5.0Mt-a煉焦煤選煤廠初步設(shè)計(jì)-畢業(yè)論文

趙家林：天順礦5.0Mt/a煉焦煤選煤廠初步設(shè)計(jì)遼寧工程技術(shù)大學(xué)畢業(yè)設(shè)計(jì)前言煤炭是我國重要基礎(chǔ)能源。我國能源資源基本特點(diǎn)是富煤、貧油、少氣，我國能源的稟賦并不樂觀，主要一次能源、石油、天然氣、煤炭儲采比均低于世界的平均水平。所以，一次性能源消費(fèi)必然是以煤炭為主。在未來的相當(dāng)長時期內(nèi)，以煤為主的能源供應(yīng)格局應(yīng)該不會改變，煤炭基礎(chǔ)能源地位也不會隨之改變。我國原煤的入洗率低，與國際水平差距巨大。直接燃用和利用未經(jīng)洗選加工原煤現(xiàn)象十分的普遍，是相當(dāng)不合理的，煤炭利用率低，經(jīng)濟(jì)效益很差，造成寶貴的煤炭資源出現(xiàn)浪費(fèi)、環(huán)境污染等嚴(yán)重問題。因此對于國內(nèi)煤炭企業(yè)，為了使煤炭資源得到充分的利用，必須進(jìn)行合理的機(jī)械加工和化學(xué)加工。加大煤炭洗選力度，使用戶用上符合質(zhì)量要求的產(chǎn)品，這樣不僅可提高能源利用效率，還可減少環(huán)境污染，同事可節(jié)約礦產(chǎn)資源。實(shí)踐證明，選煤提高了煤炭的使用價值，充分利用煤炭資源是最經(jīng)濟(jì)而有效的加工方法之一。原煤通過選煤和篩分加工之后，可以改善煤炭產(chǎn)品的質(zhì)量，生產(chǎn)出滿足不同用戶需求、不同規(guī)格的產(chǎn)品，進(jìn)而減少矸石無效運(yùn)輸，提高煤炭的利用率，節(jié)約能源，同時給企業(yè)帶來豐厚的經(jīng)濟(jì)效益。目前我國大型煤礦基本上都會建有配套的選煤廠，因此，要保證煤炭洗選加工的健康發(fā)展,規(guī)范大中型選煤廠的市場就顯得十分重要。本次設(shè)計(jì)的任務(wù)是：天順礦5.0Mt/a煉焦煤選煤廠初步設(shè)計(jì),該廠屬于礦區(qū)型選煤廠。礦區(qū)設(shè)計(jì)規(guī)模為年產(chǎn)5.0Mt，故選煤廠年處理原煤亦為5.0Mt。選煤廠服務(wù)年限與礦區(qū)相同，工作制度與礦區(qū)相同。原料煤來自兩個礦區(qū),根據(jù)煤質(zhì)特征確定煤用途為煉焦煤。本次設(shè)計(jì)主要內(nèi)容是對原煤的煤質(zhì)資料進(jìn)行分析和綜合，評定原煤的可選性。同時完成對原煤煤質(zhì)資料分析、煤可選性評定、工藝流程選擇與計(jì)算、設(shè)備選型、廠房布置、經(jīng)濟(jì)概算、圖紙繪制等初步設(shè)計(jì)任務(wù)。1廠區(qū)概況1.1地理、行政及交通天順礦煉焦煤選煤廠是一座礦區(qū)型選煤廠，東與吉林省接壤，西距省會沈陽45公里，北與鐵嶺毗鄰，南與本溪相望。距沈陽桃仙機(jī)場四十公里，據(jù)營口海港200公里，據(jù)大連海港400公里，均有高速公路和鐵路相連，交通十分便利。圖1-1天順礦礦區(qū)交通位置圖Fig.1-1Chartoftianshunarea’stransportation1.2水文地質(zhì)條件煤田為一軸向近東西的不對稱向斜，北翼陡(傾角30度～600)，南翼緩(傾角15度～300)。向斜構(gòu)造由下第三系組成，基底為前震旦系變質(zhì)巖及白堊系火山碎屑巖，地表為厚0～30m的第四系覆蓋。下第三系賦存深度不超過600m，該系的主要構(gòu)造型式為橫切或斜交的平推正斷層，另有與該系沉積同時間歇噴發(fā)的玄武巖，對第三紀(jì)下部煤層有一定影響。1.3工程地質(zhì)和地震情況撫順市在地質(zhì)構(gòu)造上屬華北地臺遼東臺背斜，位于下遼河斷陷盆地與遼東隆起帶交接處的北東向撫順新生代斷陷盆地內(nèi)，是兩種不同運(yùn)動性質(zhì)斷塊的分界地區(qū)。該地區(qū)地質(zhì)構(gòu)造比較復(fù)雜，主體構(gòu)造線呈北東～北東東方向，主要斷裂構(gòu)造有北東向的渾河深大斷裂，該斷裂在古生代、中生代、新生代都有過強(qiáng)烈的活動。其次是章黨～哈達(dá)斷裂等，此外，還發(fā)育有一系列北西～北西西向不同規(guī)模的斷裂，如東洲斷裂、蘇子河斷裂等。這些斷裂控制了本區(qū)構(gòu)造格局及區(qū)內(nèi)的地震活動。1975年海城7.3級大地震距撫順約160km，影響烈度達(dá)Ⅵ度。距撫順最近的一次較大地震是1765年沈陽的5級地震，距撫順只有30km。1954年12月在沈陽至撫順之間發(fā)生過一次3.5級地震。撫順市自1968年底開始監(jiān)測地震以來，記錄到的本區(qū)最大地震為3.2級，小震一般多分布在沈陽－撫順之間和渾河斷裂兩側(cè)附近。同時，也記錄到撫順地區(qū)的礦震。1.4氣候特征撫順地區(qū)屬北溫帶季節(jié)風(fēng)性大陸氣候，一年四季分明，氣候宜人，雨量充沛，年平均降雨量在750-850毫米，無霜期為150天左右。年平均氣溫為5-7攝氏度，年日照時數(shù)為2250-2520小時，日照百分率為51-58%。雨水儲量充足。1.5水源供應(yīng)及排水條件1）選煤用水水源選煤廠的生產(chǎn)、生活及消防用水水源取自城市提供水。2）排水因工業(yè)場地地形高差區(qū)域變化較大，排水系統(tǒng)分為高區(qū)域和低區(qū)域兩塊。低區(qū)排水均集中到污水泵站，經(jīng)加壓后排至辦公樓附近，與高區(qū)排水系統(tǒng)合并自流排入礦區(qū)排水系統(tǒng)中，并進(jìn)入污水處理廠統(tǒng)一處理。1.6電源供應(yīng)情況選煤廠電源接自城市電源。1.7建筑材料供應(yīng)本工程所用的建筑材料相當(dāng)普遍，均可由當(dāng)?shù)夭少彙?原料煤基地2.1原料煤生產(chǎn)及供應(yīng)該礦采根據(jù)地形地貌運(yùn)用“分區(qū)開采、聯(lián)合運(yùn)輸，內(nèi)部排土”的生產(chǎn)工藝，采裝為4-8Mз電鏟，運(yùn)輸用150噸直流準(zhǔn)軌電機(jī)車和42、108噸采礦型汽車，并且采用標(biāo)準(zhǔn)軌道電氣化鐵路、采礦大汽車、皮帶提升運(yùn)輸工藝。采出主要產(chǎn)品為煤炭、油母頁巖和洗選設(shè)備。煤炭的發(fā)熱量7500－8000千卡∕千克為焦煤，并有含油率6－14％的油母頁巖，礦井井田蘊(yùn)藏稀有的煤精和琥珀，生產(chǎn)各種煤精工藝品和裝飾品。天順礦開采于1901年。礦坑?xùn)|西長6.6公里，南北寬2.2公里，總面積為14.52平方公里，開采深度為海平面-400米水平。解放以后，累計(jì)生產(chǎn)煤炭1.9億噸，油母頁巖4億噸，上交利稅6.58億元為國家的經(jīng)濟(jì)建設(shè)做出較大貢獻(xiàn)。井田含煤地層為石炭、二迭系，含煤19層，主要采煤層為4層，分別是8、10、15、17層煤，煤層總厚度平均為15.73m。8、10層煤較厚，平均厚度分別為5.15m、7.88m，其中最厚處20.01m；15、17層煤較薄，平均厚度分別為2.15m、4.23m。井田煤質(zhì)較為穩(wěn)定，原煤平均灰分在21.16～22.91%之間，近年來隨井下地質(zhì)條件及生產(chǎn)技術(shù)的變化，原煤灰分達(dá)到25%左右；各煤層含硫量變化較大，原煤高位發(fā)熱量在25.10～27.06MJ/kg之間,為中高發(fā)熱量煤。