US3665066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of coals
Assignee: Canadian Patents and Development Ltd
•
Filing: 1969-11-28
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Granted: 1972-05-23
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Expires: 1989-11-28
Abstract
Abstract A process for producing a balled coal product from coal fines involves mixing a bridging liquid with coal fines and agitating the formed mixture in an aqueous medium to cause agglomeration of the coal particles. The coal particle agglomerates are then at least partially de-watered and fed to a balling device, together with a balling nuclei of coarse coal particles and binding oil to form a balled product in which each ball comprises at least one balling nucleus in association with coal particles derived from the agglomerates. The balled coal product is moved from the balling device when formed.
Inventors
- 👤 Charles E Capes
- 👤 Allan E Mcilhinney
- 👤 Richard D Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:18
CPC Classifications
C; C10; C10L; C10L5/00; C10L5/02; C10L5/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
20 words
A process as claimed in claim 1 wherein the coal fines predominantly comprise particles not smaller than 200 mesh size.
Claim 2
Dependent Claim
40 words
A process as claimed in claim 1, wherein the coal fines comprise hydrophobic coal particles and hydrophilic ash particles and the bridging liquid is a hydrocarbon oil which preferentially wets the coal particles while leaving the ash particles substantially unwetted.
Claim 3
Dependent Claim
22 words
A process as claimed in claim 3 wherein the bridging liquid is selected from the group consisting of fuel oil and kerosene.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 3 wherein the amount of bridging liquid is from 20 to 70 percent by weight of the total of binding oil and bridging liquid used.
Claim 5
Dependent Claim
24 words
A process as claimed in claim 1 wherein the balling nuclei are coal chips having an average diameter of fRom 1 to 5 millimeters.
Claim 6
Dependent Claim
16 words
A process as claimed in claim 23 wherein the binding oil is Bunker C fuel oil.
Claim 7
Dependent Claim
31 words
A process as claimed in claim 1 wherein the amount of binding oil is from 30 to 80 percent by weight of one-half total of binding oil and bridging liquid used.
Claim 8
Dependent Claim
24 words
A process as claimed in claim 1, wherein the balling device is provided with suction means for removing excess water from the balling device.
Claim 9
Dependent Claim
29 words
A process as claimed in claim 1, wherein the balled coal product leaving the balling device is dried to a moisture content of at most half percent by weight.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |