砂石系统生产能力的确定.doc

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1、砂石系统生产能力的确定一、 选定工作制度根据系统性质及供料、供水、供电、设备检修等条件确定。1、 月工作天数：一般为25天。2、 日工作班数：2班或3班作业。3、 日工作小时：由日工作班数和各部位生产情况确定。4、 毛料采运时间：根据要求的开采强度，采运设备的生产能力选定。5、 半成品加工时间：要求超径石处理、予筛分、粗碎、中碎的时间一致。3班作业为1520小时；2班作业为1114小时。6、 成品筛洗时间：3班作业为20小时；2班作业为1214小时。7、 人工制砂时间：要求3班24小时作业，以求产品粒度的稳定。二、 系统生产能力的确定1、系统总生产能力的确定：主要根据混凝土浇筑月高峰强度、混凝

2、土级配、各种粒径的需要量以及生产加工损耗等因素进行综合考虑确定。按以下公式计算： Qakk1系统总生产能力：P = (t/h) MN式中：Q 混凝土浇筑月高峰强度；(m3/月)a 每立方米混凝土所需的砂石料；(t/m3) 常取2.25 t/m3k 日生产不均匀系数；常取1.25k1 混凝土浇筑系数；常取 1.03 M 月工作天数；常取25天N 日工作小时数；按工作制度选定。2、系统毛料处理能力：Pm = P/ (t/h) =k2k3k4k51+（k2k3）-1 式中：P系统总生产能力；(t/h)成品生产率；常取0.80.9 k2粉砂流失系数；1.11.3 k3转运损失系数；1.021.03 k

3、4冲洗损失系数；1.031.1 k5级配不平衡系数；1.01.1毛料的含砂率。3、成品砾石（碎石）生产能力：PS = P（1）kSkZ (t/h) 成品砂的生产能力： Pr = PkrkZ (t/h)式中：kS砾石加工（筛洗、转运）损耗系数；kr砂料加工（筛洗、转运、流失）损耗系数；kZ砂石料成品储存系数；确定天然砂砾石毛料开采总量 V00K实体开挖总量： V = （万m3） A0（1K1）（K2）（K3）式中：V0砂或砾石控制粒径的需要量；（万m3）0砂或砾石控制粒径的容重；毛料的天然容重；一般砂取1.5 t/m3，砾石取1.6t/ m3K 级配变化系数；常取1.1A0砂或砾石控制粒径的天然

4、含量；K1开采损耗系数；水下开采：砂取0.35，砾石取0.05；水上开采：砂取0.15，砾石取0.03；K2运输、堆存损耗系数；常取0.1K3筛分加工损耗系数；砂取0.15，砾石取0.03确定砂砾石料堆料场容量1、确定砂砾石料成品堆料场容量；根据混凝土高峰期最高月浇筑强度，砂料脱水温控要求确定：砂石料成品料场容积：VZ=QHAK2/3K1 （万m3）式中：QH混凝土最高月浇筑强度；（万m3/月）A 1 m3混凝土所需的砂石料；一般为1.5m3砂石料K2级配变化系数；1.11.5K1 活库容与总库容之比；依地形情况选择，平地0.552、确定砂砾石毛料堆场容积毛料堆场容积：V毛=（Q1Q2）nK

5、（万m3）式中：Q1毛料持续开采高峰月平均强度；（万m3/月）Q2相应的月筛分强度；（万m3/月）n 持续生产月数；K 毛料储存系数；（1.11.2）3、考虑受汛期的影响，按下式进行堆料场容积的效核计算； VS+Vm VZ + QS B AKZ式中：VS 汛期毛料开采量；（万m3）Vm 毛料堆场储存量；（万m3）V Z 成品砂石料堆场总量（活容积）；（万m3）B 每1 m3混凝土所需的毛料量；A 每1 m3混凝土所需的成品砂石料；KZ 级配变化系数；1.11.5QS 汛期混凝土浇筑总量；（万m3）胶带机功率计算一、 传动滚筒轴功率计算：1、传动滚筒轴功率计算：N0=（N1+N2+N3）k3k4

6、+N4 （kw）式中：N0传动滚筒轴功率；（kw）N1输送带及托辊转动部分运转功率；根据带宽B(mm)带速V(m/s)、胶带机水平长度Lh(m)查表（表1表4）N2物料水平运输功率（kw）；根据胶带机输送量Q(t/h)、胶带机水平长度Lh(m)查表（表5表7） N3物料垂直提升功率（kw）；根据胶带机输送量Q(t/h)、物料提升高度H(m)查表（表8） N4卸料器及导料槽附加功率：（根据带宽B值、卸料器个数n值、导料槽长度L值查表9确定） （kw）k3附加功率系数；（根据胶带机水平长度Lh值和倾角值查表10选定）k4卸料功率系数：光面滚筒取1.16，胶面滚筒取1.11；2、电动机功率计算：电动

