US4105457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Briquet and method of making same
Assignee: ZURICH BRANCH OF MIDREX INTERNATIONAL BV A NETHERLANDS Corp
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Filing: 1977-06-22
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Granted: 1978-08-08
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Expires: 1997-06-22
Abstract
Abstract A briquet consisting of agglomerated directly reduced metallized particles, or mineral ore particles or a mixture thereof and a binder consisting of hydrated lime, sodium silicate and water. The method of making the briquet is also disclosed.
Inventors
- 👤 Wolfgang B. Pietsch
- 👤 Charles A. Schroer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:20
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/244; C04; C04B; C04B28/00; C04B28/24; C04B28/26; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C09; C09J; C09J1/00; C09J1/02; C21; C21B; C21B13/00; C21B13/0086; C22B1/243; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
A metallized iron briquet consisting essentially of from about 85 percent to about 95 percent directly reduced metallized iron and from about 5 percent to about 15 percent of a binder comprising: (a) from about 15 to about 40 percent hydrated lime, (b) from about 15 to about 45 percent liquid sodium silicate, and (c) up to 60 percent water.
Claim 2
Dependent Claim
60 words
A metallized iron briquet consisting essentially of from about 85 percent to about 95 percent directly reduced metallized iron and from about 5 percent to about 15 percent of a binder comprising: (a) from about 15 to about 40 percent hydrated lime, (b) from about 15 to about 45 percent liquid sodium silicate, and (c) up to 60 percent water.
Claim 3
Dependent Claim
76 words
A briquet consisting essentially of from about 85 to about 95 percent of particulate material from the group consisting of directly reduced finely divided metallized material, metallized oxide fines, finely divided metal ores, and mixtures thereof and from about 5 to about 15 percent of a binder comprising: (a) from about 15 to about 40 percent hydrated lime, (b) from about 15 to about 45 percent liquid sodium silicate, and (c) up to 60 percent water.
Claim 4
Dependent Claim
76 words
A briquet consisting essentially of from about 85 to about 95 percent of particulate material from the group consisting of directly reduced finely divided metallized material, metallized oxide fines, finely divided metal ores, and mixtures thereof and from about 5 to about 15 percent of a binder comprising: (a) from about 15 to about 40 percent hydrated lime, (b) from about 15 to about 45 percent liquid sodium silicate, and (c) up to 60 percent water.
Claim 5
Dependent Claim
11 words
A briquet according to claim 2 wherein said metal is iron.
Claim 6
Independent Claim
108 words
A method of making a briquet from particulate material from the group consisting of directly reduced finely divided metallized material, metal oxide fines, finely divided metal ores, and mixtures thereof, comprising: (a) mixing from 85 to 95 percent of particulate material with from about 5 to about 15 percent of a binder comprising: (1) about 15 to about 40 percent hydrated lime in powdered form, (2) about 15 to about 45 percent aqueous solution of liquid sodium silicate, and (3) up to 60 percent water to form a free flowing yet dense briquet feed material; (b) densifying said feed material; and (c) forming said feed material into briquets.
Claim 7
Independent Claim
108 words
A method of making a briquet from particulate material from the group consisting of directly reduced finely divided metallized material, metal oxide fines, finely divided metal ores, and mixtures thereof, comprising: (a) mixing from 85 to 95 percent of particulate material with from about 5 to about 15 percent of a binder comprising: (1) about 15 to about 40 percent hydrated lime in powdered form, (2) about 15 to about 45 percent aqueous solution of liquid sodium silicate, and (3) up to 60 percent water to form a free flowing yet dense briquet feed material; (b) densifying said feed material; and (c) forming said feed material into briquets.
Claim 8
Dependent Claim
11 words
A method according to claim 4 wherein said metal is iron.
Claim 9
Dependent Claim
19 words
A method according to claim 4 wherein the particle size of said hydrated lime is all minus 100 mesh.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |