年處理能力3.00Mta礦區(qū)型煉焦煤廠

1、PAGE 第28頁第28頁摘 要本設(shè)計為年處理能力3.00Mt/a礦區(qū)型煉焦煤廠。選煤廠工作制度為每年生產(chǎn)330天，每天16小時，兩班生產(chǎn)，一班檢修。本設(shè)計先對煤質(zhì)資料進(jìn)行審查、分析、校正、計算，分析原煤的可選性。在此基礎(chǔ)上，通過幾個可能的選煤工藝流程，對其進(jìn)行產(chǎn)品預(yù)測和技術(shù)、經(jīng)濟(jì)比較，選出最佳方案：原煤預(yù)先篩分經(jīng)檢查性手選后，+50mm入動篩跳汰機分選，分選出精煤，矸石。分選后精煤破碎與50nn篩下物進(jìn)三產(chǎn)品重介旋流器分選出精煤、中煤、矸石三種產(chǎn)品。煤泥水采用煤泥直接浮選作業(yè)，浮選精煤經(jīng)加壓過濾機脫水，濾餅作為最終精煤產(chǎn)品，尾煤先經(jīng)濃縮機濃縮，濃縮機底流用壓濾機壓濾，濾液和濃縮機的溢流作為循

2、環(huán)水使用。方案確定后，進(jìn)行介質(zhì)、數(shù)質(zhì)量流程計算。依據(jù)計算結(jié)果，進(jìn)行設(shè)備選型。設(shè)備選型時，在滿足工藝要求的前提下，優(yōu)先采用技術(shù)先進(jìn)、性能可靠、效率高、能耗低、成熟可靠的設(shè)備。在工藝布置時，做到生產(chǎn)流程通暢，設(shè)備布置緊湊，并便于安裝、操作和檢修。在總平面布置上，對輔助生產(chǎn)設(shè)施進(jìn)行了規(guī)劃，兼顧了環(huán)保的要求。按生產(chǎn)方案生產(chǎn)，產(chǎn)品指標(biāo)如下：精煤：產(chǎn)率，54.06%；灰分，7，50%；中煤：產(chǎn)率，14.22%；灰分，23.00% ；矸石：產(chǎn)率，17.93%；灰分，85.10%；煤泥：產(chǎn)率：13.78%；灰分，26.50%；關(guān)鍵詞： 選煤廠設(shè)計 動篩跳 汰 三產(chǎn)品重介旋流器3.00Mt / a Chaili

3、 (mine type) Preparation Plant DesignAbstractThe design for the annual processing capacity of 3.00Mt / a coking coal mine type plant . CPP working system for the production of 330 days a year , 16 hours a day , two- shift production , maintenance intervals .The design of the first review of coal qua

4、lity information , analysis, calibration , calculation, analysis of raw coal washability . On this basis , several possible coal preparation process through its product and technology forecasting , economic comparisons , choose the best solution: after coal pre-screening of hand-selected by check ,

5、+50 mm sieve jigging into action machine sorting , sub- elect coal, gangue . After sorting coal crushing and 50nn sieve material into three product heavy medium cyclone elected coal, coal , gangue three products . Slime slime water using direct flotation , flotation concentrate dewatering by pressur

6、e filter cake as the final coal products, first by the end of coal concentrate thickener , thickener underflow filter press filter press , and the filtrate concentrated overflow machine as recycled water use .After the plan was finalized, carried out the media , the number of mass flow calculations.

7、 Based on the results, for device selection. Equipment selection , to meet the technological requirements of the premise, give priority to advanced technology, reliable performance, high efficiency, low energy consumption, mature and reliable equipment. In the process layout , so smooth production p

8、rocesses , equipment, compact layout and ease of installation, operation and maintenance. The general layout of auxiliary production facilities planning , taking into account the environmental requirements.Press production program production, product indicators are as follows :Clean Coal : yield , 5

9、4.06% ; ash , 7.50 % ;Coal : yield , 14.22% ; ash , 23.00% ;Gangue : yield , 17.93% ; ash , 85.10% ;Slime : Yield: 13.78% ; ash , 26.50% ;Keywords:Coal Preparation Plant design moving sieve jigging three product heavy medium cyclone1 概論1.1、選煤廠類型、廠型柴里選煤廠主要入洗A、B兩種原煤，是一座礦區(qū)型選煤廠，設(shè)計入洗能力為3.00Mt/a。1.2、工作制度按

10、煤炭洗選工程設(shè)計規(guī)范GB50359-2005的規(guī)定，本選煤廠的工作制度為年工作330d，每天工作16h。二班生產(chǎn)，一班檢修。1.3、礦區(qū)及廠址概況本選煤廠坐落在巨野煤田的中南部，廠址設(shè)在山東省市巨野縣境內(nèi)，東距巨野縣 20km、濟(jì)寧市65km。西距菏澤市40km。經(jīng)礦區(qū)專用鐵路東可經(jīng)兗州與京滬和兗石鐵路相接,西可至菏澤、新鄉(xiāng)與京九、京廣鐵路相通 ，交通極為便利。1.4、原料煤礦井概況井田面積 180平方公里，含可采煤層6層，其中主采煤平均厚度8.82米，煤種以1/3焦煤為主，屬低灰、低硫、低磷、高發(fā)熱量的優(yōu)質(zhì)煉焦煤。全井田地質(zhì)儲量16.831.5、選煤工藝柴里選煤廠擬采用A礦與B礦坑口原煤57

11、%:43%入洗，根據(jù)原始煤質(zhì)資料及用戶要求的灰分級別，原煤可選性屬難選。經(jīng)過2種洗選工藝的比較，本廠采用動篩跳汰排矸末煤三產(chǎn)品重介質(zhì)旋流器分選煤泥直接浮選工藝。原煤經(jīng)過50mm分級篩分，+50mm經(jīng)檢查性手選后入動篩跳汰機排矸后進(jìn)行破碎至-50mm，與篩下物合并后，進(jìn)入三產(chǎn)品重介旋流器分選，產(chǎn)出精煤、中煤及矸石，精煤泥由分級旋流器分級后，進(jìn)入礦漿準(zhǔn)備器進(jìn)行浮選。最終精煤由末精煤、粗精煤泥以及浮選精煤合并組成，最終中煤由末中以及中煤泥合并組成；矸石即三產(chǎn)品重介旋流器二段分選矸石，尾煤泥經(jīng)煤泥晾干場晾干后作為煤泥產(chǎn)品。1.6、產(chǎn)品品種及用途柴里選煤廠精煤產(chǎn)品主要用于煉焦配煤，亦可廣泛用于冶金、化工

12、、鑄造等行業(yè)。中煤供附近的電廠，矸石主要用于附近的矸石磚廠或鋪路，煤泥主要銷售給附近居民或供場內(nèi)鍋爐房使用。1.7、供水、供電1.7.1 水源生活及消防用水取自廠外生活及消防給水管網(wǎng)，其水量、水質(zhì)、水壓都能滿足生活用水要求；生產(chǎn)用水可取自處理后的礦井井下來水，也可來自水源井，水量、水質(zhì)都能滿足生產(chǎn)用水要求。1.7.2電源廠區(qū)設(shè)有變電所，電源引至10kVA高壓電網(wǎng)。經(jīng)廠區(qū)變電所將其變成動力用電、生活用電等級后供廠區(qū)生產(chǎn)、生活使用，因而電源有可靠保證。2 選煤工藝2.1煤質(zhì)資料分析及可選性研究建一座現(xiàn)代化煤炭洗選廠，對煤質(zhì)進(jìn)行分析和評述就是對煤進(jìn)行“號脈診斷”。設(shè)計就是依靠入洗原煤基礎(chǔ)資料,進(jìn)行透

13、徹煤質(zhì)分析，準(zhǔn)確把握原煤特性，設(shè)計出適合于入選原煤的實際特性工藝流程，為選煤廠洗選加工創(chuàng)造出更大的經(jīng)濟(jì)利益。眾所周知，由于成煤環(huán)境和成煤條件不同，形成了煤炭賦存狀況方面的差異。因而不同煤田、不同礦區(qū)的煤質(zhì)千差萬別，有時候即便同屬一塊煤田，但在不同的井田，甚至不同的采區(qū)，不同的層位，其煤質(zhì)的變化和區(qū)別也非常大。如何將被選原煤的“脈”號準(zhǔn)，是搞好選煤工藝設(shè)計必須重視的基礎(chǔ)問題。所以，建設(shè)現(xiàn)代化選煤廠，至關(guān)重要的問題是選煤工藝設(shè)計必須符合不同礦區(qū)的不同煤質(zhì)特性。為了進(jìn)一步了解煤的內(nèi)在性質(zhì)，以制定合理的選煤工藝流程，下面將原煤資料進(jìn)行如下分析：2.1.1煤質(zhì)資料的審查及分析一、資料可靠性分析對原煤資料

14、的分析，首先要特別重視煤質(zhì)資料的代表性。用不具代表性或代表性差的篩分、浮沉資料提供設(shè)計，是對設(shè)計的誤導(dǎo)，后果是嚴(yán)重的。因此，對煤質(zhì)資料的代表性問題應(yīng)該引起高度重視?，F(xiàn)將原煤資料可靠性分析如下：1、原煤礦樣是該廠設(shè)計入洗的蔣莊礦及柴里礦的煤質(zhì)資料，沒有用相鄰礦井和其它地質(zhì)資料作代資料，故該礦樣具有高度的代表性。2、該礦樣是經(jīng)過采樣，試驗，制樣，化驗，計算等工序完成的，各工序都可能產(chǎn)生誤差。如果誤差超過一定限度，不僅影響資料的準(zhǔn)確性和可靠性，甚至判定該資料不能使用，所以篩分、浮沉試驗都要按國家標(biāo)準(zhǔn)GB/T477-1998煤炭篩分試驗方法、GB478-87煤炭浮沉試驗方法和行業(yè)標(biāo)準(zhǔn)MT-93煤粉篩分

