US3652070A - Cooling assembly for blast furnace shells - Google Patents

Cooling assembly for blast furnace shells Download PDF

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Publication number
US3652070A
US3652070A US866974A US3652070DA US3652070A US 3652070 A US3652070 A US 3652070A US 866974 A US866974 A US 866974A US 3652070D A US3652070D A US 3652070DA US 3652070 A US3652070 A US 3652070A
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United States
Prior art keywords
refractory material
pipe sections
blast furnace
cooling
shell
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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
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US866974A
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English (en)
Inventor
Hideo Sagara
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0018—Cooling of furnaces the cooling medium passing through a pattern of tubes
    • F27D2009/0021—Cooling of furnaces the cooling medium passing through a pattern of tubes with the parallel tube parts close to each other, e.g. a serpentine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0077—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for tempering, e.g. with cooling or heating circuits for temperature control of elements
    • F28D2021/0078—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for tempering, e.g. with cooling or heating circuits for temperature control of elements in the form of cooling walls

Definitions

  • the steel pipes upon casting come disadvantageously into contact with the hot molten iron so that they expand largely to deform and, at the same time, are carburized to become brittle while their partially unintimate contact with the cast iron makes their cooling effect non-uniform.
  • an involved technique is required for their manufacture. Consequently, accidents have often happened with the lining refractory material being reduced in strength owing to over heating or fall off occurring due to fusion and abrasion during operation of the furnace thereby uncovering the cooling plates so that the cooling plates, owing to over heating might be either cracked or burned off.
  • a plurality of sections of steel pipes communicated to the exterior for circulating a cooling medium such as water, and temperature sensing means extending inwardly beyond the steel pipes, the pipes being embedded in a wall made of a rapidly heatingand coolingresistant and high heat transfer refractory material such as silicon carbide.
  • a refractory material owing to its high heat transferability may be kept at a low temperature by circulating cooling water in the steel pipes embedded therein.
  • the refractory material although hot contents such as fused slag flow down along the inner surface thereof, never falls off through reduction in strength or fusion due to its over heating.
  • the fused slag deposits easily on the refractory material consisting of silicon carbide and solidifies rapidly to produce a dense slag layer on the coarse surface of the refractory material. This layer effectively prevents a high pressure gas within the furnace from leaking out and improves the heat shielding performance of the blast furnace thereby minimizing its heat loss.
  • the slag layer which adheres closely to the refractory material held at a low temperature, neither fuses nor falls off, and serves to protect the refractory material.
  • the refractory material though subjected to a high temperature and a rapid cooling before and after deposition and solidification of the slag layer, is satisfactorily protected against them, and neither is cracked nor decreases its strength.
  • the refractory material if cracked, is carried by the cooling pipes embedded therein without falling off, and the crack may be covered with the slag layer whereby the high pressure gas within the furnace is prevented from leaking out.
  • the water which might leak from the cooling pipes due to defects in their material, would permeate into the relatively porous refractory material and evaporate there to lower the temperature of the vicinity.
  • the temperature drop is sensed by means of any of the temperature sensing means embedded in the refractory material so that the pressure of the circulating water in the cooling pipes is reduced below the gas pressure within the furnace to prevent the leakage of water.
  • the circulation of water may also be switched over from the defective cooling pipe to a reserve cooling pipe to continue the operation of the blast furnace. In this case the cooling pipe out of operation or the reserve cooling pipe serves to reinforce the refractory material and to improve the heat transfer.
  • the steel pipes for circulating cooling water according to the invention which are not cast into hot molten iron as in the known stave-like cooling plates made of cast iron, neither deteriorates nor deforms. Since each cooling pipe may be made long in conformity with the dimensions of the blast furnaces, the number of connecting members for water inlet and outlet is reduced to decrease the circulating resistance of the cooling water.
  • the double arrangement of the cooling pipes, one of which is reserved, facilitates a long continuous opera tion of the blast furnace.
  • the reduction in number of the inlets and outlets for cooling water to be provided at the shell of a large-sized high pressure blast furnace increases the strength of the shell and reduces the number of sealing means for the inlets and outlets.
  • FIG. 1 is a vertical sectional view of a portion of a blast furnace, embodying the present invention, and illustrating the furnace in its initial brick-lined condition;
  • FIG. 2 is a view similar to FIG. 1 illustrating the furnace after an extended period of operation in which the brick has been eroded away and replaced by a layer of slag.
  • the reference numeral I denotes a portion of a thick steel plate shell of a blast furnace with a high inner pressure, on the inside of which is arranged a vertical loop 2 of steel pipe, for circulating cooling water, having a water inlet 2 and a water outlet 2".
  • Temperature sensing units 4 extend inwardly beyond the horizontal pipe loop 3.
  • the reference numeral 5 denotes a refractory material such as silicon carbide in which the pipe loops 2 and 3 are embedded. Fire clay bricks 6 are laid on the inside of the refractory material 5.
  • the reference numeral 7 denotes a blast furnace slag layer which has deposited on the inner surface of the refractory material after the fire clay bricks fell off.
  • the vertical pipe loop 2 and the horizontal pipe loop 3 are arranged in layers in the first place, and the temperature sensing units 4 are inserted therebetween.
  • a refractory mortar 5 of silicon carbide is placed around the pipe loops 2, 3 and the temperature sensing units 4, and the fire clay bricks 6 are held against the inside of the refractory mortar 5. After the mortar 5 has solidified, the shell cooling assembly of the blast furnace is completed.
  • cooling water from the inlet 3' is circulated in the horizontal pipe loop 3 to cool the refractory material 5 thereby preventing the reduction in strength of the fire clay bricks 6 due to overheating or the falling off thereof due to fusion and abrasion. Since the refractory material 5 surrounds the horizontal pipe 3 thoroughly, a satisfactory heat transfer at the contact surface therebetween may be obtained.
  • the contact surface between the refractory material 5 and the fire clay bricks 6 is made larger as shown so that the heat transfer at this surface is high.
  • the cooling effect of such cooling assembly is thus substantially the same as that of a prior cooling assembly composed of stave-like cooling plates made of cast iron with cooling pipes cast therein and fire clay bricks lining inside of the plates.
  • the cooling pipe 3 covered with a thick layer of the refractory material 5 would not come into direct contact with hot contents of the blast furnace, for example, fused slag as in the case where stave-like cooling plates are lined with fire clay bricks. If the fused slag should come into contact with the refractory material 5, it would be rapidly cooled and solidify thereby forming a solid slag layer 7 which in turn protects the refractory material 5.
  • the slag layer 7 is highly airtight and remarkably effective as a lining for a high pressure blast furnace.
  • the refractory material 5 stands rapid heating and cooling, and neither be cracks nor decreases in strength while the slag layer 7, which is satisfactorily cooled by the refractory material 5 without fusion or falling off, serves as a heat shield to reduce the heat loss of the furnace.
  • an airtight slag layer 7 may be easily produced by adhering fused slag within the furnace to the refractory material 5 and solidifying it.
  • the temperature of the refractory material 5 is sensed by means of the temperature sensing units 4 for either controlling the quantity of water to be circulated in the cooling pipe loop 3 or additionally circulating water in the cooling pipe loop 2 so that the degree of cooling of the refractory material is increased to promote the adhesion as well as the solidification of the fused slag,
  • the leakage of water which has been sensed by means of any of the temperature sensing units 4, may be prevented either by lowering the pressure of the circulating water below the gas pressure within the blast furnace or by locally stopping the circulation of water and changing over from one cooling pipe to the other This permits continuous operation of the furnace.
  • the pressure and the temperature of water to be circulated in the pipe loop 2 or 3 may be selected in the order of 10 atm, and l 80 C., respectively, so that steam is produced in the pipe 2 or 3.
  • the pressure and the temperature may be of the order of3 atm and 90 C, respectively, so that no steam is produced In the former case, it is effective in reducing heat loss to provide a heat insulating refractory layer between the shell 1 and the refractory material 5.
  • a cooling assembly for a blast furnace shell according to the invention composed of a wall made of a refractory material having a high heat transfer and steel pipes 2, 3 for circulating a cooling medium such as water embedded therein, may, owing to a slag layer formed on the inside thereof, improve the airtightness and the heat shielding performance so that the thickness of the lining and thus the weight of the furnace is reduced while the inner volume thereof is increased.
  • the lower limit of the thermal conductivity of the refractory material may be raised up to several times as high as that of the lining 6 or 7, for example, 3-5 K.cal/m.h. C.
  • a cooling assembly for a blast furnace comprising a steel shell laterally enclosing and forming the lateral exterior surface of at least a portion of the blast furnace within which portion the pressure is higher than the atmospheric pressure on the outer surface of said shell, a layer of a high heat transfer refractory material on the inner surface of said shell, said refractory material being resistant to rapid heating and cooling and having an adhesion characteristic, to a fused slag, superior to that of silicon carbide, a plurality of steel pipe sections embedded in said layer of refractory material along the inner surface of said shell, means for connecting said steel pipe sections to at least one source of cooling medium located exteriorly of said shell for circulation of cooling medium through said pipe sections for control of the temperature of said layer of refractory material, and temperature sensin means positioned within said refractory material ad acent sai pipe sections and extending inwardly beyond said pipe sections, for sensing the temperature within said refractory material adjacent and inwardly of the surfaces of said pipe sections,
  • a cooling assembly for a blast furnace as set forth in claim 1, wherein said steel pipe sections comprises at least one vertically extending loop and at least one horizontally extending loop, and said means for connecting said steel pipe sections to a cooling medium source comprising a separate cooling medium inlet and outlet for each of said loops.
  • a cooling assembly for a blast furnace as set forth in claim 1, including fire clay bricks lining the inner surface of said refractory material within the blast furnace.
  • a cooling assembly for a blast furnace as set forth in claim 3, wherein the surfaces of said fire clay bricks in contact with the surface of said refractory material are shaped to increase the contacting area therebetween.
  • a cooling assembly for a blast furnace as set forth in claim 4, wherein the surfaces of said fire clay bricks in contact with said refractory material are beveled for increasing the surface contact between said fire clay bricks and said refractory material.
  • a cooling assembly for a blast furnace comprising a steel shell enclosing and forming the exterior surface of at least a portion of the blast furnace within which the pressure is higher than the atmospheric pressure on the outer surface of said shell, a plurality of steel pipe sections located along the inner surface of said shell, means for connecting said steel pipe sections to a cooling medium source located exteriorly of said shell for circulating the cooling medium through said pipe sections, a layer of high heat transfer refractory material embedding said pipe sections within the blast furnace, said refractory material being resistant to rapid heating and cooling and having a refractory characteristic substantially similar to that of silicon carbide, and temperature sensing means positioned within said refractory material adjacent said pipe sections for sensing the temperature within said refractory material adjacent the surfaces of said pipe sections, said steel pipe sections comprising at least one vertically extending loop and at least one horizontally extending loop, and said means for connecting said steel pipe sections to a cooling medium source comprising a separate cooling medium inlet and outlet for each of said loops, said vertically extending
  • a method of cooling a blast furnace comprising forming, on the interior surface of the shell of the blast furnace, a coating of a high heat transfer refractory material which is resistant to rapid heating and cooling and which has an adhesion characteristic to a fused slag superior to that of silicon carbide, circulating a cooling medium through a refractory material in a plurality of separate passages extending therethrough, sensing the temperature within the refractory material adjacent and inwardly of the passages for flow of cooling medium therethrough, and regulating the circulation of the cooling medium through the refractory material in response to the temperature sensed within the refractory material inwardly of the passage to control the adhesion of fused slag thereto.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US866974A 1968-10-22 1969-10-16 Cooling assembly for blast furnace shells Expired - Lifetime US3652070A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP43076927A JPS505125B1 (zh) 1968-10-22 1968-10-22

Publications (1)

Publication Number Publication Date
US3652070A true US3652070A (en) 1972-03-28

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US866974A Expired - Lifetime US3652070A (en) 1968-10-22 1969-10-16 Cooling assembly for blast furnace shells

Country Status (7)

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US (1) US3652070A (zh)
JP (1) JPS505125B1 (zh)
AT (1) AT294152B (zh)
BE (1) BE740557A (zh)
DE (1) DE1952908A1 (zh)
FR (1) FR2021222A1 (zh)
GB (1) GB1250369A (zh)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810610A (en) * 1972-09-11 1974-05-14 Andco Inc Bosh construction for metallurgical furnaces
US3953007A (en) * 1973-09-12 1976-04-27 Hoogovens Ijmuiden B.V. Wall construction of a shaft furnace
US3984089A (en) * 1973-03-19 1976-10-05 Hoogovens Ijmuiden B.V. Cooled refractory lined shaft furnace and stave-cooler to be used therefore
US4193355A (en) * 1977-04-18 1980-03-18 Houilleres Du Bassin Du Nord Et Du Pas De Calais Furnace walls which can be used at high temperatures
US4206312A (en) * 1977-12-19 1980-06-03 Sidepal S.A. Societe Industrielle De Participations Luxembourgeoise Cooled jacket for electric arc furnaces
US4225122A (en) * 1977-04-06 1980-09-30 L. & C. Steinmuller Gmbh Device for cooling plate coolers of blast furnaces
US4230307A (en) * 1977-09-26 1980-10-28 O'okiep Copper Company Limited Cooling apparatus for copper converter opening
US4249723A (en) * 1978-06-14 1981-02-10 Gutehoffnungshutte Sterkrade Aktiengesellschaft Cooling device for smelting plants
US4310147A (en) * 1979-08-13 1982-01-12 Widmer Colin F Cooled components for furnaces
EP0044512A1 (de) * 1980-07-19 1982-01-27 Fuchs Systemtechnik GmbH Verfahren und Vorrichtung zum Kühlen von Gefässteilen eines metallurgischen Ofens, insbesondere eines Lichtbogenofens
EP0075420A1 (en) * 1981-09-14 1983-03-30 Betz Europe, Inc. Apparatus and method for detecting fouled cooling circuits in a blast furnace or the like
US4440509A (en) * 1982-03-29 1984-04-03 The Babcock & Wilcox Company Detection of hot and cold spots in chemical reactors
US5060913A (en) * 1989-08-30 1991-10-29 Regents Of The University Of Minnesota Integrated metallurgical reactor
US5295666A (en) * 1989-11-14 1994-03-22 Chavane-Ketin Cooling plates for blast furnaces and cooling installation employing this type of plate
US5961322A (en) * 1997-05-15 1999-10-05 Coble; Gary L. Water cooled inner cover for annealing furnace
US6007873A (en) * 1996-05-09 1999-12-28 Equity Enterprises High emissivity coating composition and method of use
US6244197B1 (en) 1999-01-04 2001-06-12 Gary L. Coble Thermal induced cooling of industrial furnace components
US20080110380A1 (en) * 2006-11-02 2008-05-15 Francois Gauthier Renewable Fuel Source Burner for a Furnace
US20080289793A1 (en) * 2007-05-22 2008-11-27 Gerald Geiken Thermal energy storage systems and methods
US20090294092A1 (en) * 2008-05-30 2009-12-03 Bahl Carsten Device and system for storing thermal energy
US20120222354A1 (en) * 2010-03-29 2012-09-06 Wei Chen Refractory walls, and gasification devices and methods
US20140154140A1 (en) * 2012-11-30 2014-06-05 Lummus Technology Inc. Thermal sensing system
US20220128430A1 (en) * 2017-04-05 2022-04-28 Tenova Goodfellow Inc. Method and Apparatus for Acoustically Detecting Fluid Leaks
CN115159526A (zh) * 2022-07-04 2022-10-11 重庆市黔永硅业有限公司 一种工业硅的节能环保生产系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54129362U (zh) * 1978-03-01 1979-09-08
IT1160001B (it) * 1978-10-23 1987-03-04 Fontanini Paolo Pannelli raffreddati per pareti di forni elettrici
FR2521701B1 (fr) * 1982-02-16 1987-01-09 G Sojuzny I Dispositif pour le refroidissement de la paroi des fours a cuve
FR2521702A1 (fr) * 1982-02-18 1983-08-19 G Sojuzny I Dispositif de refroidissement de la paroi conique d'un four a cuve
EP1473517A1 (de) * 2003-04-30 2004-11-03 Siemens Aktiengesellschaft Brennkammer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186740A (en) * 1939-02-17 1940-01-09 Teeters Thomas Furnace construction
US2465463A (en) * 1943-05-29 1949-03-29 Steel Ingot Production Inc Remelting furnace and method for remelting scrap
US2686666A (en) * 1950-02-17 1954-08-17 Charity Belcher Tau Hearth cooling means
US2805851A (en) * 1953-11-23 1957-09-10 Becker Ernst Temperature regulating means for furnaces
US2915305A (en) * 1957-10-17 1959-12-01 Inland Steel Co Blast furnace salamander charting
US3034776A (en) * 1952-02-08 1962-05-15 Lurgi Ges Fur Chemie Und Hutte Rotary furnace
US3193272A (en) * 1962-07-02 1965-07-06 Pintsch Bamag Ag Converter for steel plants
US3386720A (en) * 1963-03-08 1968-06-04 Fritz Karl Metal-coating furnace

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186740A (en) * 1939-02-17 1940-01-09 Teeters Thomas Furnace construction
US2465463A (en) * 1943-05-29 1949-03-29 Steel Ingot Production Inc Remelting furnace and method for remelting scrap
US2686666A (en) * 1950-02-17 1954-08-17 Charity Belcher Tau Hearth cooling means
US3034776A (en) * 1952-02-08 1962-05-15 Lurgi Ges Fur Chemie Und Hutte Rotary furnace
US2805851A (en) * 1953-11-23 1957-09-10 Becker Ernst Temperature regulating means for furnaces
US2915305A (en) * 1957-10-17 1959-12-01 Inland Steel Co Blast furnace salamander charting
US3193272A (en) * 1962-07-02 1965-07-06 Pintsch Bamag Ag Converter for steel plants
US3386720A (en) * 1963-03-08 1968-06-04 Fritz Karl Metal-coating furnace

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
German printed application; Wenzel; K16970 V1/18a published 10/4/56 *
Publication: Iron and Steel Engineer; May, 1968; pp. 89 97, by William E. Slagley. *

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810610A (en) * 1972-09-11 1974-05-14 Andco Inc Bosh construction for metallurgical furnaces
US3984089A (en) * 1973-03-19 1976-10-05 Hoogovens Ijmuiden B.V. Cooled refractory lined shaft furnace and stave-cooler to be used therefore
US3953007A (en) * 1973-09-12 1976-04-27 Hoogovens Ijmuiden B.V. Wall construction of a shaft furnace
US4225122A (en) * 1977-04-06 1980-09-30 L. & C. Steinmuller Gmbh Device for cooling plate coolers of blast furnaces
US4193355A (en) * 1977-04-18 1980-03-18 Houilleres Du Bassin Du Nord Et Du Pas De Calais Furnace walls which can be used at high temperatures
US4230307A (en) * 1977-09-26 1980-10-28 O'okiep Copper Company Limited Cooling apparatus for copper converter opening
US4206312A (en) * 1977-12-19 1980-06-03 Sidepal S.A. Societe Industrielle De Participations Luxembourgeoise Cooled jacket for electric arc furnaces
US4249723A (en) * 1978-06-14 1981-02-10 Gutehoffnungshutte Sterkrade Aktiengesellschaft Cooling device for smelting plants
US4310147A (en) * 1979-08-13 1982-01-12 Widmer Colin F Cooled components for furnaces
EP0044512A1 (de) * 1980-07-19 1982-01-27 Fuchs Systemtechnik GmbH Verfahren und Vorrichtung zum Kühlen von Gefässteilen eines metallurgischen Ofens, insbesondere eines Lichtbogenofens
EP0075420A1 (en) * 1981-09-14 1983-03-30 Betz Europe, Inc. Apparatus and method for detecting fouled cooling circuits in a blast furnace or the like
US4440509A (en) * 1982-03-29 1984-04-03 The Babcock & Wilcox Company Detection of hot and cold spots in chemical reactors
US5060913A (en) * 1989-08-30 1991-10-29 Regents Of The University Of Minnesota Integrated metallurgical reactor
US5295666A (en) * 1989-11-14 1994-03-22 Chavane-Ketin Cooling plates for blast furnaces and cooling installation employing this type of plate
US6007873A (en) * 1996-05-09 1999-12-28 Equity Enterprises High emissivity coating composition and method of use
US5961322A (en) * 1997-05-15 1999-10-05 Coble; Gary L. Water cooled inner cover for annealing furnace
US6244197B1 (en) 1999-01-04 2001-06-12 Gary L. Coble Thermal induced cooling of industrial furnace components
US20080110380A1 (en) * 2006-11-02 2008-05-15 Francois Gauthier Renewable Fuel Source Burner for a Furnace
US20080289793A1 (en) * 2007-05-22 2008-11-27 Gerald Geiken Thermal energy storage systems and methods
US20090294092A1 (en) * 2008-05-30 2009-12-03 Bahl Carsten Device and system for storing thermal energy
US20120222354A1 (en) * 2010-03-29 2012-09-06 Wei Chen Refractory walls, and gasification devices and methods
AU2011201275B2 (en) * 2010-03-29 2016-10-20 General Electric Company Refractory walls, and gasification devices and methods
US9702628B2 (en) * 2010-03-29 2017-07-11 General Electric Company Refractory walls, and gasification devices and methods
US20140154140A1 (en) * 2012-11-30 2014-06-05 Lummus Technology Inc. Thermal sensing system
US9766133B2 (en) * 2012-11-30 2017-09-19 Lummus Technology Inc. Thermal sensing system
US20220128430A1 (en) * 2017-04-05 2022-04-28 Tenova Goodfellow Inc. Method and Apparatus for Acoustically Detecting Fluid Leaks
US11913857B2 (en) * 2017-04-05 2024-02-27 Tenova Goodfellow Inc. Method and apparatus for acoustically detecting fluid leaks
CN115159526A (zh) * 2022-07-04 2022-10-11 重庆市黔永硅业有限公司 一种工业硅的节能环保生产系统

Also Published As

Publication number Publication date
FR2021222A1 (zh) 1970-07-17
DE1952908A1 (de) 1971-02-04
BE740557A (zh) 1970-04-01
GB1250369A (zh) 1971-10-20
JPS505125B1 (zh) 1975-02-28
AT294152B (de) 1971-10-15

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