Subject

Date Range

Author

Organization

Article Type

Search

Vacuum conveying systems transport powders and bulk solids throughout a plant, but these systems also can help achieve other benefits such as making the environment safer, reclaiming material from dust collectors, making mixer loading easier, and reducing costs. This article discusses how different vacuum conveying systems can accomplish benefits like these in your plant.
The design of an effective and safe dust capture exhaust system needs to address many factors. To make sure that occurs, you and your staff need to be very familiar with your plant’s production process. In this article, columnist John A. Constance details several steps that will help you get an effective dust capture exhaust system up and running on time and on budget.
For flooring manufacturer Forpac of Haines City, FL, keeping cement powder and calcium carbonate for thin-set flowing from 144-ton silos was proving difficult. Even hammers didn’t help, and the company was losing 7 hours of production time each week. The company called Solimar Pneumatics, which recommended installing disk-type pneumatic fluidizers at the bottom of each silo. The increased production and reduced cleaning time allowed Forpac to justify costs in just one week.
Aside from trial and error and pilot-scale studies, manufacturers tend not to have concrete methods of deciding what process equipment works best for their application. Identifying a powder’s relevant properties helps to narrow the equipment design choices because equipment differs in its suitability for different powders. This article describes three case studies where multifaceted powder characterization was critical to determining the right process equipment.
This article describes the sieving, classifying, and other types of testing that Elcan offers in its test center. A customer who needed titanium powder for 3D printing analyzed sent the company a sample. Test center staff used a variety of equipment to determine particle shape, size, and distribution, which allowed the customer to properly layer the titanium powder in its 3D printer for the best result.
This article outlines how seals work and discusses application examples of seals and bearings used with mechanical conveyors.
A cyclone’s service life is unpredictable — especially in certain applications. Erosion is one of the reasons. In this article, columnist Ray Cocco describes how to measure and reduce erosion in cyclones. He also discusses how things such as dust collection efficiency and pressure drop can be affected by erosion and other cyclone issues.
Every participant along the bulk solids production line, from raw material supplier to processor, must work to ensure that foreign contaminants aren’t present in products that reach consumers. This article discusses incorporating magnetic separators and metal detectors, as well as other best practices, to achieve the highest product purity possible and avoid costly equipment damage from tramp metals.
A water treatment plant was using pebble lime to process and reclaim more than 30 million gallons of water a day. When pneumatically conveying the lime to silos during off-loading, the abrasive material was causing frequent elbow wall failure, causing plant downtime and other issues. In search of a fix, the plant contacted HammerTek, which replaced five existing elbows with deflection elbows. The change resulted in reduced labor and maintenance costs and safer air quality in the plant.
Mixing expandable polystyrene (polystyrene beads) with additives gives them particular characteristics that are useful in a wide variety of industries. The additives typically used are often needed in very small quantities, yet achieving a homogenous bead and additive mixture is essential. This article describes how a plow-type mixer can be used to achieve the necessary bead and additive blend.
One factor that can greatly influence your dryer selection is the need to maintain or reduce your material’s particle size and shape during drying. In this article, columnist John J. Walsh describes a variety of dryers and how they can either help or hinder those efforts.
Vacuum pneumatic conveying provides safe transfer of bulk dry materials and can help maintain tight industry standards for sanitation and environmental safety.
Understanding the strengths and limitations of different types of pneumatic conveying systems can help you choose the one best suited to your application.
In this column, author Greg Mehos offers details on how particle size enlargement is often used to reduce the likelihood of unwanted powder agglomeration. This is because the likelihood of caking generally decreases when particle size increases due to the decrease in a powder’s overall cohesive strength and why he often recommends intentional agglomeration when the objective is to prevent it.
When conveying material, controlling material flow is important for many reasons, including precise measuring. Slide gates controlled by pneumatic actuators are one way to control that material flow, and a variety of control options can be added to these actuators to help with precision. This article discusses the options.
Vibratory feeders and screw feeders often can work well for the same application. When choosing between them, one consideration is the required investment. This article examines the short-term and long-term life-cycle costs of a vibratory feeder compared to a single screw feeder.
“Simple” bulk solids grinding can quickly get complicated. In this column, Willie Hendrickson points out a few situations in which grinding complications can develop. He also touches on how and why these situations can happen and how to avoid them.
Form-fill-seal (FFS) packaging equipment is prevalent in a wide variety of polyethylene bag filling applications. Both vertical and horizontal machines are available. This article describes some of the considerations that might impact the purchasing decision when choosing between the two.
In this column, author Greg Mehos explains the basic types of agglomeration mechanisms, the equipment involved, and how to choose the process most suitable for your desired end result.
Although there are a variety of factors that affect bulk solids mixing and blending, some problematic issues are common, and one is overmixing. This article explains the risks of overmixing and offers simple tips to help determine and achieve the most optimal mix cycle for your application.
Monitoring mixing processes via inline technology offers practical benefits. This article examines those benefits focusing on the technique of drag force flow measurement. Experimental studies illustrate the capabilities of the process monitoring techniques for a range of mixing and blending applications.
This sodium bentonite processing facility switched from tungsten-carbide-tipped pins in its pin mixer to versions covered in a nickel matrix cloth with tungsten carbide chips. The result has been a “significant” increase in the amount of time between pin changeouts, according to processor Black Hills Bentonite.
In this column, author John J. Walsh revisits a past discussion of typical control systems for continuous direct-contact (convection) and indirect-contact (conduction) dryers, the limitations of these control systems, and how newer technologies may be overcoming these limitations.
Wisconsin-based Jackson Concrete had been experiencing cold-weather silo backup problems when air pads aerating cement in the company’s silos would wear down and harden due to moisture. The company sought the help of Solimar Pneumatics, which installed silicone disc fluidizers to aerate the two 1,000-barrel silos. The result has been no more backups.