Tag Archives: mass flow

Elizabeth Bittencourt da Costa presenting at Centro Universitário da FEI

  Elizabeth Bittencourt da Costa, an engineer in our Brazilian office, recently presented to the Centro Universitário da FEI during their engineering week. Here’s the course in her own words: No dia 14 de Outubro realizei uma apresentação na Semana da Engenharia do Centro … Continue reading

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I’ve had my material tested… now what?

Have you ever wondered how the data from your material testing report is being used? Take a few minutes and find out how the design of your hopper is informed by the testing of your materials in our labs!

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On a lighter note…

At Jenike & Johanson, our mission is to help clients with their bulk solids handling needs.  As part of this, I also participate in teaching courses and representing our company at trade shows and  exhibitions.  While doing these, sometimes interesting … Continue reading

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Looking At Jenike & Johanson From Many Perspectives

Originally as an employee of Apollo Technologies in 1976, and ultimately one of the founding owners of a Dallas based engineering services company (1982), Guardian Utility Services, Inc. (GUS, Inc.), I remember well discovering Jenike & Johanson’s (J&J) revolutionary “mass … Continue reading

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What’s the Number One Rule of Powder Handling?

The number one rule of powder handling is that there are exceptions to every rule! Consider wall friction. In order to achieve mass flow and prevent ratholing, the walls of a hopper must be steep enough and low enough in … Continue reading

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Evolution in the Design of Bulk Solid Handling Systems in Mining in the Last Two Decades

Last month we celebrated the 20th anniversary of Jenike & Johanson’s office in Chile (JJC). This landmark made me think about the huge change that most mining and engineering companies in Latin America have experienced in this period on the … Continue reading

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From Beaches to Silos: How a Missed Opportunity Leads to a US Patent

A few years ago I was sitting with a colleague in a conference room in Jamaica, waiting for the plant to get back online so we could inspect flow through a bauxite silo.  Not exactly a beach story!  One discussion … Continue reading

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Riddle me this… what does a hopper and lampshade have in common?

The answer to this riddle may not be obvious, but, it is quite simple…the hopper and lampshade have the same angle!  This is shown in the graphic. As with a lampshade (see “A”), a hopper must be made economically.  Consequently, … Continue reading

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