US3886244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing bricks from red mud
Assignee: BK Giulini Chemie GmbH
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Filing: 1972-10-10
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Granted: 1975-05-27
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Expires: 1992-10-10
Abstract
Abstract A method for producing bricks from red mud, including mixing filter-wet red mud with a water-fixing substance, then mixing the mixture of red mud and water-fixing substance with clay to provide a resulting mixture containing 50 to 92 weight percent red mud based on the dry weight of red mud plus clay, and waterfixing substance, forming the resulting mixture into raw bricks, drying the raw bricks with heated gases at a temperature below 70*C, and firing the dried raw bricks at a temperature between 900*-1,100*C.
Inventors
- 👤 Gerhard Bayer
- 👤 Egon Cherdron
- 👤 Manfred Haerter
- 👤 Ernst Hecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:33
CPC Classifications
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: 8
Claim 1
Independent Claim
170 words
A METHOD FOR PRODUCING BRICKS FROM RED MUD, COMPRISING MIXING FILTER-WET RED MUD CONTAINING BETWEEN 35 TO 50 WEIGHT PERCENT WATER, BASED ON THE WET WEIGHT OF THE RED MUD, WITH FROM 5 TO 30 WEIGHT PERCENT, BASED ON THE DRY WEIGHT OF THE RED MUD, OF A WATER-ABSORBING SUBSTANCE WHICH IS AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF FLY ASH, SILICA GEL, ALUMINA GEL, CORK, PEAT, SAWDUST, COAL DUST, PAPER WASTE AND TEXTILE WASTE, THEN MIXING THE MIXTURE OF RED MUD AND WATER-ABSORBING SUBSTANCE WITH CLAY TO PROVIDE A RESULTING MIXTURE CONTAINING 50 TO 92 WEIGHT PERCENT RED MUD BASED ON THE DRY WEIGHT OF RED MUD PLUS CLAY, PLUS WATER-ABSORBING SUBSTRATE, FORMING SAID RESULTING MIXTURE INTO RAW BRICKS BY EXTRUSION PRESSING, DRYING THE RAW BRICKS TO A RESIDUAL WATER CONTENT OF ABOUT 1.2 TO 4.0 WEIGHT PERCENT, BASED ON THE WET WEIGHT OF THE RAW BRICK, WITH HEATED GASES AT A TEMPERATURE BELOW 70*C, AND FIRING THE DRIED RAW BRICKS AT A TEMPERATURE BELOW 900*-1,100*C.
Claim 2
Independent Claim
170 words
A METHOD FOR PRODUCING BRICKS FROM RED MUD, COMPRISING MIXING FILTER-WET RED MUD CONTAINING BETWEEN 35 TO 50 WEIGHT PERCENT WATER, BASED ON THE WET WEIGHT OF THE RED MUD, WITH FROM 5 TO 30 WEIGHT PERCENT, BASED ON THE DRY WEIGHT OF THE RED MUD, OF A WATER-ABSORBING SUBSTANCE WHICH IS AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF FLY ASH, SILICA GEL, ALUMINA GEL, CORK, PEAT, SAWDUST, COAL DUST, PAPER WASTE AND TEXTILE WASTE, THEN MIXING THE MIXTURE OF RED MUD AND WATER-ABSORBING SUBSTANCE WITH CLAY TO PROVIDE A RESULTING MIXTURE CONTAINING 50 TO 92 WEIGHT PERCENT RED MUD BASED ON THE DRY WEIGHT OF RED MUD PLUS CLAY, PLUS WATER-ABSORBING SUBSTRATE, FORMING SAID RESULTING MIXTURE INTO RAW BRICKS BY EXTRUSION PRESSING, DRYING THE RAW BRICKS TO A RESIDUAL WATER CONTENT OF ABOUT 1.2 TO 4.0 WEIGHT PERCENT, BASED ON THE WET WEIGHT OF THE RAW BRICK, WITH HEATED GASES AT A TEMPERATURE BELOW 70*C, AND FIRING THE DRIED RAW BRICKS AT A TEMPERATURE BELOW 900*-1,100*C.
Claim 3
Dependent Claim
19 words
A method as claimed in claim 1 wherein the water-absorbing substance has a maximum particle size of 4 millimeters.
Claim 4
Dependent Claim
20 words
A method as claimed in claim 2 wherein the water-absorbing substance is mixed with the red mud directly after filtration.
Claim 5
Dependent Claim
31 words
A method as claimed in claim 1 wherein, based on the dry weight of the red mud, 10 to 25 weight percent water-absorbing substance is mixed with the filter-wet red mud.
Claim 6
Dependent Claim
19 words
A method as claimed in claim 4, wherein the water-absorbing substance has a maximum particle size of 2 millimeters.
Claim 7
Dependent Claim
116 words
A method as claimed in claim 1, wherein the filter-wet red mud contains 39.6 weight percent water, based on the wet weight of the red mud, the water-absorbing substance is cork meal, mixed with the red mud in the ratio filter-wet red mud to cork meal of 200kg/30kg, the mixture of red mud and cork meal is mixed with clay in a ratio of 50 tons of mixture to 7.5 tons of clay, forming is at 8 atmospheres gage pressure, drying is at 45*C for 24 hours to a residual water content of 4 weight percent, based on the wet weight of the raw bricks, and firing is at 980 to 1, 000*C for 20 hOurs.
Claim 8
Dependent Claim
109 words
A method as claimed in claim 1, wherein the filter-wet red mud contains 39.6 weight percent water, based on the wet weight of the red mud, the water-absorbing substance is fly ash mixed with the red mud in the ratio red mud to fly ash 200kg/50kg, the mixture of red mud and fly ash is mixed with clay in a ratio of 25 tons of mixture to 4 tons of clay, forming is at 8.5 atmospheres gage pressure, drying is at 60*C for 15 hours to a residual water content of 1.2 weight-percent, based on the wet weight of the raw bricks, and firing is at 1,000* to 1,020*C.
References Cited (Backward Citations)
US3591393A
Cited
US3679441A
Cited
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 |