PAGE95/NUMPAGES961設計條件及設計任務1.1選煤廠類型及工作制度礦井型煉焦煤選煤廠，年生產能力1.8Mt/a，每年工作330天，二班生產一班檢修，每天選煤16h，要緊供發電廠和民用。1.2煤層及煤質條件開采甲乙兩層煤，按固定比例混合入選，粒度和密度組成見篩分和浮沉試驗結果表，煤層系數=35/65。1.3煤質資料綜合計算1.3.1篩分資料綜合1）分不將甲、乙煤層篩分試驗結果表計算完畢。2）按自己的煤層分配系數將甲、乙兩煤層篩分試驗綜合成一個“兩層煤篩分試驗結果綜合表”。3）依照“兩層煤篩分試驗結果綜合表”完成“兩層煤+50mm破裂級篩分試驗結果綜合表”。4）完成“兩層煤破裂級與自然級篩分試驗結果綜合表”。1.3.2浮沉資料綜合1）分不完成“甲煤層自然級篩分浮沉試驗報告表”和“甲煤層破裂級篩分浮沉試驗報告表”計算。2）完成“甲煤層自然級與破裂級浮沉試驗綜合表”計算。3）分不完成“乙煤層自然級篩分浮沉試驗報告表”和“乙煤層破裂級篩分浮沉試驗報告表”計算。4）完成“乙煤層自然級與破裂級浮沉試驗綜合表”計算。5）完成“兩煤層50~0.5mm級浮沉試驗綜合表”計算。1.3.3煤的可選性評定。依照“兩煤層50~0.5mm級浮沉試驗綜合表”完成“產率、灰分、浮沉物及鄰近物密度組成表”（例表見選礦學P279頁），并依照此表繪制出原煤可選性曲線。依照擬定精煤灰分（）和矸石灰分（），分不求出精煤、中煤和矸石的產率和灰分，精煤和中煤分界灰分，理論分選密度和對煤的可選性做出評定。1.3.4選煤方法及產品定位依照原煤種類，參照各工業分析指標及原煤篩分資料確定選煤產品的要緊用途，并闡述其確定理由。依照原煤料度組成和不同灰分指標下各產物產率，采納比選方法確定出選煤產品結構方案。要求擬定三個以上預選方案，依照不同種類、不同灰分煤炭產品銷售基價，結合不同質量情況下的產品產率，求出最優方案。最后依照所選方案做出選煤產品理論平衡表。產品結構方案論證方法：預選2~3個不同工藝結構的選煤方法，設為方案A，方案B，和方案C。依照所確定出的產品用途，確定出高中低三種不同灰分精煤產品，定為方案I，方案II，方案III。最高、最低和灰分間隔大小視煤種和浮、沉物產率綜合確定。上述方案可組六個不同結構的備選方案：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工藝流程制定依照煤的品種、用途和可選性，從原煤預備開始，制定出完整選煤工藝流程，畫出工藝流程圖，并對要緊工藝流程確定進行講明。1.3.6工藝流程計算依照所制定出的工藝流程，對各個作業進行數質量計算。2煤質資料綜合與分析2.1篩分資料綜合與分析2.1.1篩分試驗資料審查，綜合與灰分校正對原始大篩分資料的數據和結果進行審查，將錯誤的數據和結果改正過來，然后依照入選比例將所有入選煤層大篩分資料綜合成一個結果。當原煤最大粒度大于入選上限，對大于入選上限的煤需要進行破裂后入選時，須對破裂級那部分煤的篩分試驗資料進行綜合。關于缺少大于入選上限煤的破裂篩分資料時，則假設破裂后的粒度組成與同煤層原煤自然級粒度組成相同，各粒度級灰分用大于入選上限灰分進行校正。綜合過程簡單敘述如下：關于自然級來講，確定各層煤在入廠（選）原煤中所占的百分數表2-3中，。。將各層煤占本層煤的粒度級不分不換算成占入廠（選）原煤的百分數如表2-3中第4欄和第7欄。將占全樣各個數值按等粒級相加，即得原煤各粒級的含量。如表2-3中綜合后各粒度級的灰分用加權平均法計算，例如，表2-3中，第11欄各行為關于破裂級來講，從表2-3中，能夠確定破裂級各煤層在入廠原煤中所占的百分數如2-2中，。然后將破裂級資料用同樣的方法換算成占入選原煤的百分數進行綜合，將自然級和破裂級的數量和灰分進行綜合，其結果填入表2-7中。表2-1甲煤層篩分試驗結果表Tablet.2-1sizeconsistofrawcoalforfirstcoalbed粒級（mm）產物名稱點全樣灰分（%）Ad(%)>100手選煤5.9818.25夾矸煤矸石4.0183.27小計9.9944.35100-50手選煤7.7224.56夾矸煤矸石3.5782.5小計11.2942.88>50合計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合計78.7228.78總計100.0031.93表2-2乙煤層篩分試驗結果表Tablet.2-2sizeconsistofrawcoalforsecondcoalbed粒級（mm）產物名稱點全樣灰分（%）Ad(%)>100手選煤9.2325.28夾矸煤矸石3.9881.45小計13.2142.20100-50手選煤10.9430.45夾矸煤矸石5.7880.56小計16.7247.77>50合計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合計70.0732.77總計100.0036.53表2-3兩層原煤篩分試驗結果綜合表Tab.2-3Tableofanalysisofthesynthesiscoalsievetest粒級（mm）產物名稱甲層（KA＝35%）本層全樣Ad/%/%/%12345>100手選煤5.982.0918.25夾矸煤矸石4.011.4083.27小計9.993.5044.30100-50手選煤7.722.7024.56夾矸煤矸石3.571.2582.5小計11.293.9542.90>50合計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合計78.7227.5528.79毛煤總計100.0035.0027.50乙層（KB＝65%）綜合（K＝100%）本層全樣Ad本級全樣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甲層破裂篩分試驗結果表Tablet.2-4sizeconsistofrawcoalforfirstcoalbed粒級占本級占本層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總計100.0021.2828.7843.57表2-5乙層破裂篩分試驗結果表Tablet.2-5sizeconsistofrawcoalforsecondcoalbed粒級占本級占本層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總計100.0029.9332.7745.31表2-6甲、乙兩層原煤+50mm破裂級篩分試驗結果綜合表Table.2-6Atwo-tierlevelofcoalcrushingcomprehensivetestresults粒級/mm甲層（K1＝7.45%）乙層（K2＝19.45%）占本層占本級占全樣Ad占本層占本級占全樣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合計21.28100.007.4543.5729.93100.0019.4545.31綜合（K＝26.90%）占本級占全樣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2-7兩層原煤破裂級與自然級篩分試驗結果綜合表Tab.2-7Atwo-tierlevelofcoalcrushingandscreeningnatural-scalecomprehensivetestresults粒級/mm自然級破裂級占本層占全樣Ad占本層占全樣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合計100.0073.1031.27100.0026.9044.84綜合占本級占全樣Ad灰分/%/%/%89101124.1824.1844.1150-0.5mm灰分為36.03%20.6720.6738.8616.8116.8133.3216.8816.8829.9511.7511.7527.079.709.7024.59100.00100.0034.922.1.2篩分資料綜合結果分析依照篩分資料綜合結果繪制入選原煤粒度曲線，對粒度組成，物理和化學特性及對選煤產品結構的阻礙程度做出詳細評價。圖2-1粒度特性曲線Figure2-1granularitycharacteristiccurve2.2浮沉資料綜合與灰分校正2.2.1浮沉資料綜合浮沉試驗資料綜合的原則與方法和篩分資料相似，是按等密度級綜合的原則進行。簡單敘述如下：1）將自然級、破裂級中各密度級所占本級質量百分數換算成占全樣的質量百分數，然后按等密度級相加得該煤層自然級和破裂級0.5~50mm的綜合浮沉質量百分數，如表2-8、表2-9、表2-10和表2-11中第3欄、第6欄、第9欄、第12欄和第15欄。綜合的密度級的灰分用加權平均法求出。2）將占本層全樣第18欄換算成占入選全樣第19欄，其比列分不從表2-3中得出。3）將本層自然級和破裂級進行綜合，只要將自然級和破裂級分不綜合后的總量進行綜合即可。見表2-12、表2-13。4）將兩層煤的自然級和破裂級分不綜合得到浮沉資料見表2-14。2.2.2浮沉資料的灰分校正浮沉資料的校正通常用調出量法。校正的基準為篩分綜合表中的相應粒級綜合校正灰分值為準。注意煤泥灰分不校正，則式中--灰分校正系數，此值可正、可負，%--篩分表中參加浮沉各粒級的綜合校正灰分減去綜合浮沉表中浮沉煤泥的灰分，%--綜合浮沉表中各密度級累計灰分（去泥），%而%=36.34%校正前后的灰分仍為除去浮沉煤泥的灰分，但其方法假定各密度級灰分不變，調整各密度級質量百分數。即，1）+1.8kg/L密度級質量百分數增加x%，同時相應減少-1.8kg/L密度級的質量百分數x%，其總質量百分數仍為100%。增減x%后，建立新的平衡關系如下化簡后，得：式中，x—校正值，%--篩分表中參加浮沉各粒級的綜合校正灰分減去綜合浮沉表中浮沉煤泥的灰分，%--綜合浮沉表中各密度級累計灰分（去泥），%--+1.8kg/L密度級灰分，%---1.8kg/L密度級灰分，%而2）按校正值x將大于+1.8kg/L和-1.8kg/L密度級的質量百分數進行調整。考慮到x應按比例分配到+1.8kg/L和-1.8kg/L各密度級中去則有：式中--分不為+1.8kg/L密度級調整后和調整前的質量百分數，%；--分不為-1.8kg/L密度級調整后和調整前的質量百分數，%。假如+1.8kg/L密度級不中，不止一個密度級，也參照-1.8kg/L密度級的算法。表2-8甲層煤自然級篩分浮沉試驗報告表Tablet.2-8float-sinktestoffirstcoalbed篩分50-25mm25-13mm13-6mm浮沉產率%灰分%產率%灰分%產率%灰分%15.8035.3614.5230.7412.9429.58密度級本級全樣灰分本級全樣灰分本級全樣灰分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小計100.0015.5135.81100.0014.2631.24100.0012.6029.88煤泥1.840.2923.851.780.2624.122.640.3423.70總計100.0015.8035.59100.0014.5231.11100.0012.9429.726-3mm3-0.5mm0.5-50mm產率%灰分%產率%灰分%產率%灰分%17.5526.199.5925.0570.4029.65本級全樣灰分本級全樣灰分本級全樣占入選全樣灰分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甲層煤破裂級篩分浮沉試驗報告表Tablet.2-9float-sinktestoffirstcoalbed篩分50-25mm25-13mm13-6mm浮沉產率%灰分%產率%灰分%產率%灰分%4.2750.153.9345.533.5044.37