煤质资料分析及数质量流程计算课程设计

《煤质资料分析及数质量流程计算课程设计》由会员分享，可在线阅读，更多相关《煤质资料分析及数质量流程计算课程设计（62页珍藏版）》请在装配图网上搜索。

1、4.0Mt/a炼焦煤选煤厂煤质资料分析及数质量流程计算辽宁工程技术大学课程设计目 录1 设计条件及设计任务11.1 选煤厂类型及工作制度11.2 煤层及煤质条件12 煤质资料综合与分析12.1 筛分资料综合与分析12.1.1 筛分试验资料审查，综合与灰分校正12.1.2 筛分资料综合结果分析152.2 浮沉资料综合与灰分校正152.2.1 浮沉资料综合152.2.2 浮沉资料的灰分校正162.2.3浮沉资料分析173原煤可选性评定与工艺流程制定253.1 可选性曲线评定与产品结构253.1.1 20013mm可选性曲线和浮沉试验结果综合表评定253.1.2 20013mm产品结构方案设计263

2、.1.3 131.5mm可选性曲线和浮沉试验结果综合表评定313.1.4 130.5mm产品结构方案设计323.2选煤方法与工艺流程的制定363.2.1原则工艺流程364 工艺流程数质量计算374.1 原煤准备作业374.1.1 预先筛分作业374.1.2 手选及破碎374.1.3 准备筛分384.2 斜轮重介分选作业394.3重介旋流器分选作业414.4 分选作业数质量计算444.4.1 斜轮重介计算444.4.2 三产品重介旋流器分选计算454.5末煤重介介质流程计算464.5.1入料悬浮液计算464.5.2补加浓介质性质计算464.5.3工作介质性质的确定464.5.4分选作业计算474

3、.5.5精煤脱介作业的计算514.5.6中煤脱介作业的计算544.5.7矸石脱介作业的计算564.5.8所需分流量、补充水量及补加浓介质的计算584.5.9煤泥旋流器分选作业计算604.5.10磁选作业计算624.6其它数质量计算634.6.1精煤脱水作业计算644.6.2煤泥浓缩计算654.6.3浮选计算664.7水量计算684.7.1煤泥浓缩684.7.2搅拌684.7.3浮选684.7.4浓缩、压滤、沉淀68参考文献：701 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4.0Mt/a，每年工作330天，二班生产一班检修，每天选煤16h。1.2 煤层及煤质条

4、件开采优劣两层煤，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=80/20。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1）筛分试验资料审查筛分资料是制定合理的选煤工艺流程、进行流程计算和作为主要设备选型的基本依据，它要有足够的代表性。用不具代表性或代表性差的筛分资料提供设计，是对设计的误导，后果是严重的。因此，对筛分资料的代表性问题应该引起高度重视。筛分资料的可靠性，对设计所选用的流程和设备起着决定性作用。现将原煤筛分资料可靠性分析如下：a）试验结果的灰分差值：筛分试验前总样灰分与试验后各粒级产物灰分的加权平均值的差值，按

5、其灰分不同、粒度不同有不同的规定。b）筛分试验的审查：检查筛分后各产物配制总样的灰分与各粒级产物灰分的加权平均值的差值是否超出下列规定，如超出，该次试验无效。当煤样灰分小于20时，相对差值不得超过10，即：当煤样灰分大于或等于20时，绝对差值不能超过2.0，即：式中 Ad 筛分后各产物配制总样所测得的灰分，； 筛分后各产物所测得的灰分加权平均值，。2）筛分试验资料综合对于自然级来说，确定各层煤在入厂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别分别换算成占入厂原煤的百分数如表2-3中第3栏和第6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

6、用加权平均法计算，例如，表2-3中，第9栏各行为对于破碎级来说，从表中，可以确定200mm破碎级各煤层在入厂原煤中所占的百分数，如表2-1中，200mm占全样的比例为K1=6.70%，将表2-3中占本级的产率乘以K1等于填入第四列中；综合表的占全样产率等于各层煤占全样产率之和，占本级产率为各粒级占全样的产率的百分数，各粒级灰分等于两层煤灰分占产率的加权平均值，灰分校正方法：将200mm没破碎的灰分填入校正合计灰分，将与原灰分做差求出，各粒级校正灰分等于原灰分加上灰分校正系数。然后将破碎级综合表中产率与校正后灰分填入表2-5中，表2-5中自然级产率灰分为-200mm筛分实验结果。15表格2- 1

