BE895245R - Coating for refractory brick in coking furnace - comprising soluble glass, non soluble glass, and zircon in aq. suspension - Google Patents

Coating for refractory brick in coking furnace - comprising soluble glass, non soluble glass, and zircon in aq. suspension

Info

Publication number
BE895245R
BE895245R BE0/209649A BE209649A BE895245R BE 895245 R BE895245 R BE 895245R BE 0/209649 A BE0/209649 A BE 0/209649A BE 209649 A BE209649 A BE 209649A BE 895245 R BE895245 R BE 895245R
Authority
BE
Belgium
Prior art keywords
soluble glass
suspension
graphite
zircon
glass
Prior art date
Application number
BE0/209649A
Other languages
French (fr)
Original Assignee
C Otto & Co G M B H Dr
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
Priority claimed from BE0/205833A external-priority patent/BE890169A/en
Priority claimed from DE19813148145 external-priority patent/DE3148145A1/en
Application filed by C Otto & Co G M B H Dr filed Critical C Otto & Co G M B H Dr
Priority to BE0/209649A priority Critical patent/BE895245R/en
Application granted granted Critical
Publication of BE895245R publication Critical patent/BE895245R/en

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
    • C04B14/00Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • 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
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26Silicates of the alkali metals
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B29/00Other details of coke ovens
    • C10B29/02Brickwork, e.g. casings, linings, walls
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B43/00Preventing or removing incrustations
    • C10B43/14Preventing incrustations

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Products (AREA)

Abstract

The parent patent describes the use of a suspension of powdered soluble glass, powdered glass and opt. a stabiliser such as hydroxyethyl cellulose in a concn. soln. of soluble glass, the soln. being applied onto the interior surfaces of the bricked walls of the chambers of coking furnaces, then dried and heat treated to form a protective coating against penetration of liq. or gaseous substances and to avoid in large measure the deposition of graphite. In this addn. the suspension further contains a cpd. including zirconium in an amt. up to 15% calcd. as ZrO2. The addn. is pref. in the form of zircon (ZrSiO4) of particle size up to 0.06 mm. The coating prevents deposition of graphite on the brick surfaces better when contg. the Zr cpd. than without it.

Description

       

  Procédé pour l'imperméabilisation et la protection de briques siliceuses et briques ainsi protégées Le brevet principal concerne l'utilisation d'une suspension de -verre soluble en poudre, de verre en poudre et éventuellement d'un stabilisant, comme par exemple de

  
 <EMI ID=1.1> 

  
verre soluble, qui est appliquée sur les surfaces de briques siliceuses, puis séchée et soumise à une cuisson pour servir de couche protectrice contre la pénétration de substances liquides ou gazeuses, ainsi que pour éviter dans une large mesure des dépôts de graphite, notamment dans des fours de cokéfaction de brai. A cet égard il est prévu d'appliquer la suspension sur les faces intérieures de parois déjà maçonnées de chambres de fours à coke. L'invention se rapporte à ce domaine d'utilisation dans lequel se sont présentées les difficultés suivantes.

  
Après l'application de la suspension sur les surfaces de parois maçonnées le temps disponible et le niveau de température étaient insuffisants pour conférer à la glaçure, avant la mise en service des fours, la résistance mécanique nécessaire correspondant à celle obtenue lorsque la glaçure de briques traitées est soumise à une cuis-

  
 <EMI ID=2.1> 

  
moment de pousser le premier coke les parois traitées avec la glaçure présentaient des rainures horizontales. C'est seulement au bout d'une durée de fonctionnement de plusieurs semaines à une température d'environ 1100"C que la glaçure était suffisamment solidifiée par absorption de

  
 <EMI ID=3.1> 

  
laps de temps on observait la formation d'un dépôt de graphite. C'est seulement après la combustion du graphite que les parois présentaient un comportement aussi favorable que celui de parois construites à partir de briques ayant été soumises après l'application de la suspension à un trai-

  
 <EMI ID=4.1> 

  
La présente invention a pour objet d'indiquer une composition pour une suspension ou glaçure qui peut être appliquée sur des parois déjà maçonnées de chambres de fours à coke et présente avant de pousser le premier coke déjà une résistance mécanique. suffisante et dont l'utilisation permet d'éviter dès le départ la formation de dépôts de graphite.

  
De manière surprenante ceci s'avère réalisable lorsque la s uspension contient un composé renfermant du zirco-

  
 <EMI ID=5.1> 

  
est avantageusement constitué par du silicate de zirconium
(ZrSi04). L'invention prévoit en outre que la grosseur de grain du composé renfermant du zirconium est au maximum de 0,06 mm.

  
 <EMI ID=6.1> 

  
Un mélange de 11,75 kg de solution concentrée de verre soluble, 8,75 kg de verre en poudre, 4,5 k de zircon en grains présentant une grosseur de grain inférieure à 60 microns ainsi que 0,04 kg d'hydroxyéthylcellulose est homogénéisé dans un récipient au moyen d'un mélangeur rotatif à vitesse élevée et est appliqué sur deux surfaces de paroi opposées d'une chambre nouvellement maçonnée de four à coke d'une cokerie à brai, les surfaces des parois ayant été préalablement enduites d'une solution de verre soluble servant de couche de fond.

  
Une partie de l'une des surfacesde paroi est traitée avec une suspension de verre soluble en poudre et de verre en poudre suivant le brevet principal.

  
Après une durée de fonctionnement de quelques semaines les surfaces traitées diversement diffèrent nettement entre elles. Alors que les surfaces de paroi traitées avec la suspension renfermant du zirconium suivant la présente invention sont pratiquement exemptes de dépôts de graphite, la surface de paroi traitée avec la glaçure ne renfermant pas de zirconium présente une couche de graphite d'une épaisseur de 2 à 3 cm. C'est seulement au bout d'une utilisation du four durant plusieurs semaines additionnelles que cette surface de paroi devient également exempte de graphite.

   Il s'avère en outre que les surfaces de paroi traitées avec la suspension suivant la présente invention sont dépourvues de rainures lorsque le premier coke a été poussé et que, fait remarquable, il ne se produit plus, comme c'était auparavant inévitablement le cas, de dépôt de graphite sous l'ouverture de remplissage.

  
Au cours du fonctionnement ultérieur le four traité suivant l'invention se distingue par rapport à des fours

  
 <EMI ID=7.1> 

  
moment de pousser le coke. 

REVENDICATIONS

  
1 - Utilisation d'une suspension de verre soluble en poudre, de verre en poudre et éventuellement d'un stabilisant, comme par exemple de l'hydroxyéthylcellulose, dans une solution concentrée de verre soluble, qui est appliquée sur les faces intérieures de parois déjà maçonnées de chambres de fours à coke,' puis séchée et soumise à une cuisson pour servir de couche protectrice contre la pénétration de substances liquides ou gazeuses, ainsi que pour éviter dans une large mesure des dépôts de graphite, selon le brevet principal, caractérisée en ce que la suspension contient un c omposé renfermant du zirconium, la dose du composé pouvant aller jusqu'à 15 %, calculés en tant que

  
 <EMI ID=8.1> 

  
2 - Utilisation d'une suspension selon la revendication 1, caractérisée en ce que le composé renfermant du zirconium est constitué par du silicate de zirconium
(ZrSiOj.



  Process for waterproofing and protecting siliceous bricks and bricks thus protected The main patent relates to the use of a suspension of soluble glass powder, glass powder and possibly a stabilizer, such as for example

  
 <EMI ID = 1.1>

  
soluble glass, which is applied to the surfaces of siliceous bricks, then dried and baked to serve as a protective layer against the penetration of liquid or gaseous substances, as well as to avoid to a large extent deposits of graphite, in particular in pitch coking ovens. In this regard, it is planned to apply the suspension to the interior faces of already masonry walls of coke oven chambers. The invention relates to this field of use in which the following difficulties have arisen.

  
After the suspension was applied to the surfaces of masonry walls, the time available and the temperature level were insufficient to give the glaze, before the ovens were put into service, the necessary mechanical resistance corresponding to that obtained when the brick glaze processed is subject to cooking

  
 <EMI ID = 2.1>

  
when pushing the first coke the walls treated with the glaze had horizontal grooves. It was only after operating for several weeks at a temperature of about 1100 "C that the glaze was sufficiently solidified by absorption of

  
 <EMI ID = 3.1>

  
time was observed the formation of a graphite deposit. It was only after the combustion of graphite that the walls exhibited a behavior as favorable as that of walls constructed from bricks having been subjected after the application of the suspension to a treatment.

