Rotary kilns use high temperatures to cause a chemical reaction or physical change in a material. In most cases, these high temps would destroy an unprotected carbon steel shell, and for that reason, refractory is used. Direct-fired rotary kilns employ refractory; indirect-fired kilns do not. …
Direct and indirect-fired rotary dryers are used in a variety of industrial settings to dry bulk solids. While the two are both comprised of a rotating drum and function to reduce a material’s moisture, several differences between direct and indirect dryers exist: Operation: direct-fired dryers …
Rotary dryer shells can be constructed from a variety of materials, including: Carbon steel Stainless steel Hastelloy Inconel And other alloys Dryer shells can also be tailored in many ways, depending on the material and process requirements of the customer. For example, shell thickness can …
Within the thermal processing industry, there are two informal types of rotary kilns: commodity kilns and specialty kilns. Commodity kilns are kilns that are employed in widespread commercial use. Their processes are well developed, and have been in use for generations of commodity processing. Specialty …
Rotary kiln air flow configuration is an important consideration in kiln design. Counter current and co-current are the different types of air flow options available, each offering distinct advantages and disadvantages. In co-current air flow configuration, the material and process gas flow in the same …
Agglomeration, the process of particle size enlargement, is used to solve material problems and improve product characteristics. In general, agglomerating a material can offer many benefits, including: End product benefits– dust-free product handling, and improved product characteristics. Ex: The agglomeration of cattle manure …
Rotary kilns, an advanced type of thermal processing equipment, are used to cause a chemical reaction or physical change in a solid material through the use of high temperatures. They are frequently utilized to carry out the following processes: Calcination– the process of heating a material …
In regards to rotary dryer use, retention time is the duration of time that a material must remain in the dryer to achieve the desired end-product characteristics. Retention time is an important consideration to the dryer design, and is defined by looking at the specific …
The use of agglomeration to solve material problems and improve material characteristics has made its way into numerous industries around the globe, with new applications continually on the rise. A list of industries, and some of the materials commonly agglomerated in them, include: Ag Chemicals …
Bed disturbers are used in both direct and indirect-fired rotary kilns to promote uniform heating of the material. The bed of material should roll, not slide, throughout the kiln in order to expose fresh material to the process. This rolling action allows for even heat …