7、入厂优毛煤自然级筛分组成表Table 2-1 into the factory optimal hair coal natural level size composition table粒级mm占本级占全样Ad（%）2008.386.7029.132001006.455.1629.13100508.066.4523.6550259.197.3523.7125139.17.2822.7613610.218.1721.2160.538.7831.0219.35-0.59.837.8622.21合计10080.0022.33表格2- 2 入厂劣毛煤自然级筛分组成表Table 2-2 incomin

8、g bad hair coal natural level size composition table粒级mm占本级占全样Ad（%）20016.643.3359.092001005.691.1459.09100506.191.2450.4750256.481.3050.7425136.171.2349.551367.141.4339.2860.541.528.3040.65-0.510.172.0343.8合计10020.0046.8表格2- 3 两层原煤筛分试验结果表Table 2-3 two layer coal screening test results table粒级（mm）优层（

9、KA80%）劣层（KB20%）综合（K100%）占本层占全样Ad占本层占全样Ad占本级占全样Ad/%/%/%/%/%/%/%/%/%123456789102008.386.7029.1316.643.3359.0910.0310.0339.072001006.455.1629.135.691.1459.096.306.3034.54100508.066.4523.656.191.2450.477.697.6927.975022.8918.3127.2028.525.7057.2224.0224.0234.3350259.197.3523.716.481.3050.748.658.6527.76

10、25139.107.2822.766.171.2349.558.518.5126.64136.010.218.1721.217.141.4339.289.609.6023.906.00.538.7831.0219.3541.528.3040.6539.3339.3323.850.59.837.8622.2110.172.0343.809.909.9026.652000合计91.6273.3021.7183.3616.6744.3589.9789.9725.90毛煤总计100.0080.0022.33100.0020.0046.80100.00100.0027.22 表格2- 4 两层原煤+20

11、0mm破碎级筛分试验结果综合表Table 2-4 two layer coal + 200 mm crushing stage screening test results comprehensive list粒级/mm优层（KA6.70%）劣层（KB3.33%）综合（K10.03%）占本级占本层占全样Ad本级本层占全样Ad本级占全样Ad校正/%/%/%/%/%/%/%/%/%/%/%123456789101112132001007.040.590.4736.556.831.140.2373.836.970.7048.6748.67100508.80.740.5931.077.431.240.

12、2565.228.350.8441.1641.16502510.030.840.6731.137.771.290.2665.489.280.9340.6740.6725139.930.830.6730.187.41.230.2564.299.090.9139.3939.39136.011.140.930.7528.638.571.430.2954.0310.291.0335.6535.656.00.542.333.552.8426.7749.818.291.6655.3944.814.5037.3237.320.510.730.900.7229.6312.22.030.4158.5411.22

13、1.1340.0640.06合计1008.386.7029.1310016.643.3359.09100.0010.0339.0739.07表格2- 5 两层原煤-200mm破碎级与自然级筛分试验结果综合表Table 2-5 two layer coal - 200 mm crushing stage and natural level screening test results comprehensive list粒级/mm自然级破碎级综合本层全样Ad本层全样Ad本级全样Ad/%/%/%/%/%/%/%/%/%123456789102001007.006.3034.546.970.7048

14、.677.007.0035.96100508.547.6927.978.350.8441.168.528.5229.2750259.618.6527.769.280.9340.679.589.5829.0225139.468.5126.649.090.9139.399.439.4327.882001334.6231.1528.8833.693.3842.1034.5334.5330.17136.010.679.6023.9010.291.0335.6510.6310.6325.046.00.543.7139.3323.8544.814.5037.3243.8243.8225.23130.554

15、.3848.9223.8655.105.5337.0154.4554.4525.19219.28 0.99 75.39 11.15 0.72 75.39 10.44 0.77 75.39 小计100.00 5.15 29.14 100.00 6.43 23.64 100.00 7.33 23.71 占总计99.74 5.15 29.14 99.74 6.43 23.64 99.74 7.33 23.71 煤泥0.26 0.01 25.31 0.26 0.02 25.31 0.26 0.02 25.31 总计100.00 5.16 29.13 100.00 6.45 23.65 100.00 7

