One Question per Day (January 22, 2018)
Thread Content
Which types of low-rank coal are mainly referred to? Lignite, bituminous coal, subbituminous coal, weakly bituminous coal
Answer: Lignite, bituminous coal, subbituminous coal, weakly coking coal
There are two types: lignite and low-graded bituminous coal.
Low-rank coals mainly include seven types: low-moisture peat, medium-moisture peat, high-moisture peat, earthy lignite, dark lignite, light lignite, and firewood coal.
Lignite, bituminous coal, subbituminous coal, weakly bituminous coal
Which types of low-rank coal are mainly referred to? Answer: Lignite, bituminous coal, subbituminous coal, weakly coking coal
Lignite, bituminous coal, subbituminous coal, weakly bituminous coal
Lignite, bituminous coal, subbituminous coal, weakly bituminous coal
Low-grade coal refers to coal that is in a low degree of metamorphism; it features low ash and sulfur content, high volatility, and high reactivity. The main types of such coal include lignite and low-grade bituminous coal.