US3969103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing ball agglomerated particulate material
Assignee: National Research Council Canada
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Filing: 1974-11-29
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Granted: 1976-07-13
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Expires: 1994-11-29
Abstract
Abstract Ball agglomerated particulate material is produced by comminuting the material to produce coarse particles having a size predominantly within the range 0.3 mm to 1.4 mm, and fines, then feeding the coarse particles, fines and an agglomerating liquid into a rotating ball agglomerating mill with the volume fraction of the coarse particles being 20% to 80% by volume of the total solids feed to the mill, continuing rotation of the mill until agglomerated balls are produced having a continuous network of fines interspersed with the coarse particles such that: 1 - epsilon 1 - epsilon O 1 = K epsilon epsilon O 1 - m WHERE epsilon = THE POROSITY OF THE AGGLOMERATES, epsilon O = THE POROSITY OF SIMILAR AGGLOMERATES FORMED ENTIRELY OF THE FINES, M IS THE ABOVE MENTIONED VOLUME FRACTION OF COARSE PARTICLES, AND K = 0.7 to 1.
Inventors
- 👤 Charles E. Capes
- 👤 Allan E. McIlhinney
- 👤 Ira E. Puddington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:55
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
171 words
A method of producing ball agglomerated particulate material, comprising: a. comminuting the material to produce particulate material therefrom consisting of coarse particles having a particle size predominantly within the range 0.3 mm to 1.4 mm, and fines having particles predominantly less than 0.2 mm, b. feeding into a rotating, ball agglomerating mill a feed consisting of the coarse particles, the fines and an agglomerating liquid, with the volume fraction (m) of the coarse particles being in the range 20% to 80% of the total solids content of the total feed, c. continuing rotation of the ball agglomerating mill until agglomerated balls of the particulate material are produced having a continuous network of the fines interspersed with the coarse particles such that: ##EQU6## where ε = the porosity of the agglomerates, ε o = the porosity of similar agglomerates formed entirely of the fines, m is the above mentioned volume fraction of coarse particles, and k = 0.7 to 1.0 and then d. removing the agglomerated balls from the ball agglomerating mill.
Claim 2
Independent Claim
171 words
A method of producing ball agglomerated particulate material, comprising: a. comminuting the material to produce particulate material therefrom consisting of coarse particles having a particle size predominantly within the range 0.3 mm to 1.4 mm, and fines having particles predominantly less than 0.2 mm, b. feeding into a rotating, ball agglomerating mill a feed consisting of the coarse particles, the fines and an agglomerating liquid, with the volume fraction (m) of the coarse particles being in the range 20% to 80% of the total solids content of the total feed, c. continuing rotation of the ball agglomerating mill until agglomerated balls of the particulate material are produced having a continuous network of the fines interspersed with the coarse particles such that: ##EQU6## where ε = the porosity of the agglomerates, ε o = the porosity of similar agglomerates formed entirely of the fines, m is the above mentioned volume fraction of coarse particles, and k = 0.7 to 1.0 and then d. removing the agglomerated balls from the ball agglomerating mill.
Claim 3
Dependent Claim
52 words
A method according to claim 1, wherein the coarse particles and the fines are premixed in a dry condition with the coarse particles being 20% to 80% by volume of the total solids content, and then this dry premix is fed into the rotating, ball agglomerating mill together with the agglomerating liquid.
Claim 4
Dependent Claim
22 words
A method according to claim 1, wherein the coarse particles and the fines are agglomerated under a blanket of the agglomerating liquid.
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein the coarse particles and the fines are of the same substance.
Claim 6
Dependent Claim
18 words
A method according to claim 1, wherein the coarse particles are of a different substance to the fines.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |