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Solids Handling

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Selecting the Proper Mill for Your Product

Milling is a mechanistically driven process that breaks solid material into smaller pieces. Selection of the optimal mill is a daunting task that often leaves engineers relying on vendor suggestions to decide which mill is right for their job. This…

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Calculating Volumes of Bulk Solids

Calculating volumes of solids in piles as they are poured into various shaped containers can be important information for solids-handling applications. The following set of equations represents guidance to help determine solids volume in these cases. Solids in containers Solids…

Steel-belt granulation now with hygienic application features

The Rotoform G4 builds on more than 30 years’ process experience and introduces a number of features relevant to hygiene-critical applications, including easier cleaning, enhanced bearing seals and a lubrication-free drive-belt option. The core process combines the Rotoform drop depositor…

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Fundamentals of Bulk Solids Mixing and Blending

Mixing and blending of bulk solids is a common processing step in many industries. For example, in pharmaceutical manufacturing of solid dosage formulations (tablets or capsules), small amounts of a powdered active drug are carefully blended with excipients, such as…

Focus on Screening

Great Western Manufacturing All screening needs are contained in this mobile trailer The Mobile Quality Assurance Sifter (photo) is said to be ideal for inline sifting on product delivery or receipt; sifting at a trans-loading location; silo evacuation or load-out;…

An end-to-end process for flexible fertilizer production

This company has combined inline mixing with its granulation technology to help fertilizer producers add value to their products. Production begins with accurate dosing and weighing of the materials to be combined, followed by mixing and, if necessary, grinding. The…

A powder feeder is reengineered for food applications

The ProFlex F is a new hygienic version of the company’s ProFlex feeder system for applications in the food industry. Two standard versions are available for either wet or dry cleaning. They come in three different sizes (F500, F3000 and…

A thermal fines agglomerator for powder coatings

Said to be the world’s first thermal fines agglomerator, the HotCooler allows producers of powder coatings and toner to re-feed “unwanted” fine dust directly, quickly and easily as chips or flakes back into the production process, thereby significantly reducing the…

Rotary Valves in Pneumatic Conveying Systems

Rotary valves are used almost universally in pneumatic conveying systems. They serve three main functions: 1) to provide a pressure-seal (airlock) between two adjacent processes, 2) to provide solids metering (feeding) and 3) to provide a combination of solids metering…

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Solids Conveying

Dry, granular solids can be conveyed in a number of ways. Two common devices for transporting granular solids are the angular-pitch vibrating conveyor and the horizontal differential-motion conveyor. The variability in the design and performance between the two types stems…