選煤廠設(shè)計(jì)課程設(shè)計(jì)指導(dǎo)書(計(jì)算版)

./《選煤廠設(shè)計(jì)》課程設(shè)計(jì)指導(dǎo)書科技大學(xué)煤炭學(xué)院王建忠編制《選煤廠設(shè)計(jì)》課程設(shè)計(jì)指導(dǎo)書該課程設(shè)計(jì)是在已確定的原料煤資料、選煤方法、入選上下限、大塊處理等條件下給定了原則工藝流程的前提下進(jìn)行的,容包括對(duì)原料煤性質(zhì)的分析、煤質(zhì)資料的綜合、工藝流程計(jì)算、對(duì)主要分選作業(yè)產(chǎn)品結(jié)構(gòu)進(jìn)行方案比較、對(duì)給定的工藝流程進(jìn)行評(píng)價(jià)和編寫設(shè)計(jì)說明書,目的是使學(xué)生系統(tǒng)復(fù)習(xí)所學(xué)課程、掌握選煤廠設(shè)計(jì)的基本原理和基本方法、得到最基本的實(shí)際技能訓(xùn)練、為畢業(yè)設(shè)計(jì)打下良好的基礎(chǔ)。一、設(shè)計(jì)任務(wù)1.設(shè)計(jì)一座年處理原煤能力為240萬噸的礦區(qū)型選煤廠。主要入洗某礦區(qū)A層和B層原煤,原煤牌號(hào)均為1/3焦煤,其中入洗量為A層70％,B層30％。選煤廠工作制度為年工作300天,每天兩班生產(chǎn),一班檢修,日工作14小時(shí)。產(chǎn)品要求：精煤灰分Ａd％＝9％～10％精煤水分Mt＜12％精煤用于煉焦中煤就地供發(fā)電站矸石進(jìn)行綜合利用2.設(shè)計(jì)一座年處理原煤180萬噸的礦井型選煤廠。主要入洗某礦區(qū)A層和B層原煤,原煤牌號(hào)均為1/3焦煤,其中入洗量為A層60％,B層40％。選煤廠工作制度為年工作300天,每天兩班生產(chǎn),一班檢修,日工作14小時(shí)。產(chǎn)品要求：精煤灰分Ａd％＝9％～10％精煤水分Mt＜12％精煤用于煉焦中煤就地供發(fā)電站矸石進(jìn)行綜合利用原煤資料見附表1、2、3、3′、4、7、8計(jì)算用表格見附表5、6、9、10、11、12、13、14、15、16、17、18、19、20選煤廠工藝流程圖見附圖二、設(shè)計(jì)容1.對(duì)設(shè)計(jì)用原始資料進(jìn)行全面分析,了解原煤性質(zhì),根據(jù)已制定的工藝流程、選煤方法及入選上下限,進(jìn)行資料的整理、綜合和校正,求得入選原煤的粒度組成和浮沉組成,從而獲得選煤產(chǎn)品的理論平衡表。2.根據(jù)工藝流程順序進(jìn)行各作業(yè)的數(shù)量、質(zhì)量和水量的計(jì)算,并列出各作業(yè)計(jì)算所得數(shù)據(jù)的匯總表,編制出洗選產(chǎn)品最終平衡表和水量平衡表。3.根據(jù)流程計(jì)算結(jié)果,對(duì)主要設(shè)備進(jìn)行選型和臺(tái)數(shù)的計(jì)算。4.初步掌握設(shè)備布置的基本要求。5.對(duì)制定的選煤工藝流程進(jìn)行分析、評(píng)述,并編寫課程設(shè)計(jì)說明書。說明書主要章節(jié)如下：〔1設(shè)計(jì)任務(wù)〔2原料煤資料特征及分析〔3工藝流程的計(jì)算〔4對(duì)工藝流程的評(píng)述〔5主要工藝設(shè)備的選型〔6跳汰車間與浮選車間設(shè)備布置說明〔7總平面布置說明〔8勞動(dòng)定員說明〔9結(jié)束語6、繪制原則工藝流程圖、設(shè)備聯(lián)系圖和總平面布置圖。三、設(shè)計(jì)進(jìn)度及注意事項(xiàng)設(shè)計(jì)進(jìn)度本課程設(shè)計(jì)隨《選煤廠設(shè)計(jì)》課程教學(xué)過程同步進(jìn)行,隨教學(xué)進(jìn)程由講課教師布置任務(wù),配合教學(xué)容進(jìn)行資料綜合分析、各作業(yè)流程計(jì)算和主要設(shè)備選型等。