The frozen coal destruction is the tension stress destroys, and establish the frozen coal cutting model in this foundation, obtains the cutting force, feeding force, tooth spacing according to the smallest energy principle. bring forward a rotary drilling mothod to unload the frozen coal, the broken ability is strong, without frozen depth limits, then obtains this machine working parameters, has combined this method with a grab and determined the plane of vehicle - carried rotary drilling movable coal - unloader
凍
煤破壞是拉應力破壞,在此基礎上建立了凍
煤的切削模型,根據最小能量原理得到截割力,進給力和截齒間距
的計算公式,分析得到截割力與切削厚度成正比,隨著前角
的增大而減小;截齒最優截距與截齒尺寸有關且與切屑厚度成正比;進給力隨著截齒前角增大而增大
的規律。
West coal plant to take full advantage of the advantages of ningxia too, produce training materials putin, electricity increased carbon agent training materials
該廠充分利用寧夏太西
煤的優勢,生產出普鍛料、電鍛料增炭劑。
The noncarbon constituents of the coal would be separated.
煤的非碳成分將分離出來。
There are extensive coal deposits in the u. s. s. r.
蘇聯
的煤的儲藏很豐富。
The destructive distillation of bituminous coal, done in the absence of air in order to obtain coke and other fractions having a greater percentage of carbon than the original material
碳化作用煙
煤的分解蒸餾,在沒有空氣
的條件下進行,為得到比最初
的原料所含碳
的百分比大得多
的焦
煤以及其它餾分
An introduction was made to the dry distillation process of coal, anti - metal penetration mechanism of coal dust and influences of various physical - chemical properties of coal dust on its anti - metal penetration ability, view points on coal dust choice and choice methods
摘要介紹
煤的干餾過程、
煤粉在型砂中
的防粘砂機理和
煤粉
的各項理化指標對其防粘砂能力
的影響,以及選擇優質
煤粉
的觀點和方法。
The development of electrochemistry desulfurization of coal
煤的電化學脫硫及其進展