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Title: Apparatus for the separation of hydrophobic and hydrophilic particles using microbubble column flotation together with a process and apparatus for generation of microbubbles

An apparatus is disclosed for the microbubble flotation separation of very fine and coarse particles, especially coal, and minerals so as to produce high purity and high recovery efficiency. This is accomplished through the use of a flotation column, microbubbles, recycling of the flotation pulp, and countercurrent wash water to gently wash the froth. Also disclosed are unique processes and apparatus for generating microbubbles for flotation in a highly efficient and inexpensive manner using either a porous tube or in-line static generators. 14 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
27694
Assignee:
Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States); Virginia Tech Intellectual Property, Inc., Blacksburg, VA (United States) PTO; SCA: 010300; PA: EDB-95:054864; SN: 95001354423
Patent Number(s):
US 5,397,001/A/
Application Number:
PAN: 7-982,890
Contract Number:
FG22-83PC60806
Resource Relation:
Other Information: PBD: 14 Mar 1995
Research Org:
Virginia Polytechnic Institute and State University
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; SEPARATION EQUIPMENT; DESIGN; COAL; FLOTATION; DEASHING; COAL PREPARATION; PARTICLE SIZE; BUBBLES; OPERATION