
This Land Is Mined: The Coal Masterclass
Decouple
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Coke Is a Rank of Coke
Carbon can only be heated to about 400 degrees Fahrenheit. This is the realm of coke or cooking coal, which has been further heated without oxygen. The final step here would be a 100% pure carbon substance like graphite. Depending on combustion efficiency and temperature, other substances can be produced from burning different ranks of coal.
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