US3378249A - Furnace underhearth cooling apparatus - Google Patents

Furnace underhearth cooling apparatus Download PDF

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US3378249A
US3378249A US416784A US41678464A US3378249A US 3378249 A US3378249 A US 3378249A US 416784 A US416784 A US 416784A US 41678464 A US41678464 A US 41678464A US 3378249 A US3378249 A US 3378249A
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cooler
hearth
sections
cooling
furnace
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George L French
William G Seacrest
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Bethlehem Steel Corp
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • C21B7/106—Cooling of the furnace bottom

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  • a composite cooler interposed between the hearth of a blast furnace and its foundation to cool the hearth bottom.
  • the composite cooler is formed of several spaced sections each having cooling fluid inlet and outlet ducts. The sections are connected at their peripheries so that outward expansion is restrained while inward expansion toward the hottest inner area beneath the hearth is permitted.
  • This invention relates to means for cooling hearth bottoms of metallurgical shaft furnaces and more particularly to improved means for underhearth cooling of carbon lined hearths of iron-making blast furnaces.
  • the temperature of molten iron in the hearth of a blast furnace exceeds 2600 F. Because of this high temperaature it has ⁇ been necessary to provide some form of cooling for these hearths.
  • the conventional manner of cooling the hearth was by means of a water jacket around the circumference of the cylindrical side wall.
  • Many large blast furnaces have hearth diameters which exceed twenty-six feet, and from the center to the outer periphery of the bottom of the linings of these hearths the temperature gradient may exceed 1600 F.
  • Any cooling system installed beneath a blast furnace hearth must be designed to withstand this large temperature differential and, above all, must remain sealed so that there is no leakage of the cooling medium into the hearth bottom. Leakage of water or air, the cooling mediums most frequently used, into a hearth bottom will create a serious situation. Molten metal in Contact with water will react with explosive violence, and in the case of a carbon lined hearth any leakage of air into the hearth will cause the carbon to burn rapidly.
  • FIGURE 1 is a vertical sectional view of a portion of the bottom of a blast furnace which has a carbon lined hearth and which is equipped with the cooling means of this invention.
  • FIGURE 2 is a plan view of the improved blast furnace underhearth cooling means of this invention with the top removed from one section to show, in detail, its internal construction.
  • the outline of the furnace shell is indicated diagrammatically by a broken line, and a small portion of the shell plate is shown in cross section on the lower left hand portion of the cooling means.
  • FIGURE 3 is a sectional View on an enlarged scale taken on line 3-3 of FIGURE 2.
  • FIGURE 4 is a section-al view on an enlarged scale taken on line 4--4 of FIGURE 2.
  • blast furnace hearth 1l which comprises steel jacket 11, surrounded by heat exchange jacket 12- which provides a means of cooling the periphery of the hearth, circular side Wall 13, and bottom 14.
  • Hearth side wall 13 and bottom 14 may be formed of any satisfactory material but, preferably, standard carbon bricks 15 are used in side wall 13 and large carbon blocks 16 are used for hearth bottom 14.
  • composite cooler 17, hereinafter more fully described Directly beneath hearth bottom t4 is composite cooler 17, hereinafter more fully described, which is securely welded to hearth jacket 11 at its lower end.
  • Foundation 18 supports the furnace structure.
  • Leveling grout 19, as in conventional construction, is forced, under pressure, between cooler 17 and foundation 18.
  • Cooler 17 cornprises a plurality of cooler sections 2t)V which are separated from one another by spaces 21, except at the outer ends of the cooler where sections 2t) are joined together by means of top closure plates 22, outer closure plates 12, and inner closure plates 24, as shown in detail inV FIGURE 4, in a manner hereinafter described.
  • Each cooler section 20 includes relatively thick upper plate 25, adapted to be disposed directly next to carbon hearth bottom 14, lower plate 26, inner end plate 27, side plate or plates 28, extending longitudinally of each section, and outer end or peripheral plate 29. These elements are joined together with continuous welds so that each cooler section 20 is sealed to prevent any leakage of the cooling medium.
