煤质文件与工艺流程设计

PAGE95/NUMPAGES961设计条件及设计任务1.1选煤厂类型及工作制度矿井型炼焦煤选煤厂，年生产能力1.8Mt/a，每年工作330天，二班生产一班检修，每天选煤16h，要紧供发电厂和民用。1.2煤层及煤质条件开采甲乙两层煤，按固定比例混合入选，粒度和密度组成见筛分和浮沉试验结果表，煤层系数=35/65。1.3煤质资料综合计算1.3.1筛分资料综合1）分不将甲、乙煤层筛分试验结果表计算完毕。2）按自己的煤层分配系数将甲、乙两煤层筛分试验综合成一个“两层煤筛分试验结果综合表”。3）依照“两层煤筛分试验结果综合表”完成“两层煤+50mm破裂级筛分试验结果综合表”。4）完成“两层煤破裂级与自然级筛分试验结果综合表”。1.3.2浮沉资料综合1）分不完成“甲煤层自然级筛分浮沉试验报告表”和“甲煤层破裂级筛分浮沉试验报告表”计算。2）完成“甲煤层自然级与破裂级浮沉试验综合表”计算。3）分不完成“乙煤层自然级筛分浮沉试验报告表”和“乙煤层破裂级筛分浮沉试验报告表”计算。4）完成“乙煤层自然级与破裂级浮沉试验综合表”计算。5）完成“两煤层50~0.5mm级浮沉试验综合表”计算。1.3.3煤的可选性评定。依照“两煤层50~0.5mm级浮沉试验综合表”完成“产率、灰分、浮沉物及邻近物密度组成表”（例表见选矿学P279页），并依照此表绘制出原煤可选性曲线。依照拟定精煤灰分（）和矸石灰分（），分不求出精煤、中煤和矸石的产率和灰分，精煤和中煤分界灰分，理论分选密度和对煤的可选性做出评定。1.3.4选煤方法及产品定位依照原煤种类，参照各工业分析指标及原煤筛分资料确定选煤产品的要紧用途，并阐述其确定理由。依照原煤料度组成和不同灰分指标下各产物产率，采纳比选方法确定出选煤产品结构方案。要求拟定三个以上预选方案，依照不同种类、不同灰分煤炭产品销售基价，结合不同质量情况下的产品产率，求出最优方案。最后依照所选方案做出选煤产品理论平衡表。产品结构方案论证方法：预选2~3个不同工艺结构的选煤方法，设为方案A，方案B，和方案C。依照所确定出的产品用途，确定出高中低三种不同灰分精煤产品，定为方案I，方案II，方案III。最高、最低和灰分间隔大小视煤种和浮、沉物产率综合确定。上述方案可组六个不同结构的备选方案：方案AI；方案AII；方案AIII；方案BI；方案BII；方案BIII。或方案IA；方案IB；方案IIA；方案IIB；方案IIIA；方案IIIB。1.3.5工艺流程制定依照煤的品种、用途和可选性，从原煤预备开始，制定出完整选煤工艺流程，画出工艺流程图，并对要紧工艺流程确定进行讲明。1.3.6工艺流程计算依照所制定出的工艺流程，对各个作业进行数质量计算。2煤质资料综合与分析2.1筛分资料综合与分析2.1.1筛分试验资料审查，综合与灰分校正对原始大筛分资料的数据和结果进行审查，将错误的数据和结果改正过来，然后依照入选比例将所有入选煤层大筛分资料综合成一个结果。当原煤最大粒度大于入选上限，对大于入选上限的煤需要进行破裂后入选时，须对破裂级那部分煤的筛分试验资料进行综合。关于缺少大于入选上限煤的破裂筛分资料时，则假设破裂后的粒度组成与同煤层原煤自然级粒度组成相同，各粒度级灰分用大于入选上限灰分进行校正。综合过程简单叙述如下：关于自然级来讲，确定各层煤在入厂（选）原煤中所占的百分数表2-3中，。。将各层煤占本层煤的粒度级不分不换算成占入厂（选）原煤的百分数如表2-3中第4栏和第7栏。将占全样各个数值按等粒级相加，即得原煤各粒级的含量。如表2-3中综合后各粒度级的灰分用加权平均法计算，例如，表2-3中，第11栏各行为关于破裂级来讲，从表2-3中，能够确定破裂级各煤层在入厂原煤中所占的百分数如2-2中，。然后将破裂级资料用同样的方法换算成占入选原煤的百分数进行综合，将自然级和破裂级的数量和灰分进行综合，其结果填入表2-7中。表2-1甲煤层筛分试验结果表Tablet.2-1sizeconsistofrawcoalforfirstcoalbed粒级（mm）产物名称点全样灰分（%）Ad(%)>100手选煤5.9818.25夹矸煤矸石4.0183.27小计9.9944.35100-50手选煤7.7224.56夹矸煤矸石3.5782.5小计11.2942.88>50合计21.2843.5750-25煤15.835.3625-13煤14.5230.7413-6.0煤12.9429.586.0-3.0煤17.5526.193.0-0.5煤9.5925.050.5-0.0煤8.3221.4150-0合计78.7228.78总计100.0031.93表2-2乙煤层筛分试验结果表Tablet.2-2sizeconsistofrawcoalforsecondcoalbed粒级（mm）产物名称点全样灰分（%）Ad(%)>100手选煤9.2325.28夹矸煤矸石3.9881.45小计13.2142.20100-50手选煤10.9430.45夹矸煤矸石5.7880.56小计16.7247.77>50合计29.9345.3150-25煤18.5142.6425-13煤15.3237.3513-6.0煤11.9229.876