EP0076577B1 - Rinne für Metallschmelzen - Google Patents

Rinne für Metallschmelzen Download PDF

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Publication number
EP0076577B1
EP0076577B1 EP82304772A EP82304772A EP0076577B1 EP 0076577 B1 EP0076577 B1 EP 0076577B1 EP 82304772 A EP82304772 A EP 82304772A EP 82304772 A EP82304772 A EP 82304772A EP 0076577 B1 EP0076577 B1 EP 0076577B1
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EP
European Patent Office
Prior art keywords
lining
ferrous metal
transfer channel
metal transfer
weight
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
EP82304772A
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English (en)
French (fr)
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EP0076577A1 (de
Inventor
Michael Robert Clark
David William Martin
Robert Stephen Haselgrove
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Foseco Trading AG
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Foseco Trading AG
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Publication date
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Priority to AT82304772T priority Critical patent/ATE19657T1/de
Publication of EP0076577A1 publication Critical patent/EP0076577A1/de
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Publication of EP0076577B1 publication Critical patent/EP0076577B1/de
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/04—Blast furnaces with special refractories
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/14—Discharging devices, e.g. for slag
    • 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
    • F27D1/14—Supports for linings
    • F27D1/141—Anchors 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away 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
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • 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
    • F27D2001/0046—Means to facilitate repair or replacement or prevent quick wearing
    • F27D2001/005—Removable part or structure with replaceable elements

Definitions

  • This invention relates to channels for transferring molten ferrous metal from one vessel e.g. a furnace to another e.g. a ladle.
  • Such channels are particularly useful for transferring molten iron away from blast furnaces and cupolas, these channels sometimes being termed blast furnace troughs and cupola runners respectively and for transferring molten steel away from electric arc furnaces, in this case the channel sometimes being termed a launder or spout. It is known to provide such channels within a refractory support or metal casing.
  • molten metal transfer channels in accordance with this invention does not include tundishes.
  • the channels leading from a blast furnace to e.g. a torpedo ladle are generally sited in the cast house floor and are lined with one or more layers of permanent refractory brick and/or cast refractory cement together with one or more safety linings, located behind the metal contacting lining.
  • Such lined channels are capable of withstanding the flow of up to 4000 tonnes per day according to the output of the blast furnace for up to 28 days or more.
  • the working, molten ferrous metal contacting layer of refractory material may be patched from time to time during this period, e.g. by gunning or the like. However, it is uneconomic in terms of material cost and application time to replace the entire lining at shorter intervals.
  • Analogous economic considerations also apply to the launder of an electric are furnace and a cupola runner but in these cases it is customary to replace the permanent refractory lining after approximately 7 to 14 days use.
  • the lining is inspected e.g. daily and repaired as required.
  • the dense, highly refractory materials used although having the advantage of being long lasting have the disadvantage that they provide little or no heat insulation for the metal flowing therethrough which in the case of a blast furnace distribution trough may be the relatively long distance of 50 metres or more. Accordingly, chilling of the metal occurs with the risk of premature freezing with concomitant risk of damming of the metal with spillage onto the case house floor which is both dangerous and inconvenient for the blast furnace operators.
  • a molten ferrous metal transfer channel has an outer, permanent refractory lining, or a metal casting, or both, and an inner replaceable lining (as hereinafter defined) of refractory, heat-insulating material comprising at least 75% by weight of particulate refractory material and an inorganic binder and/or an organic binder, and having a density in the range from 1.3 g ⁇ cm- 3 to 2.2 g ⁇ cm- 3 , the inner replaceable lining being reusable for a plurality of molten ferrous metal transfers.
  • the inner replaceable lining is defined as one which may be in the form of a number of slabs which may be flat or otherwise or it may be in the form of one or more preformed, self-supporting channel sections having a generally U-shaped cross-section.
  • a pre-formed, self-supporting molten ferrous metal transfer channel lining section of refractory heat-insulating material having a generally U-shaped cross-section comprising at least 75% by weight of particulate refractory material, and an inorganic binder and/ or an organic binder, and having a density in the range from 1.3 g. cm- 3 to 2.2 g . cm- 3 .
  • the feature wherein the inner replaceable lining may be used for a plurality of molten ferrous metal transfers is a significant and remarkably advantageous property especially having regard for the thermal cycling that the lining undergoes between each reuse. From a cold (ambient) temperature the lining is immediately subjected to temperatures in the range of 1400°C to 1700°C, allowed to cool, sometimes to ambient temperature, and resubjected to high temperatures stated above. This process is repeated for each reuse.
  • the consequent thermal shock and thermal degradation i.e. the contact with molten metal for periods of from several minutes to an hour or more, is a severe test of endurance especially as the metal and accompanying slag are mobile.
  • the ability to withstand such conditions of use provides the blast furnace iron producer and arc furnace steel maker with a valuable contribution to increase this productivity, and reduce his material and energy costs.
  • replaceable linings which it has been suggested might be used for the transfer of molten iron from a blast furnace but which would be capable of only one molten ferrous metal transfer before replacement of the channel lining was required.
  • the loss of heat from molten metal in contact with the lining is reduced as compared with the case where the channel merely has a conventional lining of refractory material, cast refractory cement or refractory bricks, sometimes with an overlying layer of refractory cement, all of which typically have poor heat-insulating properties and in some cases are highly conductive.
  • the loss of heat from the molten metal is often such that the lining has to be pre-heated before the channel is used, although sufficient heat may be retained that pre-heating is not necessary again before the channel is used on the next occasion, whereas pre-heating can be avoided in the case of channels of the invention.
  • the channels are commonly large, avoidance of pre-heating saves a considerable amount of energy and also saves the considerable time required for pre-heating.
  • the inner lining of the invention is refractory as well as heat-insulating and is well able to resist the high temperatures of molten metal in contact with it and the erosive effect of the metal and any accompanying slag.
  • the inner lining is such that it can satisfactorily survive use of the channel for a plurality of molten ferrous metal transfer cycles.
  • the inner lining is replaceable i.e. when, after a number of uses it is judged to be unsuitable for further use, it can readily be removed without damage to the permanent lining and a new inner lining provided in its place. In order that the used inner lining may be more easily removed a layer of unbonded sand or the like may be provided as a parting layer between the permanent lining and the inner lining.
  • the outer permanent lining may be of refractory brick and/or cast refractory cement and provides a refractory support for the inner lining and may also serve as a safety lining.
  • the inner lining protects the permanent lining and, whilst the permanent lining requires occasional repair or renewal, the permanent lining lasts over the lifetime of a number of the reusable inner linings. In the case of conventional linings for blast furnace troughs, cupola runners and electric arc furnace launders, damage to the lining necessitates periodic complete renewal of the lining and more frequent repair and each of these tasks is difficult and time-consuming.
  • the inner lining of the invention may be in the form of a number of slabs, which may be flat or otherwise shaped.
  • the base and each sidewall is each lined with a succession of slabs.
  • the slabs may be joined together by means of a refractory cement and/or by means of mating joints at the edges of the slabs. Provision of the lining in the form of a number of slabs enables a new inner lining to be put in place quickly after removal of an inner lining judged to be unsuitable for further use.
  • the inner lining may be provided by use of one or more preformed, self-supporting generally U-shaped channel sections.
  • slabs held together by a flexible member e.g. wire mesh may be used, the set of slabs having, for example, a central slab for lining the base of the channel and lateral slabs for lining the sides of the channel.
  • Such sets of slabs may conveniently be packed and transported in flat condition and moved into channel configuration at the time the fining is being fitted.
  • the inner lining contains at least 75% of particulate refractory material.
  • the proportion of particulate refractory material is from 80 to 95% by weight. It is preferred that a major proportion by weight of the particulate refractory material should be provided by one or more basic or neutral refractory oxides e.g. magnesium oxide or alumina, e.g. in the form of a high alumina aluminosilicate.
  • Basic or neutral refractory oxides as the particulate refractory material enhance the resistance of the lining to the effects of molten metal and slag.
  • the particulate refractory material may include a proportion of a clay, e.g. a fireclay, and, if present, is preferably present in an amount of 3 to 10% by weight of the inner lining.
  • a clay e.g. a fireclay
  • the inclusion of a clay enhances the strength of the lining when hot, it is to be understood the necessary hot strength may be obtained using linings which do not contain clay.
  • the particulate refractory material should contain a proportion of carbon, e.g. crushed graphite electrode scrap, or silicon carbide or nitride, preferably in an amount of 3 to 20% by weight of the inner lining.
  • carbon e.g. crushed graphite electrode scrap
  • silicon carbide or nitride preferably in an amount of 3 to 20% by weight of the inner lining.
  • the inner lining may contain a proportion of refractory fibre in addition to the particulate refractory material but it is preferred that this proportion should not exceed 6% by weight of the inner lining.
  • Refractory fibres are commonly used in refractory, heat-insulating materials for lining metallurgical vessels and their inclusion generally enhances the heat-insulating properties but in accordance with the present invention it has been appreciated that the inclusion of a substantial proportion of refractory fibre has a marked adverse effect on the erosion resistance of the inner lining.
  • An inorganic and/or an organic binder may be present in the inner lining.
  • the organic binder may be, for example, a resin e.g. a urea-formaldehyde resin or a phenol-formaldehyde resin or a starch and mixtures of organic binders may be used.
  • the amount of organic binder is preferably 3 to 8% by weight.
  • An organic binder is particularly beneficial in reducing any tendency of the molten metal contacting face of the inner lining to spall in use due to initial thermal shock.
  • the inorganic binder is preferably a sodium silicate in which the weight ratio Na 2 0:Si0 2 is from 1:2.5 to 1:3.7.
  • the amount of inorganic binder is preferably 4-10% by weight of the dry inner lining.
  • the inner lining may have insufficient strength after it has cooled from its temperature of use and tend to become powdery and to crumble thereby rendering the lining unsuitable for further use. Accordingly, in such cases it is preferable for the inorganic binder to be present.
  • a part or all the sodium silicate may be replaced by a corresponding amount of a phosphate binder such as aluminium orthophosphate.
  • the density of the inner lining may be within the range of 1.5 to 1.9 g - cm- 3 .
  • heat-insulating lining compositions for metallurgical vessels that contain a proportion of particulate organic filler and/or organic fibre.
  • the inner lining in accordance with the present invention is preferably substantially free of such matter as it adversely affects the resistance of the lining to the conditions of use.
  • compositional features as described above for the inner lining can be long enough for it to be used on a considerable number of successive occasions thereby reducing the time and cost involved in maintaining a suitably lined channel.
  • the compositional features enable the risk of troublesome impurities being picked up by the molten metal from the lining to be reduced as compared with this risk in the case of conventional channel linings.
  • the inner linings of the present invention may be made by dewatering an aqueous slurry of the ingredients of the lining and oven drying the resultant shape or by hand or mechanical ramming, pressing, jolting or squeezing methods. In the case of the latter methods it is preferable to use a damp mixture of the ingredients and dry the resultant shape before use.
  • the invention includes not only the lined channels but also pre-formed self-supporting shapes for providing the inner lining.
  • Figure 1 is a vertical cross-section through a lined blast furnace distribution trough
  • Figure 2 is a part-sectioned view of an electric are furnace launder
  • Figure 3 is a part-sectioned view of an alternative construction of an electric arc furnace launder.
  • the distribution trough has outer sidewall and base portions 1, 2 and 3 and a permanent refractory lining 4.
  • a permanent refractory lining 4 Within the permanent lining 4 is an inner, replaceable lining of refractory, heat-insulating slabs 5 and 6 lining the sidewalls and base respectively.
  • an electric arc furnace launder assembly has an outer metal shell 7 (part shown cut away), a permanent refractory lining 8 and an inner, replaceable lining of pre-formed self-supporting channel sections 9.
  • FIG 3 an alternative arc furnace launder assembly is shown which has an outer permanent refractory supporting channel 10. Within the channel is a pre-formed self-supporting channel base portion 11 having partial integral sidewalls 12 and rebates 13. Sidewall slabs (only one of which is shown) are adapted to matingly joint with the partial sidewalls 12 by means of depending tongue 15.
  • a composition suitable for the reusable lining slabs of a blast furnace trough is as follows:
  • the composition was formed into slabs by making an aqueous slurry of the ingredients, dewatering the slurry in a permeable mould, removing the damp slabs so obtained and heating them to dry them and to harden the binders.
  • the reusable self-supporting channel lining sections were installed in the launder of a 10 tonne electric arc furnace directly onto the permanent cast refractory underlying layer of the launder.
  • the reusable lining was subjected to 37 heats of low carbon steel which were tapped at a temperature between 1660°C and 1700°C. The tapping time was approximately 1 to 3 minutes per heat and the time between taps averaged 3 hours. It was observed that the reusable channel lining sections performed most satisfactorily. When removed the underlying permanent refractory of the furnace launder was found to be undamaged.
  • Example II The above composition was formed into 30 mm thick slabs in the manner described in Example I.
  • the density of the dried slabs was 1.5 g/cm 3 .
  • the slabs were installed on the base and against the sidewalls of a refractory lined launder of a 2.5 tonne electric arc furnace.
  • the joints between the slabs were sealed with a refractory cement.
  • the lining was subjected to 18 heats of molten steel tapped at an average temperature of 1625°C.
  • the tapping time was 1 to 2 minutes and the time between taps averaged 4 hours.
  • the underlying permanent refractory layer of the furnace launder was undamaged.
  • the composition was formed into 75 mm thick slabs by mechanically vibrating the composition in a suitably dimensioned former.
  • the "green" slabs so obtained were removed from the former and cured by heating them in an oven for 3 hours at 180°C to remove any residual moisture and to harden the binder.
  • the density of the dried slabs was 1.75 g/cm 3 .
  • the slabs were installed in a 110 tonne arc furnace launder in the manner described in Example 2.
  • the reusable launder lining so formed was subjected to 12 heats tapped at an average temperature of 1675°C.
  • the tap time was 2 to 4 minutes and the time between taps averaged 2 hours.
  • a slab 1 was made using the recipe of Example 3 by ramming the composition into a former measuring 25x25x3 cms (nominal). The green shape was dried for 4 hours at 180°C.
  • a second slab 2 was made from the recipe of Example 3 by vacuum dewatering an aqueous slurry in a permeable mould 25x25x3 cms and then dried as above.
  • a third slab 3 was formed by ramming a recipe comprising 17% sawdust, 61% clay and 22% sodium silicate. This composition has been proposed as being suitable for forming blast furnace runner units of predetermined life time. As for slabs 1 and 2, slab 3 was dried for 4 hours at 180°C.
  • the slabs were cut into test-pieces and their thickness accurately measured (see column “a” of Table 1) and placed around the periphery of the chamber of the simulation induction furnace. 100 kg of steel was melted in the furnace and once molten, was stirred to represent the flow of metal through a blast furnace trough or arc furnace launder. The samples were subjected to this test for 47 minutes at a temperature of 1650°C. At the end of the test the furnace was drained of steel and the test-pieces allowed to cool and the thickness of the test-pieces was remeasured at the junction with the surface of the steel i.e. the slag line (see column “b” of Table 1) and at the foot of the test-piece (see column “c” of Table 1).
  • slabs 1 and 2 of the invention were in good condition and capable of reuse.
  • slab 3 was upto 50% eroded from the juncture with the molten steel surface upto 100% erosion at the bottom of the test-piece. It was clear that slab 3 was not capable of being reused.

