Indirect-fired rotary kilns, also commonly called calciners, are a specialized thermal processing machine used to cause chemical reactions and phase changes in materials for a variety of industrial purposes. Used in settings where the processing environment must be kept inert, or where entrainment of fines …
What is Metallurgical Coke? Aka: coke, met coke Metallurgical coke is created through the destructive distillation of coal or coal blends. This thermal treatment drives off volatile components and leaves behind a solid carbon material (note that this is different from petroleum coke, which is …
Feasibility testing for drum drying processes offers valuable information when designing an industrial drying system. Feasibility testing offers the opportunity to confirm the viability of your intended process, as well as to work out process variables and other unknown data points, helping to define a …
This week’s photo highlights a rotary kiln dam in 3D. Oftentimes, it is necessary to increase retention time and/or bed depth in a kiln. This is achieved through the use of a dam. A rotary kiln dam works by forcing material to build up behind …
This week’s photo shows a batch kiln from FEECO’s Innovation Center. The batch kiln can be used for a variety of high-temp, thermal process testing applications, including waste incineration, mineral roasting, proppant sintering, and more. The batch kiln simulates conditions of a commercial size rotary …
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 …
Our photo this week is a 3D rotary cooler. Rotary coolers are a common equipment of choice when it comes to cooling bulk solids. They utilize direct contact between the material and cooling air, in combination with lifting flights, to maximize heat transfer between the material …
This week’s highlighted resource is a Slideshare presentation on rotary dryer sizing and design. The Rotary Dryer Sizing and Design slide deck is a great introduction to the complex process of designing a custom rotary dryer for any industry. Material characteristics that affect design, processing …
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. …
This week’s highlighted resource is a web page on spent carbon reactivation. Activated carbon is increasingly becoming more popular as an adsorbent in many applications. One benefit to this amazing adsorbent is its ability to be reactivated and reused. This page covers the process of …