Factors causing the M10 to be too large
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All the coal blending parameters of our unit are satisfactory, but the M10 value of the coke is too high. What could be the reason? The volatile matter content is less than 31.5, the Y value is around 12, the G value is around 70, and the lean coking degree is 15%.
This post was last edited by hao101029 on 2011-10-28 at 20:50. Please specify the furnace type, cycle time, and main composition ratios, as well as which M10 value is higher.
There are many factors that affect M10, such as the coal blending ratio, fineness, coking time, and the method of quenching the coke. I’m not sure whether your M10 level is occasionally high or consistently high If it remains high consistently, it is generally due to an issue with the coal blending ratio; it is advisable that the volatiles content of the ash-free base coal blend not exceed 30% (our plant keeps this value at around 30.5% at present for cost reduction purposes, while M10 can
I agree with the opinion above; to add, is the data for your M10 accurate? It is recommended to reduce the volatile content; when the porosity of the coke is high, M10 performance is not good.
Reply: What 3# shengjw said is really authoritative. Agree with the view.
This post was last edited by shengjw on 2011-10-28 23:16. Reply to 4# sxlfsyl: Automatic sampling from the belt below the screen furnace yields reliable data. That’s right; the volatile content is high, and the reactivity is significantly higher by 3-4 points compared to earlier stages.
Reply to 5# anshuang516: Thank you. It’s not so much an authority on the subject; I’ve just learned it myself.
Thank you to all my fellow sailors. The shrinkage value is around 20, and the coking time is over 60 hours; it’s likely due to high volatile content.