振动筛处理能力的探讨

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1、重庆工商大学2009届毕业“论文”设计题目：振动筛处理能力的探讨专业：机械设计及自动化姓名：×××班级：×××指导教师：×××起止日期：2012年1月18日至2012年5月18日8目录0前言·································································11处理量的校核·································································11.1煤炭筛分··········································

2、···················11.2其它材料的筛分····································································11.3处理量的其它校核···························································21.3.1用于筛分································································21.3.2块煤脱介······························

3、·····································51.3.3块矸石脱介································································51.3.4脱水··········································································52筛分效率··································································62.1煤炭筛分·········

4、····························································62.2其它筛分·····································································73脱水效率·······································································74结论·································································

5、····780前言：当前，振动筛在煤炭洗选行业应用十分普遍，是对原煤进行深加工，满足不同市场需求必不可少的一种筛分设备。随着生产节奏的日益加快，低效率、低安全性的煤炭洗选系统已远远不能满足生产的需要。因此，本文对直线振动筛的处理能力进行理论上的总结与探讨。1处理量的校核由于实际工况十分复杂，国内外的计算方法很不统一，本文采用下列计算方法：1.1煤炭筛分Q=Fqt/h……………………………………………….（1）式中：F——筛面有效面积，m2；q——单位处理量（见表4），t/（h•••m2）。表1振动筛种类筛分种类筛分效率单位处理量t/（h•••m2）筛孔尺寸mm

6、100.0050.0025.0013.006.000.500.25直线振动筛准备筛分干法80%—35~4020~258~10———湿法85%———10~128~10——最终筛分干法85%—35~4018~22————湿法85%———10~128~10——脱水末煤——————7—煤泥——————22脱介块煤————1010——末煤——————3—末矸——————2—1.2其它材料的筛分Q=FqγKxiLCUJxNKOshEft/h……………………………………………….（2）式中：——单位筛分面积的平均容积处理量（见表2），m3/（h•••m2）；γ——材料的松散

7、密度，t/m3；Kxi、LCU、Jx、NK、Osh、Ef——修正系数（见表3）。8表2筛孔尺寸mm0.160.200.300.400.600.801.172.003.155.00qm3/（h•••m2）1.92.22.52.83.23.74.45.57.011.0筛孔尺寸mm8.0010.0016.0020.0025.0031.5040.0050.0080.00100.0qm3/（h•••m2）17.019.025.528.031.034.038.042.056.063.0表3系数考虑的因数筛分条件及各系数值Kxi细粒的影响给料中料度小于筛孔之半的颗粒含量0%

8、10%20%30%40%50%60%7