16、.35 23.71 续表2-62513 mm合计产率/%灰分/%产率/%灰分/%7.28 23.71 26.24 25.74 占本级占入选灰分占本级占入选灰分/%/%/%/%/%/%/%1112131415167.80 0.57 3.89 5.91 1.55 4.35 35.48 2.57 8.64 35.83 9.37 9.26 23.01 1.67 16.13 23.47 6.14 16.63 10.38 0.75 24.58 10.12 2.65 25.14 5.72 0.41 34.08 5.72 1.50 34.42 3.31 0.24 42.93 3.12 0.82 43.09 2

17、.95 0.21 50.66 1.96 0.51 50.94 2.46 0.18 57.82 1.95 0.51 58.26 8.89 0.64 76.82 11.92 3.12 75.69 100.00 7.25 22.75 100.00 26.16 24.50 99.57 7.25 22.75 99.69 26.16 24.50 0.43 0.03 25.65 0.31 0.08 25.44 100.00 7.28 22.76 100.00 26.24 24.50 表格2- 7 20013mm优层煤破碎级浮沉资料综合表Table 2-7 200 13 mm optimal layer co

18、al crushing stage as well as the integration of data table 筛分浮沉200100 mm10050 mm5025 mm产率/%灰分/%产率/%灰分/%产率/%灰分/%0.47 36.55 0.59 31.07 0.67 31.13 密度占本级占入选灰分占本级占入选灰分占本级占入选灰分级别/%/%/%/%/%/%/%/%/%12345678910-1.34.75 0.02 4.61 5.36 0.03 4.61 5.33 0.04 4.61 1.31.432.96 0.16 9.49 37.21 0.22 9.49 36.97 0.25 9

19、.49 1.41.521.67 0.10 16.82 24.46 0.14 16.82 24.31 0.16 16.82 1.51.69.18 0.04 25.37 10.37 0.06 25.37 10.30 0.07 25.37 1.61.75.24 0.02 34.55 5.91 0.03 34.55 5.87 0.04 34.55 1.71.82.80 0.01 43.16 3.16 0.02 43.16 3.14 0.02 43.16 1.8-1.91.95 0.01 51.14 1.13 0.01 51.14 1.73 0.01 51.14 1.92.02.17 0.01 58.5

20、0 1.25 0.01 58.50 1.91 0.01 58.50 219.28 0.09 75.39 11.15 0.07 75.39 10.44 0.07 75.39 小计100.00 0.47 29.14 100.00 0.59 23.64 100.00 0.67 23.71 占总计99.74 0.47 29.14 99.74 0.59 23.64 99.74 0.67 23.71 煤泥0.26 0.00 25.31 0.26 0.00 25.31 0.26 0.00 25.31 总计100.00 0.47 29.13 100.00 0.59 23.65 100.00 0.67 23.7

21、1 续表2-72513 mm合计校正产率/%灰分/%产率/%灰分/%0.67 30.18 2.40 31.92 灰分/%占本级占入选灰分占本级占入选灰分/%/%/%/%/%/%/%/%111213141516177.80 0.05 3.89 5.91 0.14 4.35 8.98 35.48 0.24 8.64 35.83 0.86 9.26 13.89 23.01 0.15 16.13 23.47 0.56 16.63 21.26 10.38 0.07 24.58 10.12 0.24 25.14 29.78 5.72 0.04 34.08 5.72 0.14 34.42 39.05 3.3

22、1 0.02 42.93 3.12 0.07 43.09 47.72 2.95 0.02 50.66 1.96 0.05 50.94 55.57 2.46 0.02 57.82 1.95 0.05 58.26 62.89 8.89 0.06 76.82 11.92 0.29 75.69 80.32 100.00 0.66 22.75 100.00 2.39 24.50 29.13 99.57 0.66 22.75 99.69 2.39 24.50 29.13 0.43 0.00 25.65 0.31 0.01 25.44 30.07 100.00 0.67 22.76 100.00 2.40

23、24.50 29.13 表格2- 8 20013mm劣层煤自然级浮沉资料综合表 Table 2-200-13 mm carrier layer coal natural level as well as the integration of data table 筛分浮沉200100 mm10050 mm5025 mm产率/%灰分/%产率/%灰分/%产率/%灰分/%1.14 59.09 1.24 50.47 1.30 57.22 密度占本级占入选灰分占本级占入选灰分占本级占入选灰分级别/%/%/%/%/%/%/%/%/%12345678910-1.30.07 0.00 7.10 0.12 0.

