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ASTM D 6941 Document Information:
Title
Standard Practice for Measuring Fluidization Segregation Tendencies of Powders
ASTM International
Publication Date:
Nov 1, 2005
Scope:
This practice covers an apparatus and procedure for simulating
the segregation tendencies of powders by means of the fluidization
mechanism.
Powders must be capable of being fluidized in order to be tested
by this practice.
Temperature- and humidity-sensitive powders may need to be
tested at different temperatures and moisture contents, as would
happen in an industrial environment. Further, the gas supply (type,
temperature, and humidity) should also match the industrial
conditions.
This standard is not applicable to all bulk solids and
segregation mechanisms: while fluidization is a common segregation
mechanism experienced by many fine powders, other segregation
mechanisms not evaluated by this standard might induce segregation
in practice.
The extent to which segregation will occur in an industrial
situation is not only a function of the powder and its tendency to
segregate, but also the handling equipment (for example, bin
design), process (for example, transfer rates), and
environment.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- fluidization
- powder
- segregation
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