Miners are finished extracting coal here, and the sides of the tunnel have been sprayed with quicklime to suppress explosive coal dust. 矿工们已经完成了这里的煤炭开采，坑道两壁都喷上了生石灰以防止煤尘爆炸。
The trial and industrial practice demonstrate that blast furnace pulverizing coal injection lead extraction process is successful and effective. 试验和工业实践证明，鼓风炉粉煤喷吹炼铅工艺是成功有效的。
The technology of coal powder spurted burning is applied in the annealing furnace for low carbon steel wire heated with coal powder. 煤粉加热低碳钢丝退火炉采用粉煤喷射燃烧技术，节能效果显著，环境污染有所改善，是值得推广的炉型。