.0-3.0煤9.7826.73.0-0.5煤8.0722.650.5-0.0煤6.4720.8550-0合计70.0732.77总计100.0036.53表2-3两层原煤筛分试验结果综合表Tab.2-3Tableofanalysisofthesynthesiscoalsievetest粒级（mm）产物名称甲层（KA＝35%）本层全样Ad/%/%/%12345>100手选煤5.982.0918.25夹矸煤矸石4.011.4083.27小计9.993.5044.30100-50手选煤7.722.7024.56夹矸煤矸石3.571.2582.5小计11.293.9542.90>50合计21.287.4522.7450-25煤15.805.5335.3625-13煤14.525.0830.7413-6.0煤12.944.5329.586.0-3.0煤17.556.1426.193.0-0.5煤9.593.3625.050.5-0.0煤8.322.9121.4150-0合计78.7227.5528.79毛煤总计100.0035.0027.50乙层（KB＝65%）综合（K＝100%）本层全样Ad本级全样Ad/%/%/%/%/%/%678910119.236.0025.288.098.0923.463.982.5981.453.993.9982.0913.218.5942.2012.0812.0842.8210.947.1130.459.819.8128.835.783.7680.565.015.0181.0416.7210.8747.7714.8214.8246.4729.9319.4545.3126.9026.9044.8318.5112.0342.6417.5617.5640.3515.329.9637.3515.0415.0435.1211.927.7529.8712.2812.2829.769.786.3626.7012.5012.5026.458.075.2522.658.608.6023.596.474.2120.857.127.1221.0870.0745.5532.7773.1073.1031.27100.0065.0036.53100.00100.0034.92表2-4甲层破裂筛分试验结果表Tablet.2-4sizeconsistofrawcoalforfirstcoalbed粒级占本级占本层Ad校正/%/%/%50-2520.074.2735.3650.1525-1318.453.9330.7445.5313-6.016.443.5029.5844.376.0-3.022.294.7426.1940.983.0-0.512.182.5925.0539.840.5-0.010.572.2521.4136.20总计100.0021.2828.7843.57表2-5乙层破裂筛分试验结果表Tablet.2-5sizeconsistofrawcoalforsecondcoalbed粒级占本级占本层Ad校正/%/%/%50-2526.427.9142.6455.1825-1321.866.5437.3549.8913-6.017.015.0929.8742.416.0-3.013.964.1826.7039.243.0-0.511.523.4522.6535.190.5-0.09.232.7620.8533.39总计100.0029.9332.7745.31表2-6甲、乙两层原煤+50mm破裂级筛分试验结果综合表Table.2-6Atwo-tierlevelofcoalcrushingcomprehensivetestresults粒级/mm甲层（K1＝7.45%）乙层（K2＝19.45%）占本层占本级占全样Ad占本层占本级占全样Ad/%%/%/%/%/%%/%12345678950-254.2720.071.4850.157.9126.435.1455.1825-133.9318.471.3845.536.5421.854.2549.8913-6.03.5016.451.2344.375.0917.013.3142.416.0-3.04.7422.271.6640.984.1813.972.7239.243.0-0.52.5912.170.9139.843.4511.532.2435.190.5-0.02.2510.570.7936.202.769.221.7933.3950-0合计21.28100.007.4543.5729.93100.0019.4545.31综合（K＝26.90%）占本级占全样Ad校正/%/%/%1011121324.616.6254.0654.0920.935.6348.8248.8516.844.5342.9442.9716.284.3839.9039.9311.713.1536.5336.569.632.5834.2534.28100.0026.9044.8044.83表2-7两层原煤破裂级与自然级筛分试验结果综合表Tab.2-7Atwo-tierlevelofcoalcrushingandscreeningnatural-scalecomprehensivetestresults粒级/mm自然级破裂级占本层占全样Ad占本层占全样Ad/%/%/%/%/%/%123456750-2524.0217.5640.3524.616.6254.0925-1320.5715.0435.1220.935.6348.8513-6.016.8012.2829.7616.844.5342.976.0-3.017.1012.5026.4516.284.3839.933.0-0.511.768.6023.5911.713.1536.560.5-0.09.747.1221.089.632.5834.2850-0合计100.0073.1031.27100.0026.9044.84综合占本级占全样Ad灰分/%/%/%89101124.1824.1844.1150-0.5mm灰分为36.03%20.6720.6738.8616.8116.8133.3216.8816.8829.9511.7511.7527.079.709.7024.59100.00100.0034.922.1.2筛分资料综合结果分析依照筛分资料综合结果绘制入选原煤粒度曲线，对粒度组成，物理和化学特性及对选煤产品结构的阻碍程度做出详细评价。图2-1粒度特性曲线Figure2-1granularitycharacteristiccurve2.2浮沉资料综合与灰分校正2.2.1浮沉资料综合浮沉试验资料综合的原则与方法和筛分资料相似，是按等密度级综合的原则进行。简单叙述如下：1）将自然级、破裂级中各密度级所占本级质量百分数换算成占全样的质量百分数，然后按等密度级相加得该煤层自然级和破裂级0.5~50mm的综合浮沉质量百分数，如表2-8、表2-9、表2-10和表2-11中第3栏、第6栏、第9栏、第12栏和第15栏。综合的密度级的灰分用加权平均法求出。2）将占本层全样第18栏换算成占入选全样第19栏，其比列分不从表2-3中得出。3）将本层自然级和破裂级进行综合，只要将自然级和破裂级分不综合后的总量进行综合即可。见表2-12、表2-13。4）将两层煤的自然级和破裂级分不综合得到浮沉资料见表2-14。2.2.2浮沉资料的灰分校正浮沉资料的校正通常用调出量法。校正的基准为筛分综合表中的相应粒级综合校正灰分值为准。注意煤泥灰分不校正，则式中--灰分校正系数，此值可正、可负，%--筛分表中参加浮沉各粒级的综合校正灰分减去综合浮沉表中浮沉煤泥的灰分，%--综合浮沉表中各密度级累计灰分（去泥），%而%=36.34%校正前后的灰分仍为除去浮沉煤泥的灰分，但其方法假定各密度级灰分不变，调整各密度级质量百分数。即，1）+1.8kg/L密度级质量百分数增加x%，同时相应减少-1.8kg/L密度级的质量百分数x%，其总质量百分数仍为100%。增减x%后，建立新的平衡关系如下化简后，得：式中，x—校正值，%--筛分表中参加浮沉各粒级的综合校正灰分减去综合浮沉表中浮沉煤泥的灰分，%--综合浮沉表中各密度级累计灰分（去泥），%--+1.8kg/L密度级灰分，%---1.8kg/L密度级灰分，%而2）按校正值x将大于+1.8kg/L和-1.8kg/L密度级的质量百分数进行调整。考虑到x应按比例分配到+1.8kg/L和-1.8kg/L各密度级中去则有：式中--分不为+1.8kg/L密度级调整后和调整前的质量百分数，%；--分不为-1.8kg/L密度级调整后和调整前的质量百分数，%。假如+1.8kg/L密度级不中，不止一个密度级，也参照-1.8kg/L密度级的算法。表2-8甲层煤自然级筛分浮沉试验报告表Tablet.2-8float-sinktestoffirstcoalbed筛分50-25mm25-13mm13-6mm浮沉产率%灰分%产率%灰分%产率%灰分%15.8035.3614.5230.7412.9429.58密度级本级全样灰分本级全样灰分本级全样灰分12345678910<1.318.352.856.5620.952.996.3326.323.326.131.3-1.425.984.037.9828.964.137.8524.893.148.571.4-1.57.521.1714.997.051.0117.128.151.0315.981.5-1.66.831.0624.156.750.9623.266.780.8524.151.6-1.74.320.6734.034.850.6934.854.730.6036.131.7-1.84.010.6245.183.430.4943.983.240.4145.25>1.832.995.1280.2428.013.9977.3525.893.2677.32小计100.0015.5135.81100.0014.2631.24100.0012.6029.88煤泥1.840.2923.851.780.2624.122.640.3423.70总计100.0015.8035.59100.0014.5231.11100.0012.9429.726-3mm3-0.5mm0.5-50mm产率%灰分%产率%灰分%产率%灰分%17.5526.199.5925.0570.4029.65本级全样灰分本级全样灰分本级全样占入选全样灰分1112131415161718192032.585.505.6935.973.255.5626.2217.906.325.9922.763.849.5623.962.179.1225.3417.306.118.556.851.1616.845.650.5115.047.134.871.7216.086.781.1425.126.020.5423.156.694.561.6124.095.320.9036.153.580.3234.564.663.181.1235.252.150.3644.953.010.2742.973.162.150.7644.6023.563.9875.8921.811.9774.8226.8318.326.4777.56100.0016.8827.66100.009.0425.28100.0068.2824.1230.363.840.6725.025.780.5527.153.012.120.5225.09100.0017.5527.55100.009.5925.39100.0070.4024.6430.18表2-9甲层煤破裂级筛分浮沉试验报告表Tablet.2-9float-sinktestoffirstcoalbed筛分50-25mm25-13mm13-6mm浮沉产率%灰分%产率%灰分%产率%灰分%4.2750.153.9345.533.5044.37密度级本级全样灰分本级全样灰分本级全样灰分12345678910<1.318.350.7721.1220.950.8120.7526.320.9020.751.3-1.425.981.0922.5428.961.1222.2724.890.8523.191.4-1.57.520.3229.557.050.2731.548.150.2830.601.5-1.66.830.2938.716.750.2637.686.780.2338.771.6-1.74.320.1848.594.850.1949.274.730.1650.751.7-1.84.010.1759.743.430.1358.403.240.1159.87>1.832.991.3894.8028.011.0891.7725.890.8891.94小计100.004.1950.37100.003.8645.66100.003.4144.53煤泥1.840.0838.411.780.0738.542.640.0938.32总计100.004.2750.13100.003.9345.51100.003.5044.406-3mm3-0.5mm0.5-50mm产率%灰分%产率%灰分%产率%灰分%4.7440.982.5939.8419.0344.44本级全样灰分本级全样灰分本级全样占入选全样灰分1112131415161718192032.581.4919.1235.970.8820.0126.224.841.7420.1722.761.0422.9923.960.5923.5725.344.681.6822.826.850.3130.275.650.1429.497.121.320.4730.356.780.3138.556.020.1537.606.681.230.4438.335.320.2449.583.580.0949.014.660.860.3149.472.150.1058.383.010.0757.423.150.580.2158.9423.561.0789.3221.810.5389.2726.834.951.7891.84100.004.5641.09100.002.4539.70100.0018.476.6244.603.840.1838.455.780.1441.602.950.560.0439.21100.004.7440.98100.002.5939.80100.0019.036.6644.44表2-10乙层煤自然级筛分浮沉试验报告表Tablet.2-10float-sinktestofsecondcoalbed筛分50-25mm25-13mm13-6mm浮沉产率%灰分%产率%灰分%产率%灰分%18.5142.6415.3237.3511.9229.87密度级本级全样灰分本级全样灰分本级全样灰分12345678910<1.35.060.927.058.351.266.9818.012.106.581.3-1.425.464.6511.5527.854.2111.8528.323.3011.561.4-1.59.101.6618.1410.351.5618.5610.021.1717.961.5-1.67.251.3326.875.780.8727.056.550.7625.541.6-1.78.151.4933.768.121.2333.997.500.8734.101.7-1.82.990.5540.954.010.6142.153.850.4541.15>1.841.997.6875.8035.545.3772.0525.753.0069.18小计100.0018.2842.