7、机功率：N=KN0/式中：K功率备用系数，一般取1.4；N0传动滚筒轴功率；（kw）总传动效率：光面滚筒取0.88，胶面滚筒取0.9；胶带机极限倾角干砂15； 湿砂27； 湿砾石22；筛过的干砾石18；碎石和未筛过的砾石20； B=500mm转动部分运转功率N1值表 表1 （kw） V （m/s） Lh (m) V Lh清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.01.251.62.01.01.251.62.01.01.251.62.0100.0670.0840.1070.1340.100.1250.160.200.1340.1680.2140.268200.1340.1680.2140.

8、2680.200.2500.320.400.2680.3360.4280.536300.2010.2510.3220.4020.300.3750.480.600.4020.5040.6420.804400.2680.3350.4290.5360.400.500.640.800.5360.6720.8561.072500.3350.4190.5360.6700.500.6250.801.000.6700.841.0701.34600.4020.5030.6430.8040.600.750.961.200.8041.0081.2841.608700.4690.5860.7510.9380.700.

9、8751.121.400.9381.1761.4981.8876800.5360.6700.8581.0620.801.001.281.601.0621.3441.7122.144900.6030.7540.9651.2060.901.1251.441.801.2061.5121.9262.412 B=650mm转动部分运转功率N1值表 表2 （kw） V （m/s） Lh (m) V Lh清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.01.251.62.01.01.251.62.01.01.251.62.0100.0820.1030.1310.1640.1240.1550.1980.248

10、0.1650.2060.2640.330200.1640.2050.2620.3280.2480.3100.3970.4960.3300.4130.5280.660300.2460.3080.3940.4920.3720.4650.5950.7440.4950.6190.7920.990400.3280.4100.5250.6560.4960.6200.7940.9920.6600.8251.0561.32500.4100.5130.6560.8200.6200.7750.9921.2400.8251.0311.3201.65600.4920.6150.7870.9840.7440.9301.

11、1901.4880.9901.2381.5841.98700.5740.7180.9181.1480.8681.0851.3891.7361.1551.4441.8482.31800.6560.8201.0501.3120.9921.241.5871.9841.3201.6502.1122.64900.7380.9231.1811.4761.1161.3951.7862.2321.4851.8562.3762.97 B=800mm转动部分运转功率N1值表 表3 （kw） V （m/s） Lh (m) V Lh清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.01.251.62.01.01.251

12、.62.01.01.251.62.0100.110.1380.1760.220.1650.2060.2640.330.220.2750.3520.44200.220.2750.3520.440.3300.4130.5280.660.440.5500.7040.88300.330.4130.5280.660.4950.6190.7920.990.660.8251.0561.32400.440.5500.7040.880.6600.8251.0561.320.881.1001.4081.76500.550.6880.8801.100.8251.0311.3201.651.101.3751.7602

13、.20600.660.8251.0561.320.9901.2381.5841.981.321.6502.1122.64700.770.9631.2321.541.1551.4441.8482.311.541.9252.4643.08800.881.1001.4081.761.3201.6502.1122.641.762.2002.8163.52900.991.2381.5841.981.4851.8562.3762.971.982.4753.1683.96 B=1000mm转动部分运转功率N1值表 表4 （kw） V （m/s） Lh (m)清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.0

14、1.251.62.01.01.251.62.01.01.251.62.0100.1530.1910.2450.3060.2290.2860.3660.4580.3060.3830.4900.612200.3060.3830.4900.6120.4580.5730.7330.9160.6120.7650.9801.224300.4590.5740.7340.9180.6870.8591.0991.3740.9181.1481.4691.836400.6120.7650.9801.2240.9161.1451.4661.8321.2241.5301.9582.448500.7650.9561.22

15、41.5301.1451.4311.8322.2901.531.9132.4483.060600.9181.1481.4691.8361.3741.7182.1982.7481.8362.2952.9383.672701.0711.3391.7142.1421.6032.0042.5653.2062.1422.6783.4274.284801.2241.5301.9582.4481.8322.2902.9313.6622.4483.0603.9174.896901.3771.7212.2032.7542.0612.5763.304.1222.7543.4434.4065.508 清洁、干燥条件

16、下物料水平运输功率N2值表 表5 （kw） Q (t/h)Lh（m）102030405060708090100100.005450.01090.01640.0220.02750.03270.03820.04360.04910.0545200.01090.02180.0330.0440.05450.06540.07630.08720.09810.109300.016350.03270.04910.0660.08180.09810.11450.13080.14720.1635400.02180.04360.0660.0880.1090.13080.15260.17440.19620.218500.