24、00 7.10 0.11 0.00 7.10 1.31.44.00 0.05 12.66 6.74 0.08 12.66 6.24 0.08 12.66 1.41.57.29 0.08 19.57 12.29 0.15 19.57 11.37 0.15 19.57 1.51.66.99 0.08 28.35 11.78 0.15 28.35 10.91 0.14 28.35 1.61.75.52 0.06 36.50 9.31 0.11 36.50 8.65 0.11 36.50 1.71.85.05 0.06 43.82 8.51 0.11 43.82 7.91 0.10 43.82 1.8

25、-1.910.33 0.12 52.02 7.45 0.09 52.02 11.44 0.15 52.01 1.92.07.59 0.09 59.86 5.47 0.07 59.86 8.39 0.11 59.86 253.15 0.60 77.26 38.32 0.47 77.26 34.98 0.45 77.33 小计100.00 1.14 59.13 100.00 1.23 50.49 100.00 1.29 50.76 占总计99.74 1.14 59.13 99.74 1.23 50.49 99.74 1.29 50.76 煤泥0.26 0.00 42.74 0.26 0.00 42

26、.74 0.26 0.00 42.38 总计100.00 1.14 59.09 100.00 1.24 50.47 100.00 1.30 50.74 续表2-82513 mm合计产率/%灰分/%产率/%灰分/%1.2350.744.9154.32占本级占入选灰分占本级占入选灰分/%/%/%/%/%/%/%1112131415160.190.005.870.120.016.646.030.0712.285.790.2812.5610.860.1318.4810.530.5119.2910.060.1226.9010.010.4927.988.180.1035.277.970.3936.186.

27、950.0943.347.160.3543.7015.800.1951.2011.270.5551.7313.510.1758.888.750.4359.4828.440.3577.8838.391.8877.39100.001.2349.55100.004.8952.3399.571.2349.5599.704.8952.330.430.0149.800.300.0145.19100.001.2349.55100.004.9152.31表格2- 9 20013mm劣层煤破碎级浮沉资料综合表Table 2-9 200 13 mm carrier layer coal crushing stag

28、e as well as the integration of data table 筛分浮沉200100 mm10050 mm5025 mm产率/%灰分/%产率/%灰分/%产率/%灰分/%0.23 73.83 0.25 65.22 0.26 65.48 密度占本级占入选灰分占本级占入选灰分占本级占入选灰分级别/%/%/%/%/%/%/%/%/%12345678910-1.30.07 0.00 7.10 0.12 0.00 7.10 0.11 0.00 7.10 1.31.44.00 0.01 12.66 6.74 0.02 12.66 6.24 0.02 12.66 1.41.57.29 0

29、.02 19.57 12.29 0.03 19.57 11.37 0.03 19.57 1.51.66.99 0.02 28.35 11.78 0.03 28.35 10.91 0.03 28.35 1.61.75.52 0.01 36.50 9.31 0.02 36.50 8.65 0.02 36.50 1.71.85.05 0.01 43.82 8.51 0.02 43.82 7.91 0.02 43.82 1.8-1.910.33 0.02 52.02 7.45 0.02 52.02 11.44 0.03 52.01 1.92.07.59 0.02 59.86 5.47 0.01 59.

30、86 8.39 0.02 59.86 253.15 0.12 77.26 38.32 0.09 77.26 34.98 0.09 77.33 小计100.00 0.23 59.13 100.00 0.25 50.49 100.00 0.26 50.76 占总计99.74 0.23 59.13 99.74 0.25 50.49 99.74 0.26 50.76 煤泥0.26 0.00 42.74 0.26 0.00 42.74 0.26 0.00 42.38 总计100.00 0.23 59.09 100.00 0.25 50.47 100.00 0.26 50.74 续表2-92513 mm合

31、计校正产率/%灰分/%产率/%灰分/%0.25 64.29 0.98 67.05 灰分/%占本级占入选灰分占本级占入选灰分/%/%/%/%/%/%/%/%111213141516170.19 0.00 5.87 0.12 0.00 6.64 13.42 6.03 0.01 12.28 5.79 0.06 12.56 19.34 10.86 0.03 18.48 10.53 0.10 19.29 26.07 10.06 0.02 26.90 10.01 0.10 27.98 34.76 8.18 0.02 35.27 7.97 0.08 36.18 42.96 6.95 0.02 43.34 7