  • a plurality of spaced apart separators 30, as for example T-bars extend vertically between upper plate 25 and lower plate 26 and horizontally, longitudinally of each section and parallel to side plate or plates 28, between inner end plate 27 and outer end or peripheral plate 29. These separators 30 divide each cooler section 20 into a plurality of ⁇ cooling chambers 3l.
  • a baille 32 also made of Tebars, extends ⁇ vertically between upper plate 25 and lower plate 26 and horizontally, parallel to separators 30, from outer peripheral plate 29 to a short distance from inner end plate 2.7 thereby dividing each chamber 31 into inlet passageway 33 and outlet or exhaust passageway 34.
  • inlet passageway 33 Near the outer end of each chamber inlet passageway 33 is inlet opening 35 in lower plate 26, and near the outer end of each chamber outlet or exhaust passageway 34 is exhaust opening 36 in upper plate 25.
  • a separate inlet manifold 37 is welded to the underside of lower plate 26, at its outer periphery, of each cooler section 20.
  • Each inlet manifold 37 extends beneath all the inlet openings 35 of its separate cooler section.
  • the separate cooler sections 2d and inlet manifolds 37 can be fabricated in any manner desired, but preferably outer end plate 29 of each cooler section is extended downwardly to also form the outer wall plate 29' of the manifold, and manifolds 37 and cooler sections 26 are fabricated as one unit,
  • An inlet duct 3S connects each inlet manifold 37 to a cooling fluid source, not shown.
  • An exhaust offtake 39 registers with each upper plate exhaust opening 36 and connects each cooler section chamber exhaust passageway 34 with exhaust manifold 40, which may serve one or more cooler sections. Each manifold di) exhausts to the atmosphere through duct 41. Within each exhaust offtake 39 is valve 42 which regulates the cooling medium flow from each separate chamber 31 of each cooler section 26.
  • the diameter of bottom cooler 17 is made sorncwhat larger than the diameter of hearth jacket 11 so that the inlet and exhaust ductwork can be easily connected to cooler sections 20.
  • top closure plates 22 extend between adjacent cooler section upper plates 25 from their outer periperal ends inwardly to a position just within shell jacket 11, directly beneath hearth bottom 14.
  • Outer closure plates 23 extend between outer peripheral plates 29 of adjacent cooler sections 2) and between outer wall plates 29', for the full height of these plates, of adjacent manifolds 37.
  • Inner closure plates 2li extend between adjacent cooler sections 26 downwardly from the inner end of top closure plates 22 to an elevation below that of lower plates 26.
  • Spaces 21 between adjacent cooler sections 29, except between inner closure plates 24 and outer closure plates 23 are filled with a compressible device or material 43, as for example a lime bonded vermiculite, such as Thermoake. Spaces 21 between inner closure plates 24 and outer closure plates 23 joining adjacent cooler sections 20 are lled with grout 19 at the same time that this material is forced between the cooler 17 and foundation 18.
  • a compressible device or material 43 as for example a lime bonded vermiculite, such as Thermoake.
  • the cooling medium preferably air, travels through separate ducts 38 to each section 2t? of the cooler.
  • air passes from its inlet manifold 37 through inlet openings 35 at the outer periphery of lower plate 26 into a plurality of cooling chambers 31.
  • air enters inlet passageway 33, flows to the inner end of the chamber then reverses its flow, following a path around bafiie 32, and passes through outlet passageway 34 and from the cham-ber through outlet opening 36.
  • Exhaust offtakes 39, manifolds 40, and ducts 41 carry the heated air to the atmosphere.
  • Cfttake valves 42 in each exhaust offtake 39 are used to balance the ow of air through the plurality of chambers 31 of the several Sections 20 of composite cooler 18. ln the event a cooling medium other than air is used, the cooling medium can, instead of being exhausted to the atmosphere, be cooled and recirculated through the system.
  • the major advantage of employing the composite cooler construction disclosed above is that the individual cooler sections, which each act as a separate cooler, can expand freely beneath the hearth, toward its inner hottest area.
  • the outer ends of the sections are joined so that their outward expansion is restrained, to a great degree, and this restraining influence forces the expansion to take place toward the hearth center.
