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
Do you have a question, a remark ? Please contact the author at powder.process@protonmail.com

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

Mixing mechanisms

Diffusive mixing, convecting mixing, shear mixing

Mixing time - Calculate and improve mixing time

Expected mixing time for each mixer type

Mixing speed

Usual mixing speed for each mixer type

Minimal Nominal and Maximum volume - Increase mixer capacity

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

Power consumption

Typical mixing power consumption for each mixer type

Loading sequence Batch mixers

How loading sequence impacts mixing efficiency

Discharge time - Improve discharging time of mixer

Discharging time profile, optimization and typical discharge time for different types of outlet

Froude number

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

Coefficient of variation - How to calculate homogeneity of a dry-mix

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

Homogeneity

What means having a good homogeneity

Tracer

Typical tracers and how to chose tracers

Segregation and Demixing

Mixing tool tip speed

Calculation of the agitator tip speed

Sampling

Sampling methods

ATEX speed

Meaning and calculation of the ATEX speed of a mixer

Mixer access

Different designs for accessing mixers

Mixer bearing seals

Design of mixer bearing seals for ATEX compliance

Mixer discharge valve

Different designs for mixer discharge valves




Do you want to know more ?
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QUALITY of MIX / MEASURING DEGREE OF MIXING
All you need to know about measuring the degree of mixing (Coefficient of Variation) of a dry mix
SEGREGATION OF POWDERS / DEMIXING
All on the physical phenomena causing segregation of particles and how to avoid them
GRINDING and MILLING
All on main size reduction processes, key equipement, design consideration..etc..
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All on powder key physical characteristics, among others : flowability, density...etc..
EQUIPMENT HANDBOOK
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