Patent US3886245A successfully refreshed from Google Patents.
US3886245A
Expired / Lapsed
US
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Method for producing bricks from red mud
Assignee: BK Giulini Chemie GmbH
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Filing: 1971-12-21
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Granted: 1975-05-27
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Expires: 1991-12-21
Abstract
Abstract A method for producing bricks from red mud, including mixing red mud having a water content of 15 to 35 weight-% with clay to provide a resulting mixture containing 50 to 92 weight-% red mud based on the dry weight of the resulting mixture, forming the resulting mixture at a water content of 18 to 25 weight-% into raw bricks, drying the raw bricks with heated gases at a temperature below 70*C, and burning the raw bricks at a temperature from 900* to 1000*C.
Inventors
- 👤 Gerhard Bayer
- 👤 Egon Cherdron
- 👤 Manfred Haerter
- 👤 Ernst Hecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:38
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/006; C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/132; C04B33/1321; C04B33/1322; Y; Y02; Y02P; Y02P40/00; Y02P40/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
A METHOD FOR PRODUCING BRICKS FROM RED MUD CONTAINING FREE ALKALI WHEREIN NO SOFTENING OCCURS DURING FIRING OF THE BRICKS, COMPRISING MIXING RED MUD HAVING A RESIDUAL WATER CONTENT OF 15 TO 35 WEIGHT-%, BASED ON THE WEIGHT OF DRY RED MUD, WITH CLAY WHICH CAN CHEMICALLY BOND WITH AND VITRIFY THE FREE ALKALI IN THE RED MUD TO PROVIDE A RESULTING MIXTURE CONTAINING 50 TO 92 WEIGHT-% RED MUD BASED ON THE DRY WEIGHT OF THE RESULTING MIXTURE, FORMING THE RESULTING MIXTURE AT A
Claim 2
Independent Claim
85 words
A METHOD FOR PRODUCING BRICKS FROM RED MUD CONTAINING FREE ALKALI WHEREIN NO SOFTENING OCCURS DURING FIRING OF THE BRICKS, COMPRISING MIXING RED MUD HAVING A RESIDUAL WATER CONTENT OF 15 TO 35 WEIGHT-%, BASED ON THE WEIGHT OF DRY RED MUD, WITH CLAY WHICH CAN CHEMICALLY BOND WITH AND VITRIFY THE FREE ALKALI IN THE RED MUD TO PROVIDE A RESULTING MIXTURE CONTAINING 50 TO 92 WEIGHT-% RED MUD BASED ON THE DRY WEIGHT OF THE RESULTING MIXTURE, FORMING THE RESULTING MIXTURE AT A
Claim 3
Dependent Claim
33 words
A method as claimed in claim 1, wherein the residual water content of the red mud is 20 to 25 weight-%, and wherein the resultiNg mixture contains 70 to 90 weight-% red mud.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 1, wherein the resulting mixture is subjected to a compression pressure of 8 to 12 atmospheres gage pressure during the extrusion molding.
Claim 5
Dependent Claim
17 words
A method as claimed in claim 3, further including applying a vacuum during the step of forming.
Claim 6
Dependent Claim
12 words
A method as claimed in claim 1 wherein the clay is kaolinic.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |