US3480125A - Fibrous insulating materials and channels lined with same - Google Patents

Fibrous insulating materials and channels lined with same Download PDF

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Publication number
US3480125A
US3480125A US536826A US3480125DA US3480125A US 3480125 A US3480125 A US 3480125A US 536826 A US536826 A US 536826A US 3480125D A US3480125D A US 3480125DA US 3480125 A US3480125 A US 3480125A
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US
United States
Prior art keywords
thickness
layer
sol
blanket
silica
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
US536826A
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English (en)
Inventor
Malcolm Donald Ash
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.)
Morgan Refractories Ltd
Original Assignee
Morgan Refractories Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Morgan Refractories Ltd filed Critical Morgan Refractories Ltd
Application granted granted Critical
Publication of US3480125A publication Critical patent/US3480125A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B22C23/02—Devices for coating moulds or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/5035—Silica
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/5089—Silica sols, alkyl, ammonium or alkali metal silicate cements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24926—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including ceramic, glass, porcelain or quartz layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree

Definitions

  • a ceramic blanket particularly suitable for lining apparatus handling molten metals, comprises a thickness of felted or matted ceramic fibres of alumina and silica stiffened by treatment with a silica sol from one surface part way only through its thickness towards the other surface. In this way part of the thickness is rigid enough to keep its shape but the remainder is resilient and resists shocks.
  • This invention comprises improvements in or relating to fibrous insulating materials.
  • thermal insulating material in the form of a blanket of felted heat-resisting fibres, for instance asbestos fibres, or glass fibres, or fibres formed from a melt of a mineral, or mineral mixture, containing alumina and silica.
  • felted heat-resisting fibres for instance asbestos fibres, or glass fibres, or fibres formed from a melt of a mineral, or mineral mixture, containing alumina and silica.
  • Such blankets as have been manufactured hitherto are flexible and this gives rise to diiiiculties or disadvantages in some applications. Therefore, for some purposes the blanket is preformed to a desired shape but in so doing the blanket may be so stilfened to avoid loss of shape in handling, that the heat-insulating properties are irnpaired, or that desirable resilience and compressibility of the surfaces are reduced to a large extent.
  • This invention provides improved means of stiffening heat insulation, such as a blanket, comprising a felted or matted layer of libres which are formed from a mineral, or mixture of minerals, containing alumina and silica, which means comprises applying a silica sol to one surface of the layer, the other surface being untreated.
  • the heat insulation so treated can be stattened only part way through its thickness and can retain a desired shape wit-hout a large reduction in the heat-insulating characteristicts occurring and Without substantial loss of the resilience and compressibility of the said other surface.
  • the libre layer say in the form of a blanket, may be cut to a desired shape before or after the stiffening process, and may be stiffened while supported on a former so as to have a desired final contour.
  • the silica sol employed can have a wide content range of solids. For instance good results are obtained using sols containing 'between 5% to 35% by weight of solids. Normally for ease of handling a sol having a solids content of between 9% and 21%, and preferably 9% to 11%, will be used.
  • FIG. 1 shows a blanket of ceramic fibres being treated
  • FIG. 2 shows the use of a treated layer of ceramic fibres as a lining for a molten metal launder.
  • a ceramic fibre blanket 10 (FIG. 1), whereof the fibres consist of alumina and silica and which has a density of 8 lbs. per cubic foot, is treated as indicated on one surface thereof 4by applying with a brush 12 a 30% solids silica sol at the rate of 1%. pints per square foot per inch thickness of the blanket.
  • the blanket is then dried and a product is obtained which is suiiiciently stiff to be handled but which ha-s a resilient surface so that the blanket has a significant degree of compressibility. Examination shows that the sol penetrates through about half the thickness of the blanket as indicated by the additional horizontal hatching 11.
  • a dosage of 3 pints per square foot per inch thickness resulted in a completely rigid product, the sol having penetrated the full thickness.
  • Example II A blanket as used in Example I is treated -with a 10% solids silica sol vat the rate of 11/2 pints per square foot per inch thickness. After dying, the product is capable of being handled without losing its shape, but has a greater resilience than the product of Example I. Equal results are obtained by brushing on the sol, or yby spraying on, or by dipping the blanket into a tray containing a mea-sured quantity of the sol.
  • the drying temperature is not critical but should be above 30 C., for instance 50 C.
  • the heat insultation material produced as .above set forth has many uses.
  • the molten metal does not penetrate the treated surface or pick up fibres and also that problems due to frequent and large temperature changes are greatly reduced since cracks in the metal-contacting surface are avoided. Further if the surface is damaged it can be readily repaired.
  • silica sol contains between 5% and 35% by weight of solids.
  • silica sol contains between 9% and 21% by weight solids.
  • a molten metal conveying channel comprising a support structure and a heat-insulating channel lining with which the molten metal is in contact, said lining being a ceramic blanket layer as claimed in claim 5 fitted in said support structure with the stiffened first portion adjacent the metal liow.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Laminated Bodies (AREA)
  • Inorganic Fibers (AREA)
US536826A 1965-03-26 1966-03-23 Fibrous insulating materials and channels lined with same Expired - Lifetime US3480125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12962/65A GB1131426A (en) 1965-03-26 1965-03-26 Improvements in or relating to fibrous insulating materials

Publications (1)

Publication Number Publication Date
US3480125A true US3480125A (en) 1969-11-25

Family

ID=10014303

Family Applications (1)

Application Number Title Priority Date Filing Date
US536826A Expired - Lifetime US3480125A (en) 1965-03-26 1966-03-23 Fibrous insulating materials and channels lined with same

Country Status (5)

Country Link
US (1) US3480125A (de)
BE (1) BE678505A (de)
DE (1) DE1646696A1 (de)
GB (1) GB1131426A (de)
NL (1) NL6603983A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932161A (en) * 1970-12-04 1976-01-13 Mcnish Thomas Gordon Fibrous insulating materials
US4002790A (en) * 1972-10-03 1977-01-11 General Electric Company Postformable laminate
US4328957A (en) * 1980-02-21 1982-05-11 Labate Michael D Prefabricated multiple density blast furnace runner
US4350325A (en) * 1981-03-18 1982-09-21 Labate M D Prefabricated multiple density blast furnace runner
US4573668A (en) * 1982-12-06 1986-03-04 Labate M D Slag and hot metal runner systems
US20200062661A1 (en) * 2017-05-17 2020-02-27 Evonik Degussa Gmbh Core-hydrophobic thermal insulation sheet having hardened surface
CN112250418A (zh) * 2020-10-22 2021-01-22 航天特种材料及工艺技术研究所 一种轻质增韧隔热复合材料构件及其制备方法和应用

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508357A1 (fr) * 1981-06-29 1982-12-31 Pont A Mousson Revetement refractaire pour dispositif d'alimentation en metal liquide d'une machine a centrifuger les tuyaux en fonte
GB8326318D0 (en) * 1983-09-30 1983-11-02 Isopad Ltd Shaped fibrous bodies
GB2175893A (en) * 1985-04-02 1986-12-10 Ae Plc Fibre-reinforced ceramic materials
NL1003885C2 (nl) * 1996-08-27 1998-03-03 Hoogovens Tech Services Goot voor een hete smelt en gootsysteem.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017318A (en) * 1962-01-16 High temperature resistant siliceous compositions
US3023141A (en) * 1955-12-30 1962-02-27 Babcock & Wilcox Co Method of forming a mineral wool pad
US3077413A (en) * 1957-02-27 1963-02-12 Carborundum Co Ceramic fiber products and method and apparatus for manufacture thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017318A (en) * 1962-01-16 High temperature resistant siliceous compositions
US3023141A (en) * 1955-12-30 1962-02-27 Babcock & Wilcox Co Method of forming a mineral wool pad
US3077413A (en) * 1957-02-27 1963-02-12 Carborundum Co Ceramic fiber products and method and apparatus for manufacture thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932161A (en) * 1970-12-04 1976-01-13 Mcnish Thomas Gordon Fibrous insulating materials
US4002790A (en) * 1972-10-03 1977-01-11 General Electric Company Postformable laminate
US4328957A (en) * 1980-02-21 1982-05-11 Labate Michael D Prefabricated multiple density blast furnace runner
US4350325A (en) * 1981-03-18 1982-09-21 Labate M D Prefabricated multiple density blast furnace runner
US4573668A (en) * 1982-12-06 1986-03-04 Labate M D Slag and hot metal runner systems
US20200062661A1 (en) * 2017-05-17 2020-02-27 Evonik Degussa Gmbh Core-hydrophobic thermal insulation sheet having hardened surface
CN112250418A (zh) * 2020-10-22 2021-01-22 航天特种材料及工艺技术研究所 一种轻质增韧隔热复合材料构件及其制备方法和应用

Also Published As

Publication number Publication date
NL6603983A (de) 1966-09-27
GB1131426A (en) 1968-10-23
BE678505A (de) 1966-09-01
DE1646696A1 (de) 1971-07-22

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