Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Rapid flotation using a modified bubble-injected hydrocyclone and a shallow-depth froth separator for improved flotation kinetics.

Authors
Jordan-CE; Susko-FJ
Source
Miner Eng 1992 Oct-Dec; 5(10-12):1239-1257
NIOSHTIC No.
10011565
Abstract
As part of the U.S. Bureau of Mines' efforts to improve the efficiency of the United States' domestic minerals industry, the Bureau has developed a rapid froth flotation system which divides flotation into two discrete unit operations: bubble-particle attachment and bubble-pulp separation. A modified bubble-injected hydrocyclone developed by the Bureau of Mines was used as the bubble- particle attachment unit which mixed a bubble slurry with an ore slurry under highly turbulent conditions. Then the mixture immediately flowed into a relatively quiescent froth separation unit where the bubbles quickly separated from the ore pulp. A shallow- depth froth separator was used to minimize the rising distance required to recover even the smallest size bubbles (100 um) and to quickly recover the mineral laden bubbles. The tailings pulp only remained in the froth separator long enough to recover the bubbles and then exited through the conical bottom. Combining these two units, a rapid flotation system was formed that successfully floated silica from phosphate in one-ninth of the retention time for conventional mechanical cells and floated coal from ash in one- eighteenth of the retention time for conventional mechanical cells. The hydrodynamics of the rapid flotation system along with fundamental parameters for scale-up are presented in this paper.
Keywords
Hydromechanics; Hydrokinetics; Mineral-processing; Silicates; Phosphates; Coal-processing
CODEN
MENGEB
CAS No.
7631-86-9
Publication Date
19921001
Document Type
Journal Article
Fiscal Year
1993
NTIS Accession No.
NTIS Price
Identifying No.
OP 242-92
Issue of Publication
10-12
ISSN
0892-6875
NIOSH Division
TURC
Source Name
Minerals Engineering
State
AL
TOP