Patent US4366255A successfully refreshed from Google Patents.
US4366255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly reinforced refractory concrete with 4-20 volume % steel fibers
Assignee: WAHL REFRACTORIES Inc CORP OF OH
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Filing: 1981-03-23
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Granted: 1982-12-28
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Expires: 2001-03-23
Abstract
Abstract A highly reinforced refractory is disclosed. In accordance with the invention higher reinforcement of refractory shapes such as plunging bells or injection lances is achieved by infiltrating a bed of metal fibers in a mold with an aqueous slurry of a refractory material containing a superplasticizer. Refractory Concrete comprises e.g. calcium aluminate cement, alumina aggregate of 35 mesh or less maximum particle size, sulfonated naphthalene formaldhyde as superplasticizer and greater than 4 volume % metal (steel) fibers.
Inventors
- 👤 David R. Lankard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:00
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B35/00; C04B35/71; C04B35/74; C04B35/76; C04B2111/00; C04B2111/00431
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
35 words
A refractory shape comprising a refractory concrete reinforced with greater than about 4% by volume of metal fibers said concrete containing a refractory aggregate having a maximum particle size of about 35 mesh or less.
Claim 2
Dependent Claim
35 words
A refractory shape comprising a refractory concrete reinforced with greater than about 4% by volume of metal fibers said concrete containing a refractory aggregate having a maximum particle size of about 35 mesh or less.
Claim 3
Dependent Claim
12 words
The refractory shape of claim 1 wherein said metal fibers are steel.
Claim 4
Dependent Claim
20 words
The refractory shape of claim 2 wherein said steel fibers are present in an amount of about 8-14% by volume.
Claim 5
Dependent Claim
17 words
The refractory shape of claim 3 wherein said metal fibers have a diameter of approximately 10-30 mil.
Claim 6
Dependent Claim
18 words
The refractory shape of claim 4 wherein said metal fibers have an aspect ratio of 50 or more.
Claim 7
Dependent Claim
18 words
The refractory shape of claim 1 wherein said shapes are plunging bells or injection lances or pier blocks.
Claim 8
Dependent Claim
101 words
A process for reinforcing a refractory shape which comprises: (a) preparing an aqueous slurry of a refractory concrete containing refractory aggregate having a maximum particle size of 35 mesh or less and a superplasticizer, (b) placing a bed of metal fibers in a mold, wherein said bed of metal fiber is about 4 to 20% by volume of said mold, (c) adding said slurry to said fibers while vibrating the mold such that said refractory concrete fills said mold and uniformly infiltrates said bed of metal fibers, (d) allowing said refractory concrete to harden, and (e) drying the refractory shape obtained.
Claim 9
Dependent Claim
101 words
A process for reinforcing a refractory shape which comprises: (a) preparing an aqueous slurry of a refractory concrete containing refractory aggregate having a maximum particle size of 35 mesh or less and a superplasticizer, (b) placing a bed of metal fibers in a mold, wherein said bed of metal fiber is about 4 to 20% by volume of said mold, (c) adding said slurry to said fibers while vibrating the mold such that said refractory concrete fills said mold and uniformly infiltrates said bed of metal fibers, (d) allowing said refractory concrete to harden, and (e) drying the refractory shape obtained.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein said fibers are steel fibers.
Claim 11
Dependent Claim
15 words
The process of claim 8 wherein said fibers have a diameter of about 10-30 mil.
Claim 12
Dependent Claim
13 words
The process of claim 7 wherein said superplasticizer is a sulfonated naphthalenic formaldehyde.
Claim 13
Dependent Claim
21 words
The refractory shape of claim 1 wherein said refractory aggregate has a maximum particle size of about 48 mesh or less.
Claim 14
Dependent Claim
18 words
The process of claim 7 wherein said aggregate has a particle size of about 48 mesh or less.
References Cited (Backward Citations)
US4208214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |