Patent US3746265A successfully refreshed from Google Patents.
US3746265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benefication of potash
Assignee: IMC Fertilizer Inc
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Filing: 1970-10-02
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Granted: 1973-07-17
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Expires: 1990-10-02
Abstract
Abstract Potash is subjected to a rougher gravity beneficiation to remove significant amounts of halite and the overflow is subjected to a cleaner gravity beneficiation to provide an overflow concentrate. The underflow from the cleaner gravity separation is sized to provide finer particles which can be beneficiated to provide a product having a high K2O content.
Inventors
- 👤 W Dancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:10
CPC Classifications
B; B03; B03B; B03B7/00; C; C01; C01D; C01D3/00; C01D3/04; C01D3/08; B03D; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
14 words
A process according to claim 16 wherein said gravity separations are vortex gravity separations.
Claim 2
Dependent Claim
17 words
sizing said comminuted ore to provide a fraction substantially free of particles smaller than about 10 mesh;
Claim 3
Dependent Claim
42 words
subjecting said fraction to gravity separation in a liquid media having a specific gravity of separation intermediate the specific gravity of sylvite and halite whereby sylvite-containing particles are removed as an overflow fraction and halite particles are removed as an underflow fraction;
Claim 4
Dependent Claim
17 words
A process according to claim 2 wherein a magnetite-containing heavy media is employed in the gravity separations.
Claim 5
Dependent Claim
19 words
A process according to claim 1 wherein the -10 mesh particles from the process are subjected to wet beneficiation.
Claim 6
Dependent Claim
45 words
subjecting the overflow from said gravity separation of (3) to a gravity separation in a liquid media having a specific gravity of separation intermediate the specific gravity of sylvite and halite whereby a sylvite concentrate is obtained as an overflow and an underflow is obtained;
Claim 7
Dependent Claim
33 words
sizing said underflow from said gravity separation of (4) at about 4 mesh to separately provide larger particles and finer particles including a substantial number of particles having a high K2O content; and
Claim 8
Dependent Claim
13 words
A process according to claim 4 wherein the wet beneficiation is froth flotation.
Claim 9
Dependent Claim
12 words
A process according to claim 1 wherein the wet beneficiation is crystallization.
Claim 10
Dependent Claim
12 words
recycling said finer particles from (5) to the gravity separation of (3).
Claim 11
Dependent Claim
36 words
A process according to claim 1 wherein the specific gravity of separation of (3) is from about 2.10 to about 2.16 and the specific gravity of separation of (4) is from about 2.02 to about 2.06.
Claim 12
Dependent Claim
13 words
A process according to claim 7 wherein said gravity separations are vortex separations.
Claim 13
Dependent Claim
27 words
A process according to claim 1 wherein the larger particles from (5) are comminuted to about -4 mesh and are recycled to the gravity separation of (3).
Claim 14
Dependent Claim
24 words
A process according to claim 1 wherein said larger particles of step (5) are comminuted and recycled to the gravity separation of step (3).
Claim 15
Dependent Claim
69 words
A process according to claim 1 wherein said gravity separation of (3) is a vortex gravity separation at a specific gravity of separation of from about 2.10 to about 2.16; said gravity separation of (4) is a vortex gravity separation at a specific gravity of separation of from about 2.02 to about 2.06; and the larger particles of step (5) are comminuted and recycled to the sizing of (2).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |