CA1079753A - Process for repairing basic refractory linings - Google Patents

Process for repairing basic refractory linings

Info

Publication number
CA1079753A
CA1079753A CA286,595A CA286595A CA1079753A CA 1079753 A CA1079753 A CA 1079753A CA 286595 A CA286595 A CA 286595A CA 1079753 A CA1079753 A CA 1079753A
Authority
CA
Canada
Prior art keywords
mixture
per cent
weight per
total solids
solids content
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
Application number
CA286,595A
Other languages
French (fr)
Inventor
John Damiano
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.)
Quigley Co Inc
Original Assignee
Quigley Co Inc
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 Quigley Co Inc filed Critical Quigley Co Inc
Application granted granted Critical
Publication of CA1079753A publication Critical patent/CA1079753A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303Inorganic additives
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/20Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in magnesium oxide, e.g. forsterite
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/44Refractory linings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/16Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1636Repairing linings by projecting or spraying refractory materials on the lining
    • F27D1/1642Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034Physico-chemical characteristics of the mixtures
    • C04B2111/00146Sprayable or pumpable mixtures
    • C04B2111/00155Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482Coating or impregnation materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/72Repairing or restoring existing buildings or building materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206Magnesium oxides or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427Silicates other than clay, e.g. water glass
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9669Resistance against chemicals, e.g. against molten glass or molten salts
    • C04B2235/9676Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Products (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

ABSTRACT OF THE DISCLOSURE

An improved process for repairing and prolonging the life of basic refractory linings of metallurgical vessels which comprises using a gunning mix consisting essentially of olivine in combination with up to about 15 weight per cent of dead-burn-ed magnesia based on the total solids content. A plasticizing clay or a water-soluble binder, each in amounts up to about 10 weight per cent based on the total solids content, may be included if desired.

Description

1~79753 This invention relates to an improved process for re-pairing and prolonging the useful life of basic refractory linings of metallurgical vessels.
Basic refractory linings, usualLy constructed of magnesia, dolomite or chrome-magnesia, are employed in metallurgical vessels such as ~teelmaking furnaces like ~he basic oxygen ~urnace and electric arc ~urnace. ~t is well known that ~hese refractory linlngs, although constructed o~ material having high temperature ~tability and resistance to attack by basic slags are nonetheless subject to erosion and wear by exposure to the high temperatures and basic slags present in the steelmaking operation. Efforts to prolong the life of these basic refractory linings and to repair cracks or other defects resulting from operation have primarily consisted of applying a particulate refractory material to the lS surface o~ the lining and building up a coating or deposit thereon.
Most commonly the particulate r~ractory material is applied by the gunning technique which consists of conveying the particulate refractory material in a stream of air to a nozzle where it is mixed with water and the resulting mixture is pneumatically pro- -pelled onto the refractory lining to form a coating or patch.
Alternatively, the particulate refractory material can be premixed with water and thereafter conveyed to the nozzle and applied as previously described.
The particulate refractory materials used in the prior art in gunning mixes for the purposes described above have been
-2- ~

.. .. ... ..
: .

J 0~9753 based on magnesia, chrome-ore and dolomite. These materials have been chosen for the same reasons that they are used as materials of construction of the refractory linings themselves, that i5 high temperature stability and slag resistance. These materials suffer from some disadvantages, particularly that they are relatively expensive in view of the large volumes of mzlterial employed, and they exhibit a tendency to hydrate. This latter problem leads to cracking and structural failure of the deposited coating, parti-cularly when applied to cold furnace linings, and limits the utility of these materials.
United States Patent No. 3,201,501 provides for an asbestos-filled gunning mix based on magnesia or chrome-ore but wherein materials such as forsterite or olivine can be substituted or up to about 35 weight per cent of the magnesia or chrome-ore content. However, there i9 no suggestion therein that gunning mixes which are based on olivine or related materials such as forsterite as the ma~or component are desirable or would have properties suitable for applications in the repair and malnten-ance of refractory linings exposed to the extreme conditions of steelmaking operations. In fact, the prior art considered as a whole teaches to the contrary. Thus, brick employing olivine, u~ually in the form of forsterite formed by firing mlxtures of olivine and magnesia, has been limited to use in the lower tempera-ture parts of furnaces and is not used in applications where ex-posure to basic slags is required. This is considered to beprimarily due to the lack of slag resistance and to the lowering of refractoriness of the forsterite phase by the presence of other oxides, particularly iron oxides, at temperatures above 1650C.
See J.H. Che~ter3, ~Refractories Production and Properties", The Iron and Steel Institute, London, 1973. Olivine has also been
-3-~079753 used to form foundry casting molds and as a ladle lining product.
Olivine is also used in steelmaking operations as a flux-ing agent, such use of necessity requiring the olivine to dissolve in the molten slag. A commercial material for this use is marketed by International Minerals and Chemicals Corporation under the Registered Trademark "Oliflux".
There is a need to provide an improved process for re-pairing and prolonging the life of basic refractory linings of metallurgical vessels by use of a gunning mix based on more economical raw materials.
It is a further need to provide a process for xepairing and prolonging the lie of basio re~ractory linlngs by use of a gunning mix which while providing economy of raw materials and improved hydration resistance has durability, tempera~ure stability and slag resistance comparable to the prior art gunning mixes.
According to the present invention there is p~ovided an improved process for repairing and prolonging the life of basic - refractory linings which comprises gunning a particulate refractory material in water on to at least a part of said lin1ng and drying the resulting deposit, said refractory material consisting essen-tially of olivine which may optionally contain up to about 15 weight per cent dead-burned magnesia based on the total 801~ ds content of the mixture. Further, the mixture may optional~y con-tain a plasticizing clay in an amount up to about 10 weight per cent of the total solids content, and/or a water soluble binder in an amount up to about 10 weight per cent of the total solids content. The materials are mixed with water and gunned onto the surface of the basic refractory linings using equipment and techniques known in the art. The improved process provides signifi-cant economy of raw materials while giving good durability,
-4-~' 1 ' '' ~07~753 temperature stability ! slag resistance and improved hydration resistance.
In contrast to the results expected by consideration of the prior art and previous uses of olivine it has unexpectedly been found that gunning mixes based on a particulate refractory material consisting essentially of olivine can be used as a maintenance and repair material for basic refractory linings in steelmaking applications. The deposited coatir.g resulting from the use of the present process shows durability, temperature stability and slag resistance comparable to the magnesia and dolomite based mixes and offers the advantages of economy of raw materials and better hydration resistance.
Olivine is an abundant na~urally occuring miner~l con-sisting of a mixture o~ magnesium orthosilicate, or forsterite, and ferrous orthosilicate, or fayalite. The forsterite and fayalite content of the olivine can vary in the naturally occur-ing minerals over the range of about 70% to about 95% by weight as the forcterite phase. The olivine can also contain from about 2 to about 15 weight per cent of impurities, mainly in the form of enstatite, magnetite, talc and small amounts of other materials.
These impurities are no~ detrimental to the pre~ent proce3s and in this description the term olivine is intended to include all natural and synthetic minerals classified as olivine, i.eO ~ those being predominantly mixtures of forsterite and fayalite. Where reference is made to percentages of materials in the gunning mixes the weight of olivine is to be taken as the total weight of the mineral material including impurities.
The particle size distribution of the olivine is not critical to the invention and the variation of this parameter to conform to the needs of the particular application and to impart
-5-~0797~3 suitable handling characteristics to the gunning mix is known to those skilled in the art. Generally, however, the particLe size is 3 mesh United States sieve size or smaller. The olivine may for example contain a fraction having a particle siæe between 3 and 16 mesh United Sta~es sieve size and a second fraction smaller than 16 mesh.
While gunning mixes based on olivine alone can be used in accordance with the present inventio~ it ~s preferred to use olivine in combination with up to about 15 weight per cent of dead-burned magnesia based on the total solids content of the mixture. Most preferably, from about 5 to 10 weight per cent of dead-burned magne~ia is added to the ollvine in a suitably sized ~orm. By dead-burned magnesia i8 meant magnesia tha~ has been ~ormed by heating the hydroxide, carbonate or other salt to high temperature, u~uaLly in excess of 1700~C., such that the material is essentially magne~ium oxide in the periclase form. The parti-cle size is not criticai, but the dead-burned magnesia will not normally be present in a particle size larger than that of the olivine component of the gunning mix, and prefeLabLy is inc~ded as a pulverized form where~n at least about 50% of the material will pass through a 325 mesh United States sieve. When the gunning mix contains no added magnesia, up ~o about lS weight per cent of the olivine i~ preferably ;ncluded as such a p~lve~ized form.
While not necessary for the sa~isfactory performance of the gunning mixes of the present invention, other modifying mate-rials can be added. Thus, a plasticizing clay can be added in an amount up to about 10 weight per cent based on the total solids ; content of the mixture, preferably in an amount from about 1.0 to about 7.5 weight per cent. The clay acts to improve the process-
-6-, ability of the gunning m x and tO impro-.e adherence of the result-ing deposited coating to the refractory lining sub trate. Suit-able clays for this purpose are well known in the art and are readily available commercially. These include but are not limited S ~o such materials as bentonite, ball clay and mixture~ thereof.
It is also desirable but not essential to include a binder in the gunning mix composition such tha~ the adherence to the refractory lining substrate and the structural integrity of the deposited coating are enhanced. Th~ b~nder employed can be any which is compatible w~th the other materials in the composition but is preferably a water-soluble binder such as, but not limited to, alkaLi metal silicAtes, phosphates, chromates and borates as well as chromlc acid and boric acid, or mixt~res of th~se materials.
Pxeferred b~nder~ are ~od1um silicate, phosph~te, chromate and borate. The water-soluble blnder can be added in an amount up to about 10 weight per cent based on the total sol-ds cont~nt but is preferably added ir. an amount be~ween about 1 and S weight per oent based on the total solids contentO
The gunniny mixes of the present invention can be applied to the refractory linings of the steel furnace when the linings are either hot or cold. The practice ~n the industry is to app1y the mixes while the furnace i9 still hot to m~nimi~e down tim~ between heats. However, the improved stability to hydration of the ol vine based gunning mixe~ of the present nverltion compared tO prior magnesia and particularly dolomite based mixtures allows appllca~
tion to cold walls. When applied to hot lining~ the coa~lrlg is self-drying due to residual heat, but when applied to cold walls it is necessary to dry the coating by heating the furnace or al~owing a period for air drying.
The novel gunning mixes of the presenk invention are
-7-. .

