US3532329A - Strip heating apparatus - Google Patents

Strip heating apparatus Download PDF

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Publication number
US3532329A
US3532329A US772764A US3532329DA US3532329A US 3532329 A US3532329 A US 3532329A US 772764 A US772764 A US 772764A US 3532329D A US3532329D A US 3532329DA US 3532329 A US3532329 A US 3532329A
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US
United States
Prior art keywords
strip
chamber
furnace
duct
combustion
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
US772764A
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English (en)
Inventor
Quentin M Bloom
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.)
Selas Corp of America
Selas Corp
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Selas Corp of America
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
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Publication of US3532329A publication Critical patent/US3532329A/en
Assigned to FIRST PENNSYLVANIA BANK N A, A NATIONAL BANKING ASSOCIATION reassignment FIRST PENNSYLVANIA BANK N A, A NATIONAL BANKING ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SELAS CORPORATION OF AMERICA A CORP OF PA
Assigned to SELAS CORPORATION OF AMERICA A CORP. OF PA reassignment SELAS CORPORATION OF AMERICA A CORP. OF PA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: FIRST PENNSYLVANIA BANK N.V., FOR ITSELF AND AS AGENT FOR THE PHILADELPHIA NATIONAL BANK
Assigned to BANCBOSTON FINANCIAL COMPANY reassignment BANCBOSTON FINANCIAL COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SELAS CORPORATION OF AMERICA
Anticipated expiration legal-status Critical
Assigned to SELAS CORPORATION OF AMERICA reassignment SELAS CORPORATION OF AMERICA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANCBOSTON FINANACIAL COMPANY A MA TRUST
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire

Definitions

  • Strip metal heating apparatus in which there is provided a strip preheating chamber and a strip heating furnace with provisions for ducting products of combustion from the furnace either directly to an exhaust stack or through the preheating chamber to the exhaust stack in any desired volume.
  • the present invention relates to the heating of strip metal and more particularly to apparatus for the continuous heating of strip steel for annealing, heating for galvanizing, or other purposes.
  • a direct fired strip heating furnace preferably, vertically positioned, through which strip is directed after passing over a plurality of guide rolls.
  • a chamber is located around the strip between a pair of guide rolls and a duct is provided to direct exhaust gases from the furnace to the chamber.
  • An additional duct is provided through which exhaust gases can be discharged directly to the atmosphere, and dampers are provided in the ducts to direct all or part of the exhaust gases through each duct.
  • FIG. 1 is a view partly in section of the apparatus taken on line 11 of FIG. 2;
  • FIG. 2 is a plan view of the apparatus.
  • a strip of metal 1 which is guided through a path by guide rolls 2 and 3. These rolls guide the strip through the preheat chamber 4 and a direct fired furnace 5 which is prefer- Patented Oct. 6, 1970 ably of the type disclosed in US. Pat. N0. 2,869,846.
  • a furnace includes panels 6 and 7 on opposite sides of the strip, each of which has in it a plurality of rows of burners 8 which fire directly into the furnace chamber to heat the strip from opposite sides by radiation and by convention from the products of combustion.
  • the products of combustion pass upwardly toward a relatively narrow entrance or inlet slot 9 where they are withdrawn through passages 11 and 12 respectively to a connecting duct 13 which is connected with an exhaust duct 14.
  • Duct 14 has in it a damper 15 operated by a handle 16 to control the fiow of gases from the furnace.
  • the duct 13 is connected with another duct 17 which leads to entrances 18 and 19 at the bottom and top, respectively, of preheat chamber 4 adjacent to the entrance end thereof.
  • Duct 17 has in it a damper 21 which is operated by a handle 22 to vary the amount of products of combustion that can flow to the preheat chamber.
  • the products of combustion are exhausted from the preheat chamber through a pair of ducts 23 and 24 which are joined by a duct 25 leading to the main exhaust duct 14 downstream of damper 15.
  • damper 15 can be adjusted to vary the back pressure in the furnace. If it is desired to preheat the strip prior to the time that it enters the furnace, damper 15 will be closed and damper 21 will be opened so that the products of combustion will be directed through preheat chamber 4 before being exhausted through ducts 25 and 14.
  • the amount of preheat that is imparted to the strip in chamber 4 will depend upon the adjustment of dampers 21 and 15. These can be regulated, preferably manually so that full preheat or partial preheat of the strip can be obtained prior to the time it enters into furnace 5 for the final heating.
  • the amount of preheat imparted to strip 1 for a given setting of burners 8 will depend upon the type of heating that is being done, whether annealing or heating for galvanizing, for example; the weight of the strip 1 and its speed. Normally, when the preheating chamber is being used, the strip will not be heated in this chamber above a temperature at which it will oxidize while passing from the preheat chamber over roll 3 of the furnace.
  • the hot products of combustion introduced into chamber 4 are introduced adjacent to the entrance end of this chamber.
  • the prod ucts of combustion at their highest temperature will impinge upon opposite surfaces of the strip to vaporize any oil that may be on the surfaces of the strip, thereby cleaning the strip prior to the time it is heated. This vaporization of oil will reduce the fumes that would otherwise be produced if the oil were burned in the furnace proper.
  • a housing can be built around the strip between the exit of the preheat chamber and the entrance of the furnace, if desired. This would save the heat that would normally be lost during the passage of the strip between these two points, which loss however is rather slight.
  • Apparatus for preheating and heating strip material comprising means to direct the strip through a path, means forming a chamber having an entrance and an exit surrounding the strip at a first location along said path, a furnace to heat the strip surrounding the strip at a second location also said path, said furnace being provided with burners producing hot products of combustion, manifold means located adjacent to the point where the strip enters said furnace to Withdraw the products of combustion, an exhaust duct connected to said manifold means, a second duct connected to said manifold means, said second duct discharging into said chamber, a third duct connecting the interior of said chamber to said exhaust duct, and damper means in said ducts operative to direct products of combustion to said exhaust duct or to said second duct.
  • damper means includes a first damper in said exhaust duct and a second damper in said second duct, and means to adjust said dampers individually.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
US772764A 1968-11-01 1968-11-01 Strip heating apparatus Expired - Lifetime US3532329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77276468A 1968-11-01 1968-11-01

