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Solids Handling

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Facts at your Fingertips: Redefining the Kilogram Standard

The kilogram is the last of the SI units (International System of Units) still defined by a physical object, rather than defined in terms of universal fundamental constants of nature. However, this will change in November 2018, as a multi-year…

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Selection of Silos for Bulk Storage

To determine what kind of storage silo is best for your site and your materials, begin by answering the following five questions Selecting a silo for your bulk-solids storage needs isn’t like picking out a pair of socks. It’s a…

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Facts at your Fingertips: Pneumatic Conveying Flow Patterns

Pneumatic conveying is a ubiquitous mode of conveying bulk solids in a wide range of industries, including chemicals, plastics, grain, food, agriculture, mining, power generation and cement, among others. The flow patterns within conveying lines depend on the properties of…

Recently Published Books for the CPI: May 2018

The following recently published titles may be relevant for chemical process industries (CPI) professionals: Biomass as Renewable Raw Material to Obtain Bioproducts of High-Tech Value. Edited by Valentin Popa and Irina Volf, Elsevier Press, 2018, e-book, $31.50 per chapter. Dealing…

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Robotic device removes catalyst from reactors remotely

A remote-operated, screw-propelled (amphirol) machine equipped with a vacuum hose can remove solid catalyst material from reactors robotically, allowing plants to avoid subjecting personnel to enclosed work environments and inert atmospheres. Currently, catalyst changeout requires personnel to work inside process…

Preventing Flow Stoppages in Powder Handling Processes

Predicting powder flow behavior is important to successful solids-handling processes. Provided here is a review of shear-cell testing and how the technique can be used to predict arching, ratholing and other behaviors The phrases “failure to discharge” and “erratic flow…

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Taking Representative Samples in Solids-Handling Processes

Non-representative sampling in solids processes has costly consequences. A better understanding of the mathematical basis for sampling and of acceptable quality levels can help to alleviate potential sampling issues and more closely approximate reality Effective sampling in solids-handling processes is…

Size Reduction: Improving the Daily Grind

New milling, grinding and size-reduction equipment helps processors obtain better efficiencies and develop new products Although milling and size-reduction equipment may be mature — some technologies date back to the 1800s — evolving needs of chemical processors, including the demand…

Facts at your Fingertips: Agglomeration and Granulation

Agglomeration and granulation are used to achieve a wide range of objectives in solids-handling processes, including to ensure a desired particle-size distribution, minimize segregation, and improve solids flow, as well as to control de-aeration and compaction behavior and attrition resistance…

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Powder and Bulk Solids Handling: Particle Size and Distribution Analysis

The size and size distribution of particles are important determining factors in the design and operation of many process operations involving dry particles and powders. Follow this guidance to understand the impact of these key characteristics  Bulk solids are dry…