Method for simultaneous use of a single additive for coal flotation, dewatering and reconstitution
Patent Application
·
OSTI ID:204717
A single dose of additive contributes to three consecutive fine coal unit operations, i.e., flotation, dewatering and reconstitution, whereby the fine coal is first combined with water in a predetermined proportion so as to formulate a slurry. The slurry is then mixed with a heavy hydrocarbon-based emulsion in a second predetermined proportion and at a first predetermined mixing speed and for a predetermined period of time. The conditioned slurry is then cleaned by a froth flotation method to form a clean coal froth and then the froth is dewatered by vacuum filtration or a centrifugation process to form reconstituted products that are dried to dust-less clumps prior to combustion.
- Research Organization:
- USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A8149270
- Application Number:
- ON: DE96005169; PAN: 8-149,270; NC: NONE
- OSTI ID:
- 204717
- Resource Relation:
- Other Information: PBD: 9 Nov 1993
- Country of Publication:
- United States
- Language:
- English
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