  
 <EMI ID = 4.1>

  
The object of the present invention is to indicate a composition for a suspension or glaze which can be applied to already masonry walls of coke oven chambers and has mechanical strength before pushing the first coke. sufficient and whose use prevents the formation of graphite deposits from the start.

  
Surprisingly, this proves to be feasible when the suspension contains a compound containing zirconia.

  
 <EMI ID = 5.1>

  
advantageously consists of zirconium silicate
(ZrSi04). The invention further provides that the grain size of the zirconium-containing compound is at most 0.06 mm.

  
 <EMI ID = 6.1>

  
A mixture of 11.75 kg of concentrated solution of soluble glass, 8.75 kg of powdered glass, 4.5 k of zirconia in grains having a grain size of less than 60 microns as well as 0.04 kg of hydroxyethylcellulose is homogenized in a container by means of a rotary mixer at high speed and is applied to two opposite wall surfaces of a newly built coke oven chamber of a pitch coking plant, the wall surfaces having been previously coated with a solution of soluble glass serving as a base layer.

  
Part of one of the wall surfaces is treated with a suspension of powdered glass and powdered glass according to the main patent.

  
After a period of operation of a few weeks, the surfaces treated differently differ markedly from one another. While the wall surfaces treated with the zirconium-containing suspension according to the present invention are practically free of graphite deposits, the wall surface treated with the non-zirconium-containing glaze has a layer of graphite with a thickness of 2 to 3 cm. It is only after using the oven for several additional weeks that this wall surface also becomes free of graphite.

   It also turns out that the wall surfaces treated with the suspension according to the present invention are devoid of grooves when the first coke has been pushed and that, remarkably, it no longer occurs, as was inevitably the case before. , graphite deposit under the filling opening.

  
During subsequent operation, the oven treated according to the invention is distinguished from ovens.

  
 <EMI ID = 7.1>

  
time to push the coke.

CLAIMS

  
1 - Use of a suspension of soluble powdered glass, powdered glass and possibly a stabilizer, such as hydroxyethylcellulose, in a concentrated solution of soluble glass, which is applied to the interior faces of walls already built from coke oven chambers, 'then dried and baked to serve as a protective layer against the penetration of liquid or gaseous substances, as well as to avoid to a large extent deposits of graphite, according to the main patent, characterized in that the suspension contains an omitted component containing zirconium, the dose of the compound being able to go up to 15%, calculated as

  
 <EMI ID = 8.1>

  
2 - Use of a suspension according to claim 1, characterized in that the compound containing zirconium consists of zirconium silicate
(ZrSiOj.


    

Claims (1)

3 - Suspension selon la revendication 1 ou 2, caractérisée en ce que la grosseur de grain du composé renfermant du zirconium est au maximum de 0,06 mm. 3 - Suspension according to claim 1 or 2, characterized in that the grain size of the compound containing zirconium is at most 0.06 mm.
BE0/209649A 1981-09-01 1982-12-03 Coating for refractory brick in coking furnace - comprising soluble glass, non soluble glass, and zircon in aq. suspension BE895245R (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE0/209649A BE895245R (en) 1981-09-01 1982-12-03 Coating for refractory brick in coking furnace - comprising soluble glass, non soluble glass, and zircon in aq. suspension

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE0/205833A BE890169A (en) 1980-09-02 1981-09-01 PROCESS FOR WATERPROOFING AND PROTECTION OF SILICOUS BRICKS AND BRIDGES THUS PROTECTED
DE19813148145 DE3148145A1 (en) 1981-12-05 1981-12-05 Coating composition for the insides of the chamber walls of coke ovens
BE0/209649A BE895245R (en) 1981-09-01 1982-12-03 Coating for refractory brick in coking furnace - comprising soluble glass, non soluble glass, and zircon in aq. suspension

Publications (1)

Publication Number Publication Date
BE895245R true BE895245R (en) 1983-03-31

Family

ID=27158720

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/209649A BE895245R (en) 1981-09-01 1982-12-03 Coating for refractory brick in coking furnace - comprising soluble glass, non soluble glass, and zircon in aq. suspension

Country Status (1)

Country Link
BE (1) BE895245R (en)

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: DR. C. OTTO & CO. G.M.B.H.

Effective date: 19870930