Regarding the straight-through temperature of coke ovens
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At present, the K mean and K safety coefficients of our plant’s coke ovens are both above 0.8, but the highest and lowest temperatures reach around ±50. What are the requirements in this regard? Are there any specific regulations?
Let’s discuss it together and help each other out
Our standard specifies an average straight-line temperature of 1355 degrees, plus or minus 10 degrees. However, a temperature range of 1330 to 1385 for each furnace is perfectly acceptable. The temperature changes should be determined according to the rules set by your own workshop. If your factory has to follow strict fixed targets, then I think you won’t be able to produce coke.
It’s not based on fixed metrics either; rather, it’s about checking whether there are any relevant regulations, or what the average level for various companies is
There are certainly relevant regulations; please refer to the \"Coking Technology Management Regulations\"
Follow the strict regulations: when calculating k for straight-line temperature, a value exceeding ±20°C is considered unacceptable; when calculating k for safety purposes, a value exceeding ±7°C is unacceptable. For flues where the temperature exceeds ±50°C, adjustments need to be made.
It’s normal, as the temperatures in the combustion chambers on both sides of the carbonization chamber follow a “W”-shaped pattern as the coking time changes. This difference between high and low temperatures is related to both the furnace temperature and the length of the coking time. For example, if our cycle time is 26 hours and the standard temperature is 1330°C, we keep the difference between the highest and lowest temperatures during each cycle within 80°C; in this case, our K value can reach over 0.95. If the cycle time is 40 hours and the standard temperature is 1270°C, we keep the temperature difference within 100°C, and our K value is around 0.85.
The higher the coefficient, the better; it reflects the uniformity of the furnace temperature. The better the uniformity, the better the quality of the coke will be. It is important to maintain proper temperatures in the straight sections, across the rows, and at the furnace head. All three must be adjusted properly.