injected with suflicient speed, the injection tube is protected. Furthermore, a highly valued oxygen bearer is thus introduced into the bath and, finally, a continuous movement of the bath is caused by the constant violent development of hydrogen gas.
  • the charge in applying the proc ss to the Thomas or Bessemer process can be treated as long as desired by heating the bath by the after-combustion of the gases developed and correspondingly regulating the quantity of combustion air. In this manner a notably higher working temperature is obtained than for instance by the after-combustion of the carbon monoxide in a converting process, owing to the dilutionof i the gas by the nitrogen of the fining air being dispensed with.
  • the combustion airgis to be conducted so as to come to eflicacious contact with the gas that escapes from the entire surface of the bath.
  • the water may be fed by the above-mentioned tube in a. full jet or the tube may be a double walled structure through the outer jacket of whichthe water ⁇ is fed, in'order to obtain suitable muzzle velocities.
  • Figure 3 is' a cross section through a modified water tube
  • Figure 4 isa similar section through another modified tube, v
  • Figure 5 is the elevation of a third modified tube
  • Figure 6 shows an appliance adapted to carry out the process by means of a movable tube.
  • a protection of the water tube by reducing or rendering more difficult the heat transition from the bath to the tube, as mentioned above under a can be obtained in various ways attention being paid to the prevailing special conditions, that is to the expansion of the tube and the violent; mechanical stress and blows to which.
  • the slag coating preferably is applied to the tube as a liquid slag immediately before introducing the tube, and is completed from time to time by raising the tube during the' operation so 'that new slag will stick thereto from the slag cover ofthe bath; If this protective coating, which in part consists of the content of the bath' itself, possesses the right thickness, a state of balance is obtained between the heat supplied and the heat led oil', whereby the water supply is Secured.
  • Another method to the tube a suitable insulating mass e. g. by means of a spraying gun, or by other means.
  • the invention resides on the following perception: v
  • the supp y of the iquid agent an ordinary melting Iurnace.
  • the depth oi of hioh permits a dipping stroke ot cm.. is established by means of ta" is wound on these tubes tor a length 'of 1 m., this winding being doubled near the muazie for alength of 15 em. with a supply ot liquid ot aslitersperminutaastrokeoisotoio cin., and a dpping trequency of to per minute'the tubes withstand destruction, as tests ve proved. ;In
  • the vessel containing the metal bath w the tube ,f is dipped' which is proo' -its length to be dipped with the insu- ,suchasasbestosorthelike.
  • Precombustion air isadmitted intothe space the bath in the vessel through p rta p channel q surrounding the top o! the The preheated air is supplied to the q through an inlet pipe h leading from preheater Ic.
  • the eon'bustion gases pass oi! the vessel through a flue i leading through preheater Ic, where their beat is imparted to cold air supplied to the preheater.
  • an emcacious protection oi' the asoresorlime,andsupneoessaryiiningwater.
  • the'contraction coemcient to so be applied has to be so determined that the passage area o! the tube is not narrowed.
  • Process of treating an iron bath to convert it into steel which comprises introducing water inliquid stateinto the bathinsuchamanner as to cause decompositon thereot, and burning the combustible gases of dec'omposition by supplying combustion air immediately' above the surface o! the bath.
  • Process of treating an iron bath to convert it into steel which comprises introducing water 3.
  • Proeess o! treating an' bath to convert it. into steel. which oomprises introducing water inliquidstateintothebathin suchamanner as to cause decomposition-thereot, and burning the combustible gases of deeomposition by supplying combustion air immediately above the surface o! the bath, and preheating the combustion air by the waste heat of the process.
  • Process of treating an iron bath to convert it into steel which comprises coating an ordinary iron tube with a hot liquid slag, introducing one end oi'-said tube into the bathabeiore the slag cools, and feeding water in liquid form through said tube into the iron bath.:
  • Process of treating an iron bath to eonvert it into steel which comprises spraying a hot liquid slag coating onto 'an ordinary iron tube, introducing one end of said tube into the bath before said'coating cools and ieeding water in liquid !om thro said tube into the bath.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
US383069A 1928-08-14 1929-08-02 Treating iron baths Expired - Lifetime US1940341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1940341X 1928-08-14

Publications (1)

Publication Number Publication Date
US1940341A true US1940341A (en) 1933-12-19

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Family Applications (1)

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US383069A Expired - Lifetime US1940341A (en) 1928-08-14 1929-08-02 Treating iron baths

Country Status (2)

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US (1) US1940341A (de)
AT (1) AT127359B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2033975A1 (de) * 1969-07-08 1971-01-21 Compagme des Ateliers et Forges de la Loire, (St Chamond, Firminy, St Etienne, Jacob Holtzer), Paris, Wendel Sidelor, Hayange, Moselle, Sprunck, Emi Ie, Moyeuvre Grande, (Frankreich) Verfahren und Vorrichtung zum Kuhlen einer Konverterwindfrischform oder düse
US4177996A (en) * 1978-05-15 1979-12-11 Chang Tommy J C Automatic golf ball teeing apparatus
US5735934A (en) * 1991-02-14 1998-04-07 Wayne State University Method for delivering a gas-supersaturated fluid to a gas-depleted site and use thereof
US7008535B1 (en) 2000-08-04 2006-03-07 Wayne State University Apparatus for oxygenating wastewater

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973180C (de) * 1948-10-02 1959-12-17 Kloeckner Huettenwerk Haspe Ag Verfahren zur Herstellung eines stickstoffarmen Stahles im Windfrischverfahren
DE1214714B (de) * 1954-04-06 1966-04-21 Waagner Biro Ag Verfahren zur Verbrennung der in sauerstoffblasenden, der Stahlherstellung dienenden Konvertern gebildeten kohlenmonoxydhaltigen Abgase und Daempfe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2033975A1 (de) * 1969-07-08 1971-01-21 Compagme des Ateliers et Forges de la Loire, (St Chamond, Firminy, St Etienne, Jacob Holtzer), Paris, Wendel Sidelor, Hayange, Moselle, Sprunck, Emi Ie, Moyeuvre Grande, (Frankreich) Verfahren und Vorrichtung zum Kuhlen einer Konverterwindfrischform oder düse
US4177996A (en) * 1978-05-15 1979-12-11 Chang Tommy J C Automatic golf ball teeing apparatus
US5735934A (en) * 1991-02-14 1998-04-07 Wayne State University Method for delivering a gas-supersaturated fluid to a gas-depleted site and use thereof
US7008535B1 (en) 2000-08-04 2006-03-07 Wayne State University Apparatus for oxygenating wastewater
US7294278B2 (en) 2000-08-04 2007-11-13 Wayne State University Method for oxygenating wastewater

Also Published As

Publication number Publication date
AT127359B (de) 1932-03-25

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