32、.16 0.07 43.70 50.48 15.80 0.04 51.20 11.27 0.11 51.73 58.51 13.51 0.03 58.88 8.75 0.09 59.48 66.26 28.44 0.07 77.88 38.40 0.37 77.39 84.17 100.00 0.25 49.55 100.00 0.98 52.33 59.11 99.57 0.25 49.55 99.70 0.98 52.33 59.11 0.43 0.00 49.80 0.30 0.00 45.19 51.97 100.00 0.25 49.55 100.00 0.98 52.31 59.0

33、9 表格2- 10 130.5mm优层煤自然级浮沉资料综合表Table 2-10 13 0.5 mm optimal layer coal natural level as well as the integration of data table筛分浮沉136 mm60.5 mm合计产率/%灰分/%产率/%灰分/%产率/%灰分/%8.1721.2131.0219.3539.1919.74密度占本级占入选灰分占本级占入选灰分占本级占入选灰分/%级别/%/%/%/%/%/%/%/%/%12345678910-1.39.220.753.4812.613.902.6311.904.652.761.3

34、1.434.762.817.5934.2210.596.2634.3313.406.541.41.523.671.9114.7322.907.0914.1023.069.0014.241.51.610.160.8223.4810.063.1121.8210.083.9322.171.61.75.700.4632.174.351.3530.744.631.8131.111.71.83.050.2541.112.580.8038.572.681.0539.171.8-1.92.420.2049.011.720.5346.361.870.7347.071.92.01.830.1556.011.070

35、.3353.541.230.4854.3029.190.7475.6710.483.2472.8410.213.9973.36小计100.008.0921.08100.0030.9419.24100.0039.0319.62占总计99.008.0921.0899.7430.9419.2499.5939.0319.62煤泥1.000.0825.310.260.0825.310.410.1625.31总计100.008.1721.12100.0031.0219.26100.0039.1919.65表格2- 11 130.5mm优层煤破碎级浮沉资料综合表Table 2-11 13 0.5 mm op

36、timal layer coal crushing stage as well as the integration of data table 筛分浮沉136 mm60.5 mm合计校正产率/%灰分/%产率/%灰分/%产率/%灰分/%0.75 28.63 2.84 26.77 3.58 27.16 灰分/%密度占本级占入选灰分占本级占入选灰分占本级占入选灰分/%级别/%/%/%/%/%/%/%/%/%/%1234567891017-1.39.22 0.07 3.48 12.61 0.36 2.63 11.91 0.42 2.76 10.58 1.31.434.76 0.26 7.59 34.

37、22 0.97 6.26 34.33 1.23 6.54 14.35 1.41.523.67 0.18 14.73 22.90 0.65 14.10 23.06 0.82 14.24 22.05 1.51.610.16 0.08 23.48 10.06 0.28 21.82 10.08 0.36 22.17 29.98 1.61.75.70 0.04 32.17 4.35 0.12 30.74 4.63 0.17 31.10 38.92 1.71.83.05 0.02 41.11 2.58 0.07 38.57 2.68 0.10 39.17 46.99 1.8-1.92.42 0.02 49

38、.01 1.72 0.05 46.36 1.87 0.07 47.07 54.89 1.92.01.83 0.01 56.01 1.07 0.03 53.54 1.23 0.04 54.30 62.12 29.19 0.07 75.67 10.48 0.30 72.84 10.21 0.36 73.36 81.18 小计100.00 0.74 21.08 100.00 2.83 19.24 100.00 3.57 19.62 27.44 占总计99.00 0.74 21.08 99.74 2.83 19.24 97.52 3.57 19.62 27.44 煤泥1.00 0.08 25.31 0

39、.26 0.01 25.31 2.48 0.09 25.31 33.12 总计100.00 0.75 29.13 100.00 2.84 19.26 100.00 3.58 21.31 29.13 表格2- 12 130.5mm劣层煤自然级浮沉资料综合表 Table 2-12 13 0.5 mm carrier layer coal natural level as well as the integration of data table 筛分浮沉136 mm60.5 mm合计产率/%灰分/%产率/%灰分/%产率/%灰分/%1.43 39.28 8.30 40.65 9.73 40.45 密

40、度占本级占入选灰分占本级占入选灰分占本级占入选灰分/%级别/%/%/%/%/%/%/%/%/%12345678910-1.30.63 0.01 5.55 1.72 0.14 4.00 1.56 0.15 4.10 1.31.49.02 0.13 10.87 9.46 0.76 9.08 9.41 0.89 9.34 1.41.517.71 0.25 16.93 15.20 1.23 15.07 15.60 1.48 15.39 1.51.616.73 0.24 25.44 14.45 1.17 23.08 14.81 1.40 23.48 1.61.711.80 0.17 34.07 9.67

41、 0.78 31.94 10.01 0.95 32.32 1.71.89.25 0.13 42.51 6.83 0.55 39.66 7.20 0.68 40.21 1.8-1.99.65 0.14 50.27 10.28 0.83 46.87 10.20 0.97 47.35 1.92.07.19 0.10 57.74 6.53 0.53 54.88 6.64 0.63 55.34 218.04 0.26 76.90 25.87 2.09 75.53 24.73 2.34 75.68 小计100.00 1.41 39.48 100.00 8.07 40.29 100.00 9.48 40.1

42、7 占总计99.00 1.41 39.48 97.18 8.07 40.29 96.76 9.48 40.17 煤泥1.00 0.08 58.53 2.82 0.23 52.90 3.24 0.32 54.35 总计100.00 1.43 42.43 100.00 8.30 40.65 100.00 9.73 40.91 表格2- 13 130.5mm劣层煤破碎级浮沉资料综合表 Table 2-13 13 0.5 mm carrier layer coal crushing stage as well as the integration of data table 筛分浮沉136 mm60.

43、5 mm合计校正产率/%灰分/%产率/%灰分/%产率/%灰分/%0.29 54.03 1.66 55.39 1.94 55.19 灰分/%密度占本级占入选灰分占本级占入选灰分占本级占入选灰分/%级别/%/%/%/%/%/%/%/%/%/%1234567891017-1.30.63 0.00 5.55 1.72 0.03 4.00 1.55 0.03 4.10 22.74 1.31.49.02 0.03 10.87 9.46 0.15 9.08 9.39 0.18 9.34 27.98 1.41.517.71 0.05 16.93 15.20 0.24 15.07 15.57 0.29 15.3

44、9 34.03 1.51.616.73 0.05 25.44 14.45 0.23 23.08 14.79 0.28 23.48 42.12 1.61.711.80 0.03 34.07 9.67 0.16 31.94 9.99 0.19 32.32 50.96 1.71.89.25 0.03 42.51 6.83 0.11 39.66 7.19 0.14 40.21 58.85 1.8-1.99.65 0.03 50.27 10.28 0.17 46.87 10.18 0.19 47.35 65.99 1.92.07.19 0.02 57.74 6.53 0.11 54.88 6.63 0.

45、13 55.34 73.98 218.04 0.05 76.90 25.87 0.42 75.53 24.70 0.47 75.68 94.32 小计100.00 0.28 39.09 100.00 1.61 40.29 100.00 1.89 40.11 58.76 占总计99.00 0.28 39.09 97.18 1.61 40.29 97.45 1.89 40.11 58.76 煤泥1.00 0.00 58.53 2.82 0.05 52.90 2.55 0.05 53.22 71.86 总计100.00 0.29 39.28 100.00 1.66 40.65 100.00 1.94 40.45 59.09 2.1.2 筛分资料综合结果分析1）大于50mm粒级情况：煤种为炼焦煤但矸石含量不大，考虑选用人工手选排矸。2）各粒级含量分析：各粒级质量百分数相差很远，说明原煤粒度分布不均匀；6mm以下产率为49.23% 说明煤质易碎，在确定选煤方法时应当谨慎对待；但是由于本煤为炼焦煤，小粒度多对于本厂采用的选煤方法不会有太大限制。3）各粒级质量分析：各粒级灰分随粒度减小而减小，说明细粒中含煤较多，煤质较脆，-0.5mm粒级灰分比相邻组粒级灰分均高，说明矸石存在泥化现象。4）累计粒度特性曲线分析