~79~S3 applied to the basic refractory lining of the steel furnace using gunning equipment conventional to the industry~ The dry gunning mix is either mixed with water or another ~uitable liquid at the nozzle of the gunning apparatus or i~ premixed with water to form a slurry and thereafter gunned onto the lining. The amount of water to be used in the resulting mixture that is gunned onto the lining should be sufficient to form a gunnable mixture which can be easily applied to the refractory linir.g but w'nich will be thick enough to adhere to that lining without flowing or slumping. The amount of water to be added is a variable understood by those skilled in the art and such persons will be able to use amounts of water to give gunning mixes appropriate for the particular application. Generally however, the water con~ent will be between about 10 and 20 weight per cent o~ the mixture applicd to the refractory lining.
In evaluating the performance of gunning mixes lt has been found advisable to conduct field tests in steelmaking furnaces since laboratory te~ts to determine s$ag resistance and other properties do not correlate well with actual field performance.
The rea30ns for this are not fully understood but it is considered that the environment o~ the steelmaking furnace and the condition o~ the basic refractory linlng after expo~ure to steelmaking opera-tions may contribute to affect the physical or chemical nature of the gunned deposited coating in a manner advantageous to its per-; 25 formance.
The present invention is il7ustra~ed by the following examples. It should be understood, however, that the invention i~ not limited to the specific details of these examples.
EXAMPLE_I
An olivine based gunning mix was prepared by intimately 107~37S3 mixing the following materials:
W~
Olivine, (-7 +16 mesh) 44.0 Olivine, (-16 mesh) 38.0 Dead-burned magnesia, pulverized (60 to 80% -325 mesh) 10.0 Ball Clay, Air Floated 5.0 Sodium Silicate, Powder ~.5 Sodium ~orate, Anhydrous Granular 0O5 The resulting gunning mix was gunned onto the high magnesia brick refractory llning of an Electric Arc Furnace used for steelmaking, the lining being at red-heat at the time of gunning. Application was made alongside a magnesia ba~ed gunning mix ~84~ magnesia) conventlonal to the industry for comparative purposes. ~Eter the next heat in making a degasser-ca~ter grade ~teel, where the tap temperature was about 1675~., the ollvine based deposit wae inspected and compared to the conventional magnesia based materlal. This inspection showed the olivine based material had durability, temperature stability and slag re-0 si~tance comparable to the conventional magnesia mix.EXAMPLE II
The gunning mlx de~cribed in Example I above was gunned into a hole in the magnesia brick ~ining of a Basic Oxygen Furnace and used to coat khe trun~ons. After eight hea~ inspection show-ed that the material remained in the hole and showed good durability,temperature stability and slag resistance~
EXAMPLE III
An olivine based gunning mlx was prepared by intimately mixing the following materials:

_g_ ~

: .
~.

~ .
.. ' .. . .. .~ . ...

~ILai7~753 w~. %
Olivine (-3 mesh, 30% t7 mesh, less than 15% -40 mesh) 89.5 Magnesia, pulverized (60 to 80% -325 mesh) 6.0 Ball Clay, Air Floated 2.0 Sodium Silicate, Powder 2.5 EXAMPLE IV
An olivine based gunning mix can be prepared by intimate-ly mixing the following m~terials:
Wt.
Olivine, (-3 mesh, 30~ +7 mesh;
less than 15% -40 mesh) 89.5 Olivine, pulverized t60 to 80~ -325 mesh) 6.0 Ball Clay, Air Floated 2.0 Sodium Silicate, Powder 2.5 EXAMPLE V
An oiiv.ne based gunning m~x can be prepared by intlmate-ly mixing the foliowing materials:
W~. %
Olivine, (-3 mesh, 30% +7 mesh, less than 15% -40 mesh) 84.0 Olivine, pulverized t60 to 80~ -325 me~h, 10.0 Sodium Sil1cate, Powder 6.0 .

Claims (9)

The embodiments of the invention in which an ex-cluxive property or privilege is claimed are defined as follows:
1. A process for repairing and prolonging the life of basic refractory linings of metallurgical vessels which com-prises gunning a particulate refactory material in water onto at least a part of said lining and drying the result-in deposit, characterized by using as said particulate refractory material a mixture consisting essentially of olivine optionally in combination with 0 to 15 weight per cent of dead-burned magnesia based on the total solids content of siad mixture.
2. A process according to claim 1, characterized in that said mixture contains from 5 to 10 weight per cent of dead-burned magnesia based on the total solids content of said mixture.
3. A process according to claim 1, characterized in that said mixture contains up to about 10 weight per cent of a plasticizing clay based on the total solids content of said mixture.
4. A process according to any one of claims 1, 2 and 3, characterized in that said mixture contains up to about 10 weight per cent of a water-soluble binder based on the total solids content of said mixture.
5. A process according to any one of claims 1, 2 and 3, characterized in that siad mixture contains up to about 10 weight per cent based on the total solids content of said mixture of a water-soluble binder selected from the group consisting of sodium silicate, sodium phosphate, sodium chromate and sodium borate.
6. A process according to any one of claims 1, 2 and 3, characterized in that said mixture contains from 5 to 10 weight per cent dead-burned magnesia, 1.0 to 7.5 weight per cent of plasticizing clay and 1 to 5 weight per cent of a water-soluble binder based on the total solids content of said mixture.
7. A process according to any one of claims 1, 2 and 3, wherein said mixture contains from 5 to 10 weight per cent of dead-burned magnesia, 1.0 to 705 weight per cent of a plasticizing clay and 1 to 5 weight per cent of a water-soluble binder selected from sodium silicate phophate, sodium chromate and sodium borate based on the total solids content of said mixture.
8. A process according to claim 2, characterized in that said mixture contains up to about 10% by weight of a plasticizing clay based on the total solids content of said mixture.
9. A process according to either of claims 2 and 8, characterized in that said mixture contains up to about 10%
by weight of a water-soluble binder based on the total solids content of said mixture,
CA286,595A 1976-09-27 1977-09-13 Process for repairing basic refractory linings Expired CA1079753A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72690076A 1976-09-27 1976-09-27

Publications (1)

Publication Number Publication Date
CA1079753A true CA1079753A (en) 1980-06-17

Family

ID=24920502

Family Applications (1)

Application Number Title Priority Date Filing Date
CA286,595A Expired CA1079753A (en) 1976-09-27 1977-09-13 Process for repairing basic refractory linings

Country Status (10)

Country Link
JP (1) JPS5342211A (en)
BE (1) BE859043A (en)
BR (1) BR7706269A (en)
CA (1) CA1079753A (en)
DE (1) DE2743374C2 (en)
FR (1) FR2365768A1 (en)
GB (1) GB1565118A (en)
IT (1) IT1086497B (en)
NL (1) NL7710113A (en)
SE (1) SE430883B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042897B1 (en) * 1980-07-02 1984-08-29 Aikoh Co. Ltd. Method of making the lining of a vessel for molten metal and lining so made
JPS60157052U (en) * 1984-03-26 1985-10-19 本田技研工業株式会社 die casting machine injection device
JPS60216961A (en) * 1984-04-12 1985-10-30 Toshiba Mach Co Ltd Die casting device
US5073525A (en) * 1989-10-23 1991-12-17 Quigley Company, Inc. Lightweight tundish refractory composition
NO172153C (en) * 1989-12-22 1993-06-09 Icelandic Alloys Ltd ILDFAST COATING COMPOSITION IN THE FORM OF A FORMAT OR SPRAY MASS FOR PROTECTION OF LINES IN METAL SURGICAL MOLDS, TAPES AND CASTLE OILS, RUNS AND TAPPETS
US5512316A (en) * 1994-04-11 1996-04-30 Minerals Technologies, Inc. Method of protecting ladle linings
JP4273099B2 (en) * 2005-07-29 2009-06-03 黒崎播磨株式会社 Spraying material for repairing electric furnace lining for steelmaking and method for repairing spraying of electric furnace lining for steelmaking using the same
CN111960806B (en) * 2020-08-18 2022-06-28 武汉钢铁集团耐火材料有限责任公司 Rebound material recycling method of RH dip pipe gunning material

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE605371C (en) * 1926-07-07 1934-11-09 Dr Victor Moritz Goldschmidt Process for making refractory products
DE650717C (en) * 1927-11-20 1937-09-30 Victor Moritz Goldschmidt Dr Process for the manufacture of refractory products
FR790877A (en) * 1934-07-13 1935-11-28 Process for the preparation of refractory products from natural products rich in magnesium orthosilicate, and in particular from olivine rocks
FR791242A (en) * 1934-11-24 1935-12-06 Refractory building materials, and in particular mortar
FR811237A (en) * 1936-02-20 1937-04-09 Ceramic material
CH200601A (en) * 1936-02-20 1938-10-31 Goldschmidt Viktor Moritz Prof Ceramic building material.
GB587870A (en) * 1945-01-24 1947-05-07 Victor Moritz Goldschmidt Improvements in or relating to furnaces for the heating of solid metals
US3201501A (en) * 1963-05-28 1965-08-17 Harbison Walker Refractories Method of in situ fabrication of a monolith refractory lining
AT274872B (en) * 1967-08-04 1969-10-10 Veitscher Magnesitwerke Ag Process for building up or repairing refractory linings or lining bodies

Also Published As

Publication number Publication date
DE2743374C2 (en) 1983-10-20
BR7706269A (en) 1978-07-04
AU2907577A (en) 1978-09-28
GB1565118A (en) 1980-04-16
FR2365768B1 (en) 1983-08-19
JPS5737557B2 (en) 1982-08-10
JPS5342211A (en) 1978-04-17
NL7710113A (en) 1978-03-29
IT1086497B (en) 1985-05-28
DE2743374A1 (en) 1978-03-30
FR2365768A1 (en) 1978-04-21
SE7709752L (en) 1978-03-28
BE859043A (en) 1978-03-28
SE430883B (en) 1983-12-19

Similar Documents

Publication Publication Date Title
US4061501A (en) Refractory linings
US4039344A (en) Alumina-chrome refractory composition
KR20150118969A (en) Geopolymer-binder system for fire concretes, dry fire concrete mix containing the binder system, and also the use of the mix
WO1993017984A1 (en) Sprayable refractory composition
US5559064A (en) Chrome-free brick
CA1286438C (en) Granular, plastic, carbon containing, refractory composition
US20230312418A1 (en) Dry material mixture for a backfill, preferably a refractory concrete backfill, for producing a heavy-clay refractory non-basic product, refractory concrete backfill and such a product, method for producing same, lining, and industrial furnace, channel transport system or mobile transport vessel
CN111040478B (en) Non-oxide slag adhesion-resistant coating, preparation method and application thereof, and high-temperature-resistant coating
CA1079753A (en) Process for repairing basic refractory linings
US4168177A (en) Refractory gunning composition
US3257217A (en) Refractory
CA2013863C (en) Sprayable insulating liner compositions for metal vessels
CA1192230A (en) Magnesia refractories bonded with sulfamic acid
US3540897A (en) Gunnable refractory
US5968602A (en) Cement-free refractory castable system for wet process pumping/spraying
CA1078106A (en) Refractory material suitable in particular for the production and handling of aluminium
EP0020022B1 (en) Plastic refractories with fused alumina-chrome grog
US3303032A (en) Magnesia-zircon refractories
US4999325A (en) Rebonded fused brick
JP5324092B2 (en) High resistance refractory composition
CA1055053A (en) Monolithic refractories
US20140322442A1 (en) Calcium enriched refractory material by the addition of calcium carbonate
Routschka Refractory Materials: Pocket Manual; Design, Properties, Testing
JPS6395175A (en) Lightweight heat insulating tandish coating material
CN115872729B (en) Repair material for working layer of torpedo tank

Legal Events

Date Code Title Description
MKEX Expiry