US3779782A
Expired / Lapsed
US
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Bentonite binder composition
Assignee: United States Steel Corp
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Filing: 1971-05-20
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Granted: 1973-12-18
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Expires: 1991-05-20
Abstract
Abstract A bentonite binder composition and method of preparation is disclosed. The binder composition is particularly useful for pelletizing iron ore fines. It is prepared by intimately combining and mixing wet bentonite in a stockpile with soda ash, the moisture in the wet bentonite bringing about reaction to form an improved binder after a suitable aging period.
Inventors
- 👤 D Erickson
- 👤 E Palusky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:57
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/243; Y; Y10; Y10S; Y10S106/00; Y10S106/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
13 words
The method of claim 1 wherein said bentonite is a high sodium bentonite.
Claim 2
Dependent Claim
53 words
The method of claim 1 wherein said bentonite has the composition Composition % by Weight % Total Fe 2.9 - 5.5 % Al2O3 17.0 - 21.5 % SiO2 57.0 - 67.0 % Na2O1.8 - 2.7 % CaO 1.7 - 2.6 % MgO 1.5 -2.8 % H2O 25.0 - 30.0 pH 8.6 - 9.7
Claim 3
Dependent Claim
55 words
The method of claim 1 wherein said sodium carbonate has a density of about 47 pounds per cubic foot and sizes in the following ranges: Size % Plus Range % 40 mesh 4.0 - 12.0 80 mesh 67.0 - 80.0 100 mesh 75.0 - 90.0 200 mesh 97.0 - 99.0 -200 mesh 3.0 - 1.0
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said sodium carbonate has a composition in the following ranges: % by Weight Na2CO3 99.6 - 99.9 NaCl0.02 - 0.04 Na2SO4 0.05 -0.13
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said sodium carbonate is used in the form of trona.
References Cited (Backward Citations)
US3115416A
Cited
US3240616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |