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, …
Agglomeration drums (also known as agglomerators) are a type of non-pressure agglomeration equipment. They are often selected for their heavy-duty construction, high capacity tolerances, and their versatility to accept variance in feedstock. Here’s how they work: material and binder are fed into the cylindrical rotary …
Sintering is the process of heating a material to a point just before melting via a rotary kiln. The objective here is to use the high internal temperature of the rotary kiln to increase the strength of the material. The most common use of this …
The spray system on a disc pelletizer is critical to the success of the overall agglomeration process. The spray system dispenses the binding agent onto the material fines as the disc rotates. If not properly maintained, product quality can be easily affected, and process upsets …
Pelletization, a non-pressure method of agglomeration, is an effective process for many materials, offering a variety of economic, environmental, and product benefits. The list below highlights several materials capable of pelletization: Agricultural chemicals: pesticides, fertilizers, herbicides, minerals. Ceramics: catalyst, alumina, frits. Chemicals: detergents, pigments, dyes, industrial carbons. …
Binder selection is dependent upon a few key factors: cost, industry, and the anticipated end-use and desired specifications of the agglomerates. Binders are available by the hundreds, from water and oil, to starch and molasses. With such a wide variance in binding options, testing is …
High-speed mixers are used in animal feed granulation, a process specific to FEECO International. The mixers provide a better-quality reaction, and results in a more uniform product. The high-speed mixer is mounted atop of a pugmill mixer, also known as a paddle mixer. A shaft …
A rotary dryer’s flights, or material lifters, work by lifting the material and dropping it through an air steam. This process creates a curtain, or a shower of material spanning the width of the drum’s interior. The curtain maximizes heat transfer between the material and …
Annual rotary drum inspections are critical to maintaining operational efficiency, prolonging equipment life, and preventing unnecessary interruption. In fact, all equipment in the operation should be examined on an annual basis, especially if the material to be worked with is corrosive or abrasive, a common …
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. …