Is there a relationship between high coke sulfur content and coking time?
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Dear experts, our factory has just started operations, and the sulfur content in the coke produced is on the high side. The quench water used is untreated recycled ammonia water – could this be the reason? Is it still because of the long coking time? Does coking time have an impact on coke sulfur content?
Most of the sulfur in coal remains in the coke, with only a small portion being carried away by the volatiles. High sulfur content in coke is mainly due to high sulfur content in coal, and it has little to do with other factors
The sulfur in coke originates mainly from coal, and 50–70% of the sulfur in coal ends up in coke. Ammonia water doesn’t contain sulfur; so how is it related to quenching water? If the coking time is short, the coke is not fully cooked, and the volatiles (including sulfur) are not completely evaporated, resulting in a higher sulfur content in the coke ； If the coking time is long, it shouldn’t be high.
Well, I’ve learned it*. Sorry, I was on a business trip those days and didn’t check the replies in time.
It has nothing to do with untreated circulating ammonia water. With a short coking time and short turnaround time, a higher furnace temperature is required. At higher furnace temperatures, more thiol compounds in the coal decompose, resulting in more sulfur entering the gas. The sulfur content in gas mainly depends on the sulfur content of the coal used; the coking time has an impact, but it is not significant@
This post was last edited by MountainWindAccompaniedByMoon on January 16, 2012, at 19:52. Sulfur exists in coal in various forms! Some of these forms are easy to decompose, while others are not! For instance, compared to organic sulfur, sulfates, sulfites, and sulfides are more difficult to decompose! It’s necessary to conduct a detailed analysis of the coal quality! Our company usually conducts iron-box tests on individual types of coal to determine the residual sulfur content in each type. When blending coals, we perform detailed weighted calculations as well!
“Our company usually conducts box tests on single types of coal in order to determine the residual sulfur content in each type of coal! Hey there upstairs, could you share this information with everyone? Thank you!
If the coking wastewater is mixed with desulfurization waste liquid, the sulfur content in the coke ends up being higher than that in the coal fed into the furnace; we have encountered this situation several times.
It has little to do with the coking time; instead, it’s the structure of the coaling coal that matters. There are hardly any other significant influences. Note: Theoretically, there is a certain relationship between coking time, furnace temperature, and the sulfur content in coke, but in actual production, since the coke can be removed from the furnace, any sulfur that needed to be decomposed has already been done so and removed