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Title: Characterization of multiphase fluid flow during air-sparged hydrocyclone flotation by X-ray CT. Thirteenth quarterly report: 14 August--13 November, 1993

The research activities during this quarter of the DOE project, {open_quotes}Characterization of Multiphase Fluid Flow During Air-Sparged Hydrocyclone Flotation{close_quotes}, involved a detailed parametric study of the flotation response of the ASH, establishing an empirical correlation between flotation response and operating variables, and development of a phenomenological description of the observed responses. In these experiments with quartz particles, flotation response is essentially characterized by recovery of the solids to the overflow. Dimensionless variables such as the ratio of overflow opening area to underflow opening area, the ratio of air flow rate to slurry flow rate, percent solids in the feed suspension, particle size, inlet velocity (i.e. slurry pressure) are all of paramount importance. A series of experiments were designed to systematically study the effects of these variables on the flotation response. The radial density distribution profiles obtained from x-ray CT measurements (presented in earlier quarterly reports) reflect the fluid flow behavior of the ASH to a great extent. Based on the results of the experimental tests an empirical model has been developed correlating recovery with the operating variables.
Authors:
Publication Date:
OSTI Identifier:
10118040
Report Number(s):
DOE/PC/90311--13
ON: DE94005758; TRN: 94:001592
DOE Contract Number:
FG22-90PC90311
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 16 Nov 1993
Research Org:
Utah Univ., Salt Lake City, UT (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 01 COAL, LIGNITE, AND PEAT; SLURRIES; FLUID FLOW; QUARTZ; FLOTATION; PROGRESS REPORT; FLOW MODELS; COMPUTERIZED TOMOGRAPHY; SOLIDS FLOW; LIQUID FLOW; FLUID MECHANICS; X RADIATION; WATER; SPARGERS; AIR FLOW; CYCLONE SEPARATORS; PARAMETRIC ANALYSIS 420400; 013000; HEAT TRANSFER AND FLUID FLOW; TRANSPORT, HANDLING, AND STORAGE