15、試驗方法、MT57-93煤粉浮沉試驗方法進(jìn)行審查。1）、試驗過程中試樣重量損失的審查：對篩分或浮沉試驗資料，試驗前后煤樣的重量的差值比不得超過2%。即 A礦煤樣 1=（煤樣總質(zhì)量-毛煤質(zhì)量）/煤樣總質(zhì)量=(5061-4997)/5061=1.3%2% 小于規(guī)定的重量損失百分?jǐn)?shù)，資料可用。B礦煤樣 2=（煤樣總質(zhì)量-毛煤質(zhì)量）/煤樣總質(zhì)量=(5870.3-5852.1)/5870.3=0.3%2% 小于規(guī)定的重量損失百分?jǐn)?shù)，資料可用。 2）、試驗結(jié)果的灰分差值：篩分試驗前總樣灰分與試驗后各粒級產(chǎn)物灰分的加權(quán)平均值的差值，以及浮沉試驗前煤樣灰分與試驗后各密度級產(chǎn)物灰分的加權(quán)平均值的差值，按其灰分不

16、同、粒度不同有不同的規(guī)定。3）、篩分試驗的審查：大篩分資料的審查：煤樣灰分小于20%時，相對誤差不得超過10%，即 ；煤樣灰分大于或等于20%時，絕對差值不得超過2%，即 。A礦煤樣 =24.46%， =24.65%，絕對誤差為0.19%符合要求。B礦煤樣 =28.59%， =28.46%，絕對誤差為0.13%符合要求；小篩分資料的審查：煤樣灰分小于10%時，絕對差值不得超過0.5%，即 ；煤樣灰分10-30%時，絕對差值不得超過1%，即 ；煤樣灰分大于30%時，絕對差值不得超過1.5%，即 。A礦 自然級： =23.07%， =23.37%，絕對誤差為0.30% 符合要求。 破碎級： =45

17、.67%， =46.29%，絕對誤差為0.62% 符合要求B礦 自然級： =23.64%， =23.24%，絕對誤差為0.4% 符合要求； 破碎級： =28.15%， =28.24%，絕對誤差為0.09% 符合要求4）、浮沉資料的審查：對于浮沉資料，粒度大于或等于25mm時，煤樣灰分20%，相對差值不超過10%；煤樣灰分20%，絕對差值不超過2%；最大粒度小于25mm時，煤樣灰分0.2時,采用調(diào)整各密度級的數(shù)量,各密度級的灰分不變,使其實驗前后的灰分相等。=100（A后-A前）/（A+1.8-A-1.8） （2-4）式中：為調(diào)整的數(shù)量，%A前校正前灰分，%A后校正后灰分，% A+1.8+1.8

18、密度級灰分，%A-1.8-1.8密度級灰分，%在A后A前的情況，為負(fù)值，即+1.8密度級減量，而-1.8累計的密度級增量。在計算出以后，還應(yīng)該用比例關(guān)系分別計算出-1.8每一個密度級調(diào)整后的數(shù)量百分?jǐn)?shù)n=n（1-/-1.8） （2-5）式中：n-1.8中的某密度級n調(diào)整后的數(shù)量百分?jǐn)?shù)，%n-1.8中的某密度級n調(diào)整前的數(shù)量百分?jǐn)?shù)，%-1.8-1.8所有密度級數(shù)量百分?jǐn)?shù)的累計數(shù)，%2.1.3煤質(zhì)資料的分析 為了采用合理正確的工藝方法，將煤質(zhì)資料的數(shù)據(jù)規(guī)律和分析內(nèi)容與選煤方法的選擇、工藝環(huán)節(jié)的設(shè)置、流程的制定、甚至與產(chǎn)品的定向定位結(jié)合起來，為下一步工藝設(shè)計做基礎(chǔ)，現(xiàn)將煤質(zhì)特征分析如下：1 原煤工業(yè)

19、分析： 表2-1-1 B礦篩分總樣化驗結(jié)果項目煤樣水分灰分揮發(fā)分全硫發(fā)熱量膠質(zhì)層GR.I/%Mad /%Ad /%Vdaf /%St,d %Qgr,d /(MJ/kg)X /mmY/ mm毛煤1.9224.46390.63025.190凈煤(1.4)0.366.17360.44082全水 Mt4.20%煤質(zhì)牌號1/3JM（1）由原煤的工業(yè)分析，由揮發(fā)分Vdaf(%)=36，煤粘結(jié)性指數(shù)G=82可以將煤炭分類確定牌號，查煤化學(xué)（P150），確定此煤質(zhì)牌號為1/3焦煤。（2） 從表2-1-1中可以知道其硫分和灰分，根據(jù)選煤工藝設(shè)計與管理P40表3-1可知，此煤灰分為24.46%，屬于中灰煤；硫分為

