In case MMR in coal increases from 1 t0 1.9 or more and decreases from 0.8 to 0.1, in both cases what happens in the respect of process and operation and quality of coke
The value of Mean Maximum Reflectance in coking coal varies in the range of 0.85-1.35%. For obtaining of blast furnace coke is considered optimal MMR about 1.2%.