Tracer study of batch sedimentation. [Resin beads - 45 and 62. mu. m in diameter]

Technical Report · Thu Apr 01 00:00:00 EST 1982

DOI:https://doi.org/10.2172/5194799· OSTI ID:5194799

Bigot, P. C.; Lee, A. H.

The initial particle-concentration profile in batch settling tests was assessed and determined to be uniform. Two sets of data for batch-settling tests using cobalt-57-traced ion-exchange resin beads (45 and 62 ..mu..m in diameter) were compared with existing theories and models. A single suspended-solids zone was observed in agreement with the predictions of Dixon; the Richardson-Zaki correlation predicted the settling velocity as a function of void fraction to within 5%. Studies with a bimodal particle-size distribution of equal fraction of 45- and 62-..mu..m particles showed that the larger particles settled at the same velocity as in a single-particle-size distribution but that the smaller ones settled slower than for a single-particle-size distribution at a given void fraction. The ratio of the settling velocity of the smaller particles in a bimodal-particle-size distribution u/sub b/ to the settling velocity of these particles in a single particle-size distribution u/sub s/ was correlated by raising to the (3.78 +- 0.47) power the effective void fraction of the resulting upper settling zone containing only the smaller particles.

• Research Organization: Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5194799
• Report Number(s): ORNL/MIT-341; ON: DE82013382
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RESINS
PARTICLE SIZE
SEDIMENTATION
TRACER TECHNIQUES
COBALT 57
DISTRIBUTION
EXPERIMENTAL DATA
ION EXCHANGE MATERIALS
SEDIMENTS
SLURRIES
TIME DEPENDENCE
VELOCITY
BETA DECAY RADIOISOTOPES
COBALT ISOTOPES
DATA
DAYS LIVING RADIOISOTOPES
DISPERSIONS
ELECTRON CAPTURE RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPE APPLICATIONS
ISOTOPES
MATERIALS
MIXTURES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RADIOISOTOPES
SIZE
SUSPENSIONS
400105* - Separation Procedures