All Blog Posts about ‘Question of the Week’

Question of the Week: What is the Difference Between a Rotary Kiln’s Working Layer and Insulating Layer?

This article was authored by:

Jenny Seim
Technical Writer

The “working” layer and insulating layer refer to a rotary kiln’s multiple layers of refractory. Refractory is what protects the kiln from high internal temperatures, and maintains heat retention. Sometimes it is desirable to use multiple layers of refractory, especially when higher efficiency is preferred, Continue reading →

 

Question of the Week: What Fuel Sources can FEECO’s Rotary Dryers and Kilns Work With?

This article was authored by:

Jenny Seim
Technical Writer

FEECO’s rotary dryers and kilns can accommodate numerous fuel sources. The chart below highlights the equipment and their available fuel source options: Natural Gas/Propane Fuel Oil Electricity Biomass Combustion Waste Heat Biogas Direct Rotary Dryer  x  x  x  x x Indirect Rotary Dryer  x  x Continue reading →

 

Question of the Week: How does a Rotary Kiln Dam Work?

This article was authored by:

Jenny Seim
Technical Writer

Dams are used to increase the retention time or bed depth in a rotary kiln. Material builds up behind the dam, forcing retention time and bed depth to increase. Material then spills over the dam and discharges from the rotary kiln. Since most rotary kilns Continue reading →

 

Question of the Week: What Does the Transformation of Biomass to Biocoal look Like?

This article was authored by:

Jenny Seim
Technical Writer

To process biomass into biocoal, residuals from the forest products industry are first dried in a rotary dryer to reduce the moisture content and improve combustion. Next, the dried biomass is processed in the oxygen-free environment of an indirect rotary kiln to remove volatile components. Continue reading →

 

Question of the Week: What are the Benefits of Recovering Bedding from Manure?

This article was authored by:

Jenny Seim
Technical Writer

Manure can be processed into a bedding product known as recycled manure solids (RMS). Recycled manure solids can further be processed into dried manure solids (DMS), a product with reduced moisture and pathogen content which is ideal for use as a bedding product. Bedding recovery Continue reading →

 

Question of the Week: What Materials are Commonly Micro-Pelletized?

This article was authored by:

Jenny Seim
Technical Writer

Micro-pelletizing is the process of agglomerating material fines into small pellets, or micro-pellets, from 20-60 mesh. It is can be carried out in either pin mixer, or a pin mixer/pan pelletizer setup. Pin mixers alone are ideal when only small pellets or material conditioning is Continue reading →

 

Question of the Week: What does the Transformation of Biomass to Activated Carbon Look Like?

This article was authored by:

Jenny Seim
Technical Writer

The process of converting biomass to activated carbon can vary depending on the source and characteristics of the feedstock material, and the wanted end-product characteristics. This process is outlined in the stages below: Drying. Biomass must first be dried, most often via a rotary dryer, Continue reading →

 

Question of the Week: What is Organic Combustion?

This article was authored by:

Jenny Seim
Technical Writer

Organic combustion is the thermal treatment of organic wastes with the intent of reducing mass and volume. This process is frequently seen in waste treatment plants in order to reduce the volume of organic wastes for deposit into landfill. Organic combustion leaves behind an ash Continue reading →

 

Question of the Week: What are the Benefits of Using Ceramic Proppants?

This article was authored by:

Jenny Seim
Technical Writer

Proppants are hard microspheres that are injected into well bores to “prop” open rock fissures, allowing oil and natural gas to flow out. While frac sand is the most commonly used proppant, ceramic proppants offer a tailored solution in demanding drilling settings. Greater crush strength. Continue reading →

 

Question of the Week: What is the Difference Between a Pin Mixer and a Pug Mill?

This article was authored by:

Jenny Seim
Technical Writer

Pin mixers and pug mills are industrial mixing devices with each offering their own distinct advantages and capabilities. Oftentimes, the material itself dictates which piece of equipment is best for the operation at hand. Pug mills are used for mixing, agglomerating, and conditioning. They utilize Continue reading →