砂石系统生产能力的确定复习过程

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11 14小时。6、成品筛洗时间：3班作业为20小时；2班作业为12 14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 土级配、各

2、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：Q a k 1系统总生产能力：P =(t/h)M N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 1.03M 月工作天数；常取25天2、系统毛料处理能力：Pm = p/n (t/h)式中：n = k2 k3 k4 k5 1+ B (k2 k3)-1P系统总生产能力；(t/h)n成品生产率；常取0.80.9k2粉砂流失系数；1.11.3k3转运损失系数；1.021.03k4冲洗损失系数；1.031.1k

3、5级配不平衡系数；1.01.1B 毛料的含砂率。3、成品砾石(碎石)生产能力：Ps = P (1B) kskz (t/h)成品砂的生产能力：Pr = Pkz(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Vo yK实体开挖总量：V二（万m3）Ao 丫（ 1 Ki） （-K2）（- K3）式中：Vo砂或砾石控制粒径的需要量；（万m3）丫 o砂或砾石控制粒径的容重；丫 一一毛料的天然容重；一般砂取 1.5 t/m3,砾石取1.6t/ m3K 级配变化系数；常取1.1Ao砂或砾石控制粒径的天然含量；K1开

4、采损耗系数；水下开采：砂取 o.35,砾石取o.o5；水上开采：砂取o.15，砾石取o.o3；K2运输、堆存损耗系数；常取 o.1K3筛分加工损耗系数；砂取 o.15,砾石取o.o3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二Qh A K2/3K1（万m3）式中：Qh混凝土最高月浇筑强度；（万m3/月）A1 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 o.552、确定砂砾石毛料堆场容积毛料堆场容积：V毛二（Qi Q2） nK

5、（万m3）式中：Qi 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;式中：Vs+VmVZ+ QsBA zVs汛期毛料开米量；（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母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：No二（N1+N2+N3） k3k4+刀N4（kw）式中：

6、No传动滚筒轴功率；（kw）Ni输送带及托辊转动部分运转功率；根据带宽B（mm）带速V（m、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）刀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 （3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：电动机功率：

7、N=K No/n式中：K功率备用系数，一般取1.4;No 传动滚筒轴功率；（kw）n 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;Vx(m/s)Lh (m)、清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.01.251.62.01.01.251.62.01.01.251.62.0100.0670.0840.1070.1340.100.1250.160.200.1340.1680.2140.268200.1340.1680.2140.2680.200.2500.320.400.2680.3360.

8、4280.536300.2010.2510.3220.4020.300.3750.480.600.4020.5040.6420.804400.2680.3350.4290.5360.400.500.640.800.5360.6720.8561.072500.3350.4190.5360.6700.500.6250.801.000.6700.841.0701.34600.4020.5030.6430.8040.600.750.961.200.8041.0081.2841.608700.4690.5860.7510.9380.700.8751.121.400.9381.1761.4981.8876

9、800.5360.6700.8581.0620.801.001.281.601.0621.3441.7122.144900.6030.7540.9651.2060.901.1251.441.801.2061.5121.9262.412Vx(m/s)Lh (m)、清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.01.251.62.01.01.251.62.01.01.251.62.0100.0820.1030.1310.1640.1240.1550.1980.2480.1650.2060.2640.330200.1640.2050.2620.3280.2480.3100.3970.4960.33

10、00.4130.5280.660300.2460.3080.3940.4920.3720.4650.5950.7440.4950.6190.7920.990400.3280.4100.5250.6560.4960.6200.7940.9920.6600.8251.0561.32500.4100.5130.6560.8200.6200.7750.9921.2400.8251.0311.3201.65600.4920.6150.7870.9840.7440.9301.1901.4880.9901.2381.5841.98700.5740.7180.9181.1480.8681.0851.3891.

11、7361.1551.4441.8482.31800.6560.8201.0501.3120.9921.241.5871.9841.3201.6502.1122.64900.7380.9231.1811.4761.1161.3951.7862.2321.4851.8562.3762.97Vx(m/s)Lh (m)、清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.01.251.62.01.01.251.62.01.01.251.62.0100.110.1380.1760.220.1650.2060.2640.330.220.2750.3520.44200.220.2750.3520.440.330

12、0.4130.5280.660.440.5500.7040.88300.330.4130.5280.660.4950.6190.7920.990.660.8251.0561.32400.440.5500.7040.880.6600.8251.0561.320.881.1001.4081.76500.550.6880.8801.100.8251.0311.3201.651.101.3751.7602.20600.660.8251.0561.320.9901.2381.5841.981.321.6502.1122.64700.770.9631.2321.541.1551.4441.8482.311

13、.541.9252.4643.08800.881.1001.4081.761.3201.6502.1122.641.762.2002.8163.52900.991.2381.5841.981.4851.8562.3762.971.982.4753.1683.96V(m/s)Lh (m)、清洁、干燥少量尘埃、正常湿度大量尘埃、湿度大1.01.251.62.01.01.251.62.01.01.251.62.0100.1530.1910.2450.3060.2290.2860.3660.4580.3060.3830.4900.612200.3060.3830.4900.6120.4580.5730

14、.7330.9160.6120.7650.9801.224300.4590.5740.7340.9180.6870.8591.0991.3740.9181.1481.4691.836400.6120.7650.9801.2240.9161.1451.4661.8321.2241.5301.9582.448500.7650.9561.2241.5301.1451.4311.8322.2901.531.9132.4483.060600.9181.1481.4691.8361.3741.7182.1982.7481.8362.2952.9383.672701.0711.3391.7142.1421.

15、6032.0042.5653.2062.1422.6783.4274.284801.2241.5301.9582.4481.8322.2902.9313.6622.4483.0603.9174.896901.3771.7212.2032.7542.0612.5763.304.1222.7543.4434.4065.508Q（t/h）Lh（ m）102030405060708090100100.005450.01090.01640.0220.02750.03270.03820.04360.04910.0545200.01090.02180.0330.0440.05450.06540.07630.

16、08720.09810.109300.016350.03270.04910.0660.08180.09810.11450.13080.14720.1635400.02180.04360.0660.0880.1090.13080.15260.17440.19620.218500.027250.05450.0820.1090.13630.16350.19080.21800.24530.2725600.03270.06540.09810.1310.16350.19620.22890.26160.29430.327700.038150.07630.1150.1530.19080.22890.26710

17、.30520.34340.3815800.04360.08720.1310.1750.2180.26160.30520.34880.39240.436900.049050.09810.14720.1970.24530.29430.34340.39240.44150.4905Q(yh)Lh (102030405060708090100100.00820.01640.02450.03270.04090.04910.05720.06540.07360.0817200.01640.03270.04910.06540.08170.09810.11440.13080.14700.1634300.02450

18、.04910.07360.09810.12260.14810.17160.19610.22060.2451400.03270.06540.09810.13080.16340.19610.22880.26150.29420.3268500.04090.08170.12260.16340.20430.24510.2860.32680.36770.4085600.04910.09810.14710.19610.24510.29420.34320.39220.44120.4902700.05720.11440.17160.22880.2860.34320.40040.45760.51470.57198

19、00.06540.13080.19610.26150.32680.39220.45760.52290.58830.6536900.07360.14710.22060.29420.36770.44120.51470.58830.66180.7353Q(yh)Lh (102030405060708090100100.01090.02180.03270.04360.05450.06540.07630.08720.09810.1089200.02180.04260.06540.08710.10890.13070.15250.17430.19610.2178300.03270.06540.09810.1

20、3070.16340.19610.22870.26140.29410.3267400.04360.08720.13070.17430.21780.26140.30500.34850.39210.4356500.05450.10890.16340.21780.27230.32670.38120.43560.49010.5445600.06540.13070.19610.26140.32670.39210.45740.52280.58810.6534700.07630.15250.22870.30500.38120.45740.53370.6100.68610.7623800.08720.1743

21、0.26140.34850.43560.52280.60990.69700.78410.8712900.09810.19610.29410.39210.49010.58810.68610.78410.88210.9801Q(t/h)H (10203040506070809010010.02730.05460.08190.10920.13650.16380.19110.21840.24570.27320.05460.10920.16380.21840.27300.32760.38220.43680.49140.54630.08190.16380.24570.32760.40950.49140.5

22、7330.65520.73710.81940.10920.21840.32760.43680.5460.65520.76440.87360.98281.09250.13650.2730.40950.5460.68250.8190.95551.0921.22851.36560.16380.32760.49140.65520.8190.98281.14661.31041.47421.63870.19110.38220.57330.76440.95551.14661.33771.52881.71991.91180.21840.43680.65520.87361.0921.31041.52881.74721.96562.18490.24570.49140.73710.98281.22851.47421.71991.96562.21132.457带宽B （ mm）500650800100012001400刀N4(kw/)卸料器0.3 n0.4 n0.5 n1.0 n导料槽0.08L0.08L0.0