70100.0015.1137.43100.0011.6429.89煤泥1.250.2321.981.380.2121.852.350.2824.80总计100.0018.5142.44100.0015.3237.21100.0011.9229.776-3mm3-0.5mm0.5-50mm产率%灰分%产率%灰分%产率%灰分%9.7826.708.0722.6563.6033.98本级全样灰分本级全样灰分本级全样占入选全样灰分1112131415161718192023.182.204.9932.012.494.5814.418.985.885.7427.022.5610.5824.501.9110.5626.6916.6310.8911.3612.381.1716.9510.450.8118.1510.246.384.1817.995.960.5726.186.180.4825.026.434.012.6326.346.210.5934.245.990.4733.157.464.653.0433.882.850.2740.873.150.2539.583.402.121.3941.1722.402.1370.2517.721.3866.8931.3719.5512.8072.52100.009.4926.71100.007.7922.58100.0062.3140.8134.082.980.2927.153.450.2826.972.031.290.5324.81100.009.7826.72100.008.0722.73100.0063.6041.3433.89表2-11乙层煤破裂级筛分浮沉试验报告表Tablet.2-11float-sinktestofsecondcoalbed筛分50-25mm25-13mm13-6mm浮沉产率%灰分%产率%灰分%产率%灰分%7.9155.186.5449.895.0942.41密度级本级全样灰分本级全样灰分本级全样灰分12345678910<1.35.060.4019.798.350.5419.6618.010.9019.221.3-1.425.461.9924.2927.851.8024.5328.321.4124.201.4-1.59.100.7130.8810.350.6731.2410.020.5030.601.5-1.67.250.5739.615.780.3739.736.550.3338.181.6-1.78.150.6446.508.120.5246.677.500.3746.741.7-1.82.990.2353.694.010.2654.833.850.1953.79>1.841.993.2888.5435.542.2984.7325.751.2881.82小计100.007.8155.43100.006.4550.11100.004.9742.52煤泥1.250.1034.721.380.0934.532.350.1237.44总计100.007.9155.17100.006.5449.89100.005.0942.406-3mm3-0.5mm0.5-50mm产率%灰分%产率%灰分%产率%灰分%4.1839.243.4535.1927.1746.52本级全样灰分本级全样灰分本级全样占入选全样灰分1112131415161718192023.180.9417.5132.011.0717.0414.413.842.5318.3227.021.1023.1024.500.8223.0226.697.114.6924.0012.380.5029.4710.450.3530.6110.242.731.8030.625.960.2438.706.180.2137.486.431.711.1338.986.210.2546.765.990.2045.617.461.981.3146.532.850.1253.393.150.1052.043.400.900.6053.8122.400.9182.7717.720.5979.3531.378.355.5185.19100.004.0639.27100.003.3335.03100.0026.6217.5646.722.980.1239.673.450.1239.432.030.550.1037.41100.004.1839.28100.003.4535.18100.0027.1717.6646.53表2-12甲层煤自然级与破裂级浮沉试验综合表Tab.2-12Tablesofthefirst-storycoal-andnatural-driftingbrokenExperiment密度级自然级破裂级综合/kg·L-1占本级占全样Ad占本级占全样Ad占本级占全样Ad/%/%/%/%/%/%/%/%/%12345678910<1.326.206.325.9926.281.7420.1726.228.069.051.3-1.425.336.118.5525.381.6822.8225.347.7911.631.4-1.57.131.7216.087.100.4730.357.122.1919