  • Sealing of the spaces between the outer ends of the cooler sections by means of closure plates and grout prevents any infiltration of air 4 through these spaces into the hearth bottom.
  • the incorporation of the compressible material in the remainder of each of these spaces prevents air from occupying them initially during construction and later allows the cooler sections to expand into at least a portion of the space previously occupied by this refractory material as it is compressed.
  • On added adavntage of employing a plurality of cooler sections with a plurality of cooling chambers is that the hearth can be uniformly cooled and any hot spots can be easily and accurately located and remedial action taken.
  • a composite cooler for cooling the underside of a furnace hearth comprising:
  • (e) means at the outer periphery of said hearth joining said sections together to restrain outward eX- pansion of said cooler sections and to permit inward expansion thereof due to a temperature differential between the outer periphery and the inner area of the underside of said hearth,
  • sealing means extending between each pair of said cooler sections at the outer periphery thereof to prevent infiltration of air into said space between each pair of said cooler sections and into the bottom of said furnace hearth.
  • a composite cooler for cooling the underside of a furnace hearth comprising:
  • a composite cooler for cooling the underside of a furnace hearth comprising:
  • each said section comprising:
  • (c) means at the outer periphery of said hearth joining said sections together to restrain outward expansion of said cooler sections and to permit inward expansion thereof due to a temperature differential between 5 the outer periphery and the inner area of the underside of said hearth,
  • sealing means extending between each pair of said cooler sections at the outer periphery thereof to prevent infiltration of air into said space between each pair of said cooler sections and into the bottom of said Vfurnace hearth.
  • a composite cooler for cooling the underside of a furnace hearth comprising:
  • each said section comprising:
  • (c) means at the outer periphery of said cooler sections joining said sections together whereby outward expansion of said cooler sections due to a temperature differential between the outer periphery and the inner area of the underside of said hearth is restrained and inward expansion is permitted,
  • a composite cooler through which passes a cooling medium, for supporting and cooling the underside of a furnace hearth comprising:
  • each said section comprising:

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

April 16, 1968 G. L .FRENCH ETAL FuRNAcE UNDERHEARTH coomne APPARATUS 2 Sheets-Sheet 1 April 16, 1968 G. L.. FRENCH ET AL 3,378,249
FURNACE UNDERHEARTH COOLING APPARATUS 2 Sheets-Sheet 2 Filed Dec. 8, 1964 INVENTORS Ge orge L. Franc/1 h/i//iam G. Seacresf United States Patent O 3,378,249 FURNACE UNDERHEARTH COOLING APPARATUS George L. French, Center Valley, and William G.
Seacrest, Limeport, Pa., assignors, by mesne assignments, to Bethlehem Steel Corporation, a corporation of Delaware Filed' Dec. 8, 1964, Ser. No. 416,784 Claims. (Cl. 266-32) ABSTRACT OF THE DISCLOSURE A composite cooler interposed between the hearth of a blast furnace and its foundation to cool the hearth bottom. The composite cooler is formed of several spaced sections each having cooling fluid inlet and outlet ducts. The sections are connected at their peripheries so that outward expansion is restrained while inward expansion toward the hottest inner area beneath the hearth is permitted.
This invention relates to means for cooling hearth bottoms of metallurgical shaft furnaces and more particularly to improved means for underhearth cooling of carbon lined hearths of iron-making blast furnaces.
The temperature of molten iron in the hearth of a blast furnace exceeds 2600 F. Because of this high temperaature it has `been necessary to provide some form of cooling for these hearths. During the years when blast furnace hearths were lined exclusively with fire clay refractories the conventional manner of cooling the hearth was by means of a water jacket around the circumference of the cylindrical side wall.
As is well known, carbon is now being utilized in place of lire clay in hearth linings, because carbon can withstand higher temperatures, has a lower thermal expansion, is a `better conductor of heat, is lighter in weight and is more resistant to chemical attack and corrosion. Because of these superior properties carbon hearth linings last longer than -re clay linings, produce more iron tonnage between relinings, and are less susceptible to iron penetration and breakout. Hearths made of carbon, because of the higher rate of heat conductivity of this material, more readily transmit heat to hearth coolers thereby causing the iron freeze line, approximately 2100 F., to remain closer to the inner surface of the hearth than was previously the case with re clay lin-ings.