經(jīng)現(xiàn)場采樣測定，8層煤的精煤硫分為0.48％，粘結(jié)指數(shù)（GR.I）為74.30，Y值為10.50mm。2.2煤層及煤質(zhì)截止到2008年末，礦區(qū)8層煤、10層煤可采儲量共有8842.9萬t，15層煤、17層煤可采儲量共有7315.3萬t，但由于開采的煤層變薄、地質(zhì)條件復(fù)雜，導(dǎo)致原煤的灰分增高，相應(yīng)帶來篩混煤灰分變高，發(fā)熱量降低。天順煤礦所處地理環(huán)境決定其煤炭產(chǎn)品銷售的優(yōu)勢來自于質(zhì)量穩(wěn)定，發(fā)熱量高的特點(diǎn)。因此煤質(zhì)變差帶來了市場競爭優(yōu)勢的減弱。礦井開采的技術(shù)條件不變的情況下，要穩(wěn)定產(chǎn)品質(zhì)量，必須加大入洗能力，使之與礦區(qū)生產(chǎn)能力相匹配，并且可以根據(jù)市場需求生產(chǎn)優(yōu)質(zhì)的煉焦用煤。精煤：50～0mm，Ad在7.51-9.0%之間作為煉焦配煤（可根據(jù)市場情況調(diào)整灰分）?；烀海?0～0mm，發(fā)熱量>34MJ/Kg作為一般煉焦煤。煤泥：需根據(jù)煤質(zhì)的變化區(qū)別對待，經(jīng)晾干直接摻入混煤，做為電煤銷售。3煤質(zhì)資料整理、審查、分析及綜合煤質(zhì)資料整理、審查、分析及綜合是為了進(jìn)一步了解煤的內(nèi)在特性和制定合理的選煤工藝流程，包括煤的物理性質(zhì)、化學(xué)性質(zhì)、篩分和浮沉資料、可選性。掌握綜合原煤的特性，繪制混合可選性曲線，和分級可選性曲線，確定原煤可選性以及進(jìn)行工藝流程的計(jì)算。3.1原始煤質(zhì)資料審查、分析及調(diào)整3.1.1原始煤質(zhì)資料內(nèi)容原煤的煤質(zhì)資料是制定所選精煤灰分、選煤工藝流程、工藝流程計(jì)算和所需設(shè)備選型的基原數(shù)據(jù)。煤質(zhì)資料審查與分析的目的是為了進(jìn)一步了解該礦區(qū)所采原煤的物理、化學(xué)特性和方便制定較為合理的選煤工藝流程。煤質(zhì)資料綜合與調(diào)整的目的是為了掌握綜合原煤的特性，繪制可選性曲線，進(jìn)行工藝流程的計(jì)算，是選煤廠設(shè)計(jì)的最基礎(chǔ)工作。A煤層篩分試驗(yàn)結(jié)果見表3-1，B煤層篩分試驗(yàn)結(jié)果見表3-2，A煤層自然級篩分浮沉試驗(yàn)報告見表3-3，B煤層自然級篩分浮沉試驗(yàn)報告見表3-4。表3-1A層原煤篩分試驗(yàn)結(jié)果表Tab.3-1Acoalscreeningtestresultstable粒級/mm產(chǎn)物名稱產(chǎn)率質(zhì)量Qgr,d/MJ·kg-1重量/kg占全樣/%篩上累計(jì)/%Mad/%Ad/%St,,d/%>100手選煤夾矸煤硫鐵礦矸石小計(jì)10.202.3012.5020.5066.1528.90100~50手選煤夾矸煤硫鐵礦矸石小計(jì)14.402.6517.0516.2050.8721.59>50合計(jì)29.5524.6850~2525~1313~6.06.0~3.03.0~0.50.5~0.0未分離煤未分離煤未分離煤未分離煤未分離煤未分離煤10.2911.1012.7411.4220.704.2030.2322.3818.9916.7115.8720.0050~0合計(jì)70.4519.94毛煤總計(jì)100.00100.00原煤合計(jì)（除去＞50mm級矸石及硫鐵礦）95.2518.41表3-2B層原煤篩分試驗(yàn)結(jié)果表Tab.3-2Bcoalscreeningtestresultstable粒級/mm產(chǎn)物名稱產(chǎn)率質(zhì)量Qgr,d/MJ·kg-1重量/kg占全樣/%篩上累計(jì)/%Mad/%Ad/%St,,d/%>100手選煤夾矸煤硫鐵礦矸石小計(jì)8.862.1611.0223.2463.8531.20100~50手選煤夾矸煤硫鐵礦矸石小計(jì)12.112.6414.7525.5668.4133.23>50合計(jì)25.7732.3650~2525~1313~6.06.0~3.03.0~0.50.5~0.0未分離煤未分離煤未分離煤未分離煤未分離煤未分離煤16.3523.0715.226.916.686.0025.8221.1117.7218.9420.0425.1950~0合計(jì)74.2321.48毛煤總計(jì)100.0024.28原煤合計(jì)（除去＞50mm級矸石及硫鐵礦）95.3621.71表3-3A層煤0.5~50mm自然級浮沉試驗(yàn)報告表Tab.3-3Afugitivedusttestresultsforcoalseamnaturalclass篩分特性50~25mm25~13mm13~6mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%10.2930.2311.1022.3812.7418.99密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)4.0053.0712.202.732.932.9322.24100.000.49100.000.415.441.250.280.300.302.2810.250.0510.298.0910.0518.6329.2842.0352.3084.7030.3015.0030.237.2658.2613.343.722.722.7211.98100.000.72100.000.806.421.470.410.300.301.321.020.0811.105.669.8218.1729.3741.0463.2082.8722.4415.0022.3814.1856.2612.533.312.992.368.35100.000.39100.001.807.141.590.420.380.301.0612.690.0512.745.439.6118.4030.0441.8261.2781.3419.0016.0018.99續(xù)表篩分特性6~3mm3~0.5mm50~0.5mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%11.4216.7120.715.8766.2519.94密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%占入選/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)13.2058.1914.067.39100.000.44100.001.506.611.600.3411.360.0511.424.278.5117.5230.1041.0562.0178.3016.7019.0016.7120.5752.2812.323.732.500.987.61100.001.59100.004.1910.652.510.760.510.201.5520.370.3320.707.128.3514.7527.1939.5454.3073.6615.8016.3815.8713.2455.2012.823.392.651.9810.73100.000.85100.008.7036.268.422.231.741.307.0565.690.5666.256.9629.016.741.781.391.045.6452.550.4553.006.199.1417.1428.8640.9458.6980.6619.9516.2619.94表3-4B層煤0.5~50mm自然級浮沉試驗(yàn)報告表Tab.3-4Bgradecoalseamnaturalfugitivedusttestresult篩分特性50~25mm25~13mm13~6mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%16.3525.8223.0721.1115.2217.72密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)18.6544.007.823.512.031.8522.15100.000.61100.003.037.151.270.570.330.303.6016.250.1016.353.849.4718.6425.7129.5652.2176.6425.7931.3625.8220.5447.917.792.351.871.7417.80100.000.39100.004.7211.011.790.540.430.404.0922.980.0923.072.128.1816.3026.3530.1751.1375.1521.0730.1021.1117.8246.736.402.971.981.6522.44100.000.46100.002.707.080.970.450.300.253.4015.150.0715.221.013.918.1210.9819.0750.7060.6717.6925.2117.72續(xù)表篩分特性6~3mm3~0.5mm50~0.5mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%6.9118.946.6820.0468.2321.15密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%占入選/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)18.1449.205.812.321.891.8920.75100.000.29100.001.253.390.400.160.130.131.436.890.026.913.065.7111.3316.3320.3448.9963.6618.9226.1418.9417.2748.055.412.402.101.9522.82100.000.30100.001.153.200.360.160.140.131.526.660.026.682.016.0012.0014.6820.0849.0963.1520.0225.7020.0418.9246.867.052.771.961.7820.67100.000.44100.0012.8531.834.791.881.331.2114.0467.930.3068.232.576.370.960.380.270.242.8113.590.0613.652.377.0414.5320.6325.4950.8669.5621.1228.8221.163.2篩分資料綜合與分析3.2.1篩分資料綜合煤質(zhì)篩分資料綜合是指將幾個礦區(qū)或幾個煤層的原煤篩分資料按照所要求的比例，將各自的粒度組成經(jīng)過計(jì)算合并成為一個（或兩個）原煤的篩分組成。煤質(zhì)資料綜合的目的是為了得到并掌握綜合原煤的特性，之后繪制粒度特性曲線和可選性曲線，進(jìn)行工藝流程的計(jì)算，因此，煤質(zhì)資料綜合工作，是選煤廠設(shè)計(jì)的基礎(chǔ)工作。原煤來自幾個礦井或一個礦井的幾個煤層，所以整合這些數(shù)據(jù)的工作量時很大的，但是無論篩分組成或者浮沉組成的綜合，其計(jì)算公式，方法基本上相似的，把幾個分散的數(shù)據(jù)合并成一個整體的過程，因此，在綜合計(jì)算時應(yīng)該將各級占本級質(zhì)量分?jǐn)?shù)換算成占全樣質(zhì)量百分?jǐn)?shù)，列出計(jì)算過程，將混合入選篩分浮沉資料綜合的內(nèi)容，寫入表內(nèi)，之后便可以清楚的看出篩分試驗(yàn)的結(jié)果。對于自然級來說，確定各層煤在入選原煤中所占的百分?jǐn)?shù)見表3-5中，K1=20%，K2=80%，K=K1+K2=100%表3-5A、B層原煤篩分試驗(yàn)結(jié)果綜合表Tab.3-5A,Btwolayersofrawcoalscreeningtestresults粒級/mm產(chǎn)物名稱A層K1=80%B層K2=20%綜合K=100%本層/%全樣/%Ad/%本層/%全樣/%Ad/%全樣/%Ad/%>100煤夾矸煤硫鐵礦矸石小計(jì)10.202.3012.508.161.8410.0010.6563.7128.908.862.1611.021.770.432.2018.2463.4431.209.932.2712.2012.0063.6629.32100~50煤夾矸煤硫鐵礦矸石小計(jì)14.402.6517.0511.522.1213.649.4551.2521.5912.112.6414.752.420.532.9518.5665.2033.2313.942.6516.5911.0354.0323.66>50合計(jì)29.5523.6424.6825.775.1532.3628.7928.7950~2525~1313~6.06.0~3.03.0~0.50.5~0.0未分離煤10.2911.1012.7411.4220.704.208.238.8810.199.1416.563.3630.2322.3818.9916.7115.8720.0016.3523.0715.226.916.686.003.274.613.041.381.341.2025.8221.1117.7218.9420.0425.1911.5013.4913.2410.5217.904.5628.9821.9518.7017.0016.1821.3750~0合計(jì)70.4556.3619.9474.2314.8521.4871.2120.26毛煤總計(jì)100.080.0021.34100.020.0024.28100.021.93由原煤篩分實(shí)驗(yàn)表可得知：1）+50mm粒級情況：將+50mm粒級的煤，采用分選的方法分開高粒級的煤，并進(jìn)行分析實(shí)驗(yàn)，得到煤、矸石的含量和灰分。從綜合數(shù)據(jù)可得原煤中并不含有夾矸煤和硫鐵礦，矸石含量較低，為低矸等級，并不需要機(jī)械排干，產(chǎn)品為煉焦用煤，對于+50mm粒級，可通過設(shè)置檢查性手選揀出鐵屑及雜物。2）各粒級含量分析：A層煤和B層煤各粒級的質(zhì)量百分?jǐn)?shù)相近，說明和A層原煤的粒度分布均勻；A層煤大粒級含量較多，但灰分與B層幾乎相同。3）各粒級的質(zhì)量分析：A層和B層煤灰分隨粒度的減小而減小表明A層和B層煤煤質(zhì)脆易碎。最優(yōu)洗選方式采用直接分級分選和破碎至-50mm以下后混合分選兩種方式進(jìn)行比較。方案Ⅰ：混合入選；+50mm粒級入選原煤破碎后和-50mm自然級原煤一起進(jìn)行洗選。方案Ⅱ：分級入選；原煤+50mm粒級破碎后，+13mm和-13mm級分級進(jìn)行洗選。綜合入選原煤兩層煤的原始煤質(zhì)資料可得原煤篩分分析表。將各層煤占本層煤的粒度級別換算成占入廠（選）原煤的百分?jǐn)?shù)如表3-5中第4欄和第7欄。將占全樣各個數(shù)值按等粒級相加，即得原煤各粒級的含量。如表3-5中綜合后各粒度級的灰分用加權(quán)平均法計(jì)算，例如，表3-5中，第10欄各行為。表3-6A、B層破碎級篩分試驗(yàn)結(jié)果表Tab.3-6A,Btwolayersofrawcoalcrushingstagescreeningtestresults粒級/mmA層K=23.64%B層K=5.15%綜合K=28.79%校正本級/%全樣/%Ad/%本級/%全樣/%Ad/%本級/%全樣/%Ad/%50~2525~1313~6.06.0~3.03.0~0.50.5~0.0合計(jì)4.324.665.344.798.681.7629.553.463.734.273.836.941.4123.6434.9727.1223.7321.4520.6124.7424.685.688.015.282.42.322.0825.771.141.601.060.480.460.425.1536.731.9928.629.8230.9236.0732.3615.9518.5118.5014.9825.736.33100.04.595.335.334.317.411.8228.7935.4028.5824.6922.3821.2627.3226.0535.4028.5824.6922.3821.2627.3226.05根據(jù)A、B兩層原煤自然級篩分綜合表及兩層煤破碎級篩分試驗(yàn)結(jié)果綜合表，進(jìn)行整理綜合，填入自然級與破碎級篩分試驗(yàn)結(jié)果綜合表。并根據(jù)此表格計(jì)算出入選浮沉試驗(yàn)50~0.5mm粒級的灰分為21.85%。表3-7自然級與破碎級篩分試驗(yàn)結(jié)果綜合表Tab.3-7A,Btwolayersofrawcoalcrushinglevelwiththenaturallevelscreeningtestresults粒級/mm自然級破碎級綜合本級/%全樣/%Ad/%本級/%全樣/%Ad/%本級/%全樣/%Ad/%50~2525~1313~6.06.0~3.03.0~0.50.5~0.0合計(jì)16.1518.9418.5914.7725.146.40100.0011.513.4913.2410.5217.94.5671.2128.9821.9518.71716.1821.3720.2615.9518.5118.5014.9825.736.33100.004.595.335.334.317.411.8228.7935.4028.5824.6922.3821.2627.3226.0516.0918.8218.5714.8325.316.38100.0016.0918.8218.5714.8325.316.38100.0030.8123.8320.4218.5617.6723.0721.9350~0.5mm粒級(入浮沉試驗(yàn))灰分21.85%3.2.2篩分資料綜合結(jié)果分析根據(jù)A、B層原煤篩分資料綜合繪制入選原煤的粒度曲線，將粒度組成對選煤產(chǎn)品結(jié)構(gòu)的影響程度做出詳細(xì)分析。粒度特性曲線是用圖表的形式反應(yīng)該原煤的粒度特性特點(diǎn)，曲線的橫坐標(biāo)代表粒度，縱坐標(biāo)代表產(chǎn)率。它是以散料粒度組成表為依據(jù)繪制的。若縱坐標(biāo)為累積產(chǎn)率，則稱為累積粒度特性曲線，若縱坐標(biāo)為粒級產(chǎn)率，則稱為部分粒度特性曲線。對于粒度范圍很寬的物料，在繪制其粒度特性曲線時，既要考慮到橫軸的比例，又要兼顧到越是接近遠(yuǎn)點(diǎn)，橫坐標(biāo)的分點(diǎn)就越密集，一般，是將曲線繪制在半對數(shù)坐標(biāo)系中。表3-8兩層原煤破碎級與自然級篩分試驗(yàn)結(jié)果綜合表Tab.3-8Screenselectedtoformintegrated粒級/mm全樣/%篩上累計(jì)/%篩下累計(jì)/%灰分/%1234550~2525~1313~6.06.0~3.03.0~0.50.5~0.050~0合計(jì)16.0918.8218.5714.8325.316.38100.0016.0934.9153.4868.3193.62100.00100.0083.9165.0946.5231.696.3830.8127.0524.7423.4021.8521.9321.93粒度特性曲線如下圖所示：圖3-10mm~50mm綜合級原煤粒度曲線Fig.3-10mm~50mmintegratedrawcoalparticlesizecurve累計(jì)粒度特性曲線的用途：①可求出任一粒級的產(chǎn)率，它等于粒度d1及d2所對應(yīng)的縱坐標(biāo)的差值。②可確定任何指定粒度的相應(yīng)累積產(chǎn)率；或由指定的累積產(chǎn)率查得相應(yīng)粒度。③由曲線的形狀可大致判斷物料粒度組成。對于正累積的粒度特性曲線，曲線向左下角凹進(jìn)，表明物料中細(xì)粒級含量多；若曲線向右上角凸進(jìn)，說明粗粒級含量多；曲線近似直線，表示粗、細(xì)粒度分布均勻。3.3浮沉資料綜合與分析3.3.1浮沉資料綜合及原煤可選性曲線繪制根據(jù)所篩分資料綜合時不同入選方式所選定的粒度界線，完成相應(yīng)的浮沉資料綜合及灰分校正，如有各煤層小浮沉和浮選實(shí)驗(yàn)資料，也應(yīng)對其進(jìn)行綜合，最后依據(jù)各種入選方式的綜合結(jié)果，繪制出相應(yīng)可選性曲線。3.3.2浮沉資料綜合結(jié)果分析對不同入選方式下浮沉資料結(jié)果進(jìn)行分析，通過分析各密度級含量與灰分、中間密度物含量等，粗略判斷煤質(zhì)優(yōu)劣，是否具有生產(chǎn)低灰精煤的可能性。對高密度物進(jìn)行分析，大致判斷出排矸數(shù)量與質(zhì)量指標(biāo)，為矸石利用程度提供依據(jù)。如含硫量較高，對各密度級含硫情況進(jìn)行分析，為制定脫硫方案提供依據(jù)。表3-9A層煤0.5~50mm自然級浮沉試驗(yàn)報告表Tab.3-9Afugitivedusttestresultsforcoalseamnaturalclass篩分特性50~25mm25~13mm13~6mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%10.2930.2311.1022.3812.7418.99密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)4.0053.0712.202.732.932.9322.24100.000.49100.000.415.441.250.280.300.302.2810.250.0510.298.0910.0518.6329.2842.0352.3084.7030.3015.0030.237.2658.2613.343.722.722.7211.98100.000.72100.000.806.421.470.410.300.301.321.020.0811.105.669.8218.1729.3741.0463.2082.8722.4415.0022.3814.1856.2612.533.312.992.368.35100.000.39100.001.807.141.590.420.380.301.0612.690.0512.745.439.6118.4030.0441.8261.2781.3419.0016.0018.99續(xù)表篩分特性6~3mm3~0.5mm50~0.5mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%11.4216.7120.715.8766.2519.94密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%占入選/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)13.2058.1914.067.39100.000.44100.001.506.611.600.3411.360.0511.424.278.5117.5230.1041.0562.0178.3016.7019.0016.7120.5752.2812.323.732.500.987.61100.001.59100.004.1910.652.510.760.510.201.5520.370.3320.707.128.3514.7527.1939.5454.3073.6615.8016.3815.8713.2455.2012.823.392.651.9810.73100.000.85100.008.7036.268.422.231.741.307.0565.690.5666.256.9629.016.741.781.391.045.6452.550.4553.006.199.1417.1428.8640.9458.6980.6619.9516.2619.94表3-10A層煤0.5~50mm破碎級浮沉試驗(yàn)報告表Tab.3-10Afugitivedusttestresultsforacoalseambrokenclass篩分特性50~25mm25~13mm13~6mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%4.3234.974.6627.125.3423.73密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)3.6548.4211.132.492.672.6729.06100.000.49100.000.162.080.411.254.300.024.328.0910.0518.6329.2842.0352.3084.7035.0715.0034.976.6953.6812.293.432.512.5118.90100.000.72100.000.312.490.570.160.120.120.884.630.034.665.669.8218.1729.3741.0463.2082.8727.1915.0027.1213.1051.9711.573.062.772.1815.35100.000.39100.000.702.760.620.160.150.120.825.320.025.345.439.6118.4030.0441.8261.2781.3423.7616.0023.73續(xù)表篩分特性6~3mm3~0.5mm50~0.5mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%4.7921.458.6820.6127.7924.49密度/kg·L-1占本級/%占本層/%灰分/%占本級/%占本層/%灰分/%占本級/%占本層/%占入選/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.8+1.8小計(jì)煤泥總計(jì)12.1853.6913.002.922.031.6214.55100.000.44100.000.582.560.620.140.100.080.694.770.024.794.278.5117.5230.1041.0562.0178.3021.4619.0021.4518.8447.8711.283.422.290.9015.40100.001.59100.001.614.090.960.290.200.081.328.540.148.687.128.3514.7527.1939.5454.3073.6620.6816.3820.6112.1750.7311.783.122.431.8217.96100.000.85100.003.3513.983.250.860.670.504.9527.560.2327.792.6811.192.600.690.540.403.9622.050.1922.236.199.1417.1428.8640.9458.7179.9924.7516.2624.68表3-11A層煤自然級與破碎級浮沉試驗(yàn)綜合表Tab.3-11Alayerofcoalcomprehensivelevelsofnaturalandbrokenfugitivedusttest密度/kg·L-1自然級破碎級綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)13.2455.2012.823.392.651.9810.73100.000.85100.006.9629.016.741.781.391.045.6452.550.4553.006.199.1417.1428.8640.9458.6980.6619.9516.2619.9412.1750.7311.783.122.431.8217.96100.000.85100.002.6811.192.600.690.540.403.9622.050.1922.236.199.1417.1428.8640.9458.7179.9924.7516.2624.6820.6886.2020.025.304.143.0920.59100.000.85100.009.6440.199.332.471.931.449.6074.600.6475.236.199.1417.1428.8640.9458.6980.3921.3716.2621.34表3-12B層煤自然級浮沉試驗(yàn)報告表Tab.3-12Bgradecoalseamnaturalfugitivedusttestresult篩分特性50~25mm25~13mm13~6mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%16.3525.8223.0721.1115.2217.72密度/kg·L-1本級/%本層/%灰分/%本級/%本層/%灰分/%本級/%本層/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)18.6544.007.823.512.031.8522.15100.000.61100.003.037.151.270.570.330.303.6016.250.1016.353.849.4718.6425.7129.5652.2176.6425.7931.3625.8220.5447.917.792.351.871.7417.80100.000.39100.004.7211.011.790.540.430.404.0922.980.0923.072.128.1816.3026.3530.1751.1375.1521.0730.1021.1117.8246.736.402.971.981.6522.44100.000.46100.002.707.080.970.450.300.253.4015.150.0715.221.013.918.1210.9819.0750.7060.6717.6925.2117.72續(xù)表篩分特性6~3mm3~0.5mm50~0.5mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%6.9118.946.6820.0468.2321.15密度/kg·L-1本級/%本層/%灰分/%本級/%本層/%灰分/%本級/%本層/%入選/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)18.1449.205.812.321.891.8920.75100.000.29100.001.253.390.400.160.130.131.436.890.026.913.065.7111.3316.3320.3448.9963.6618.9226.1418.9417.2748.055.412.402.101.9522.82100.000.30100.001.153.200.360.160.140.131.526.660.026.682.016.0012.0014.6820.0849.0963.1520.0225.7020.0418.9246.867.052.771.961.7820.67100.000.44100.0012.8531.834.791.881.331.2114.0467.930.3068.232.576.370.960.380.270.242.8113.590.0613.652.377.0414.5320.6325.4950.8669.5621.1228.8221.16表3-13B層煤破碎級浮沉試驗(yàn)報告表Tab.3-13Bgradecoalseambrokenofftestresult篩分特性50~25mm25~13mm13~6mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%5.6836.708.0131.995.2828.60密度/kg·L-1本級/%本層/%灰分/%本級/%本層/%灰分/%本級/%本層/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)14.6334.536.132.751.591.4538.90100.000.61100.000.831.950.350.160.090.082.205.650.035.683.849.4718.6425.7129.5652.2176.6436.7331.3636.7016.3738.196.211.871.491.3934.47100.000.39100.001.313.050.500.150.120.112.757.980.038.012.128.1816.3026.3530.1751.1375.1532.0030.1031.9913.3034.864.782.221.481.2342.14100.000.46100.000.701.830.250.120.080.062.225.260.025.281.013.918.1210.9819.0750.7060.6728.6125.2128.60續(xù)表篩分特性6~3mm3~0.5mm50~0.5mm產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%2.4029.822.3230.9223.6932.03密度/kg·L-1本級/%本層/%灰分/%本級/%本層/%灰分/%本級/%本層/%入選/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)13.7137.194.391.761.431.4340.09100.000.29100.000.330.890.100.040.030.030.962.390.012.403.065.7111.3316.3320.3448.9963.6629.8426.1429.8215.6443.524.902.181.901.7730.09100.000.30100.000.361.010.110.050.040.040.702.310.012.322.016.0012.0014.6820.0849.0963.1530.9425.7030.9214.9337.005.562.181.551.4137.38100.000.42100.003.528.731.310.510.360.338.8223.590.1023.690.701.750.260.100.070.071.764.720.024.742.387.0714.5820.7125.5250.8469.6932.0528.6632.04表3-14B層煤自然級與破碎級浮沉試驗(yàn)綜合表Tab.3-14Blayercoalcomprehensivelevelsofnaturalandbrokenfugitivedusttest密度/kg·L-1自然級破碎級綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)18.9246.867.052.771.961.7820.67100.000.44100.002.576.370.960.380.270.242.8113.590.0613.652.377.0414.5320.6325.4950.8669.5621.1228.8221.1614.9337.005.562.181.551.4137.38100.000.42100.000.701.750.260.100.070.071.764.720.024.742.387.0714.5820.7125.5250.8469.6932.0528.6632.047.1617.732.671.050.740.679.99100.000.44100.003.278.111.220.480.340.314.5718.300.0818.382.387.0414.5420.6525.5050.8669.6123.9428.7823.96浮沉資料灰分的校正通常用調(diào)出量法。校正的基準(zhǔn)為篩分綜合表中的相應(yīng)粒級綜合校正灰分值為準(zhǔn)。注意煤泥灰分不校正，則式中:--灰分校正系數(shù)，此值可正、可負(fù)，%--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(jì)灰分（去泥），%(1)第一種方法：△<0.2%由于灰分差值較小，△<0.2%，與篩分資料的校正基本相同。將灰分差值△與綜合表中各密度級的灰分相加，即得各密度級的校正灰分。(2)第二種方法：△>0.2%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(diào)整各密度級質(zhì)量百分?jǐn)?shù)。由于之前在篩分試驗(yàn)和浮沉試驗(yàn)中灰分已逐步校正完畢，所以在浮沉試驗(yàn)綜合表中灰分差值為0，不用再進(jìn)行重復(fù)校正。表3-15A、B層煤50-0.5mm粒級浮沉試驗(yàn)綜合表Tab.3-15A,Btwolayersofcoallevel50-0.5mmfugitivedusttest密度/kg·L-1A層B層綜合校正本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)20.6886.2020.025.304.143.0920.59100.000.85100.009.6440.199.332.471.931.449.6074.600.6475.236.199.1417.1428.8640.9458.6980.3921.3716.2621.347.1617.732.671.050.740.679.99100.000.44100.003.278.111.220.480.340.314.5718.300.0818.382.387.0414.5420.6525.5050.8669.6123.9428.7823.9613.9052.0011.363.182.441.8815.26100.000.76100.0012.9248.3010.552.952.271.7514.1792.900.7293.625.228.7916.8427.5338.6357.3176.9121.8817.6621.8513.9052.0011.363.182.441.8815.26100.000.76100.0012.9248.3010.552.952.271.7514.1792.900.7293.625.228.7916.8427.5338.6357.3176.9121.8817.6621.853.3.3原煤可選性評定根據(jù)表3-15兩層煤50~0.5mm級浮沉試驗(yàn)綜合表的計(jì)算，做出入選原煤0.5~50mm粒級浮沉試驗(yàn)綜合表，見表3-16。表3~1650~0.5mm混合入選煤浮沉試驗(yàn)綜合表Tab.3-16A,Btwolayersofcoallevel0.5-50mmfugitivedusttest密度級/kg·L-1入選原煤浮物累計(jì)沉物累計(jì)±0.1密度/kg·L-1產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%密度級/kg·L-1產(chǎn)率/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8合計(jì)煤泥總計(jì)13.9052.0011.363.182.441.8815.26100.000.76100.005.228.7916.8427.5338.6357.3176.9121.8817.6621.8513.9065.9077.2680.4482.8884.76100.005.228.049.3310.0510.8911.9221.85100.0086.1134.1222.7619.5817.1415.2621.8524.5248.4864.2870.2574.7576.9165.9063.3614.545.624.321.883.3.4原煤可選性曲線圖3-250~0.5mm混合入選煤可選性曲線Fig.3-2Classificationin50-0.5mmgradedrawcoalwashabilitycurve分析表3-16浮沉試驗(yàn)結(jié)果綜合表及圖3-2可選性曲線可知：該煤的主導(dǎo)密度級為1.3-1.4kg/L，其產(chǎn)率為52.00%，灰分為8.79%。當(dāng)精煤灰分定為9%時，精煤產(chǎn)率為75.38%；中煤灰分為35.42%，中煤產(chǎn)率為9.36%；矸石灰分為77%，矸石產(chǎn)率為15.26%。當(dāng)精煤灰分定為9.5%時，精煤產(chǎn)率為78.11%；中煤灰分為40.41%，中煤產(chǎn)率為6.63%；矸石灰分為77%，矸石產(chǎn)率為15.26%。當(dāng)精煤灰分定為10.0%時，精煤產(chǎn)率為80.25%；中煤灰分為46.21%，中煤產(chǎn)率為4.49%；矸石灰分為77%，矸石產(chǎn)率為15.26%。3.4分級入選將兩層煤從13mm粒級進(jìn)行分級，分別進(jìn)行浮沉試驗(yàn)，之后將得到的結(jié)果分別整理到兩層煤自然級與破碎級浮沉試驗(yàn)綜合表中，之后將兩層煤進(jìn)行資料綜合，得到浮沉試驗(yàn)綜合表，其整理綜合方法，與之前的表格計(jì)算方法相同，整理后，分別畫出50~13mm，13~0.5mm粒級的原煤可選性曲線，進(jìn)行之后的分析。根據(jù)自定精煤灰分，查出浮物產(chǎn)率、沉物產(chǎn)率、分選密度。從而確定精煤產(chǎn)率、中煤產(chǎn)率、矸石產(chǎn)率、及各個產(chǎn)物的灰分。方便之后進(jìn)行選煤方案以及工藝流程的制定。表3-17A層煤50~13mm自然級與破碎級浮沉試驗(yàn)綜合表Tab.3-17TheresultsofAcoalbedof50~13mmnatural-levelandcrushgradefloat-and-sinktest密度/kg·L-1自然級破碎級綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)5.6955.7612.793.242.822.8216.93100.000.61100.000.979.492.180.550.480.482.8817.020.1017.116.489.9318.3829.3341.5457.7584.0326.2315.0026.165.2351.1511.732.982.592.5923.79100.000.61100.000.373.650.840.210.180.181.707.140.047.186.489.9218.3829.3341.5357.7883.9530.9815.0030.905.5554.3912.483.172.752.7518.96100.000.61100.001.3413.143.010.760.660.664.5824.160.1524.306.489.9318.3829.3341.5357.7684.0027.6315.0027.56表3-18B層煤50~13mm自然級與破碎級浮沉試驗(yàn)綜合表Tab.3-18TheresultsofBcoalbedof50~13mmnatural-levelandcrushgradefloat-and-sinktest密度/kg·L-1自然級破碎級綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)19.7646.297.802.831.941.7819.60100.000.48100.001.553.630.610.220.150.141.547.850.047.882.798.6917.2726.0229.9151.5975.8523.0330.7623.0615.6536.686.182.241.531.4136.31100.000.44100.440.431.000.170.060.040.040.992.730.012.742.798.6817.2626.0229.9151.5975.8133.9630.7333.9418.7043.827.382.681.831.6923.91100.000.47100.001.984.630.780.280.190.182.5310.570.0510.622.798.6917.2726.0229.9151.5975.8325.8430.7625.87表3-19A層煤13~0.5mm自然級與破碎級浮沉試驗(yàn)綜合表Tab.3-19TheresultsofAcoalbedof13~0.5mmnatural-levelandcrushgradefloat-and-sinktest密度/kg·L-1自然級破碎級綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