筛子：一种粗筛，用于筛选优良的东西，比如沙子、碎石或者煤。
A coarse sieve used for sifting out fine particles, as of sand, gravel, or coal.
他们在筛煤。
经压碎后的煤通过第二道筛，筛出细粉。
The secondary screens receive the coal from the crushers and remove the fines.
根据理论分析和试验结果，建立了煤用概率分级筛的数学模型。
Based on the results of the analysis, a mathematical model of the screen is established with piecewise function to describe completely the partition curve of the probability sizing.
振动分级筛在矿井毛煤转化为入洗原煤过程中是保证入洗原煤和产品原煤质量(粒度合格)的关键设备。
Vibration classification screen is the key to ensure the quality of washing raw coal and product raw coal in the process of changing from run-of-mine coal to washing raw coal.
据说煤中掺有石子和其它杂质须去掉时，至今仍得把煤在矿上筛过。
To this day coal is said to be screened in the colliery when it has stone and other impurities removed from it.
YA圆振动筛适用于煤、石灰石、碎石、砂砾、金属或非金属矿石及其他物料的筛分。
YA circular vibrating screen is suitable for the coal, limestone, gravel, sand, metal or nonmetal ore and other material screening.
本发明公开了一种煤基碳分子筛及其制备方法。
The invention discloses a coal-based carbon molecular sieve and a preparation method thereof.
本发明提供的制备煤基碳分子筛的方法，制备原料来源丰富、价格低廉；
The method for preparing the coal-based carbon molecular sieve has rich source of preparation raw materials and low cost;
本发明提供的制备煤基碳分子筛的方法，制备原料来源丰富、价格低廉；
The method for preparing the coal-based carbon molecular sieve has rich source of preparation raw materials and low cost;
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