Claims
- 1. A method for agglomerating finely divided agglomerative material comprising,
- feeding finely divided agglomerative material into a substantially horizontal rotating drum having an inner wall, said drum having a longitudinal axis and said drum arranged to rotate about said longitudinal axis,
- depositing a layer of said finely divided agglomerative material on said drum inner wall,
- rotating a longitudinally extending scraper in said drum in the same direction of rotation as said drum in fixed timed relation to the rotation of said drum to form a preselected number of longitudinally extending ridges according to the following formula: ##EQU3## N = a whole number and number of ridges formed b = number of scraper blades
- U.sub.1 = drum speed, rpm
- U.sub.2 = scraper speed, rpm,
- forming a plurality of elongated alternating and longitudinally extending ridges and valleys in said layer, said ridges and valleys extending substantially lengthwise along said drum inner wall and substantially parallel to said drum longitudinal axis,
- controlling the ratio of speeds of said rotating drum and said rotating scraper to control the height and number of longitudinally extending ridges and valleys formed in said layer, and
- maintaining said same ridges and same valleys so formed in said layer deposited on the drum inner wall while rotating said drum and forming agglomerates from other finely divided agglomerative material introduced into said rotary drum.
- 2. A method for agglomerating finely divided agglomerative material as set forth in claim 1 which includes,
- forming a bed of other finely divided material in said drum,
- rotating said drum and forming an upper inclined surface on said bed,
- moving said longitudinally extending ridges and valleys under said bed and lifting a portion of said other agglomerative material adjacent said drum inner wall with said longitudinally extending ridges and valleys and thereafter depositing the lifted portion of said other agglomerative material on the upper inclined surface of said bed.
- 3. A method for agglomerating finely divided agglomerative material as set forth in claim 1 which includes,
- rotating said scraper at a speed 6 times the speed of the rotating drum to thereby form 24 longitudinally extending ridges and 24 longitudinally extending valleys in said layer.
- 4. A method for agglomerating finely divided agglomerative material as set forth in claim 1 which includes,
- rotating said scraper at a speed 8 times the speed of the rotating drum to thereby form 32 longitudinally extending ridges and 32 longitudinally extending valleys in said layer.
- 5. A method for agglomerating finely divided agglomerative material as set forth in claim 1 in which,
- said finely divided agglomerative material includes bituminous coal and char heated to an elevated temperature before being introduced into said rotating drum.
Parent Case Info
This application is a continuation of Ser. No. 466,832, filed on May 3, 1974, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (2)
Number |
Date |
Country |
627,037 |
Jan 1961 |
CA |
1,349,285 |
Jan 1963 |
FR |
Continuations (1)
|
Number |
Date |
Country |
Parent |
466832 |
May 1974 |
|