Welcome to

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PowderProcess.net

Online handbook for Engineers working with powders and bulk solids

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Your site of reference for Powder and Solids processing

Discover below the content of the free online handbook

What is www.PowderProcess.net ?

www.PowderProcess.net is a free online handbook giving explanations, design methods and operational tips on the most common unit operations and equipment found in Industries processing powders.

It gives materials for Engineers who, around the world, have to design, operate or troubleshoot a powder handling process.

Would you be a confirmed Engineer, a new graduate looking for information on the process he has 1st to work on, or a student, please access below articles on unit operations and equipment that, we hope, will be useful for you. www.PowderProcess.net also hosts Process Engineer's Tools, a new online ressource for Process Engineers, not limited to Powder Processing - This subsite is still in development.

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

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PowderProcess.net Site content

Powder properties and flow Handbook	Introduction to unit operations	Equipment handbook
# Powder Properties # Flow of solids # Mass and funnel flow silos # Arches / bridges and ratholes in silos # Particle density # Bulk Density # Skeletal density # Particle Size Distribution (PSD) # How to solve flow problems in silos # How to calculate the discharge rate of silos	# Mixing [ES] [FR] # Froude number # Homogeneity # Segregation (demixing) # Dosing and weighing # Pneumatic Conveying # Solid Gas Separation # Grinding and Milling # Solid Liquid Suspension # Checking (sieve and magnets) # Filling # Safety	# Bag Tipping Stations # Big Bag Tipping Stations # Cyclones design guide # Magnets # Vibrating Sieve # Airlock rotary Valve # Conveying Pipe # Blowers # Pipe Diverters # Filters # Rotary Valves (pneumatic) # Vibrating Tube # Screw Conveyor # Load Cells # Mixers # Paddle Mixers # Ribbon Blenders # Shear / Centrifugal Mixers # Bin Tumbler mixers # V Blenders # FIBC and IBC

Mixing Handbook	Pneumatic Conveying Handbook	Safety Handbook for bulk handling processes
# Coefficient of Variation (homogeneity) # Mixer discharge time # Froude number # Mixer ATEX speed # Mixer Loading # Tip speed # Mixing principles # Mixing time # Mixing volume # Mixing Power consumption # Mixing speed # Mixing cycle time # Powder Mixing Troubleshooting Guide # Continuous mixing # Comparison Batch and Continuous Dry-Mix # Best Powder Mixer # Loss in weight feeding	# Types of pneumatic transport # Conveying phases # Dilute Phase transport # Dense Phase transport # Air mover # Roots Blower # Roots Blower performance curve # After Cooler # Airlock Rotary Valve # Product inlet / Injector # Piping # Filters # Pick-up velocity # Saltation velocity # Choking velocity # Conveying speed / velocity # Air volumetric and mass flowrate # Pipe Equivalent Length # Solids particle velocity in pipe # Bends # Solids Breakage # Pressure drop calculation # Shortcut calculation Pressure drop dilute phase # Published calculation models for dilute phase conveying # Calculation of dense phase pneumatic conveying lines #Pipe Diameter or Bore # Design methods dilute phase # Design methods dense phase # Solids Loading Ratio # Pipe Blockage # Powder Build-up # Selecting dilute or dense phase # Blower power required # Horizontal Conveying # Vertical Conveying	# Dust explosion physical properties # MIE - Minimum Ignition Energy of dust # MIT - Minimum Ignition Temperature of dust # SIT - Self Ignition Temperature of dust layers # MEC - Dust Minimum Explosive Concentration # Powder resistivity # Characteristics of dust explosion Pmax and Kst # Factors influencing dust explosions # ATEX dust explosion : zones classification # Ignition sources of dust cloud # Bulk powder electrostatics hazards # Dust explosion risks due to mechanical sparks or hot spots # Dust explosion risks due to welding and cutting activities # Electrical equipment in ATEX dust explosion zones # Good housekeeping, avoid secondary explosions # Dust explosion prevention and mitigation # Dust explosion venting # Dust explosion isolation # ATEX dust explosion risk assessment # ATEX safety of milling systems # ATEX safety of pneumatic transport systems # Big Bag Handling Safety # Rotary Equipment Safety

Energy Savings	Spray Drying handbook	Milling handbook To come soon
# Energy savings tips	# Introduction to spray drying # Stages of spray drying # Spray drying chamber configuration

Process Engineer's Tools (beta)

Process Engineer's Tools is a subsite of www.powderprocess.net widening the ressources available to the whole Process Engineering art. The subsite is still in development, new pages are uploaded every month !

Pumps	Piping	Compressors
# Pump performances - characteristics # Pump performances - modification of the characteristics # Pump Head # Pump Power # Pump NPSH # Cavitation # Pump operation in parallel or series # Pump full torque load # Minimum flow centrifugal pump # Temperature rise in pumps	# Friction factor - Churchill equation # Friction factor - Colebrook equation # Fanning and Moody friction factor # Flow Regime # Fluid Velocity # Restriction Orifice calculation # Equivalent length valves and fittings # K coefficients valves and fittings # Hydraulic Diameter # Hydrostatic Pressure # Torricelli formula # Reynolds Number # Friction factor # Pipe pressure drop calculations # Valves CV # Valves flow characteristics # Partially filled pipe # Safety Valve sizing - Gas flow # Conversion Cv and Kv flow coefficients	# Compressors power # Compressor temperature elevation # Reciprocating compressors capacity # Sound velocity calculation # Compression ratio, pressure and flow coefficient