Powder Mixing

Powder Blending
Solids Mixing
Solids Blending

Section summary
This index gives access to all knowledge interesting to Process Engineers in the field of Dry Mixing

Powder Mixing
Types of mixers
Mixing mechanisms
Mixing time
Mixing speed
Mixing volume
Mixing power
Mixer loading
Discharge time
Froude Number
Coefficient of Variation
Homogeneity
Tracer
Segregation / demixing
Tip speed
Sampling
ATEX speed
Mixer Bearing seals
Mixer discharge valve

Dry Mixing of powder and solids – Types of mixers

Main types of mixers used for solids and powder blending

Dry Mixing of powder and solids – Mixing mechanisms

Diffusive mixing, convecting mixing, shear mixing

Dry Mixing of powder and solids – Mixing time

Expected mixing time for each mixer type

Dry Mixing of powder and solids – Mixing speed

Usual mixing speed for each mixer type

Dry Mixing of powder and solids – Minimal Nominal and Maximum volume

Differences in between minimal, nominal and maximum volume of dry-mixers, typical values

Dry Mixing of powder and solids – Power consumption

Typical mixing power consumption for each mixer type

Dry Mixing of powder and solids – Loading sequence

How loading sequence impacts mixing efficiency

Dry Mixing of powder and solids – Discharge time

Typical discharge time for each mixer type

Dry Mixing of powder and solids – Froude number

Calculation of Froude number, physical interpretation for mixing, usual values

Dry Mixing of powder and solids – Coefficient of variation

Calculation of the coefficient of variability of a mixture, mathematical representation of the homogeneity

Dry Mixing of powder and solids – Homogeneity

What means having a good homogeneity

Dry Mixing of powder and solids – Tracer

Typical tracers and how to chose tracers

Dry Mixing of powder and solids – Segregation and Demixing

Dry Mixing of powder and solids – Mixing tool tip speed

Calculation of the agitator tip speed

Dry Mixing of powder and solids – Sampling

Sampling methods

Dry Mixing of powder and solids – ATEX speed

Meaning and calculation of the ATEX speed of a mixer

Dry Mixing of powder and solids – Mixer access

Different designs for accessing mixers

Dry Mixing of powder and solids – Mixer bearing seals

Design of mixer bearing seals for ATEX compliance

Dry Mixing of powder and solids – Mixer discharge valve

Different designs for mixer discharge valves




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