US3896247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal shock protection for refractory material subject to molten metals
Assignee: Groupement Atomique Alsacienne Atlantique SA
•
Filing: 1974-02-05
•
Granted: 1975-07-22
•
Expires: 1994-02-05
Abstract
Abstract Method and device for protection against thermal shocks on refractory materials which are not very conductive, such as ceramic substances, intended to be brought repeatedly into contact with very corrosive melted substances such as aluminium. Slots having no great depth, rounded off at their ends, are formed at the surface of the substances put into contact with the molten metals. Those slots are stuffed with compacted ceramic fibres which are impermeable to the molten metals. Application is to the protecting of the body of conduction pumps immersible in liquid aluminium.
Inventors
- 👤 Pierre Descleve
- 👤 Jean-Claude Megnin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:58
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/02; H02K44/04; B; B29; B29K; B29K2303/00; B29K2303/04; B29K2303/06; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/218; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314; Y10T428/24479; Y10T428/24488; Y10T428/24777; Y10T428/24942; Y10T428/24992
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
IN A REFRACTORY MATERIAL STRUCTURE FOR REPEATED IMMERSION IN A VERY HOT AND CORROSIVE FLUID MEDIUM SUCH AS MOLTEN ALUMINUM, THE IMPROVEMENT WHEREIN SAID ELEMENT COMPRISES A BLOCK OF REFRACTORY MATERIAL HAVING AT LEAST ONE NETWORK OF SLOTS WITHIN THE SURFACE THEREOF AND A MATERIAL STUFFING WITHIN SAID SLOTS WHICH IS MORE COMPRESSIBLE THAN THE REFRACTORY MATERIAL TO BE PROTECTED AND NONPERMEABLE TO SAID FLUID MEDIUM.
Claim 2
Dependent Claim
66 words
IN A REFRACTORY MATERIAL STRUCTURE FOR REPEATED IMMERSION IN A VERY HOT AND CORROSIVE FLUID MEDIUM SUCH AS MOLTEN ALUMINUM, THE IMPROVEMENT WHEREIN SAID ELEMENT COMPRISES A BLOCK OF REFRACTORY MATERIAL HAVING AT LEAST ONE NETWORK OF SLOTS WITHIN THE SURFACE THEREOF AND A MATERIAL STUFFING WITHIN SAID SLOTS WHICH IS MORE COMPRESSIBLE THAN THE REFRACTORY MATERIAL TO BE PROTECTED AND NONPERMEABLE TO SAID FLUID MEDIUM.
Claim 3
Dependent Claim
51 words
The refractory material structure as claimed in claim 1, wherein: strip plates having substantially the same composition as the block of refractory material and having lower density, are carried by said block of refractory material on the surface thereof and are separated by grooves stuffed with said non permeable, compressible material.
Claim 4
Dependent Claim
23 words
The structure according to claim 1, wherein, slots extend inwardly from the surface of said block and terminate in enlarged diameter cylindrical borings.
Claim 5
Dependent Claim
34 words
The structure according to claim 1 wherein, each slot terminates at its end remote from the surface of the block in a cylindrical boring whose axis is parallel to the plane of the slot.
Claim 6
Dependent Claim
27 words
The structure according to claim 1, wherein the compressible stuffing material, impermeable to the fluid to be treated is constituted by very thin and compacted refractory fibers.
Claim 7
Dependent Claim
27 words
The structure according to claim 3, wherein the refractory material implemented is a ceramic substance and the compressible material impermeable to the liquid comprises compacted alumina fibers.
Claim 8
Dependent Claim
29 words
The structure according to claim 6, wherein the compressible material impermeable to the molten metal is constituted by a mixture of thin alumina fibers and of thin silica fibers.
Claim 9
Dependent Claim
58 words
The structure according to claim 2, wherein the refractory block is formed by a ceramic substance and the strip plates are adhered to said block of ceramic substance by means of a paste product formed by a finely divided mixture of refractory fibers subsequently bound by means of an inorganic binding agent and of a ceramic binding agent.
Claim 10
Dependent Claim
17 words
The structure according to claim 7, wherein the mixture of finely divided ceramic fibers comprises alumina fibers.
Claim 11
Dependent Claim
17 words
The structure according to claim 9, wherein the miXture of finely divided ceramic fibers comprises silica fibers.
Claim 12
Dependent Claim
26 words
The structure according to claim 8, wherein the incompressible and impermeable material stuffing the grooves between the strip plates is constituted by fine compacted refractory fibers.
Claim 13
Dependent Claim
16 words
The structure according to claim 11 wherein the ceramic fibers comprise alumina fibers and silica fibers.
Claim 14
Dependent Claim
64 words
The structure according to claim 4 wherein the refractory material is in the form of a substantially circular cylinder for coming into contact with a liquid metal along the said lateral surface, and wherein protection is ensured by a network of radial slots, each ending in a cylindrical bore whose axis is parallel to the axis of revolution of said cylinder of refractory material.
Claim 15
Dependent Claim
36 words
The structure according to claim 13, wherein a network of radial slots leads out onto the base of said cylinder and ends in cylindrical bores whose axes are contained in a plane parallel to said base.
References Cited (Backward Citations)
US3242239A
Cited
US3542489A
Cited
US3505158A
Cited
US3552533A
Cited
US3656867A
Cited
US3712428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |