Tag Archives: powder flow

Perry’s Chemical Engineers’ Handbook

I own all eight editions of Perry’s Chemical Engineers’ Handbook. The ninth edition will be issued this year, and Dr. John Carson and I have written the section on bulk solids flow and hopper design. The ninth edition will include our … Continue reading

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Breaking down attrition

Sometimes attrition, the breaking down of particles, can be a really good thing – like when I wake up in the morning to the sound of coffee beans grinding just waiting for me to make a perfect cup of coffee. … Continue reading

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What’s the difference between your problematic bulk solids feeder and Michael Corleone?

Many of you may recall hearing Al Pacino’s Michael Corleone of the legendary Godfather series say, “Just when I thought I was out, they pull me back in…” We engineers at J&J can almost hear some of the problematic bulk … Continue reading

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Take two of these and you will feel better in the morning

Wouldn’t it be nice if successfully addressing powder handling challenges in the pharmaceutical industry were as easy as taking the oft-cited doctors’ advice of “take two of these and call me in the morning…” ? A little over a month … Continue reading

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Are you ready for continuous manufacturing?

Although continuous manufacturing has been used in other industries for centuries to produce products ranging from glass bottles to breakfast cereals, it is still in its infancy in the pharmaceutical industry.  This situation has often prompted the question among pharmaceutical … Continue reading

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Snowboarding vs. Skateboarding: Or a Tale of Two Friction Angles

I am excited that winter has arrived in New England. Last winter, my nephew taught me how to snowboard. I figured that I would be able to pick up the sport rather quickly. After all, I was an avid skateboarder … Continue reading

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Vibrators – Did it Work for You?

  Vibrators are commonly used in many industries as “flow aids” or “flow promoters” for bulk solids. The chronology of vibrator use often goes like this: 1) a particular bulk solid is put inside a bin without regard for the … Continue reading

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How to Lose Weight – In a Feeder

Loss-in-weight feeders are a common feature of many solids handling processes. Many vendors offer well developed, sophisticated systems that are generally easy to operate, maintenance friendly and available in a wide range of sizes to fit feed rates from a … Continue reading

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