The temperature of a calcination furnace typically ranges from 800°C to 1300°C, depending on the specific application. This range is chosen to facilitate thermal decomposition, removal of volatile fractions, or phase transitions in the materials being processed. The maximum operating temperature for these furnaces can reach up to 1700°C, ensuring a wide operational range for various industrial needs.
The heating elements in these furnaces are typically vertically mounted SiC (silicon carbide) rods, which are controlled by a thyristor controller to counteract the aging process of the heating elements, thereby maintaining efficiency and longevity. The furnaces are designed with multi-layered insulation and lined with lightweight refractory bricks to enhance performance and temperature retention. Additionally, they are equipped with motor-driven exhaust systems and are often automated using SCADA systems with PLCs for precise control and monitoring.
For specific applications, the temperature range can be adjusted, with some processes operating between 175°C and 730°C, and special applications extending this range from as low as 120°C to as high as 925°C. In vacuum furnaces, temperature uniformity is maintained within plus or minus 10°C, ensuring consistent processing conditions. Temperature measurement in these furnaces is achieved using far-infrared optical temperature measurement, with a range of 0°C to 2400°C and an accuracy of 0.2-0.75%. Temperature control can be either program-controlled or manually controlled, with a precision of plus or minus 1°C.
Overall, the temperature settings in calcination furnaces are meticulously controlled to suit the specific requirements of the materials being processed, ensuring optimal results in terms of material transformation and quality.
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