工藝流程圖、設(shè)備聯(lián)系圖、總平面布置圖、主廠房設(shè)備布置圖等均在本課程結(jié)束后,集中進(jìn)行繪制。設(shè)計(jì)注意事項(xiàng)1.計(jì)算選煤工藝流程,首先將各作業(yè)產(chǎn)品的產(chǎn)率<r％>全部計(jì)算出來并檢查是否平衡,然后再計(jì)算產(chǎn)量和其它工藝指標(biāo),最終進(jìn)行水量流程的計(jì)算。2.對(duì)原煤資料綜合時(shí)如產(chǎn)量<Ｑ>、水量<Ｗ>、液固比<Ｒ>、補(bǔ)加清水量<Ｌ>及礦漿量<Ｖ>等要求小數(shù)后一位有效數(shù)字,而對(duì)產(chǎn)率<r％>、灰分<Ａd％>及其它質(zhì)量指標(biāo)要求小數(shù)點(diǎn)后有效數(shù)字兩位。3.計(jì)算選煤作業(yè)<主再洗>采用近似公式法進(jìn)行計(jì)算。4.跳汰流程計(jì)算時(shí)要注意的問題,再洗機(jī)入料浮沉組成,即主洗中煤產(chǎn)品的浮沉組成,在計(jì)算時(shí)要注意占本級(jí)與占全樣的百分?jǐn)?shù)。主、再洗溢流產(chǎn)品中50-13mm及13-0.5mm級(jí)別含量可近似地設(shè)與原煤粒度組成相似,兩種級(jí)別的灰分,由于塊煤與末煤混合發(fā)送,所以設(shè)其灰分與50-0.5mm級(jí)別相同。不完善度：可?。芍鳎?.18,Ｉ再＝0.205.煤泥的處理,在計(jì)算選煤工藝流程時(shí),對(duì)于煤泥占本級(jí)和占全樣的問題,特別要注意不能混淆。在分選過程中,原生煤泥和次生煤泥也得到一定的精選作用,而且全部煤泥按一定比例分配到多個(gè)產(chǎn)品中。6.最終精煤灰分是由塊精煤、末精煤以及浮選精煤加權(quán)平均計(jì)算而得,在計(jì)算時(shí)允許計(jì)算結(jié)果的最終精煤灰分與建廠要求灰分相差在±0.5％圍。7.浮選作業(yè)因缺乏小浮沉和浮選試驗(yàn)資料,在計(jì)算中設(shè)浮選精煤灰分為10％時(shí),其精煤回收率取75％,本流程系采用直接浮選。8.主要車間設(shè)備布置,一般包括水洗作業(yè)、產(chǎn)品脫水、煤泥處理等,在本課程設(shè)計(jì)中以水洗機(jī)組布置為主,從緩沖倉(cāng)、給煤機(jī)、水洗跳汰設(shè)備、分級(jí)脫水篩及離心機(jī)等一個(gè)個(gè)機(jī)組進(jìn)行布置,個(gè)別設(shè)備可由同學(xué)根據(jù)布置方案決定取舍。機(jī)組設(shè)備相互間位置及聯(lián)系、運(yùn)輸及裝卸方式,以及有關(guān)溜槽等輔助設(shè)備的位置,布置時(shí)應(yīng)予留必要的空間。四、要求課程設(shè)計(jì)說明書要求書寫簡(jiǎn)明,將計(jì)算過程騰寫清楚,字跡工整,要注意的問題如下：1.說明書中文字與圖表應(yīng)很好配合,一般文字編寫到哪里,圖表就附在哪里,有機(jī)配合。2.書寫計(jì)算順序,應(yīng)按作業(yè)順序編寫<即作業(yè)Ⅰ、Ⅱ、Ⅲ>,例如當(dāng)書寫作業(yè)Ⅳ時(shí),應(yīng)首先簡(jiǎn)述應(yīng)用近似公式計(jì)算的理由,對(duì)指標(biāo)選用的依據(jù)及注明的來源,然后再書寫計(jì)算過程。3.曲線繪制需用曲線圖板,表格繪制需用三角板,避免徒手粗制濫造不嚴(yán)格的學(xué)習(xí)態(tài)度。4.繪圖時(shí)應(yīng)按規(guī)定比例,保持圖表清潔。附設(shè)計(jì)用原始資料及表格表1A層原煤工業(yè)分析表化驗(yàn)項(xiàng)目煤樣水分