Cooling the bottom of a blast furnace hearth, lined with either carbon or lire clay, poses a number of serious problems. Many large blast furnaces have hearth diameters which exceed twenty-six feet, and from the center to the outer periphery of the bottom of the linings of these hearths the temperature gradient may exceed 1600 F. Any cooling system installed beneath a blast furnace hearth must be designed to withstand this large temperature differential and, above all, must remain sealed so that there is no leakage of the cooling medium into the hearth bottom. Leakage of water or air, the cooling mediums most frequently used, into a hearth bottom will create a serious situation. Molten metal in Contact with water will react with explosive violence, and in the case of a carbon lined hearth any leakage of air into the hearth will cause the carbon to burn rapidly.
Therefore it is a object of the present invention to provide an improved cooling means for carbon lined blast furnace hearths.
It is a `further object of this invention to provide an improved carbon lined hearth cooling means which will remain sealed whilecompensating for the differential temperature expansion and contraction caused by the temper- ICC ature gradient between the center and outer periphery of the hearth and `due to variations in furnace operating ternperatures. y
It is a still further object of this invention to provide an improved cooling means which will effectively cool the entire 'bottom area of a blast lfurnace hearth.
The objects and advantages of this invention will be more clearly understood from the following description with reference to the accompanying drawings in which:
FIGURE 1 is a vertical sectional view of a portion of the bottom of a blast furnace which has a carbon lined hearth and which is equipped with the cooling means of this invention.
FIGURE 2 is a plan view of the improved blast furnace underhearth cooling means of this invention with the top removed from one section to show, in detail, its internal construction. The outline of the furnace shell is indicated diagrammatically by a broken line, and a small portion of the shell plate is shown in cross section on the lower left hand portion of the cooling means.
FIGURE 3 is a sectional View on an enlarged scale taken on line 3-3 of FIGURE 2.
FIGURE 4 is a section-al view on an enlarged scale taken on line 4--4 of FIGURE 2.
Referring in detail to the drawings there is shown blast furnace hearth 1l) which comprises steel jacket 11, surrounded by heat exchange jacket 12- which provides a means of cooling the periphery of the hearth, circular side Wall 13, and bottom 14. Hearth side wall 13 and bottom 14 may be formed of any satisfactory material but, preferably, standard carbon bricks 15 are used in side wall 13 and large carbon blocks 16 are used for hearth bottom 14. Directly beneath hearth bottom t4 is composite cooler 17, hereinafter more fully described, which is securely welded to hearth jacket 11 at its lower end. Foundation 18 supports the furnace structure. Leveling grout 19, as in conventional construction, is forced, under pressure, between cooler 17 and foundation 18.
Although our invention can be embodied in different forms, we prefer to use a composite cooler constructed in a manner as shown in FIGURES 1-4. Cooler 17 cornprises a plurality of cooler sections 2t)V which are separated from one another by spaces 21, except at the outer ends of the cooler where sections 2t) are joined together by means of top closure plates 22, outer closure plates 12, and inner closure plates 24, as shown in detail inV FIGURE 4, in a manner hereinafter described.
Each cooler section 20 includes relatively thick upper plate 25, adapted to be disposed directly next to carbon hearth bottom 14, lower plate 26, inner end plate 27, side plate or plates 28, extending longitudinally of each section, and outer end or peripheral plate 29. These elements are joined together with continuous welds so that each cooler section 20 is sealed to prevent any leakage of the cooling medium. Within each cooler section 20 a plurality of spaced apart separators 30, as for example T-bars, extend vertically between upper plate 25 and lower plate 26 and horizontally, longitudinally of each section and parallel to side plate or plates 28, between inner end plate 27 and outer end or peripheral plate 29. These separators 30 divide each cooler section 20 into a plurality of `cooling chambers 3l. In each chamber 31 a baille 32, also made of Tebars, extends` vertically between upper plate 25 and lower plate 26 and horizontally, parallel to separators 30, from outer peripheral plate 29 to a short distance from inner end plate 2.7 thereby dividing each chamber 31 into inlet passageway 33 and outlet or exhaust passageway 34. Near the outer end of each chamber inlet passageway 33 is inlet opening 35 in lower plate 26, and near the outer end of each chamber outlet or exhaust passageway 34 is exhaust opening 36 in upper plate 25.
