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Title: Method for simultaneous use of a single additive for coal flotation, dewatering, and reconstitution

Abstract

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.

Inventors:
 [1];  [2];  [3]
  1. Murrysville, PA
  2. Pittsburgh, PA
  3. Finleyville, PA
Issue Date:
Research Org.:
Pittsburgh Energy Technology Center
OSTI Identifier:
869694
Patent Number(s):
5379902
Assignee:
United States of America as represented by United States (Washington, DC)
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; simultaneous; single; additive; coal; flotation; dewatering; reconstitution; dose; contributes; consecutive; fine; unit; operations; whereby; combined; water; predetermined; proportion; formulate; slurry; mixed; heavy; hydrocarbon-based; emulsion; mixing; speed; period; time; conditioned; cleaned; froth; form; clean; dewatered; vacuum; filtration; centrifugation; process; reconstituted; products; dried; dust-less; clumps; prior; combustion; predetermined period; unit operations; predetermined proportion; froth flotation; fine coal; heavy hydrocarbon; unit operation; clean coal; coal flotation; flotation method; /209/210/252/

Citation Formats

Wen, Wu-Wey, Gray, McMahan L, and Champagne, Kenneth J. Method for simultaneous use of a single additive for coal flotation, dewatering, and reconstitution. United States: N. p., 1995. Web.
Wen, Wu-Wey, Gray, McMahan L, & Champagne, Kenneth J. Method for simultaneous use of a single additive for coal flotation, dewatering, and reconstitution. United States.
Wen, Wu-Wey, Gray, McMahan L, and Champagne, Kenneth J. Sun . "Method for simultaneous use of a single additive for coal flotation, dewatering, and reconstitution". United States. https://www.osti.gov/servlets/purl/869694.
@article{osti_869694,
title = {Method for simultaneous use of a single additive for coal flotation, dewatering, and reconstitution},
author = {Wen, Wu-Wey and Gray, McMahan L and Champagne, Kenneth J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

Patent:

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