US3802833A - Refractory masonry wall bounding a space which receives hot gas - Google Patents

Refractory masonry wall bounding a space which receives hot gas Download PDF

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Publication number
US3802833A
US3802833A US00284728A US28472872A US3802833A US 3802833 A US3802833 A US 3802833A US 00284728 A US00284728 A US 00284728A US 28472872 A US28472872 A US 28472872A US 3802833 A US3802833 A US 3802833A
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refractory
masonry
wall
layer
bricks
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US00284728A
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English (en)
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H Weber
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Hoogovens Ijmuiden BV
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Hoogovens Ijmuiden BV
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C21B9/06—Linings

Definitions

  • the invention relates to a refractory masonry wall bounding a space which receives hot gas, and being pierced by a gas duct connection, into the space, eg, a hot blast stove for preheating air for a blast furnace, with a hot air outlet duct.
  • the wall has adjacent the space a layer of refractory masonry which includes a ring of bricks surrounding the gas duct at-its entry into the space, there being a joint allowing relative slinding between the layer, including the ring of bricks, and outwardly adjacent refractory masonry of the wall.
  • This invention relates to a refractory masonry wall, for a space which receives hot gas, which is pierced by a gas duct and also to a structure including such a wall, e.g., a blast furnace stove, hot blast stove, or cowper stove of the regenerator type, which is used for preheating the air for a blast furnace.
  • Structures to which the invention are particularly applicable are those within which high temperatures prevail of an order of magnitude which require a refractory masonry structure for the inner wall of the structure.
  • a particular example of such a structure is the above-mentioned hot blast stove, used for supplying pre-heated air at a temperature of 800 to 1,400 C to a blast furnace for iron ore reduction.
  • the invention will for the most part in the following specification be described and explained in terms of such a hot blast stove, it is not restricted thereto.
  • the outlet duct for the hot air is connected to a cylindrical wall part of the stove.
  • the masonry structure of the outlet duct extends inwardly into the stove to the inner wall of the masonry structure of the cylindrical wall of the vessel. This makes the brick laying very simple and keeps to a minimum the number of refractory bricks of non-standard shapes.
  • the present invention is, however, based upon the realization that it is exactly this known manner of laying bricks which is in part responsible for the difficulties discussed above.
  • Such difficulties particularly have their origin in the fact that the masonry structure of the outlet duct, whichas said extends inwardly into the stove can form an obstacle to movement of the masonry structure of the cylindrical wall part as a result of thermal expansion. The problem becomes greater the higher the position of the outlet duct in the vessel.
  • a wall bounding a space which receives hot gas and being pierced by a gas duct connection into the space, the wall having adjacent the space a layer of refractory masonry which includes a ring of bricks surrounding the gas duct at its entry into the space, there being a joint allowing relative sliding between the layer, including the ring of bricks, and outwardly adjacent refractory masonry of the wall.
  • the said layer is the innermost of a plurality of refractory masonry layers, each including a ring of bricks surrounding the gas duct, there being a joint allowing relative sliding between the or each pair of adjacent said layers and between the outermost layer and outwardly adjacent refractory masonry of the wall.
  • This amount may correspond to the free displacement of said ring or rings when the wall is heated to operating temperature which is the calculable free thermal expansion of the inner layers of the masonry structure along the sliding joints.
  • the wall is the wall of a hot blast stove with a so-called ceramic burner being mounted within the wall in the lower end of the burner stack
  • the calculation will take into account the operating temperature to be expected in the several layers of the masonry structure, the expansion of these layers on heating to this temperature being calculated from the top face of the ceramic burner to the outlet for the heated air (hot blast). In general such a calculation will be possible for a particular case and will not cause difficulties to the expert.
  • the said ring or rings of refractory bricks have adequate stability in themselves and are anchored correctly in the surrounding masonry. This latter requirement is particularly of importance if, as a result of an expansion of the masonry structure surrounding the gas duct further from the connection of the duct into the hot gas space, the ring or rings would be stressed by a compressive force tending to push it or them into the space.
  • the bricks in the or each said ring have interlocking projections and recesses in their mutually abutting surfaces.
  • each adjacent pair of bricks has two pairs of interlocking projections and recesses, one pair extending longitudinally at an angle to the other pair. Thereby higher stability is obtained and a relative sliding of the bricks with respect to each other is not possible.
  • the wall has, in the area of the duct connection, a curved inner surface
  • the bricks of the or each said ring have, opposite their faces which face into the gas duct, faces which are in planes substantially perpendicular to the said inner face.
  • the gas duct further from the hot gas space from the said ring or rings of bricks, is bounded by masonry which is joined to the adjacent said ring of bricks by a joint allowing-relative sliding and is provided with an expansion gap to allow expansion in the direction away from the hot gas space.
  • the shape of the said ring or rings of bricks may be of any suitable shape to correspond with the shape of the gas duct.
  • the invention also provides a structure, particularly a regenerator stove for preheating air for a blast furnace which has a wall according to the invention as described above.
  • FIG. I shows part of the wall' of a hot blast stove for a blast furnace in horizontal section
  • FIG. 2 shows part of the wall (when cold) of FIG; 1 vertical section along the line IIlI of FIG. 1; i j FIG. 3 is a part cross-section of through the middle of the bricks ll of the ring 6 looking in the direction of the arrow III of FIG. 2;
  • FIG. 4 is a sectional view through both rings 6, 7 of bricks showing their end faces lying in axial planes of the duct, looking in the direction of the arrow IV of FIG. 3.
  • the air preheater, cowper or hot blast stove which preheats the air to be fed a blast furnace has a hot air outlet connection which is shown in horizontal section in FIG. 1.
  • the structure of the air preheater is in the main of a known and usual type, e.g., as shown in British Pat. Nos. 1,212,177 and 1,250,443 and U.S. Pat. Nos. 3,550,918 and 3,642,262, so that it need not be described in detail here.
  • the air preheater has an outer steel jacket 1 which is connected to an outer steel wall 2 of the hot air outlet duct 4.
  • the wall 2 terminates outwardly in a flange 3.
  • Within the steel wall 2 of the duct there is a masonry wall.
  • Both the refractory masonry structure of the preheater wall and of the duct wall are only shown somewhat diagrammatically except where most exact detail is necessary for a good understanding of the invention. Those parts not shown in exact detail are embodied according to generally known and accepted principles.
  • the hot'air duct 4 pierces the refractory wall within the jacket Ito open into the space within the wall.
  • the refractory wall within the jacket 1 consists of an innermost layer 14, a layer 15 surrounding the layer 14, both the layers 14,15. being of refractory brick,'and outside the layer 15 an insulating layer 8 which extends to the steel jacket 1.
  • Layers 8, 14 and 15 are mutually separated by sliding joints 9,10.
  • the portions of the layers 14,15 immediately surrounding the duct 4 are constituted by rings 6,7 of bricks ll, 12 respectively, which are separated from each other and the ring 12 from the layer 8 portions of the sliding joints 9,100
  • FIGS. land 2 it-will be clear from FIGS. land 2 that the layer 14, including the ring 6, and the layer 15, including the ring 7, are able to move in a vertical direction with respect to each other and withrespect to the further layer 8, and thus differences of expansion of the layers can be accommodated freely by displacements of the layers relative to each other in an essentially vertical direction.
  • a continuous insulating layer 8 is constructed in contact with the steel jacket 1 and with the steel wall 2 of the duct and will usually consist of porous bricks of fire clay brick (chamotte) type and quality.
  • the portion of the insulating layer 8 within the jacket 1 has an approximately equal thickness throughout, and the same is true for the portion of the layer 8 within the duct part 2.
  • material of different insulating coefficient instead of varying the thickness of the layer. This is, however, not essential for the successful application of the invention as such.
  • Lining the insulating layer 8 within the steel outlet duct wall 2 and providing the wall of the duct 4, is a layer 13 of masonry formed by refractory bricks of high quality. This layer 13 terminates at its end nearest the space within the stove at the sliding joint 10, and at its other end in the area of the flange 3, but the lyaer 13 does not extend as far as the outer face of the flange 3, so that the layer 13 can expand without compressing the sliding joints 9, 10 and putting the rings 6,7 of bricks 11,12 under axial pressure.
  • adjacent bricks 11 of the ring 6 have, in their mutually abutting surfaces, projections 18,19 received in corresponding recesses so that a good interlocking is obtained in the ring 6.
  • the two projections 18,19 (and the corresponding recesses) of any one brick are not parallel, but run at an angle to each other, whereby a very sound interlocking of the bricks against relative movement is obtained.
  • a refractory masonry wall structure bounding a space which receives hot gas which comprises a refractory masonry wall, a gas duct connection passing through said wall forming an entrance thereinto, at least one layer of refractory masonry circumferentially surrounding said gas duct connection at its entry through said wall, said masonry including an inner ring of refractory bricks, and a layer of insulating masonry material outwardly adjacent to said refractory layer circumferentially surrounding said gas duct connection, and a sliding joint between said refractory masonry layer including said ring of brick and said insulating masonry layer to permit relative sliding movement of said layers in a vertical direction with respect to one another.
  • said refractory masonry layer includes a first inner ring of refractory bricks and an outwardly adjacent second inner ring of refractory brick, and a sliding joint between said first and said second inner rings of brick to permit relative sliding movement of said first and second inner rings in a vertical direction with respect to one another.
  • Apparatus for preheating air for a blast furnace comprising a regenerator stove havine a refractory masonry wall structure bounding a space which receives hot gas which comprises a refractory masonry wall, a
  • gas duct connection passing through said wall forming an entrance thereinto, at least one layer of refractory masonry circumferentially surrounding said gas duct connection at its entry through said wall, said masonry including an inner ring of refractory bricks, and a layer of insulating masonry material outwardly adjacent to said refractory layer circumferentially surrounding said gas duct connection, and a sliding joint between said refractory masonry layer including said ring of brick and said insulating masonry layer to permit relative sliding movement of said layers in a vertical direction with respect to one another.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Incineration Of Waste (AREA)
US00284728A 1971-09-07 1972-08-30 Refractory masonry wall bounding a space which receives hot gas Expired - Lifetime US3802833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7112336A NL167997C (nl) 1971-09-07 1971-09-07 Thermisch vat met een vuurvaste binnen bemetseling en met een gasaansluitstuk.

Publications (1)

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US3802833A true US3802833A (en) 1974-04-09

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US (1) US3802833A (enrdf_load_html_response)
JP (1) JPS5641912B2 (enrdf_load_html_response)
BE (1) BE788246A (enrdf_load_html_response)
BR (1) BR7206173D0 (enrdf_load_html_response)
CA (1) CA974757A (enrdf_load_html_response)
DE (1) DE2243517C3 (enrdf_load_html_response)
FR (1) FR2152127A5 (enrdf_load_html_response)
GB (1) GB1354049A (enrdf_load_html_response)
IT (1) IT974943B (enrdf_load_html_response)
NL (1) NL167997C (enrdf_load_html_response)
SE (1) SE385022B (enrdf_load_html_response)
SU (1) SU423310A3 (enrdf_load_html_response)
ZA (1) ZA725919B (enrdf_load_html_response)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478575A (en) * 1981-11-19 1984-10-23 Raymond Kaiser Engineers Inc. Blast furnace stove outlet
US4734031A (en) * 1985-10-30 1988-03-29 Micropore International Limited Vessel for holding high temperature bulk materials
US4997366A (en) * 1990-02-05 1991-03-05 Micro Control Company Rear wall construction for burn-in environmental systems
US5357540A (en) * 1992-08-28 1994-10-18 Merkle Engineers Inc. High temperature industrial furnace roof structure
US6427610B1 (en) * 2000-10-11 2002-08-06 Merkle Engineers, Inc. High temperature industrial furnace roof structure
US20030140558A1 (en) * 2002-01-23 2003-07-31 Texaco Development Corporation And Texaco, Inc. Refractory protected replaceable insert
EP1990429A1 (en) * 2007-05-07 2008-11-12 Paul Wurth Refractory & Engineering GmbH Method for constructing a support ring in a curved wall
CN112066733A (zh) * 2020-09-16 2020-12-11 金川集团股份有限公司 一种卧式转炉炉口区域内衬过渡组合结构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0621498Y2 (ja) * 1988-07-26 1994-06-08 タツタ電線株式会社 耐火気密床貫通部
CN112082380A (zh) * 2020-09-16 2020-12-15 金川集团股份有限公司 一种卧式转炉炉口内衬砌筑结构
CN112082383A (zh) * 2020-09-16 2020-12-15 金川集团股份有限公司 一种卧式转炉炉口区域内衬砌筑结构
CN114107586B (zh) * 2021-12-10 2023-02-07 中冶南方武汉钢铁设计研究院有限公司 热风炉系统和热风出口组合砖

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL162433C (nl) * 1968-08-09 1980-05-16 Koninklijke Hoogovens En Staal Warmteregenerator, in het bijzonder een windverhitter ten behoeve van een hoogoven.

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478575A (en) * 1981-11-19 1984-10-23 Raymond Kaiser Engineers Inc. Blast furnace stove outlet
US4734031A (en) * 1985-10-30 1988-03-29 Micropore International Limited Vessel for holding high temperature bulk materials
US4997366A (en) * 1990-02-05 1991-03-05 Micro Control Company Rear wall construction for burn-in environmental systems
US5357540A (en) * 1992-08-28 1994-10-18 Merkle Engineers Inc. High temperature industrial furnace roof structure
US6427610B1 (en) * 2000-10-11 2002-08-06 Merkle Engineers, Inc. High temperature industrial furnace roof structure
US7921533B2 (en) 2002-01-23 2011-04-12 Ge Energy (Usa) Llc Refractory protected replaceable insert
US20030140558A1 (en) * 2002-01-23 2003-07-31 Texaco Development Corporation And Texaco, Inc. Refractory protected replaceable insert
US7141085B2 (en) 2002-01-23 2006-11-28 Texaco Inc. Refractory protected replaceable insert
US20070151085A1 (en) * 2002-01-23 2007-07-05 Texaco Inc. Refractory protected replaceable insert
EP1990429A1 (en) * 2007-05-07 2008-11-12 Paul Wurth Refractory & Engineering GmbH Method for constructing a support ring in a curved wall
US20100281672A1 (en) * 2007-05-07 2010-11-11 Paul Wurth Refractory & Engineering Gmbh Method for constructing a support ring in a curved wall
WO2008135505A1 (en) * 2007-05-07 2008-11-13 Paul Wurth Refractory & Engineering Gmbh Method for constructing a support ring in a curved wall
AU2008248631B2 (en) * 2007-05-07 2011-05-19 Paul Wurth Refractory & Engineering Gmbh Method for constructing a support ring in a curved wall
EA015972B1 (ru) * 2007-05-07 2012-01-30 Поль Вурт Рифректори Унд Энджиниринг Гмбх Способ сооружения опорного кольца в криволинейной стене
CN101680043B (zh) * 2007-05-07 2012-08-22 保尔伍斯耐火材料与工程有限责任公司 用于构造曲壁中的支撑环的方法
US8418339B2 (en) 2007-05-07 2013-04-16 Paul Wurth Refractory & Engineering Gmbh Method for constructing a support ring in a curved wall
TWI427151B (zh) * 2007-05-07 2014-02-21 保爾伍斯耐火材料與工程有限責任公司 用於構造曲壁中的支撐環的方法
CN112066733A (zh) * 2020-09-16 2020-12-11 金川集团股份有限公司 一种卧式转炉炉口区域内衬过渡组合结构

Also Published As

Publication number Publication date
IT974943B (it) 1974-07-10
NL167997C (nl) 1982-02-16
DE2243517C3 (de) 1984-02-09
BR7206173D0 (pt) 1973-09-18
JPS4839517A (enrdf_load_html_response) 1973-06-11
JPS5641912B2 (enrdf_load_html_response) 1981-10-01
ZA725919B (en) 1973-05-30
CA974757A (en) 1975-09-23
DE2243517A1 (de) 1973-03-15
GB1354049A (en) 1974-06-05
SE385022B (sv) 1976-05-31
FR2152127A5 (enrdf_load_html_response) 1973-04-20
SU423310A3 (ru) 1974-04-05
NL7112336A (enrdf_load_html_response) 1973-03-09
BE788246A (fr) 1973-02-28
DE2243517B2 (de) 1978-10-19

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