Archives :: Processing & Handling :: Solids Handling

Displaying 301 - 320 of 329 stories.
December 15, 2007
At the Chem Show last month (New York; Oct. 30 – Nov. 1), Resodyn Acoustic Mixers Inc. (Butte, Mont.; edlinks.che.com/6902-531) demonstrated its new, impeller-free mixing technology, which induces microscale turbulence through the propagation of acoustic waves. Dubbed ResonantAcoustic Mixing (RAM), the now commercially available process promises solutions for many of the complications associated with...
http://www.chemengonline.com/processing_and_handling/solids_handling/Chementator-Resodyn-Unveils-Entirely-New-Mixing-Technology-_3549.html
December 15, 2007
Scales are available in a dizzying array of types and sizes to suit different needs. Although it’s easy to default to price in order to eliminate the tedious task of researching your options, a basic knowledge of these ten key factors can help you secure the scale with the best overall value and utility for your specific application. #1: Primary Use Determining the proper style and size of the scale...
http://www.chemengonline.com/processing_and_handling/solids_handling/weighing/Solids-Processing-Weighing-Your-Options-The-10-Most-Important-Scale-Considerations_3564.html
November 15, 2007
A molecular testing method that attains a viable count of microbial organisms in as little as 4 h compared to the typical 3–14...
http://www.chemengonline.com/processing_and_handling/solids_handling/Microbial-testing_3506.html
November 15, 2007
A new process to produce titanium, called the TiRO process, has been developed by a team from CSIRO (Melbourne, Australia; edlinks.che.com/6901-538) through its Light Metals Flagship. The process is said to halve the cost of producing titanium metal components by: 1) Replacing the conventional Kroll-batch process with a more continuous process based on fluidized-bed (FB) technology; and 2) Using Ti’s...
http://www.chemengonline.com/processing_and_handling/solids_handling/A-less-expensive-way-to-produce-titanium_3512.html
October 1, 2007
Throughout the +100-year history of the chemical engineering profession, there have been numerous examples of a single individual making a breakthrough discovery or contributing a key theory to the field. The awareness of such “single-handed” contributions, however, has certainly diminished in recent years. An increasing proportion of research, even at the academic level, is sponsored by...
http://www.chemengonline.com/processing_and_handling/solids_handling/Honoring-a-bulk-solids-pioneer_3396.html
October 1, 2007
Click here for full pdf version of this article - includes all graphs, charts, tables, and author information   Explosion prevention must be a primary objective wherever the process of transferring powders into flammable solvents is utilized, irrelevant of the industry and existing practices, in accordance with regulatory guidelines such as the ATEX directives (Directive 94/9/EC, 1994 and Directive...
http://www.chemengonline.com/processing_and_handling/solids_handling/feeding_and_conveying/Prevent-Explosions-During-Transfer-Of-Powders-Into-Flammable-Solvents_3394.html
September 1, 2007
    The screening process has always been the workhorse for solid-solid separation in chemical, pharmaceutical, food, mineral processing, coal and agricultural sectors. It can be done in dry or wet mode depending on the state of the feed and desired state of the product. It serves many purposes, for example scalping, separation of fines and coarse, dewatering, de-sliming and trash removal. Some...
http://www.chemengonline.com/processing_and_handling/solids_handling/milling_grinding_and_screening/Dry-Screening-Sorting-Out-The-Basic-Concepts_3370.html
August 1, 2007
    Vessels for handling bulk solids, such as silos and bins, are frequently used to heat or cool bulk materials in cases where a slow rate of change or long residence time is required. Often, the temperature of a bulk-solids stream must be raised, for example to bring about a chemical reaction in a subsequent processing step. Alternatively, a reduction in temperature is sometimes needed, for...
http://www.chemengonline.com/processing_and_handling/solids_handling/Using-Bins-and-Silos-To-Heat-or-Cool-Bulk-Solids_3345.html
July 1, 2007
Linde Gas (Murray Hill, N.J.; edlinks.che.com/6897-538) and partners have developed a high-pressure gas-delivery system that allows coating powders to be sprayed using liquid nitrogen at temperatures that do not melt the powder particles. The system has been optimized to support a new, cold spray gun technology, called Kinetiks 4000, manufactured by CGT GmbH (Ampfing, Germany). Such a system is being...
http://www.chemengonline.com/processing_and_handling/solids_handling/coating_forming_and_agglomeration/Cold-spray-coatings_3289.html
July 1, 2007
    As the nanoparticle market continues to swell, expertise is surfacing about nanoparticle grinding and dispersion processes. A grinding solution (wet grinding with agitator bead mills) achieves the production of nanoparticles with an average fineness of 40–100 nanometers (nm). However, dispersion doesn’t always come as easily. Chemists and process engineers found that many...
