Solids Handling
Up to eight of these volumetric feeders can be coupled together
The volumetric version of the gravimetric ProFlex C feeder can be used to feed additives and fillers in powder, granulate or fiber form. The system requires no maintenance, and is available in two feeder sizes and three container sizes. Up…
Vacuum conveying system achieves high batch accuracy
Designed for use in the chemical, pharmaceutical and food industries, the Batch Weigh Vacuum Convey System (photo) delivers powders and granules to process vessels with accuracies of 0.5% of the batch size. This type of vacuum conveying system allows for…
This macerator features a cartridge of blades
Netzsch Mohnopumpen The Taskmaster twin-shaft macerator (photo) does not have individually installed cutting blades, but single elements made of special steel comprising six cutters and six spacing rings. To achieve the required particle size, different blade designs are available. The…
Consider Wet Agglomeration To Improve Powder Flow
Agglomeration is the process of converting fine powder particles into larger particles by the introduction of external forces. Agglomeration is often desirable because the process yields a product that has a higher bulk density, contains less dust, and has improved…
Ask the Experts: Discharging from bulk bags
Question: Should we convert from manual dumping of sacks to discharging from bulk bags? Answer: Dry, bulk chemicals have long been purchased in 50-lb (23-kg) paper and plastic sacks for several reasons. In volumes smaller than rail and truckloads,…
Mechanical Centrifugal Air Classifiers
An improved understanding of air classifier systems and their application can help in selecting the right device Mechanical centrifugal air classifiers are used extensively to process aggregates, ceramics, chemicals, foods, minerals, metals, plastics, flyash and other materials. They are normally…
Lessons in Feedstock Change
These days, there seem to be more reasons than ever to change feedstocks throughout the chemical process industries (CPI). Whether environmental, or more directly based on financial and market drivers, big benefits usually require big changes. This is especially true…
Focus on Feeding & Conveying
Feeder combines speed with accuracy Hapman The PosiPortion feeder (photo) offers a 2-in-1 feed screw option that dramatically improves batch accuracy without compromising speed. A two-speed delivery scheme, consisting of a fast turning “bulk-mode” and a slower “dribble-mode”, are used…
Using Inserts to Address Solids Flow Problems
Storage of bulk materials in hoppers, bins and silos is ubiquitous in the chemical process industries (CPI), and so are the challenges that go along with it. Flow stoppage (bridging or arching), variability in mixture composition (de-mixing or segregation), erratic…
A cross-section of insert patents
This table supports the article Using Inserts to Address Solids Flow Problems, CE, July 2010, pp. 32–37. U. S. Patents Patent # Date Title Inventors 1,731,675 Oct. 15, 1929 Sawdust Feeder McCoy, John C. 2,843,274 Jul. 15,…