)16.8654.9312.833.472.571.587.77100.000.96100.005.9919.524.561.230.910.562.7635.540.3435.896.148.7616.5528.6540.6359.4977.1516.9416.6416.9715.4950.5311.803.192.361.4515.17100.000.96100.002.317.531.760.480.350.222.2614.900.1415.056.148.7616.5528.6540.6459.5077.0221.7616.6421.7116.4653.6312.533.382.511.549.95100.000.96100.008.3027.056.321.711.260.785.0250.440.4950.946.148.7616.5528.6540.6359.4977.0918.3716.6418.37表3-20B層煤13~0.5mm自然級與破碎級浮沉試驗(yàn)綜合表Tab.3-20TheresultsofBcoalbedof13~0.5mmnatural-levelandcrushgradefloat-and-sinktest密度/kg·L-1自然級破碎級綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)17.7747.636.032.681.991.7822.13100.000.38100.001.022.730.350.150.110.101.275.740.025.761.744.859.6712.8619.6149.8561.9418.5325.4718.5513.9437.434.712.101.561.4038.85100.000.40100.000.280.750.090.040.030.030.771.990.012.001.754.909.7712.9519.6349.8161.8629.4525.5729.4316.7945.015.692.531.881.6826.44100.000.39100.001.303.480.440.200.150.132.047.730.037.761.744.869.6912.8819.6149.8461.9121.3425.4921.35表3-21A、B層煤50-13mm粒級浮沉試驗(yàn)綜合表Tab.3-21Thetesttableoftwocoal0.5~25mmgradedrawcoalfugitivedust密度/kg·L-1A層B層綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)5.5554.3912.483.172.752.7518.96100.000.61100.001.3413.143.010.760.660.664.5824.160.1524.306.489.9318.3829.3341.5357.7684.0027.6315.0027.5618.7043.827.382.681.831.6923.91100.000.47100.001.984.630.780.280.190.182.5310.570.0510.622.798.6917.2726.0229.9151.5975.8325.8430.7625.879.5551.1810.933.022.472.4320.46100.000.57100.003.3217.773.791.050.860.847.1134.730.2034.924.289.6018.1528.4438.9156.4581.0927.0918.9827.04表3-22A、B層煤13~0.5mm粒級浮沉試驗(yàn)綜合表Tab.3-22Thetesttableoftwocoal13~0.5mmgradedrawcoalfugitivedust密度/kg·L-1A層B層綜合本級/%全樣/%灰分/%本級/%全樣/%灰分/%本級/%全樣/%灰分/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8小計(jì)煤泥總計(jì)16.4653.6312.533.382.511.549.95100.000.96100.008.3027.056.321.711.260.785.0250.440.4950.946.148.7616.5528.6540.6359.4977.0918.3716.6418.3716.7945.015.692.531.881.6826.44100.000.39100.001.303.480.440.200.150.132.047.730.037.761.744.869.6912.8819.6149.8461.9121.3425.4921.3516.5052.4911.623.272.421.5612.14100.000.88100.009.6030.536.761.901.410.917.0658.170.5258.705.558.3216.1027.0338.4758.1172.7018.7617.1518.76表3-23兩層煤50~13mm分級入選煤浮沉試驗(yàn)綜合表Tab.3-23Thetesttableoftwocoal50~13mmgradedrawcoalfugitivedust密度級/kg·L-1入選原煤浮物累計(jì)沉物累計(jì)±0.1密度/kg·L-1產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%產(chǎn)率/%灰分/%密度級/kg·L-1產(chǎn)率/%-1.31.3~1.41.4~1.51.5~1.61.6~1.71.7~1.8+1.8合計(jì)煤泥總計(jì)9.5551.1810.933.022.472.4320.46100.000.57100.004.289.6018.1528.4438.9156.4581.0927.0918.9827.049.5560.7371.6674.6777.1479.57100.005.228.7710.2010.9311.8313.1927.04100.0086.1134.1222.7619.5817.1415.2627.0430.9963.8086.9496.67104.8281.0960.7362.1013.945.494.902.43分級入選原煤50-13mm粒級原煤可選性曲線見圖3-3。分析表3-23浮沉試驗(yàn)結(jié)果綜合表及圖3-3可選性曲線可知：該煤的主導(dǎo)密度級為1.3-1.4kg/L，其產(chǎn)率為51.18%，灰分為9.6%。當(dāng)精煤灰分定為9.0%時，精煤產(chǎn)率為63.38%；中煤灰分為16.16%，中煤產(chǎn)率為31.05%；矸石灰分為80.00%，矸石產(chǎn)率為20.46%。當(dāng)精煤灰分定為9.5%時，精煤產(chǎn)率為67.60%；中煤灰分為36.01%，中煤產(chǎn)率為11.94%；矸石灰分為80%，矸石產(chǎn)率為20.46%。當(dāng)精煤灰分定為10.0%時，精煤產(chǎn)率為70.64%；中煤灰分為41.10%，中煤產(chǎn)率為8.9%；矸石灰分為80%，矸石產(chǎn)率為20.46%。分級入選50-13mm粒級原煤可選性曲線見圖3-3。圖3-350~13mm混合入選煤可選性曲線Fig.3-3Classificationin13-50mmgradedrawcoalwashabilitycurve表3-24兩層煤13~