RE: Business update key points to stay focused on for 202313 Apr 2023 23:06
If the client had any interest in putting in electric kilns it would have done it long ago instead of going with QED.
Also, the type of Kiln has to fit the job it is performing. Electric only appears on the indirect fired rotary kilns, so if the client uses and needs a direct-fired rotary kiln it can't use an electric one. Check out the typical processes that each are suitable for.
Rotary Kilns:
In a direct-fired rotary kiln, the burner is situated inside the kiln body, that is, inside the reaction chamber. The material is heated directly by the burner flame and the stream of hot gas produced by the burner. These kilns are usually lined with refractory (heat-resistant) material so that they can be operated at higher temperatures than kilns with plain metal tubes. Directly fired kilns are highly robust and easily scalable and can be used to achieve high throughput rates with relatively low production costs.
Facts & Data
Temperature range: 100 – 1,550°C
Residence time: 15 – 180 minutes
Reaction modes: continuous, batch, co-current, counter-current
Typical Processes: calcination , sintering , reduction , oxidation and drying
In contrast to directly fired kilns, indirect fired rotary kilns (also called rotary calciners) are equipped with natural gas burners or electric heating elements located outside the reaction chamber, so that the heat is transferred to the interior through the kiln shell. This arrangement makes it easy to operate the kiln with a controlled gas atmosphere in the reaction chamber (e.g. inert or reducing). Because combustion gases are kept out of the reaction chamber, the gas volume flow in an indirectly fired kiln is generally lower than in directly fired kilns. This means the indirect rotary kilns are excellent for treatment of very fine powders. They are also easier to clean, so that cross-contamination of materials can be more effectively prevented.
Facts & Data
Temperature range: 100 – 1,400°C
Residence time: 15 – 180 minutes
Reaction modes: continuous, co-current, counter-current, batch
Typical Processes: pyrolysis, calcination, reduction and surface treatment of catalyst supports
https://www.ibu-tec.com/facilities/rotary-kilns/
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