20、0.630%，屬于低硫煤，故初步確定在洗選加工工藝中可以不考慮脫硫。表2-1-2 A礦篩分總樣化驗結(jié)果項目煤樣水分灰分揮發(fā)分全硫發(fā)熱量膠質(zhì)層GR.I/%Mad /%Ad /%Vdaf /%St,d %Qgr,d /(MJ/kg)X /mmY/ mm毛煤2.8428.59411.21023.670凈煤(1.4)1.056.74360.78074全水 Mt6.20%煤質(zhì)牌號1/3JM1）由原煤的工業(yè)分析，由揮發(fā)分Vdaf(%)=36，煤粘黏結(jié)性指數(shù)G=74可以將煤炭分類確定牌號，查煤化學(xué)（P150），確定此煤質(zhì)牌號為1/3焦煤。（2） 從表2-1-2中可以知道其硫分和灰分，根據(jù)選煤工藝設(shè)計與管理P

21、40表3-1可知，此煤灰分為28.59%，屬于中灰煤；硫分為1.210%，屬于低中硫煤，故初步確定在洗選加工工藝中可以不考慮脫硫。原煤的篩分資料分析 A礦表2-1-3 A礦原煤篩分實驗報告表篩分前煤樣總重量5061Kg灰分K1=57%粒級/mm產(chǎn)物名稱重量/Kg占本級/%占全樣/%灰分/%校正灰分/%12345.006.007.008.00100手 選煤219.004.382.5011.5211.33夾矸煤硫化煤矸石182.003.642.0894.6294.43小計401.008.024.5749.2449.0510050手 選煤359.007.184.1011.3611.17夾矸煤17.0

22、00.340.1947.9347.74硫化煤矸石189.003.782.1694.5794.38小計565.0011.316.4440.3040.1150合計966.0019.3311.0244.0143.825025煤514.0010.295.8635.1134.922513煤908.0018.1710.3619.5019.31136煤669.0013.397.6316.3516.1663煤734.0014.698.3715.0714.8830.5煤865.0017.319.8717.3217.130.50煤341.006.823.8923.1923.00500合計4031.0080.674

23、5.9820.0119.82毛煤總計4997.00100.0057.0024.6524.46通過對A礦大樣資料的分析，從表3中可以看出： 1）+50mm粒級情況：大塊可見矸的含量7.42%，大于5%，屬于高矸，初步判定需要機械排矸。（2）各粒級的含量分析：原煤各粒級的質(zhì)量百分?jǐn)?shù)相近，原煤的粒度分布均勻。（3）各粒級的質(zhì)量分析： -0.5mm級的灰分比相鄰粒度級的灰分低但比原煤灰分低，說明矸石沒有明顯的泥化現(xiàn)象。表2-1-4 B礦原煤篩分實驗報告表篩分前煤樣總重量5870.3Kg灰分K2=43%粒級/mm產(chǎn)物名稱重量/Kg占本級/%占全樣/%灰分/%校正灰分/%12345678100手 選煤95

24、.201.630.709.329.45夾矸煤硫化煤矸石46.000.790.3479.9780.10小計141.202.411.0432.3432.4710050手 選煤859.4014.696.3115.4815.61夾矸煤12.600.220.0918.2618.39硫化煤矸石315.405.392.3281.9082.03小計1187.4020.298.7233.1533.2950合計1328.6022.709.7633.0733.205025煤1181.0020.188.6828.9329.062513煤1638.0027.9912.0427.8427.97136煤759.4012.9

25、85.5825.8826.0163煤422.207.213.1024.5424.6730.5煤433.407.413.1824.7824.910.50煤89.501.530.6623.2423.37500合計4523.5077.3033.2427.1027.24毛煤總計5852.10100.0043.0028.4628.59通過對B礦大樣資料的分析，從表2-1-4 中可以看出：（1）+50mm粒級情況：大塊可見矸的含量6.18%，大于5%，屬于高矸，初步判定需要機械排矸。（2）各粒級的含量分析：原煤主導(dǎo)粒級25-13mm，占原煤總樣的27.99%。+50mm粒級的含量較多，占22.70%；6-

26、0mm含量少，占16.15%，說明該煤較硬。（3）各粒級的質(zhì)量分析：原煤的灰分隨著粒度的減少而降低，說明煤較脆。-0.5mm級的灰分比原煤和相鄰粒度級的灰分均低，說明矸石不易泥化。綜合以上分析，兩種煤樣牌號相同，都屬1/3焦煤，根據(jù)目前煤炭工業(yè)對煤炭的綜合利用，該煤種的揮發(fā)分中等偏高有較強的粘結(jié)性，它既能單獨煉焦也是良好的配煤煉焦的基礎(chǔ)煤。且性質(zhì)基本相近，硫分含量懸殊3、原煤浮沉資料分析根據(jù)前面所述的原煤浮沉資料的審查，該資料準(zhǔn)確可信，對指導(dǎo)設(shè)計有很大的作用，下面將兩礦的浮沉資料分析如下：表2-1-5 A礦自然級500.5mm級浮沉試驗結(jié)果綜合報告表篩分5025mm2513mm136mm63m

