Tech Team · Kintek Solution

The burning temperature of a furnace depends on the type of furnace, the fuel used, and the specific application. Furnaces can operate across a wide temperature range, typically from 200 °C to 1800 °C, depending on the fuel and process requirements. For instance, when dry fuel is burned, temperatures can range from 300 °C to 1800 °C, while burning coal-water slurry (CWS) results in a lower range of 200 °C to 1200 °C. Continuous furnaces, used for heat treatment processes like annealing or hardening, maintain consistent temperatures tailored to the material and process. Muffle furnaces, on the other hand, should operate 50 °C below their maximum rated temperature to ensure longevity and safety, with environmental factors like humidity and corrosive gases also influencing their operation.

Key Points Explained:

1. Temperature Range Based on Fuel Type:

   • The burning temperature of a furnace varies significantly depending on the fuel used.
   • Dry fuel combustion can achieve temperatures between 300 °C and 1800 °C.
   • Coal-water slurry (CWS) combustion results in a lower temperature range of 200 °C to 1200 °C.
   • This variation is due to differences in combustion efficiency, energy content, and heat transfer characteristics of the fuels.

2. Continuous Furnaces and Process-Specific Temperatures:

   • Continuous furnaces are designed for specific heat treatment processes such as annealing, hardening, normalizing, or carburizing.
   • These furnaces operate at consistent, process-specific temperatures to ensure uniform treatment of materials.
   • The temperature is determined by the type of steel or material being processed and the desired heat treatment cycle.

3. Muffle Furnace Operating Guidelines:

   • Muffle furnaces should operate 50 °C below their maximum rated temperature to extend the lifespan of the heating elements.
   • They must be used in environments with relative humidity below 85% and free from conductive dust, explosive gases, or corrosive gases.
   • When heating materials that release volatile gases (e.g., metals with grease), sealed containers or proper ventilation should be used to prevent damage to the heating elements.

4. Environmental and Operational Considerations:

   • The operating temperature of a furnace is influenced by environmental factors such as humidity, dust, and the presence of corrosive or explosive gases.
   • Proper maintenance and adherence to operational guidelines are critical to ensure safety, efficiency, and the longevity of the furnace.

By understanding these factors, a purchaser can select the appropriate furnace type and operating conditions for their specific needs, ensuring optimal performance and durability.

Summary Table:

Factor	Details
Fuel Type	Dry fuel: 300 °C–1800 °C; Coal-water slurry: 200 °C–1200 °C
Continuous Furnaces	Operate at consistent, process-specific temperatures for heat treatment
Muffle Furnaces	Operate 50 °C below max rated temperature; humidity <85%, no corrosive gases
Environmental Factors	Humidity, dust, and corrosive gases affect furnace performance and safety

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