Publications (1)

Publication Number Publication Date
US3532329A true US3532329A (en) 1970-10-06

Family

ID=25096151

Family Applications (1)

Application Number Title Priority Date Filing Date
US772764A Expired - Lifetime US3532329A (en) 1968-11-01 1968-11-01 Strip heating apparatus

Country Status (6)

Country Link
US (1) US3532329A (enExample)
BE (1) BE740923A (enExample)
DE (1) DE1954963C3 (enExample)
FR (1) FR2022350B1 (enExample)
GB (1) GB1219399A (enExample)
NL (1) NL149855B (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165964A (en) * 1976-10-27 1979-08-28 Nippon Steel Corporation Vertical direct fired strip heating furnaces
WO1981002309A1 (fr) * 1980-02-13 1981-08-20 Vnii Pi Otschistke Gazov Four pour le chauffage d'articles
US4364728A (en) * 1981-05-19 1982-12-21 The Electric Furnace Company Continuous strip preheat furnace and method of operation
FR2575495A1 (fr) * 1984-12-28 1986-07-04 Chugai Ro Kogyo Kaisha Ltd Four de recuit continu de metaux
US20070181233A1 (en) * 2004-10-29 2007-08-09 Aga Ab Method for the manufacture of extended steel products
US20090123651A1 (en) * 2005-10-14 2009-05-14 Nobuyoshi Okada Continuous Annealing and Hot Dip Plating Method and Continuous Annealing and Hot Dip Plating System of Steel sheet Containing Si

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462202A (en) * 1944-01-29 1949-02-22 Selas Corp Of America Heat treating
US3198501A (en) * 1963-04-10 1965-08-03 Banister Construction 1963 Ltd Apparatus for heating tubular metal goods
US3459410A (en) * 1967-10-25 1969-08-05 Nat Steel Corp Movable-chamber heating apparatus with seal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462202A (en) * 1944-01-29 1949-02-22 Selas Corp Of America Heat treating
US3198501A (en) * 1963-04-10 1965-08-03 Banister Construction 1963 Ltd Apparatus for heating tubular metal goods
US3459410A (en) * 1967-10-25 1969-08-05 Nat Steel Corp Movable-chamber heating apparatus with seal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165964A (en) * 1976-10-27 1979-08-28 Nippon Steel Corporation Vertical direct fired strip heating furnaces
WO1981002309A1 (fr) * 1980-02-13 1981-08-20 Vnii Pi Otschistke Gazov Four pour le chauffage d'articles
US4364728A (en) * 1981-05-19 1982-12-21 The Electric Furnace Company Continuous strip preheat furnace and method of operation
FR2575495A1 (fr) * 1984-12-28 1986-07-04 Chugai Ro Kogyo Kaisha Ltd Four de recuit continu de metaux
US20070181233A1 (en) * 2004-10-29 2007-08-09 Aga Ab Method for the manufacture of extended steel products
US7763117B2 (en) * 2004-10-29 2010-07-27 Aga Ab Method for the manufacture of extended steel products
US20090123651A1 (en) * 2005-10-14 2009-05-14 Nobuyoshi Okada Continuous Annealing and Hot Dip Plating Method and Continuous Annealing and Hot Dip Plating System of Steel sheet Containing Si

Also Published As

Publication number Publication date
DE1954963C3 (de) 1975-06-19
DE1954963B2 (de) 1974-10-31
FR2022350B1 (enExample) 1974-05-10
FR2022350A1 (enExample) 1970-07-31
BE740923A (enExample) 1970-04-28
NL6916189A (enExample) 1970-05-06
DE1954963A1 (de) 1970-05-06
GB1219399A (en) 1971-01-13
NL149855B (nl) 1976-06-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: FIRST PENNSYLVANIA BANK N A 19TH FL.CENTRE SQ WEST

Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA A CORP OF PA;REEL/FRAME:003997/0981

Effective date: 19820217

AS Assignment

Owner name: SELAS CORPORATION OF AMERICA A CORP. OF PA

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST PENNSYLVANIA BANK N.V., FOR ITSELF AND AS AGENT FOR THE PHILADELPHIA NATIONAL BANK;REEL/FRAME:004096/0520

Effective date: 19821231

AS Assignment

Owner name: BANCBOSTON FINANCIAL COMPANY,MASSACHUSETTS

Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA;REEL/FRAME:004557/0143

Effective date: 19860529

Owner name: BANCBOSTON FINANCIAL COMPANY, 100 FEDERAL STREET,

Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA;REEL/FRAME:004557/0143

Effective date: 19860529

AS Assignment

Owner name: SELAS CORPORATION OF AMERICA, PENNSYLVANIA

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCBOSTON FINANACIAL COMPANY A MA TRUST;REEL/FRAME:004945/0988

Effective date: 19880805

Owner name: SELAS CORPORATION OF AMERICA, DRESHER, PA 19025 A

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANCBOSTON FINANACIAL COMPANY A MA TRUST;REEL/FRAME:004945/0988

Effective date: 19880805