Patent EP0202004A2 successfully refreshed from Google Patents.
EP0202004A2
Expired / Lapsed
EP
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Pouring tubes
Assignee: Foseco International Ltd
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Filing: 1986-03-26
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Granted: —
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Expires: 2006-03-26
Abstract
Abstract A pouring tube, for use in metal casting e.g. in continuous casting between e.g. a ladle and a tundish, comprises an outer metal casing and an inner lining formed of a self-set, foamed, refractory composition in which the inner lining is formed from a self-setting, foamed, refractory composition comprising particulate refractory material, surfactant and as binder an alkali metal silicate or an alkali-stabilised phenol-formaldehyde resol resin and as setting agent for the binder a liquid ester.
Inventors
- 👤 Charles Taft
- 👤 Andrew Barnes
- 👤 James Flood
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 15:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; B; B22; B22D; B22D41/00; B22D41/50; B22D41/52; B22D41/54; C04B26/00; C04B26/02; C04B26/10; C04B26/12; C04B26/122; C04B28/00; C04B28/24; C04B28/26; C04B2103/00; C04B2103/40; C04B2111/00; C04B2111/00474; C04B2111/00612; C04B2111/0087
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
60 words
A pouring tube comprising an outer metal casing and an inner lining characterised in that the inner lining is formed of a self-set, foamed,refractory composition which comprises a particulate refractory material and a binder system comprising:- a) as binder, an alkali metal silicate or an alkali-stabilised phenol-formaldehyde resol resin and b) as setting agent for the binder a liquid ester.
Claim 2
Dependent Claim
60 words
A pouring tube comprising an outer metal casing and an inner lining characterised in that the inner lining is formed of a self-set, foamed,refractory composition which comprises a particulate refractory material and a binder system comprising:- a) as binder, an alkali metal silicate or an alkali-stabilised phenol-formaldehyde resol resin and b) as setting agent for the binder a liquid ester.
Claim 3
Dependent Claim
38 words
A pouring tube according to claim 1 characterised in that the particulate refractory material of the inner lining is selected from one or more of calcined magnesite, calcined dolomite, olivine, zircon, alumina, calcined bauxite, silica, chromite and corundum.
Claim 4
Dependent Claim
22 words
A pouring tube according to claim 1 characterised in that the particulate material of the inner lining is a basic refractory material.
Claim 5
Dependent Claim
27 words
A pouring tube according to any preceding claim characterised in that the proportion of refractory material of the inner lining is from 70 to 95% by weight.
Claim 6
Dependent Claim
33 words
A pouring tube according to any preceding claim characterised in that the alkali-stabilised phenol-formaldehyde resol resin of the inner lining has a molar ratio of phenol to formaldehyde of from 1:1 to 1:3.
Claim 7
Dependent Claim
24 words
A pouring tube according to claim 5 characterised in that the proportion of alkali-stabilised phenol-formaldehyde resol resin is from 0.9 to 3% by weight.
Claim 8
Dependent Claim
40 words
A pouring tube according to any preceding claim characterised in that the liquid ester of the inner lining is selected from one or more of an ester of glycerol, an ester of ethylene glycol, a carbonate ester and a lactone.
Claim 9
Dependent Claim
28 words
A pouring tube according to claim 5 or claim 6 characterised in that the proportion of liquid ester is from 20 to 40% by weight of the resin.
Claim 10
Dependent Claim
31 words
A pouring tube according to claim 1 characterised in that the binder of the inner lining comprises an alkali-stabilised phenol-formaldehyde resol resin and the refractory composition also contains a sinter aid.
Claim 11
Dependent Claim
29 words
A pouring tube according to claim 9 characterised in that the sinter aid is selected from one or more of sodium borate, calcium tetraborate, powdered glass and ball clay.
Claim 12
Dependent Claim
25 words
A pouring tube according to any preceding claim characterised in that the density of the inner lining is from 1 to 2 g.cm- 3 .
Claim 13
Independent Claim
35 words
A method of forming a pouring tube according to any of claims 1 to 1 characterised by introducing, a self-setting, foamed, refractory composition comprising a particulate refractory material, a surfactant, and a binder system comprising:-
Claim 14
Dependent Claim
70 words
a) as binder, aqueous alkali metal silicate or an alkali-stabilised aqueous solution of a phenol-formaldehyde resol resin and b) as setting agent for the binder a liquid ester, into a gap defined between a removable former and a tubular sheet metal casing until the gap between the former and casing is filled, allowing the composition to set, removing the removable former and drying the inner lining to remove residual water.
Claim 15
Dependent Claim
70 words
a) as binder, aqueous alkali metal silicate or an alkali-stabilised aqueous solution of a phenol-formaldehyde resol resin and b) as setting agent for the binder a liquid ester, into a gap defined between a removable former and a tubular sheet metal casing until the gap between the former and casing is filled, allowing the composition to set, removing the removable former and drying the inner lining to remove residual water.
Claim 16
Dependent Claim
13 words
A method according to claim 12 characterised in that the surfactant is anionic.
Claim 17
Dependent Claim
21 words
A method according to claim 13 characterised in that the surfactant is a long chain alkyl sulphate or alkyl ether sulphate.
Claim 18
Independent Claim
26 words
A method according to any of claims 12 to 14 characterised in that the proportion of surfactant is from 0.01 to 1.0% by weight surfactant solids.
Claim 19
Independent Claim
45 words
A method according to any of claims 12 to 15 characterised in that the aqueous alkali metal silicate is aqueous sodium silicate having a solids content of 40 to 60% by weight and a SiO 2 :Na 2 O ratio of from 2 to 3:1.
Claim 20
Dependent Claim
24 words
A method according to claim 16 characterised in that the proportion of sodium silicate is from 1 to 5% by weight of silicate solids.
Claim 21
Dependent Claim
29 words
A method according to claim 16 or claim 17 characterised in that the proportion of liquid ester is from 8 to 20% by weight of the alkali metal silicate.
Claim 22
Independent Claim
38 words
A method of casting molten metal characterised in that the molten metal is transferred from an outlet in a casting ladle in to a continuous casting tundish via pouring tube according to any of claims 1 to 11.
References Cited (Backward Citations)
No citation records indexed.
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