Claims (28)

1. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal mit einer äußeren, fest eingebauten, feuerfesten Auskleidung (4, 8, 10) oder einem Metallgehäuse (7) oder einem äußeren, mit einer fest eingebauten, feuerfesten Auskleidung versehenen Metallgehäuse, dadurch gekennzeichnet, daß sich innerhalb der fest eingebauten, feuerfesten Auskleidung oder des Metallgehäuses eine innere, auswechselbare Auskleidung aus feuerfestem, wärmeisolierenden Material befindet, das zu mindestens 75 Gewichtsprozent aus feuerfesten Partikeln besteht, ein anorganisches und/oder organisches Bindemittel enthält und eine Dichte im Bereich von 1,3 gxcm-3 bis 2,2 gxcm-3 aufweist, wobei die innere, auswechselbare Auskleidung in einer Vielzahl von Einsätzen für den Transport von geschmolzenem Eisenmetall benutzt werden kann.
2. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 1, dadurch gekennzeichnet, daß die innere, auswechselbare Auskleidung aus einer Vielzahl von vorgeformten Platten (5, 6) besteht.
3. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 2, dadurch gekennzeichnet, daß der Kanal einen von den Seitenwänden (1) getrennten Bodenabschnitt (3) aufweist, wobei die innere, auswechselbare Auskleidung aus einer Aufeinanderfolge von Platten (5, 6) besteht, die den genannten Bodenabschnitt und die genannten Seitenwände auskleiden.
4. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 2, dadurch gekennzeichnet, daß die Platten (5, 6) mit Hilfe von feuerfestem Zement miteinander verbunden sind.
5. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 2, dadurch gekennzeichnet, daß die Platten (5, 6) über eine ineinandergreifende Ausführung an den Plattenkanten miteinander verbunden sind.
6. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 2, dadurch gekennzeichnet, daß die innere, auswechselbare Auskleidung aus einer oder mehreren Reihen von Platten besteht, die von einem flexiblen Bauteil zusammengehalten werden.
7. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 1, dadurch gekennzeichnet, daß die innere, auswechselbare Auskleidung aus einem oder mehreren vorgeformten, selbsttragenden Profilen (9, 11) mit im allgemeinen U-förmigem Querschnitt besteht.
8. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß irgendeinem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der größere Gewichtsanteil der feuerfesten Partikel ein oder mehrere basische oder neutrale, feuerfeste Oxide umfaßt.
9. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß irgendeinem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die feuerfesten Partikel einen Anteil an feuerfestem Ton aufweisen.
10. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 9, dadurch gekennzeichnet, daß der feuerfeste Ton 3 bis 10 Gewichtsprozent der inneren Auskleidung ausmacht.
11. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß irgendeinem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die innere, auswechselbare Auskleidung einen Anteil von einem oder mehreren der Stoffe Graphit, Siliziumkarbid oder Siliziumnitrid enthält.
12. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 11, dadurch gekennzeichnet, daß Graphit, Siliziumkarbid oder Siliziumnitrid 3 bis 20 Gewichtsprozent der inneren Auskleidung ausmacht.
13. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß irgendeinem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die innere, auswechselbare Auskleidung bis zu 6 Gewichtsprozent an feuerfestem Fasermaterial enthält.
14. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß irgendeinem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß es sich bei dem anorganischen Bindemittel um Natriumsilikat mit einem Gewichtsverhältnis von Na20 zu Si02 von 1:2,5 bis 1:3,7 handelt.
15. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 14, dadurch gekennzeichnet, daß das anorganische Bindemittel 4 bis 10 Gewichtsprozent der inneren Auskleidung ausmacht.
16. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß irgendeinem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß es sich bei dem organischen Bindemittel um einen oder mehrere der Stoffe Harnstoff-Formaldehydharz, Phenol-Formaldehydharz oder Stärke handelt.
17. Ein für geschmolzenes Eisenmetall geeigneter Transportkanal gemäß Anspruch 16, dadurch gekennzeichnet, daß das organische Bindemittel 3 bis 8 Gewichtsprozent der inneren Auskleidung ausmacht.
18. Ein Gegenstand zum Einsatz in der inneren, auswechselbaren Auskleidung eines für geschmolzenes Eisenmetall geeigneten Transportkanals, bestehend aus einem vorgeformten, selbsttragenden Auskleidungsabschnitt (9, 11) mit im allgemeinen U-förmigem Querschnitt und aus einem chemisch gebundenen, feuerfesten, wärmeisolierenden Material geformt, dadurch gekennzeichnet, daß der genannte Gegenstand zu mindestens 75 Gewichtsprozent aus feuerfesten Partikeln und einem anorganischen Bindemittel und/oder einem organischen Bindemittel besteht und eine Dichte im Bereich von 1,3 gxcm-3 bis 2,2 gxcm-3 aufweist.
19. Ein Auskleidungsabschnitt gemäß Anspruch 18, dadurch gekennzeichnet, daß der größere Gewichtsanteil der feuerfesten Partikel ein oder mehrere basische oder neutrale, feuerfeste Oxide umfaßt.
20. Ein Auskleidungsabschnitt gemäß Anspruch 18, dadurch gekennzeichnet, daß die feuerfesten Partikel einen Anteil an feuerfestem Ton enthalten.
21. Ein Auskleidungsabschnitt gemäß Anspruch 20, dadurch gekennzeichnet, daß der feuerfeste Ton 3 bis 10 Gewichtsprozent des Auskleidungsabschnitts ausmacht.
22. Ein Auskleidungsabschnitt gemäß irgendeinem der Ansprüche 18 bis 21, gekennzeichnet durch einen Anteil von einem oder mehreren der Stoffe Graphit, Siliziumkarbid oder Siliziumnitrid.
23. Ein Auskleidungsabschnitt gemäß Anspruch 22, dadurch gekennzeichnet, daß Graphit, Siliziumkarbid oder Siliziumnitrid 3 bis 20 Gewichtsprozent des Auskleidungsabschnitts ausmacht.
24. Ein Auskleidungsabschnitt gemäß irgendeinem der Ansprüche 18 bis 23, dadurch gekennzeichnet, daß der Auskleidungsabschnitt bis zu 6 Gewichtsprozent an feuerfestem Fasermaterial enthält.
25. Ein Auskleidungsabschnitt gemäß irgendeinem der Ansprüche 18 bis 24, dadurch gekennzeichnet, daß es sich bei dem anorganischen Bindemittel um Natriumsilikat mit einem Gewichtsverhältnis von Na20 zu Si02 von 1:2,5 bis 1:3,7 handelt.
26. Ein Auskleidungsabschnitt gemäß Anspruch 25, dadurch gekennzeichnet, daß das anorganische Bindemittel 4 bis 10 Gewichtsprozent des Auskleidungsabschnitts ausmacht.
27. Ein Auskleidungsabschnitt gemäß irgendeinem der Ansprüche 18 bis 26, dadurch gekennzeichnet, daß es sich bei dem organischen Bindemittel um einen oder mehrere der Stoffe Harnstoff-Formaldehydharz, Phenol-Formaldehydharz oder Stärke handelt.
28. Ein Auskleidungsabschnitt gemäß Anspruch 27, dadurch gekennzeichnet, daß das organische Bindemittel 3 bis 8 Gewichtsprozent des Auskleidungsabschnitts ausmacht.
EP82304772A 1981-09-19 1982-09-10 Rinne für Metallschmelzen Expired EP0076577B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82304772T ATE19657T1 (de) 1981-09-19 1982-09-10 Rinne fuer metallschmelzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8128419 1981-09-19
GB8128419 1981-09-19

Publications (2)

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EP0076577A1 EP0076577A1 (de) 1983-04-13
EP0076577B1 true EP0076577B1 (de) 1986-05-07

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EP (1) EP0076577B1 (de)
JP (1) JPS5866782A (de)
KR (1) KR840001636A (de)
AR (1) AR230795A1 (de)
AT (1) ATE19657T1 (de)
AU (1) AU548095B2 (de)
BR (1) BR8205469A (de)
DE (1) DE3271012D1 (de)
ES (1) ES8400490A1 (de)
IN (1) IN158955B (de)
MX (1) MX159623A (de)
ZA (1) ZA826661B (de)

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NL1007881C2 (nl) * 1997-12-23 1999-06-24 Hoogovens Tech Services Goot voor het geleiden van een stroom vloeibaar metaal.
AU5945600A (en) * 1999-09-28 2001-03-29 Amsted Industries Incorporated Protective lining for a casting machine pouring trough
DE29922336U1 (de) * 1999-12-21 2000-02-24 Wurtz Paul Antoine Rinnenanordnung
JP5261332B2 (ja) * 2009-09-24 2013-08-14 北芝電機株式会社 溶解炉
CA2887425C (en) 2009-12-10 2016-07-05 Novelis Inc. Molten metal-containing vessel and methods of producing same
SE535815C2 (sv) * 2011-05-24 2013-01-02 Automation Press And Tooling A P & T Ab Förfarande och anordning för minskning av värmeförlusten hos ett upphettat arbetsstycke
CN107142345B (zh) * 2017-06-30 2023-09-12 秦冶工程技术(北京)有限责任公司 高炉熔渣沟流嘴
CN110479971B (zh) * 2019-09-26 2022-07-29 沈阳恒泰鑫源精铸耐材有限公司 一种超薄型铝基流钢槽
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ATE19657T1 (de) 1986-05-15
JPS5866782A (ja) 1983-04-21
AU548095B2 (en) 1985-11-21
DE3271012D1 (en) 1986-06-12
KR840001636A (ko) 1984-05-16
MX159623A (es) 1989-07-19
EP0076577A1 (de) 1983-04-13
ZA826661B (en) 1983-10-26
IN158955B (de) 1987-02-28
AU8871682A (en) 1983-06-16
ES515790A0 (es) 1983-11-01
BR8205469A (pt) 1983-08-23
AR230795A1 (es) 1984-07-31
ES8400490A1 (es) 1983-11-01

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