1. Working principle: the natural cool air enters from outside of dry-type slag extractor into inside of dry-type slag extractor under the function of negative pressure of coal powder boiler hearth (the recycling fluidized bed uses pressured wind of secondary blower) to cool the hot slag into cold slag that can be directly stored or transported.
工作原理：自然冷风在煤粉锅炉炉膛负压作用下（循环硫化床利用锅炉二次风机压力风），从干式排渣机外部进入干式排渣机内，将高温、含有大量热量的热渣冷却成可以直接贮存和运输的冷渣。
2. The coal based directly reduced iron production technologies such as the rotary kiln, floating bed of circulation, rotary hearth furnace and carbon covered open fired method are introduced.
介绍了回转窑法、循环流化床法、环形转底炉法以及 COF法煤基直接还原铁生产方法，指出了各自的优缺点和发展前
3. For the circulating fluidized bed incinerator developed by Tsinghua University, the k - ε double equation model was applied to establish the mathematic models of the gas-phase turbulent flow in the hearth.
本文针对清华大学开发设计的循环流化床垃圾炉，应用k-ε双方程模型建立了炉内气相湍流流动的数学模型。
4. Cokiug problem arose in the boiler hearth in some cane sugar mills in the application of fluidized-bed equipment for bagasse drying.
一些甘蔗糖厂安装使用蔗渣流态干燥设备后，出现了炉膛容易结焦的问题。
5. " After some search, I found that the floor gave a hollow sound near the head of the bed, and at the hearth. "
“找了一些时候以后，我发觉床头和壁炉底下听来象是空的。”
6. In the paper is reviewed the direct pyrolysis and roasting processes by rotary kiln, reverberatory furnace, multiple hearth furnace, fluidized bed, flash roaster as well as additives co-roasting process for molybdenite. Suggestion is put forward on the development of molybdenum roasting process.
对辉钼矿的回转窑焙烧，反射炉焙烧、多膛炉焙烧、流化床焙烧、闪速炉焙烧、添加助剂焙烧等焙烧工艺及直接热解工艺进行了评述，并对辉钼矿焙烧工艺的发展提出了建议。
7. Summary on the Installation Technology of Hearth Mechanical Equipment of Walking Beam Furnace New Technology in the Cupola (Part ⅰ): The New Theory of Operation and Coke Bed Control
浅谈步进式加热炉炉底机械设备安装技术冲天炉新技术（1）：冲天炉操作新理论与底焦控制