http://www.chemengonline.com/processing_and_handling/solids_handling/milling_grinding_and_screening/NanoparticlesMild-Dispersion_3150.html
May 1, 2007
    A feeder for both batch and continuous operation Available in 7 models with feedrates from 1 to 550 ft3/h, the Better-Weigh Feeders (photo) are designed to provide feeding in either batch or continuous mode, depending upon the arrangement of the unit’s control electronics. In batch mode, the controller is used to control the fast (bulk) and slow (dribble) speeds of the feeder...
http://www.chemengonline.com/processing_and_handling/solids_handling/Solids-Processing_3156.html
April 1, 2007
    The world's largest pharmaceutical conference and exhibition, Interphex, will be held at the Jacob Javits Convention Center in New York from April 24-26. Approximately 1,000 global companies that serve the pharmaceutical and biotechnical industries will showcase their latest lines of equipment, technologies and services in the areas of manufacturing, sourcing and services, information...
http://www.chemengonline.com/processing_and_handling/solids_handling/Interphex-Show-Preview_3163.html
April 1, 2007
    Modeling the behavior of bulk solids has been a longstanding challenge for researchers and practitioners alike. The differences between fluids, rigid solids and bulk solids can best be illustrated by their responses to applied stress. For instance, when an external stress is applied to a fluid, it is transmitted equally in all directions. The response of a rigid solid (such as a metal bar) to...
http://www.chemengonline.com/processing_and_handling/solids_handling/bins_silos_and_storage/Modeling-Granular-Flow-Using-Discrete-Element-Method-From-Theory-to-Practice_3344.html
April 1, 2007
The conventional way to make molded ceramic compontents involves the use of an organic binder (about 10-15 wt.%) to keep the shape of the fine ceramic powders. The binder is then burned off during the sintering process; this not only requires additional energy to burn out the binder (which may also release toxic gases), but finished ceramic...
http://www.chemengonline.com/processing_and_handling/solids_handling/coating_forming_and_agglomeration/Ceramic-molding-without-binders_3235.html
March 1, 2007
    With energy costs rising, the value of most powders and bulk solids has been rising steadily as well, giving manufacturers ample reason to improve production efficiency. "Companies not only want to reduce their consumption of power, they also want to reduce product losses," says Scott Will, director of sales and marketing for Modern Process Equipment (Chicago, Ill.); "if you...
http://www.chemengonline.com/processing_and_handling/solids_handling/milling_grinding_and_screening/Increasing-Particle-Sizing-Efficiency_3321.html
February 1, 2007
    There are a variety of reasons to consider the purchase of a new tank or silo1. As organizations grow, so does the need for increased storage capacity. Meanwhile, an old tank may become corroded or worn and require replacing. Once it's determined that a new tank is needed, there are a variety of choices to consider. Whatever the end purpose, the chemical process industries (CPI) require tanks...
http://www.chemengonline.com/processing_and_handling/solids_handling/bins_silos_and_storage/Silo-Design-And-Selection_3343.html
January 1, 2007
    Chemicals, plastics, pharmaceutical, food, agricultural chemicals, coal and bio-chemical industries have a wide array of processes where the raw materials, intermediates and products are in particulate form. Hazards associated with particulate solids are unique, and in most cases depend on the particle size. The purpose of this paper is to present a systematic framework for designing...
http://www.chemengonline.com/processing_and_handling/solids_handling/Design-Safer-Solids-Processing-Plants_3118.html
November 1, 2006
    The need to transfer bulk-solids materials from the outlet of a bin or from a conveyor, to a process, truck, or another bin is ubiquitous throughout the chemical process industries (CPI). Transferring material using equipment designed to mechanically convey chemicals works quite well, especially for long distances; however, for short distances, it can be prohibitively expensive and...
http://www.chemengonline.com/processing_and_handling/solids_handling/bins_silos_and_storage/The-Dos-and-Donts-Of-Chute-Design_3114.html
November 1, 2006
    This improved planetary mill adds new safety features The premium line is a new generation of this firm's planetary mills for laboratory application (photo). Compared with traditional planetary mills, the premium line is said to provide 250% more grinding energy, says the manufacturer. The planetary mill is said to be as easy to operate as a centrifuge. The fool-proof grinding bowls are...
http://www.chemengonline.com/processing_and_handling/solids_handling/milling_grinding_and_screening/Size-Reduction-Equipment_2837.html
October 1, 2006
    Provided that they are updated when appropriate to keep them relevant, time-tested heuristics rules based upon experience, also referred to as rules of thumb, can be useful for the design, specifying and operation of several kinds of equipment used in process plants. The first and foremost heuristic rule is that the engineer should not shy away from using heuristics - and the second rule is...
http://www.chemengonline.com/processing_and_handling/solids_handling/feeding_and_conveying/Heuristics-Rules-for-Process-Equipment_2808.html
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