关于煤炭标准的几个名词对应的英文

1.灰分：ash in coal
Article 24 The State promotes the method of dressing coal by washing for the purpose of reducing the sulfur and ash in coal,and restricts the mining of high-sulfur or high-ash coal.
第二十四条 国家推行煤炭洗选加工,降低煤的硫份和灰份,限制高硫份、高灰份煤炭的开采.
2.挥发物 volatile
it was heated to evaporate the volatiles.
汽油是常见的挥发物.
3.硫含量 sulfur content
4 粒度 fineness
sand fineness
砂子平均粒度
5
powdered anthracite
粉状无烟煤