The elements Ge and Ga are the useful elements in in coal.
煤中的锗和镓是可利用伴生元素。
There were many debates about the advantages and disadvantages of multi-nozzle opposition and GE mono-nozzle coal water slurry gasifier, especially the efficiency.
目前关于多喷嘴气化炉和GE单喷嘴水煤浆气化炉工艺的优劣存在争议，特别是对运行效率问题，众说纷纭。
The appropriate conditions that the enriched Ge-bearing lignite in Lincang brown into coal ash with oxidizing roasting method was studied.
研究了采用氧化焙烧法将富集临沧含锗褐煤转化成褐煤灰的适宜条件。
应用推荐