Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:7032153

Yoon, R H; Adel, G T; Luttrell, G H

A method and apparatus are disclosed for the microbubble flotation separation of very fine particles, especially coal, so as to produce a high purity and large recovery efficiently. This is accomplished through the use of a high aspect ratio flotation column, microbubbles, and a countercurrent use of wash water to gently wash the froth. Also, disclosed are unique processes and apparatus for generating microbubbles for flotation in a high efficient and inexpensive manner using either a porous tube or an in-line static generator. 23 figures.

• DOE Contract Number: FG22-83PC60806
• Assignee: Virginia Tech Intellectual Properties, Inc., Blacksburg, VA (United States)
• Patent Number(s): US 4981582; A
• Application Number: PPN: US 7-148871
• OSTI ID: 7032153
• Resource Relation: Patent File Date: 27 Jan 1988
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
DEASHING
FLOTATION
AERATION
BUBBLES
COAL PREPARATION
DESIGN
MATERIALS HANDLING EQUIPMENT
SEPARATION EQUIPMENT
CARBONACEOUS MATERIALS
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
MATERIALS
SEPARATION PROCESSES
010300* - Coal
Lignite
& Peat- Preparation- (1987-)