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1、第一节煤质及煤的可选性煤质特征主要可采煤层煤质特征表表4—1—1矿区名称煤层名称煤种水分Mt(%)灰分Ad(%)挥发分Vdaf(%)硫分St.d磷分Pd(%)发热量Qnet.ar(MJ/kg)灰熔点STrc)胶质层厚度Y(mm)粘结指数GR.1备注沈北甲1褐煤15.526.048.00.50.00518.501350沈甲2褐煤16.532.048.50.50.00416.201400乙褐煤16.030.048.50.50.00417.001400阳3肥煤6.216.030.01.60.00328.5012
2、003095矿沈南7焦煤6.534.728.01.30.02722.5014002590区12瘦煤6.030.018.01.80.04021.501485144013无烟煤6.020.09.01.50.00624.501440永乐下煤组褐煤沈阳矿区分为沈北和沈南两个煤田。沈北煤田含煤地层为老第三系渐新统大桥段，煤种为褐煤，中等〜中高灰分、低硫分、特低磷分、中高发热量；沈南煤田含煤地层为石炭系上统太原组、二迭系下统山西组，永乐区有一层老第三系发育。该井田煤种有无烟煤、贫煤、贫瘦煤、瘦煤、焦煤、肥煤、气煤和长
3、焰煤，中等〜中高灰分、低〜高硫分、特低〜低等鱗分、高〜特高发热量。详见表4一1一1o二、原煤粒度组成各矿原煤粒度组成见表4一1一3。从表中可以看出，沈南矿区林盛矿、红菱矿、红阳三矿原煤3〜0.5mm级含量均在30%左右，为主导粒级；西马矿0.5〜0mm级含量24.28%，为主导粒级。沈北矿区各矿50〜13mm级含量在50%左右，灰分相对较高，煤泥灰分均在44%左右，说明矸石易碎，原煤中高灰细泥含量大。三、原煤的浮沉组成各矿入洗原煤50(80)〜0.5mm浮沉组成见表4一1一4。从表中可以看出，沈北原煤浮沉
4、煤泥灰分高出原生煤泥20%左右，说明在洗选过程中矸石易泥化，在选择选煤方法时应注意对煤泥水处理。沈南煤田各矿当理论分选密度在1.5〜1.7g/cm3时，原煤基本为极易选〜中等可选；沈北煤田各矿当理论分选密度彡1.7g/cm3时，原煤基本为中等可选〜较难选。沈南煤田林盛、红菱、红阳三矿生产十级炼焦精煤，西马矿低硫分原煤生产十四级喷吹煤，其余筛选后作为原煤直销；沈北煤田各矿生产动力煤(洗混块)，筛末煤作为商品原煤直销。缸度，mm林盛矿红菱矿红阳三矿Y,%Ad,%Y,%Ad,%Y,%Ad,%+504.1445.
5、26————50〜258.0438.7212.1254.447.4664.8025〜13108136.138.3647.1611.7852.8213〜618.0628.1614.2144.6016.5140.176〜312.6221.0610.0231.249.8236.803-0.529.6120.2231.7223.6429.1026.330.5〜016.7219.1523.5717.1525.3320.05原煤10025.8210031.5510034.04续表4一1一3粒度，mm西马矿蒲河矿清水矿
6、Y,%Ad,%Y,%Ad,%Y,%Ad,%+50—5()〜2519.7070.9233.6446.4731.6349.1125〜1313.0666.6716.0150.6214.1046.4613〜610.9554.0317.4141.5717.8942.236〜312.5346.4617.5141.7217.7641.973〜0.519.4829.2611.0143.1417.3539.170.5-024.2823.704.4244.621.2744.40原煤10045.8710045.0010044.
7、45密级g/cm林盛矿红菱矿红阳三矿50(80)〜0,5mm50-0.5mm50-0.5mmY,%Ad,%Y,%Ad,%Y,%Ad,%一1.355.746.9432.376.3339.056.501.3-1.45.9013.3019.4111.6411.1414.951.4-1.56.2220.754.6219.843.8023.861.5〜1.62.9230.232.0325.362.8932.001.6〜1.81.8239.952.9836.242.7143.77+1.827.4171.4538.59
8、76.0840.4279.06小计10027.1410036.1810039.17带煤泥98.9127.1497.8936.1897.6439.17煤泥1.0929.002.1127.162.3626.47合计10027.1610035.9910038.79续表4—1—4密级g/cm西马矿蒲河矿清水才50-0.5mm50〜13mm50〜13mmY,%Ad,%Y,%Ad,%Y,%Ad,%一1.32.102.9816.946.38
