Refractory is specific to direct-fired rotary kilns, insulating and protecting the shell of the drum from high internal temperatures; they also function to maintain heat retention. Many types of refractory exist, with the most common options being brick or castable. Brick is typically used for …
Pin mixers and pugmill mixers 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 …
Rotary drum tires and trunnion wheels can become worn over time, and result in the following changes: The characteristics mentioned above can cause the weight of the drum to be unevenly distributed, which in turn, can affect other drum components. Premature equipment failure can then …
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 …
Rotary dryers and rotary kilns share similar thermal processing functions, but each is intended for very different industrial applications. Rotary dryers operate at inlet temperatures between 600 and 1400ยบF, and are predominately used to draw moisture out of a material. Rotary kilns, on the other …
Simply stated, hygroscopic materials absorb moisture, whereas hydrophobic materials do not absorb moisture from the environment. Knowing which category a material falls under plays an important role in our work in the Innovation Center; it affects the way in which a material is both stored …
Rotary dryer misalignment is oftentimes the result of improper base installation. Misalignment in the base will quickly spread through the rest of the drum, causing wear and damage to other drum components. In addition, misalignment can occur naturally over time as part of normal rotary …
Attrition transpires when agglomerates break down into fines- an undesirable occurrence that results in excess dust and waste product. It is commonly seen with granules produced via compaction granulation, and is caused by the rough, jagged edges rubbing against one another and wearing down the …
Pelleting and pelletizing are two terms often used interchangeably, though their processing methods do differ. Pelleting commonly refers to the extrusion process, where cylindrical pellets are formed by forcing material through a die. It is most often used with wood, fuel and feed products (such …
Flights, also known as โfinsโ or โmaterial lifters,โ are commonly used in both rotary dryers and coolers to maximize heat transfer between the material and the drying or cooling air. Affixed to the interior of the drum, they pick up the material as the drum …