As shown in FIGURE l, a separate inlet manifold 37 is welded to the underside of lower plate 26, at its outer periphery, of each cooler section 20. Each inlet manifold 37 extends beneath all the inlet openings 35 of its separate cooler section. Naturally, the separate cooler sections 2d and inlet manifolds 37 can be fabricated in any manner desired, but preferably outer end plate 29 of each cooler section is extended downwardly to also form the outer wall plate 29' of the manifold, and manifolds 37 and cooler sections 26 are fabricated as one unit, An inlet duct 3S connects each inlet manifold 37 to a cooling fluid source, not shown. An exhaust offtake 39 registers with each upper plate exhaust opening 36 and connects each cooler section chamber exhaust passageway 34 with exhaust manifold 40, which may serve one or more cooler sections. Each manifold di) exhausts to the atmosphere through duct 41. Within each exhaust offtake 39 is valve 42 which regulates the cooling medium flow from each separate chamber 31 of each cooler section 26. Preferably, the diameter of bottom cooler 17 is made sorncwhat larger than the diameter of hearth jacket 11 so that the inlet and exhaust ductwork can be easily connected to cooler sections 20.
As mentioned above, the separate sections 26 of composite cooler 17 are separated by spaces 21 except at the outer ends of the sections where they are joined together by closure plates 22, 23 and 24, as shown in detail in FIGURE 4. Top closure plates 22 extend between adjacent cooler section upper plates 25 from their outer periperal ends inwardly to a position just within shell jacket 11, directly beneath hearth bottom 14. Outer closure plates 23 extend between outer peripheral plates 29 of adjacent cooler sections 2) and between outer wall plates 29', for the full height of these plates, of adjacent manifolds 37. Inner closure plates 2li extend between adjacent cooler sections 26 downwardly from the inner end of top closure plates 22 to an elevation below that of lower plates 26. Spaces 21 between adjacent cooler sections 29, except between inner closure plates 24 and outer closure plates 23 are filled with a compressible device or material 43, as for example a lime bonded vermiculite, such as Thermoake. Spaces 21 between inner closure plates 24 and outer closure plates 23 joining adjacent cooler sections 20 are lled with grout 19 at the same time that this material is forced between the cooler 17 and foundation 18.
In the operation of the improved composite coo-ler 17 of this invention, the cooling medium, preferably air, travels through separate ducts 38 to each section 2t? of the cooler. At each cooler section 20 air passes from its inlet manifold 37 through inlet openings 35 at the outer periphery of lower plate 26 into a plurality of cooling chambers 31. Within each cooling chamber 31 air enters inlet passageway 33, flows to the inner end of the chamber then reverses its flow, following a path around bafiie 32, and passes through outlet passageway 34 and from the cham-ber through outlet opening 36. Exhaust offtakes 39, manifolds 40, and ducts 41 carry the heated air to the atmosphere. Cfttake valves 42 in each exhaust offtake 39 are used to balance the ow of air through the plurality of chambers 31 of the several Sections 20 of composite cooler 18. ln the event a cooling medium other than air is used, the cooling medium can, instead of being exhausted to the atmosphere, be cooled and recirculated through the system.
The major advantage of employing the composite cooler construction disclosed above is that the individual cooler sections, which each act as a separate cooler, can expand freely beneath the hearth, toward its inner hottest area. The outer ends of the sections are joined so that their outward expansion is restrained, to a great degree, and this restraining influence forces the expansion to take place toward the hearth center. Sealing of the spaces between the outer ends of the cooler sections by means of closure plates and grout prevents any infiltration of air 4 through these spaces into the hearth bottom. The incorporation of the compressible material in the remainder of each of these spaces prevents air from occupying them initially during construction and later allows the cooler sections to expand into at least a portion of the space previously occupied by this refractory material as it is compressed. On added adavntage of employing a plurality of cooler sections with a plurality of cooling chambers is that the hearth can be uniformly cooled and any hot spots can be easily and accurately located and remedial action taken.
