EP0078069B1 - Revêtement réfractaire pour récipients ou fours contenant du métal liquide - Google Patents

Revêtement réfractaire pour récipients ou fours contenant du métal liquide Download PDF

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Publication number
EP0078069B1
EP0078069B1 EP19820201112 EP82201112A EP0078069B1 EP 0078069 B1 EP0078069 B1 EP 0078069B1 EP 19820201112 EP19820201112 EP 19820201112 EP 82201112 A EP82201112 A EP 82201112A EP 0078069 B1 EP0078069 B1 EP 0078069B1
Authority
EP
European Patent Office
Prior art keywords
mass
lining
weight
refractory
expansion
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
EP19820201112
Other languages
German (de)
English (en)
Other versions
EP0078069A2 (fr
EP0078069A3 (en
Inventor
Peter Lamprecht
Walter Pfingstner
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.)
Veitscher Magnesitwerke AG
Original Assignee
Veitscher Magnesitwerke AG
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 Veitscher Magnesitwerke AG filed Critical Veitscher Magnesitwerke AG
Publication of EP0078069A2 publication Critical patent/EP0078069A2/fr
Publication of EP0078069A3 publication Critical patent/EP0078069A3/de
Application granted granted Critical
Publication of EP0078069B1 publication Critical patent/EP0078069B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor
    • F27B3/14—Arrangements of linings
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0023—Linings or walls comprising expansion joints or means to restrain expansion due to thermic flows

Definitions

  • the invention relates to a refractory lining for vessels and ovens with a liquid metal insert, in particular for pig iron transport vessels, such as pipe pans and torpedo pans, with an expansion space provided at least in some areas between the furnace jacket or the permanent lining and the wear lining which is laid seamlessly and a mass which is arranged under pressure and is flexible that contains granular refractory material.
  • the expansion space is created by introducing a compressible backfill material between the furnace jacket or the permanent lining and the wear lining laid without joints.
  • the object of the invention is to avoid the disadvantages mentioned and to fill the expansion space with a mass which is resistant to treading and manipulation, but is sufficiently compressible under the pressure which occurs due to the thermal expansion of the refractory bricks, namely at a pressure which is far below the Quarry limit lies, whereby an exact laying of the wear lining is to be made possible.
  • this object is achieved in that the expansion space with a compressible, hydraulically settable, water-provided backfill consisting of 4-20% by weight of expanded perlite, 15-25% by weight of alumina cement, based on the dry mass , 5-4 wt .-% plasticizers, such as cellulose ether, e.g. B. carboxymethyl cellulose, and the rest is filled to 100 wt .-% of refractory base material.
  • plasticizers such as cellulose ether, e.g. B. carboxymethyl cellulose
  • the fireproof base material of the backfill can consist of magnesite, mullite, corundum, chrome ore, sillimanite, forsterite or mixtures thereof.
  • the backfilling mass is, depending on the desired consistency, provided with a water addition of 35-45% by weight based on the dry mass.
  • Expanded perlite is used as a compressible component of the backfill.
  • Perlite is around liparite or quartz porphyry glasses of volcanic origin. When this rock with many small water inclusions is heated to over 1200 ° C, it expands by 15 to 20 times its volume to form an expanded product with microfine, largely closed pores. Expanded perlite has the following typical composition:
  • Expanded perlite is used for the purposes of the invention in a grain size of approximately 0-5 mm with a relatively small fine fraction below 0.5 mm.
  • composition (in% by weight)
  • a mass of the composition according to Example B was mixed with an addition of 40% by weight of water, based on the dry mass, and between two refractory stones of normal stone format in a layer thickness of 10 mm and under a preload of 0.2 N / mm 2 applied. After drying for 2 hours at room temperature, the mass layer in the hydraulically set state showed the following compressibility depending on the load:
  • the hydraulically set mass is compressible to about 50% at a load of 10 N / mm 2 , which corresponds approximately to the pressure caused by the stone expansion and which is far below the quarry limit, which ensures a safe expansion absorption and for every occurring in practice Pressure a very good clamping of the refractory lining are guaranteed.
  • the dry mass shows practically no changes or segregation during transport, despite the vibrations that occur, as well as during storage and stacking after filling in sacks or containers.
  • the backing of the pig iron vessel is first freed of dust and moistened. Then the backfill compound mixed with water can be applied in the entire cylindrical part of the vessel in one step in the desired thickness. This can be done similarly to the application of a plastering mortar, which is common in the construction industry, i.e. using a trowel or a plaster. It is also possible to use a gate locking machine to apply the mass. The mass adheres so well that it adheres completely overhead and does not fall off. The required uniform application thickness - depending of the expected stone expansion - can be achieved by pulling off with a slat provided with spacer nails.
  • the mass is tread-resistant about 2 hours after the application is complete, and the delivery of the wear lining made of refractory stones can then be started.
  • appropriate heat must be provided for drying or longer waiting times are required.
  • the mass can also be used as a hydraulically setting coating or plastering compound in other furnace units in which the wear lining should specifically move in the direction of the permanent or insulating lining or the sheet metal jacket of the furnace due to the laying without expansion inserts, e.g. B. in Mazieres furnaces, drum furnaces of the non-ferrous metal industry, proboscis of steel degassing plants.
  • the mass has a similar compressibility in the dry state as in the hydraulically set state, it can also be used as a dry backfilling mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Products (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Claims (3)

1. Revêtement réfractaire pour récipients ou fours contenant du métal liquide, en particulier pour récipients transporteurs de fonte brute, comme les poches tonneau ou les poches torpédo, avec un espace de dilatation placé au moins dans certaines zones entre l'enveloppe du four ou le revêtement permanent et le revêtement d'usure mis sans joints, ledit espace de dilatation étant rempli d'une masse compressible contenant une matière réfractaire granuleuse, caractérisé en ce que l'espace de dilatation est rempli d'une masse de remplissage compressible, faisant prise hydrauliquement, additionnée d'eau et, par rapport à la masse sèche, consistant en 4 à 20 % en poids de perlite expansée, en 15 à 25 % en poids de ciment alumineux fondu, en 0.5 à 4 % en poids de plastifiant et le reste à 100 % en poids de matière réfractaire.
2. Revêtement réfractaire selon la revendication 1, caractérisé en ce que la matière réfractaire de la masse de remplissage consiste en magnésie, mullite, corindon, chromite, sillimanite, forstérite ou en mélanges de ces matériaux.
3. Revêtement réfractaire selon la revendication 1, caractérisé en ce que, selon la consistance désirée, la masse de remplissage est additionnée de 35 à 45 % en poids d'eau par rapport à la masse sèche.
EP19820201112 1981-10-27 1982-09-09 Revêtement réfractaire pour récipients ou fours contenant du métal liquide Expired EP0078069B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4573/81 1981-10-27
AT0457381A AT371425B (de) 1981-10-27 1981-10-27 Feuerfeste auskleidung fuer gefaesse und oefen mit fluessigem metalleinsatz

Publications (3)

Publication Number Publication Date
EP0078069A2 EP0078069A2 (fr) 1983-05-04
EP0078069A3 EP0078069A3 (en) 1984-04-25
EP0078069B1 true EP0078069B1 (fr) 1986-04-16

Family

ID=3565683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820201112 Expired EP0078069B1 (fr) 1981-10-27 1982-09-09 Revêtement réfractaire pour récipients ou fours contenant du métal liquide

Country Status (5)

Country Link
EP (1) EP0078069B1 (fr)
JP (1) JPS5884172A (fr)
AT (1) AT371425B (fr)
DE (1) DE3270642D1 (fr)
ES (1) ES8402354A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9012677D0 (en) * 1990-06-07 1990-08-01 Foseco Int Refractory composition

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1463895A (fr) * 1965-09-28 1966-07-22 Matériaux thermo-isolants réfractaires
AT288952B (de) * 1968-12-06 1971-03-25 Veitscher Magnesitwerke Ag Feuerfeste Auskleidung mit Dehnungsausgleich und Verfahren zur Herstellung einer Isoliermasse für solche Auskleidungen
JPS5549033B2 (fr) * 1974-05-15 1980-12-09
DE2632880C2 (de) * 1975-08-04 1985-03-14 Dr. K. Ableidiger & Co, Küsnacht Organisch gebundene Isolierkörper für die Erstarrungslenkung von Metallen

Also Published As

Publication number Publication date
EP0078069A2 (fr) 1983-05-04
ES516253A0 (es) 1984-01-16
JPS6112872B2 (fr) 1986-04-10
DE3270642D1 (en) 1986-05-22
AT371425B (de) 1983-06-27
EP0078069A3 (en) 1984-04-25
JPS5884172A (ja) 1983-05-20
ES8402354A1 (es) 1984-01-16
ATA457381A (de) 1982-11-15

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