Why Is Powder Mixing so Difficult?

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• Webinar Summary
• Hear from the Experts
• Support & Troubleshooting
• Questions?


 Webinar Summary: 

The purpose of this webinar is to help engineers and scientists recognize problems with powder mixing.  Some problems are easily solved with simple adjustments to fill level or blend time.  Other problems involve the effects of certain design features of the mixing equipment.  Most powder processing problems are because the physical processes of mixing are not well understood.

The basic objective of the course is learning how to make the best use of existing powder mixers.  All opportunities should be explored and any improvements made to existing equipment before considering other types of mixers.  Changing mixers will always create some new problems.  An unbiased description of different types of powder mixing equipment is useful, but evaluation and testing of different mixing equipment is always recommended.

Understanding powder properties does not necessarily predict mixing success, but powder properties may explain why problems exist.  All powder mixers will work, but only for certain types of powders and applications.

 
 

Viewers Will Learn:

  • The differences between liquid and powder mixing
  • Answers to the most common questions about powder mixing:
    • How long do I need to blend?
    • How do I know if I have a uniform blend?
    • How should I use the blender I have?
    • Would a different type of blender work better?
  • Some common problems with powder mixers:
    • The mixer is overfilled
    • Blending runs too long
    • Wrong type of mixer
  • More about some common types of powder mixers:
    • Tumble blenders
    • Horizontal blenders
    • Rotating screw blenders
    • High intensity blenders
 

Who Should Attend:


  • Engineers, scientists, and technicians who do powder mixing in process applications will learn about some difficulties with powder mixing.
  • People who have problems with powder mixing will learn about common problems and ways to improve mixing.
  • Engineers, and scientists who have new responsibilities for mixing processes or those who have existing process problems.
  • Technical people who are familiar with only one or two types of powder mixers may learn about other types of mixers that would work better for their processes.

 

Hear from these experts: 


 
 

Dave S. Dickey, Ph.D.
Senior Consultant
MixTech, Inc.

David Dickey started his own consulting business called MixTech, Inc. in 1998. Since then he has done independent consulting work to solve process and mechanical problems with various types of mixing equipment. Several companies have had him write specifications for new mixers or evaluate existing mixers. He teaches short courses on liquid mixing, powder blending, mixing scale-up, and advanced mixing through the Department of Engineering Professional Development, University of Wisconsin, Madison. He has also served as an expert witness in important litigation cases involving mixing equipment.

Before starting his consulting business he had more than thirty years experience with manufacturers of various types mixing equipment, including almost fifteen years experience with Chemineer, a major manufacturer of fluid agitation equipment in Dayton, OH. He coauthored articles in the Refresher Series on Liquid Agitation that they published in Chemical Engineering magazine in 1975 and 1976. As Technical Director for Chemineer, he did customer seminars, developed mixer design procedures for new processes, aided in customer lab tests with scale-up to process size mixers, and helped develop their successful HE-3 hydrofoil impeller. During other parts of his career at Chemineer he managed technical sales and product engineering.

David also worked for Patterson-Kelley in East Stroudsburg, PA, an important manufacturer of dry-solids mixers and other chemical process equipment. He designed and marketed pilot plant reactors and systems for American Reactor Corporation. He also worked for Robbins & Myers with technical and management responsibility for their Prochem Mixers division. His diversity of experience has helped him understand the importance of mixing to the overall success of many chemical and biological processes.

David Dickey received his B.S. degree in Chemical Engineering from the University of Illinois at Urbana, Il.  He completed his M.S. and Ph.D. degrees in Chemical Engineering at Purdue University in West Lafayette, IN.  Because of his long involvement with process equipment, he has developed a practical background in many disciplines of mechanical engineering.  He is a fellow of the American Institute of Chemical Engineers (AIChE) and is a past president of the North American Mixing Forum (NAMF).  He is also a member of the American Chemical Society (ACS) and American Society of Mechanical Engineers (ASME).  He has authored or coauthored more than thirty technical publications on various aspects of mixing.

 

   

 

Moderator:


 
  Scott Jenkins
Senior Editor
Chemical Engineering magazine

 

Scott Jenkins has been an editor at Chemical Engineering since 2009. Prior to joining CE, Scott worked in various capacities as a science journalist and communications specialist, reporting and writing on a variety of sectors, including chemical processing, biotechnology, pharmaceutical manufacturing and research policy. He also has industry experience as a quality assurance chemist and research experience as a synthetic organic chemist. Scott holds a bachelor's degree from Colgate University, and a master's degree in chemistry from the University of North Carolina at Chapel Hill.

   



 

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1
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Support & Troubleshooting


What support is available for users on Macintosh and Unix/Linux-Based operating systems?
This presentation incorporates advanced multimedia features that allow elements such as slides, polling questions, surveys, and application demonstrations to be dynamically sent to the audience synchronized with the presentation. Mac and Linux audiences may view the presentation using a supported Firefox Web browser and Adobe Flash playerPlease note that some presentations may not feature a Flash option. 

Why can't I hear audio?

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It is common to have one or more pop-up blockers that you may be unaware of. Most pop-up blockers reside either in the system tray (lower right hand corner of your screen by the clock) or as a toolbar in Internet Explorer (at the top of your browser, go to "View" and then "Toolbars"). These can be disabled in their options or preferences menus. (Common toolbars such as Google and Yahoo Companion have built in pop up blockers). 

Also, if you are unaware of any other pop-up blockers that are running on your computer, you may want to see if you have personal firewall software running, such as Norton's Internet Security or ZoneAlarm. If you have either of these, they will also block pop-up windows. 

Where can I download the latest streaming media players?

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I occasionally hear a clicking noise during the presentation. How do I turn it off?

  • Windows 7 - Click on the Windows Start icon, then choose "Control Panel" > "Sound," > "Sounds" tab. Scroll down the "Program" menu until you reach "Start Navigation." Set the sound to [None] and click "OK." The clicking will be disabled.
  • Windows Vista - Click on the Windows Start icon, then choose "Control Panel" > "Sound," > "Sounds" tab. Scroll down the "Program" menu until you reach "Start Navigation." Set the sound to [None] and click "OK." The clicking will be disabled.
  • Windows XP - You can disable this noise by going to the Start menu, then "Control Panel". Open "Sounds and Audio Devices," and click the "Sounds" tab. Scroll down the "Program Events" menu until you reach "Start Navigation." Set the sound to [None] and click "OK." The clicking will be disabled.
Why do I get a "connection failed" or "connection blocked" message when I try to view Adobe Flash streams?

In addition to having a properly installed Adobe Flash Player your pc must permit rtmp (over port 1935) and / or rtmpt (over port 80) live streaming protocols. Please contact your local IT Administrator if you are unsure of your settings. IT Admins can click here to review additional information on configuring proxy servers to permit live Flash streaming. 


Questions?


Please contact Cristane Martin, Marketing Manager, at cmartin@accessintel.com

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