While the composite cooler heretofore described is particularly adapted for nnderhearth cooling of iron making blast furnaces, it will be understood that such a cooler can be used to advantage in many other types of furnaces where a uniform and efficient cooling is required.
While we have shown and described only one embodiment of our invention, it will be understood that this embodiment Iwas merely for the purpose of illustration and description and that there may be various embodiments within the general scope of the invention and the scope of the appended claims.
We claim:
1. A composite cooler for cooling the underside of a furnace hearth comprising:
(a) a plurality of separate cooler sections,
(b) a space between each pair of said cooler sections,
(c) means to allow a cooling medium to pass into each of said cooler sections,
(d) means to allow a cooling medium to pass out of each of said cooler sections,
(e) means at the outer periphery of said hearth joining said sections together to restrain outward eX- pansion of said cooler sections and to permit inward expansion thereof due to a temperature differential between the outer periphery and the inner area of the underside of said hearth,
(f) sealing means extending between each pair of said cooler sections at the outer periphery thereof to prevent infiltration of air into said space between each pair of said cooler sections and into the bottom of said furnace hearth.
2. A composite cooler for cooling the underside of a furnace hearth comprising:
(a) a plurality of separate cooler sections,
(b) a space between each pair of said cooler sections,
(c) means to allow a cooling medium to pass into each of said cooler sections,
(d) means to allow a cooling medium to pass out of each of said cooler sections,
(e) means at the outer periphery of said cooler sections joining said sections together whereby outward expansion of said cooler sections due to temperature differential between the outer periphery and the inner area of the underside of said hearth is restrained and inward expansion is permitted,
(f) compressible means in said space between each pair of said cooler sections to compensate for expansion of said sections at elevated temperatures.
3. A composite cooler for cooling the underside of a furnace hearth comprising:
(a) a plurality of separate cooler sections, each said section comprising:
( l) dividing means separating each said color section into a plurality of cooling chambers, (2) means to allow a cooling medium to pass into each of said cooling chambers, and (3) means to allow a cooling medium to pass out of each of said cooling chambers,
(b) a space between each pair of said cooler sections,
and
(c) means at the outer periphery of said hearth joining said sections together to restrain outward expansion of said cooler sections and to permit inward expansion thereof due to a temperature differential between 5 the outer periphery and the inner area of the underside of said hearth,
(d) sealing means extending between each pair of said cooler sections at the outer periphery thereof to prevent infiltration of air into said space between each pair of said cooler sections and into the bottom of said Vfurnace hearth.
4. A composite cooler for cooling the underside of a furnace hearth comprising:
(a) a plurality of separate cooler sections, each said section comprising:
( 1) dividing means separating each said cooler section into a plurality of cooling chambers, (2) means to allow a cooling medium to pass into each of said cooling chambers, and (3) means to allow a cooling rnedium to pass out `of each of said cooling chambers,
(b) a space between each pair of said cooler sections,
(c) means at the outer periphery of said cooler sections joining said sections together whereby outward expansion of said cooler sections due to a temperature differential between the outer periphery and the inner area of the underside of said hearth is restrained and inward expansion is permitted,
(d) compressible means in said space between each pair of said cooler sections to compensate for expansion of said sections at elevated temperatures.
5. A composite cooler, through which passes a cooling medium, for supporting and cooling the underside of a furnace hearth comprising:
(a) a plurality of separate cooler sections, each said section comprising:
( 1) a top horizontal plate, (2) a bottom horizontal plate, (3) a vertical outer peripheral plate, (4) vertical enclosing plates, (5) dividing means, extending inwardly from said outer peripheral plate and vertically between said top plate and said bottom plate, sepa rating each said cooler section into agpluralit of cooling chambers, (6) means to allow said cooling medium to pas into each of said cooling chambers, and (7) means to allow said cooling medium to pas out of each of said cooling chambers, (b) a space between each pair of said cooler sections (e) closure means in each said space, at the outer end thereof extending inwardly therefrom to a locatio: directly beneath said hearth, to restrain outward ex pansion of said cooler sections due to a temperatur differential between the outer periphery and th' vinner area of the underside of said hearth and tt permit inward expansion thereof, and (d) compressible rneansin said space to compensatl for expansion of said sections at elevated tempera tures.