27、m30.5mm500.5mm浮沉%A%A%A%A%A%A%密度級10.2934.9218.1719.3113.3916.1614.6914.8817.3117.1373.8419.53Kg/LR%Y%A%R%Y%A%R%Y%A%R%Y%A%R%Y%A%R%Y%A%2.029.112.9988.5410.681.9385.136.760.983.955.420.7883.058.91.5180.4311.118.1185.18合計10010.2634.9310018.0619.2410013.2515.9810014.4314.541001716.910073.0119.38帶泥99.7810.

28、2634.9399.4118.0619.2498.9913.2515.9898.2214.4314.5498.231716.998.8773.0119.38煤泥0.220.0231.910.590.1131.331.010.1434.011.780.2633.781.770.3129.921.130.8332.03總計10010.2934.9210018.1719.3110013.3916.1610014.6914.8810017.3117.1310073.8419.53A礦煤浮沉資料分析由表2-1-5可知: （1）50-0.5mm級可以看出該礦的主導(dǎo)密度級為1.30-1.40kg/L，占該礦

29、樣的50-0.5mm級的44.34%，占該礦全樣的32.38%。小于1.4kg/L多占全礦樣的71.87%，+2.0kg/L密度級的含量較相鄰的密度級稍有增加；（2）浮沉煤泥灰分高于其他3-0.5mm級灰分，也高于相鄰每個粒級的總灰分，煤泥量不大，說明矸石稍有泥化現(xiàn)象。A礦煤浮沉資料分析表2-1-6 B礦自然級500.5mm級浮沉試驗結(jié)果綜合報告表浮沉5025mm2513mm136mm63mm30.5mm500.5mm產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%密度級20.1829.0627.9927.9712.9826.017.2124.677.4124.91產(chǎn)率灰分%Kg/

30、L占本級%占全樣灰分%占本級%占全樣灰分%占本級%占全樣灰分%占本級%占全樣%灰分%占本級%占全樣%灰分%占本級%占本層%占全樣%-1.332.872.735.0133.383.775.2620.001.023.8126.050.724.1828.100.765.2429.8620.969.014.931.31.430.152.518.8429.543.339.2840.842.096.9937.401.037.7135.250.967.4132.8623.079.928.341.41.57.500.6223.188.340.9423.0211.620.5916.9110.570.2916.9

31、710.480.2916.249.066.362.7320.381.51.61.340.1133.841.900.2134.162.630.1330.143.360.0929。423.330.0929.712.131.500.6431.951.61.71.840.1542.762.430.2740.281.910.1037.301.800.0538.482.380.0638.012.121.490.6440.051.71.81.180.1050.081.440.1643.301.320.0745.341.550.0444.961.420.0447.601.360.950.4145.841.82

32、.01.210.1060.561.670.1950.501.680.0955.291.680.0556.562.720.0761.101.641.150.4955.54+2.023.911.9984.7521.222.3986.7220.001.0284.5817.580.4884.1416.320.4484.1320.9814.736.3385.38合計100.008.3128.88100.0011.2727.91100.005.1225.53100.002.7623.89100.002.7223.75100.0070.2030.1927.03煤泥4.180.3633.366.360.772

33、8.848.240.4631.3511.090.3430.9614.520.4631.767.355.572.3930.88總計100.008.6829.06100.0012.0427.97100.005.5826.01100.003.1024.673.1824.91100.0075.7732.5827.31B礦煤浮沉資料分析由表2-1-6可知:1）50-0.5mm級可以看出該礦的主導(dǎo)密度級為1.3-1.4kg/L，占該礦樣的50-0.5mm級的32.86%，占該礦全樣的23.07%。-1.4kg/L密度級的含量較多占本礦樣的44.03%。1.4-2.0kg/L密度級的含量少，+2.0kg/L

34、密度級的含量增多，綜上可以發(fā)現(xiàn)，該煤樣的密度分布是“兩頭多中間少”，可以粗略的判斷出，該煤樣在灰分要求不低的情況下可選性較好。在具體的灰分要求下，用0.1鄰近密度物含量法來判定煤的可選性。（2）浮沉煤泥灰分略高于其他3-0.5mm級灰分，也高于相鄰每個粒級的總灰分，煤泥量不大，說明矸石稍有泥化現(xiàn)象。（1）50-0.5mm級可以看出該礦的主導(dǎo)密度級為1.30-1.40kg/L，占該礦樣的50-0.5mm級的44.34%，占該礦全樣的32.38%。小于1.4kg/L多占全礦樣的71.87%，+2.0kg/L密度級的含量較相鄰的密度級稍有增加；（2）浮沉煤泥灰分高于其他3-0.5mm級灰分，也高于相

35、鄰每個粒級的總灰分，煤泥不大，說明矸石稍有泥化現(xiàn)象。4、原煤破碎級50-0.5mm篩分浮沉試驗報告分析表2-1-7 A礦原煤破碎級50-0.5mm篩分浮沉試驗表浮沉5025mm2513mm136mm63mm30.5mm500.5mm產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%密度級8.435.5642.981.8437.451.2234.031.5231.64產(chǎn)率灰分%Kg/L占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%占全樣%-1.310.960.925.7213.550.754.9516.54

36、0.3037.4528.900.354.8734.440.515.2615.332.831.618.701.31.427.802.338.0635.261.957.3342.540.788.8127.910.348.7527.560.418.5631.495.813.317.991.41.58.700.7315.887.000.3916.598.120.1517.427.380.0917.614.330.0617.287.701.420.8116.411.51.62.180.1823.731.830.1024.622.960.0527.363.080.0426.033.070.0523.732

37、.280.420.2424.611.61.72.250.1934.221.220.0736.082.000.0436.171.550.0233.341.430.0231.131.810.330.1934.571.71.80.700.0647.710.510.0343.951.350.0242.870.980.0140.431.280.0235.920.770.140.0843.951.82.01.860.1654.931.160.0660.121.030.0254.521.720.0251.681.950.0349.261.560.290.1655.26+2.045.543.8292.6839

38、.472.1993.0925.550.4791.5128.470.3491.5225.940.3888.3839.057.204.1192.45合計100.008.4049.10100.005.5442.97100.001.8337.38100.001.2133.82100.001.4730.43100.0018.4510.5143.61煤泥0.340.0339.470.410.0244.330.720.0147.411.140.0152.643.040.0570.080.670.120.0754.00總計100.008.4349.07100.005.5642.98100.001.8437.4

39、5100.001.2234.03100.001.5231.64100.0018.5710.5943.68A礦破碎級篩分浮沉資料分析由表2-1-7中分析可知，該煤樣經(jīng)過破碎可得到較好的解離，得到部分低灰煤，但50mm以上粒級含量較少，僅占22.70%，且由于破碎時還導(dǎo)致細(xì)粒度增多，增大煤泥量，所以是否破碎需要經(jīng)過后續(xù)討論。表2-1-8B礦原煤破碎級50-0.5mm篩分浮沉試驗表浮沉5025mm2513mm136mm63mm30.5mm500.5mm產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%產(chǎn)率%灰分%密度級10.1338.986.7430.562.3426.921.3927.101.402

40、3.76產(chǎn)率灰分%Kg/L占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%灰分%占本級%占本層%占全樣%-1.322.092.225.1027.781.865.1334.000.794.9535.860.504.5049.990.654.6827.656.012.594.991.31.427.652.788.1033.182.229.3429.770.698.1028.280.398.2921.050.279.6429.236.352.738.611.41.56.310.6318.646.420.4317.577.540.1717.826

41、.760.0917.745.260.0720.486.441.400.6018.241.51.62.250.2331.222.300.1531.442.510.0630.482.050.0330.251.750.0233.142.250.490.2131.231.61.71.500.1539.961.760.1238.801.720.0439.401.640.0239.161.750.0242.451.630.350.1539.621.71.81.510.1545.261.360.0947.121.060.0246.561.230.0247.032.200.0361.161.440.310.1

42、347.451.82.01.490.1553.461.440.1056.441.400.0356.322.090.0359.174.500.0678.721.680.370.1658.98+2.037.213.7385.4525.771.7385.6221.990.5185.0222.090.3185.1913.500.1886.4229.686.452.7785.48合計100.0010.0439.12100.006.7030.57100.002.3226.86100.001.3927.05100.001.3023.32100.0021.749.3533.46煤泥0.860.0923.380

43、.510.0328.070.760.0234.640.600.0135.027.230.1029.371.130.250.1127.66總計100.0010.1338.98100.006.7430.56100.002.3426.92100.001.3927.10100.001.4023.76100.0021.999.4633.40B礦煤樣破碎級資料與A礦分析情況基本相同，在此不再過多討論。5. 原煤+50未破碎浮沉試驗報告分析表2-1-9 A礦+50未破碎浮沉試驗報告+50mm產(chǎn)率/%19.33密度級灰分/%43.82Kg/L占本級%占本層%灰分%-1.315.332.948.831.31.4

44、31.486.048.141.41.57.701.4816.551.51.62.280.4424.761.61.71.800.3534.711.71.80.770.1544.101.82.01.590.3155.47+2.039.047.4992.59合計100.0019.2043.75煤 泥0.700.1453.73總 計100.0019.3343.82表2-1-10 A礦+50未破碎浮沉試驗報告+50mm產(chǎn)率/%22.70密度級灰分/%33.20Kg/L占本級%占本層%灰分%-1.327.696.214.911.31.429.256.578.511.41.56.451.4518.131.5

