劣质煤表面看上去与正规煤厂生产的标准蜂窝煤并无两样，且每块价格比国有煤厂的便宜近0.4元左右于这种劣质煤在原料上和加工模具上做了“手脚”，其燃烧效率要比国有煤厂的蜂窝煤低很多，且会对空气产生严重污染。
灰熔聚流化床粉煤气化技术的工业优化_道_天涯博客 关键词：灰熔聚；煤气化；劣质煤；晋煤集团； [gap=719]Key words: ash agglomerating; coal gasification; inferior coal; JAMG
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... low grade concrete 低标号混凝土... low grade coal 劣质煤 low grade fuel 低级燃料,劣质燃料...
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劣质煤锅炉 Inferior coal boiler
劣质无烟煤 lambskin
劣质烟煤 soft coal
劣质细煤 dross
质量低劣煤燃烧与哄骗 Tinpot Coal Combustion & Use
High-ash coal as therepresentative of inferior coal, it will be used frequently in the cement production. However, the change of the coal quality will be certain influence the clinker burning,quality and the stable of the kiln's condition.
以高灰分煤为代表的劣质煤，在水泥生产中的频繁使用必然会影响到熟料煅烧、窑系统工况稳定以及能耗高低等。
参考来源 - 高灰分煤对硅酸盐水泥熟料烧成过程的影响规律研究·2,447,543篇论文数据，部分数据来源于NoteExpress
他们也倾向于生产劣质煤，这些煤在燃烧时产生相对高的污染水平。
They also tend to produce poor-quality coal which generates relatively high levels of pollution when burned.
文中尚对劣质煤沸腾燃烧锅炉中的埋管辐射放热系数进行了讨论。
The radiative heat transfer coefficients of the immersed tude within the operating conditions of the fluidized bed combustion boiler with low grade coal are also discussed.
固定层煤气发生炉试烧劣质煤，以解决煤价高、生产成本大的问题。
Burning faulty coal is tried out in a fixed-bed gasifier, to solve the problems of high coal price and production cost.
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