References Cited UNITED STATES PATENTS 2,238,038 4/ 1941 Clutts 266--32 ,2,407,047 9/ 1946 West 266--31 )1 2,671,658 3/1954 Moore 266-32 2,697,598 12/ 1954 Atileck 266-31 2,991,061 7/ 1961 Boron 263--44 i 3,053,524 9/ 1962 Hoadley et a1 266--32 FOREIGN PATENTS 707,697 4/ 1954 Great Britain.
OTHER REFERENCES Under-Hearth `Cooling for Blast-Furnaces, Summers E.M., Journal of the Iron and Steel Institute, August 1960 pp. 405-409.
J. SPENCER OVERHOLSER, Primary Examiner. E. MAR, Assistant Examiner.
US416784A 1964-12-08 1964-12-08 Furnace underhearth cooling apparatus Expired - Lifetime US3378249A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599951A (en) * 1968-11-27 1971-08-17 Inland Steel Co Blast furnace hearth
US3831914A (en) * 1972-12-20 1974-08-27 Koppers Co Inc Metallurgical furnace
US4382585A (en) * 1979-02-26 1983-05-10 Kabel-u. Metallwerke Gutehoffnungshutte AG Cooling plate for furnaces
EP4726307A1 (en) 2024-10-09 2026-04-15 Primetals Technologies Austria GmbH Afterburner chamber system for heat removal from a melting unit

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2238038A (en) * 1939-01-24 1941-04-15 Jr Edward S Cornell Process of producing lateralprovided fittings
US2407047A (en) * 1944-10-20 1946-09-03 Blaw Knox Co Furnace closure
US2671658A (en) * 1951-02-14 1954-03-09 Meehanite Metal Corp Metal lined cupola
GB707697A (en) * 1952-04-29 1954-04-21 Oesterr Alpine Montan Improvements in and relating to blast furnaces
US2697598A (en) * 1953-06-16 1954-12-21 United States Steel Corp Cooling means for blast furnace walls
US2991061A (en) * 1958-03-05 1961-07-04 American Brake Shoe Co Furnace divider plates
US3053524A (en) * 1959-09-24 1962-09-11 Nat Steel Corp Tuyere and bosh cooling system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2238038A (en) * 1939-01-24 1941-04-15 Jr Edward S Cornell Process of producing lateralprovided fittings
US2407047A (en) * 1944-10-20 1946-09-03 Blaw Knox Co Furnace closure
US2671658A (en) * 1951-02-14 1954-03-09 Meehanite Metal Corp Metal lined cupola
GB707697A (en) * 1952-04-29 1954-04-21 Oesterr Alpine Montan Improvements in and relating to blast furnaces
US2697598A (en) * 1953-06-16 1954-12-21 United States Steel Corp Cooling means for blast furnace walls
US2991061A (en) * 1958-03-05 1961-07-04 American Brake Shoe Co Furnace divider plates
US3053524A (en) * 1959-09-24 1962-09-11 Nat Steel Corp Tuyere and bosh cooling system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599951A (en) * 1968-11-27 1971-08-17 Inland Steel Co Blast furnace hearth
US3831914A (en) * 1972-12-20 1974-08-27 Koppers Co Inc Metallurgical furnace
US4382585A (en) * 1979-02-26 1983-05-10 Kabel-u. Metallwerke Gutehoffnungshutte AG Cooling plate for furnaces
EP4726307A1 (en) 2024-10-09 2026-04-15 Primetals Technologies Austria GmbH Afterburner chamber system for heat removal from a melting unit
EP4726308A1 (en) * 2024-10-09 2026-04-15 Primetals Technologies Austria GmbH Afterburner chamber system for heat removal from an electric arc furnace

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