Coking
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Recently, our plant replaced its rammer, and production was halted for 3 days. I would like to ask whether, after those 3 days when production resumes, the coking time can return to its original level of 23 hours right away. Would that cause severe damage to the furnace? Or does the coking time need to increase gradually back to 23 hours – for example, from 69 hours to 32 hours to 23 hours – rather than returning to that level immediately? Since I have just started working in the coking industry, there may be some simple questions I’m not very familiar with, but I hope everyone can help me. Thank you in advance! ! !
It’s not possible to go back to 23 hours immediately; the setting needs to be adjusted according to the furnace temperature. Generally, to significantly extend the coking time, the furnace temperature should be at least 1150 degrees. Therefore, once production resumes, the time can be reduced to around 40 hours. Before 30 hours, the time can be shortened by 3 hours per day; before 26 hours, it can be shortened by 1–2 hours; and before 23 hours, it can be shortened by 0.5–1 hour per day. To reduce the coking time, it’s necessary to increase the temperature in advance.