密度級本級全樣灰分本級全樣灰分本級全樣灰分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小計100.004.1950.37100.003.8645.66100.003.4144.53煤泥1.840.0838.411.780.0738.542.640.0938.32總計100.004.2750.13100.003.9345.51100.003.5044.406-3mm3-0.5mm0.5-50mm產率%灰分%產率%灰分%產率%灰分%4.7440.982.5939.8419.0344.44本級全樣灰分本級全樣灰分本級全樣占入選全樣灰分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乙層煤自然級篩分浮沉試驗報告表Tablet.2-10float-sinktestofsecondcoalbed篩分50-25mm25-13mm13-6mm浮沉產率%灰分%產率%灰分%產率%灰分%18.5142.6415.3237.3511.9229.87密度級本級全樣灰分本級全樣灰分本級全樣灰分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小計100.0018.2842.70100.0015.1137.43100.0011.6429.89煤泥1.250.2321.981.380.2121.852.350.2824.80總計100.0018.5142.44100.0015.3237.21100.0011.9229.776-3mm3-0.5mm0.5-50mm產率%灰分%產率%灰分%產率%灰分%9.7826.708.0722.6563.6033.98本級全樣灰分本級全樣灰分本級全樣占入選全樣灰分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乙層煤破裂級篩分浮沉試驗報告表Tablet.2-11float-sinktestofsecondcoalbed篩分50-25mm25-13mm13-6mm浮沉產率%灰分%產率%灰分%產率%灰分%7.9155.186.5449.895.0942.41密度級本級全樣灰分本級全樣灰分本級全樣灰分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小計100.007.8155.43100.006.4550.11100.004.9742.52煤泥1.250.1034.721.380.0934.532.350.1237.44總計100.007.9155.17100.006.5449.89100.005.0942.406-3mm3-0.5mm0.5-50mm產率%灰分%產率%灰分%產率%灰分%4.1839.243.4535.1927.1746.52本級全樣灰分本級全樣灰分本級全樣占入選全樣灰分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甲層煤自然級與破裂級浮沉試驗綜合表Tab.2-12Tablesofthefirst-storycoal-andnatural-driftingbrokenExperiment密度級自然級破裂級綜合/kg·L-1占本級占全樣Ad占本級占全樣Ad占本級占全樣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小計(去泥)100.0024.1230.36100.006.6244.60100.0030.7433.42煤泥2.110.5225.090.600.0439.211.790.5626.10總計100.0024.6430.20100.006.6644.44100.0031.3033.29表2-13乙層煤自然級與破裂級浮沉試驗綜合表Tab.2-13Tableofsecondlayerofcoalandnatural-leveldriftingbrokenExperiment密度級自然級破裂級綜合/kg·L-1占本級占全樣Ad占本級占全樣Ad占本級占全樣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小計(去泥)100.0040.8134.08100.0017.5646.72100.0058.3737.88煤泥1.280.5324.810.570.1037.411.070.6326.81總計100.0041.3433.89100.0017.6646.53100.0059.0037.76表2-14甲.乙兩層煤50-0.5mm級浮沉試驗綜合表Tab.2-14Tablesoftwocoal0.5-50mm-ManExperiment密度級甲層乙層/kg·L-1占本級占全樣Ad占本級占全樣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小計(去煤泥)100.0030.7433.42100.0058.3737.88煤泥1.790.5626.101.070.6326.81總計100.0031.3033.29100.0059.0037.76綜合校正占本級占全樣Ad占本級占全樣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原煤可選性評定與工藝流程制定3.1可選性曲線評定與產品結構依照“浮沉試驗綜合結果表2-14”的計算，做出入選煤層0.5~50mm粒級浮沉試驗綜合表”。見表3-1。表3-10.5-50mm粒級原煤浮沉試驗綜合表Tab.3-1Tablesoftwocoal0.5-50mm-ManExperiment密度級產率Ad累計分選密度±0.1浮物沉物/%/%產率Ad產率Ad密度級產率/%/%/%/%/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