45、1.62.250.5131.121.61.71.630.3739.521.71.81.440.3247.341.82.01.820.4158.92+2.029.476.6185.34小 計（去煤泥）100.0022.4433.26煤 泥1.140.2627.66總 計100.0022.7033.204、小篩分試驗資料分析：表2-1-11 A礦自然級0.5-0mm篩分試驗表試樣重量500g灰分：23.0048粒度/網(wǎng)目重量灰分/%校正灰分/%克占本級%占本層/%占全樣/%2020-4040-60135.0027.381.871.0721.1321.2760-8075.0015.211.040.5

46、924.0724.2180-10050.0010.140.690.3923.7723.91100-12048.009.740.660.3824.1024.24120-140140-160160-180180-20076.0015.421.050.6023.1823.32-200109.0022.111.510.8623.0223.16合 計493.001006.823.8922.8723.00表2-1-12 A礦破碎級0.5-0mm篩分試驗表試樣重量500g灰分：47.3399粒度/網(wǎng)目重量灰分/%校正灰分/%克占本級%占本層/%占全樣/%200.000.0020-400.000.0040-6

47、0108.0021.640.160.0934.5636.2360-8083.0016.630.130.0745.9547.6280-10057.0011.420.090.0549.4751.14100-12060.0012.020.090.0549.3951.06120-140140-160160-1801.67180-20085.0017.030.130.0748.3550.02-200106.0021.240.160.0950.4852.15合 計499.001000.760.4345.6747.34表2-1-13 B礦自然級0.5-0mm篩分試驗表試樣重量500g灰分：23.3731粒度

48、/網(wǎng)目重量灰分/%校正灰分/%克占本級%占本層/%占全樣/%200.000.000.0020-4035.407.160.110.0523.3823.1140-60233.3047.190.720.3123.4223.1560-80112.0022.650.350.1523.6423.3780-10055.1011.140.170.0723.6823.41100-12019.403.920.060.0323.9623.69120-1408.801.780.030.0122.9422.67140-1605.101.030.020.0124.8624.59160-1804.600.930.010.0

49、124.6024.33180-2007.201.460.020.0124.6224.35-20013.502.730.040.0226.5826.31合 計494.40100.001.530.6623.6423.37表2-1-14 B礦破碎級0.5-0mm篩分試驗表試樣重量500g灰分：27.0004粒度/網(wǎng)目重量灰分/%校正灰分/%克占本級%占本層/%占全樣/%200.000.000.0020-4038.107.670.240.0225.3424.1940-60110.5022.250.700.0724.7423.5960-8091.6018.440.580.0626.1625.0180-1

50、0070.7014.230.450.0426.9825.83100-12034.306.910.220.0227.6026.45120-14042.708.600.270.0329.8628.71140-16066.3013.350.420.0433.0331.88160-1806.901.390.040.0034.6233.47180-20024.704.970.160.0236.4235.27+20010.902.190.070.0139.5738.42合 計496.701003.130.3128.1527.00從小篩分表中看，兩礦的煤泥特性相似，將其特性分析如下：（1）煤泥各粒級的分布很

51、不均勻，40-80網(wǎng)目的含量較多；其余的粒度處在-200網(wǎng)目下粗粒煤灰分低于細(xì)粒灰分。 (2) 煤泥各粒級的灰分變化幅度很小，+200網(wǎng)目各粒級約為18%, 就是-200網(wǎng)目粒級灰分也只有20%左右，煤泥的平均灰分為18.38%。 2.1.4兩礦原煤可選性研究一、兩礦浮沉資料的整理及可選性研究 1、由表2-1-5和表2-1-6綜合整理得表2-1-15如下： 表2-1-15 A、B礦自然級50-0.5浮沉表密度級浮沉物浮物累計沉物累計分選密度0.1數(shù)量灰分產(chǎn)率灰分產(chǎn)率灰分密度級產(chǎn)率Kg/L占本級%占全樣%Ad%Ad%Kg/L%-1.328.5120.474.5828.514.58100.0022

52、.601.3068.031.31.439.5128.378.6968.036.9771.4929.781.4048.971.41.59.456.7919.5377.488.5031.9755.851.5012.121.51.62.671.9230.9380.159.2522.5271.091.604.611.61.71.941.3940.2482.089.9819.8576.501.702.961.71.81.020.7346.3183.1010.4217.9280.421.801.841.82.01.641.1856.2684.7411.3116.9082.471.901.64+2.015.

53、2610.9585.29100.0022.6015.2685.292.0016.08合 計100.0071.8022.60煤 泥3.842.8731.07總 計100.0074.6722.92將浮沉資料的整理總結(jié)如表2-1-15所示，為了能快速的繪制該煤種的可選性曲線，將上面的數(shù)據(jù)進(jìn)一步整理如下：表2-1-16 A、B兩礦自然級50-0.5煤可選性曲線坐標(biāo)數(shù)據(jù)計算表繪制可選性曲線曲線曲線曲線曲線曲線X1Y1X1Y1X1Y1X2Y2X2Y23.500.003.500.004.5814.264.5828.5122.600.001.3071.491.3031.978.6948.276.9768.03

54、29.7828.511.4031.971.4051.0319.5372.758.5077.4855.8568.031.5022.521.5087.8830.9378.819.2580.1571.0977.481.6019.851.6095.3940.2481.129.9882.0876.5080.151.7017.921.7097.0446.3182.5910.4283.1080.4282.081.8016.901.8098.1656.2683.9211.3184.7482.4783.101.9015.261.9098.3685.2992.3722.60100.0085.2984.742.00

55、83.9297.50100.0097.50100.00由此表畫出A、B礦自然級煤的可選性曲線如下圖2-1-1： 圖2-1-1 A、B兩礦自然級煤可選性曲線由分析表2-1-19浮沉試驗結(jié)果綜合表及圖2-1-1可選性曲線可知：（1）該礦的主導(dǎo)密度級為1.31.4 kg/L，其產(chǎn)率為28.37%，灰分為8.69%（2）該礦中2.0 kg/L密度級含量為15.26%，灰分為85.29%。這表明該煤綜合樣的高密度物含量高，因此該煤的總灰分也較高，為22.92%。（3）當(dāng)要求精煤灰分為8%時，理論精煤產(chǎn)率74%，理論分選密度為1.45kg/L，鄰近密度物含量為0%。根據(jù)煤炭可選性等級劃分標(biāo)準(zhǔn)，該煤的可選性

56、為極難難選煤。表2-17 分選密度0.1含量評定可選性方法0.1含量可選性等級10.0易選10.120.0中等可選20.130.0較難選30.140.0難選40.0極難選（5）、由于大于2.0kg/L的密度級的灰分為82.47%，假設(shè)排除的矸石全部為+2.0kg/L 的高密度物，該矸石的灰分較高。句話來說，想排除高灰矸石是比較容易的。 2、由表2-1-7和表2-1-8綜合整理得表2-1-17如下表2-1-17A、B兩礦破碎級50-0.5綜合浮沉表密度級浮沉物浮物累計沉物累計分選密度0.1數(shù)量灰分產(chǎn)率灰分產(chǎn)率灰分密度級產(chǎn)率Kg/L占本級%占全樣%Ad%Ad%Kg/L%-1.321.134.206

57、.4221.136.42100.0038.831.3051.561.31.430.436.048.2751.567.5178.8747.521.4037.531.41.57.111.4117.1958.668.6848.4472.171.509.381.51.62.270.4527.7160.939.3941.3481.621.603.991.61.71.720.3436.8162.6510.1539.0784.751.702.811.71.81.080.2246.1363.7410.7637.3586.961.801.891.82.01.620.3257.0865.3611.9136.268

58、8.181.901.62+2.034.646.8889.63100.0038.8334.6489.632.0035.45合 計100.0019.8638.83煤 泥0.890.1838.19總 計100.0020.0438.83由表2-1-16和表2-1-17可將A、B兩礦浮沉資料整理綜合如下：表2-1-18兩礦50-0.5mm自然級和破碎級浮沉試驗綜合表 密度級浮沉物浮物累計沉物累計分選密度0.1數(shù)量灰分產(chǎn)率灰分產(chǎn)率灰分密度級產(chǎn)率Kg/L占本級%占全樣%Ad%Ad%Kg/L%-1.326.9124.674.9026.914.90100.0026.121.3064.461.31.437.543

59、4.428.6164.467.0673.0933.931.4046.491.41.58.948.2019.1373.408.5335.5460.671.5011.531.51.62.582.3730.3275.989.2726.6074.641.604.471.61.71.891.7339.5777.8710.0124.0279.411.702.921.71.81.030.9546.2778.9110.4822.1382.811.801.851.82.01.641.5056.4480.5411.4221.0984.601.901.64+2.019.4617.8486.97100.0026.12

60、19.4686.972.0020.28合 計100.0091.6726.12煤 泥3.223.0531.48總 計100.0094.7126.29 將浮沉資料的整理總結(jié)如表2-1-18所示，為了能快速的繪制該煤種的可選性曲線，將上面的數(shù)據(jù)進(jìn)一步整理如下：表2-1-19 A、B兩礦可選性曲線坐標(biāo)數(shù)據(jù)計算表曲線曲線曲線曲線曲線X1Y1X1Y1X1Y1X2Y2X2Y23.500.003.500.004.9013.464.9026.9126.120.001.3073.091.3035.548.6145.687.0664.4633.9326.911.4035.541.4053.5119.1368.938