17、027250.05450.0820.1090.13630.16350.19080.21800.24530.2725600.03270.06540.09810.1310.16350.19620.22890.26160.29430.327700.038150.07630.1150.1530.19080.22890.26710.30520.34340.3815800.04360.08720.1310.1750.2180.26160.30520.34880.39240.436900.049050.09810.14720.1970.24530.29430.34340.39240.44150.4905 少

18、量尘埃、正常湿度条件下物料水平运输功率N2值表 表6 （kw） Q (t/h)Lh（m）102030405060708090100100.00820.01640.02450.03270.04090.04910.05720.06540.07360.0817200.01640.03270.04910.06540.08170.09810.11440.13080.14700.1634300.02450.04910.07360.09810.12260.14810.17160.19610.22060.2451400.03270.06540.09810.13080.16340.19610.22880.261

19、50.29420.3268500.04090.08170.12260.16340.20430.24510.2860.32680.36770.4085600.04910.09810.14710.19610.24510.29420.34320.39220.44120.4902700.05720.11440.17160.22880.2860.34320.40040.45760.51470.5719800.06540.13080.19610.26150.32680.39220.45760.52290.58830.6536900.07360.14710.22060.29420.36770.44120.5

20、1470.58830.66180.7353 大量尘埃、湿度大条件下物料水平运输功率N2值表 表7 （kw） Q (t/h)Lh（m）102030405060708090100100.01090.02180.03270.04360.05450.06540.07630.08720.09810.1089200.02180.04260.06540.08710.10890.13070.15250.17430.19610.2178300.03270.06540.09810.13070.16340.19610.22870.26140.29410.3267400.04360.08720.13070.17430

21、.21780.26140.30500.34850.39210.4356500.05450.10890.16340.21780.27230.32670.38120.43560.49010.5445600.06540.13070.19610.26140.32670.39210.45740.52280.58810.6534700.07630.15250.22870.30500.38120.45740.53370.6100.68610.7623800.08720.17430.26140.34850.43560.52280.60990.69700.78410.8712900.09810.19610.29

22、410.39210.49010.58810.68610.78410.88210.9801 物料垂直提升运输功率N3值表 表8 （kw） Q(t/h)H（m）10203040506070809010010.02730.05460.08190.10920.13650.16380.19110.21840.24570.27320.05460.10920.16380.21840.27300.32760.38220.43680.49140.54630.08190.16380.24570.32760.40950.49140.57330.65520.73710.81940.10920.21840.32760.

23、43680.5460.65520.76440.87360.98281.09250.13650.2730.40950.5460.68250.8190.95551.0921.22851.36560.16380.32760.49140.65520.8190.98281.14661.31041.47421.63870.19110.38220.57330.76440.95551.14661.33771.52881.71991.91180.21840.43680.65520.87361.0921.31041.52881.74721.96562.18490.24570.49140.73710.98281.2

24、2851.47421.71991.96562.21132.457 卸料器及导料槽附加功率N4值表 表9 （kw）带宽B（mm）500650800100012001400N4（kw）卸料器0.3n0.4n0.5n1.0n导料槽0.08L0.08L0.09L0.1L0.12L0.18L 附加功率系数k3值表 表10 Lh（m） 15304560100150200300300002.82.11.81.61.551.51.41.31.2601.71.41.31.251.251.21.21.151.151201.451.251.251.21.21.151.151.141.142001.31.21.151

25、.151.151.131.131.11.1 胶带机输送能力Q值表 表11 （t/h）带速（m/s）0.81.01.251.62.02.5B=500mm7897122156191232B=650mm131164206264323391B=800mm278348445546661B=1000mm4355446968531033B=1200mm655819104812841556筛分用水指标和水压要求筛分机前的水压力要求应不小于2kg/cm2。冲洗用水指标根据毛料的含砂率选择确定，最佳范围如下表，在实际应用中乘以1.5的系数。毛料的含砂率 （%） 1 m3毛料冲洗用水量 （t）00.160.26100.460.69200.750.97300.921.07401.001.16砂石料自然休止角名 称干 态湿 态细 度 模 数细 砂303532102.21.6中 砂2830352.33.0粗 砂2530353.13.7碎 石35453540砾 石354035砂石料的堆积角和自卸角物 料 特 性含 水 量堆 积 角自 卸 角以砾石为主的毛料2%405055以砂为主的毛料38%386065筛分后的砾石323545粗砂（FM3）3545中砂（FM2.5）10%355055细砂（FM=11.5）20%356065破碎产品碎石4050成品碎石料353650