.141.5-1.66.671.6124.096.650.4438.336.672.0527.151.6-1.74.641.1235.254.680.3149.474.651.4338.331.7-1.83.150.7644.603.170.2158.943.160.9747.70>1.826.826.4777.5626.891.7891.8426.848.2580.64小计(去泥)100.0024.1230.36100.006.6244.60100.0030.7433.42煤泥2.110.5225.090.600.0439.211.790.5626.10总计100.0024.6430.20100.006.6644.44100.0031.3033.29表2-13乙层煤自然级与破裂级浮沉试验综合表Tab.2-13Tableofsecondlayerofcoalandnatural-leveldriftingbrokenExperiment密度级自然级破裂级综合/kg·L-1占本级占全样Ad占本级占全样Ad占本级占全样Ad/%/%/%/%/%/%/%/%/%12345678910<1.314.415.885.7414.412.5318.3214.418.419.521.3-1.426.6810.8911.3626.714.6924.0026.6915.5815.161.4-1.510.244.1817.9910.251.8030.6210.245.9821.791.5-1.66.442.6326.346.441.1338.986.443.7630.141.6-1.77.453.0433.887.461.3146.537.454.3537.691.7-1.83.411.3941.173.420.6053.813.411.9944.98>1.831.3612.8072.5231.385.5185.1931.3718.3176.33小计(去泥)100.0040.8134.08100.0017.5646.72100.0058.3737.88煤泥1.280.5324.810.570.1037.411.070.6326.81总计100.0041.3433.89100.0017.6646.53100.0059.0037.76表2-14甲.乙两层煤50-0.5mm级浮沉试验综合表Tab.2-14Tablesoftwocoal0.5-50mm-ManExperiment密度级甲层乙层/kg·L-1占本级占全样Ad占本级占全样Ad/%/%/%/%/%/%1234567<1.326.228.069.0514.418.419.521.3-1.425.347.7911.6326.6915.5815.161.4-1.57.122.1919.1410.245.9821.791.5-1.66.672.0527.156.443.7630.141.6-1.74.651.4338.337.454.3537.691.7-1.83.160.9747.703.411.9944.98>1.826.848.2580.6431.3718.3176.33小计(去煤泥)100.0030.7433.42100.0058.3737.88煤泥1.790.5626.101.070.6326.81总计100.0031.3033.29100.0059.0037.76综合校正占本级占全样Ad占本级占全样Ad/%/%/%/%/%/%891011121318.4816.479.2918.5616.549.2926.2323.3713.9826.3523.4813.989.178.1721.089.218.2121.086.525.8129.096.555.8429.096.495.7837.856.525.8137.853.322.9645.873.332.9745.8729.8126.5677.6729.5026.2977.67100.0089.1136.34100.0089.1136.161.321.1926.481.321.1926.48100.0090.3036.21100.0090.3036.033原煤可选性评定与工艺流程制定3.1可选性曲线评定与产品结构依照“浮沉试验综合结果表2-14”的计算，做出入选煤层0.5~50mm粒级浮沉试验综合表”。见表3-1。表3-10.5-50mm粒级原煤浮沉试验综合表Tab.3-1Tablesoftwocoal0.5-50mm-ManExperiment密度级产率Ad累计分选密度±0.1浮物沉物/%/%产率Ad产率Ad密度级产率/%/%/%/%/kg·L-1/%123456789<1.3018.569.2918.569.29100.0236.161.3044.911.30-1.4026.3513.9844.9112.0481.4642.281.4035.561.40-1.509.2121.0854.1213.5855.1155.811.5015.761.50-1.606.5529.0960.6715.2545.9062.771.6013.071.60-1.706.5237.8567.1917.45