Mad％灰分

Ad％揮發(fā)分

Vdaf％全硫

St,d％發(fā)熱量

<Mj/kg>

Qgr,d膠質(zhì)層GR·I％XmmYmm毛煤1.9224.4638.700.6325.19凈煤<1.4>0.366.1736.080.4482全水分Mt4.20％煤質(zhì)牌號(hào)1/3焦煤表2B層原煤工業(yè)分析表化驗(yàn)項(xiàng)目煤樣水分

Mad％灰分

Ad％揮發(fā)分

Vdaf％全硫

St,d％發(fā)熱量

<Mj/kg>

Qgr,d膠質(zhì)層GR·I％XmmYmm毛煤2.8428.5940.641.2123.67凈煤<1.4>1.056.7436.260.7856.012.074全水分Mt6.20％煤質(zhì)牌號(hào)1/3焦煤表3入廠原煤A層及B層篩分組成表粒級(jí)/mmA層K1=70％B層K2=30％綜合K1+K2=100%Γ％γ％Ad％Γ％γ％Ad％γ％Ad％12344=3×4=3×70%；7=6×30%；9=4+7；10=4、7加權(quán)5678910＞100煤夾矸矸石小計(jì)4.3833.6428.0253.0682.5495.61711.5294.6249.231.6080.7862.3940.4820.2360.7189.3279.9732.343.5502.7856.33511.2293.3847.32100～50煤夾矸矸石小計(jì)7.1850.3403.78211.3075.0290.2382.6487.91511.3647.9394.5740.2914.6850.2155.38920.294.4060.0641.6176.08715.4848.2681.9033.479.4350.3024.26514.00213.2848.0089.7737.3350～25煤10.2867.20035.1120.1816.05428.9313.25432.2925～13煤18.17112.72019.5027.9908.39727.8421.11722.8213～6煤13.3889.37216.3512.9963.89925.8813.27119.156～3煤14.68910.28215.077.2152.16424.5412.44616.723～0.5煤17.31012.11717.327.4062.22224.7814.33918.480.5～0煤6.8244.77723.191.5290.45923.245.23623.19總計(jì)煤100.0070.0024.65100.0030.0028.51100.0025.8150～0合計(jì)80.66856.46820.0177.31723.19527.1079.66322.07＞50合計(jì)19.33213.53244.0022.6836.80533.3520.33740.44表3′入廠原煤A層及B層篩分組成表粒級(jí)/mm

A層K1=60％

B層K2=40％綜合K1+K2=100%Γ％γ％

Ad％Γ％γ％

Ad％γ％

Ad％

1

2

3

4

5

6

7

8

9

10＞100煤夾矸矸石小計(jì)4.3833.6428.0252.6302.1854.81511.5294.6249.231.6080.7862.3940.6430.3140.9589.3279.9732.343.2732.4495.77311.0992.7846.43100～50煤夾矸矸石小計(jì)7.1850.3403.78211.3074.3110.2042.2696.78411.3647.9394.5740.2914.6850.2155.38920.295.8740.0862.1568.11615.4848.2681.9033.4710.1850.294.42514.90013.7448.0388.4036.58

50～25

煤10.2866.172

35.1120.1818.072

28.9314.24431.61

25～13

煤18.17110.903

19.5027.99011.196

27.8422.09923.73

13～6

煤13.3888.033

16.3512.9965.198

25.8813.23120.09

6～3

煤14.6898.813

15.077.2152.886

24.5411.69917.41

3～0.5

煤17.31010.386

17.327.4062.962

24.7813.34818.98

0.5～0

煤6.8244.094

23.191.5290.612

23.244.70623.20

總計(jì)

煤100.0060.00

24.65100.0040.00

28.51100.0026.2050～0合計(jì)80.66848.40120.0177.31530.92627.1079.32722.78

＞50合計(jì)19.33211.59944.0022.6859.07433.3520.67339.33表4＞50mm以50mm為界是默認(rèn)入選上限為50mm破碎至＜50mm以50mm為界是默認(rèn)入選上限為50mm粒級(jí)/mm

A層K3=13.532%K3表3第4列查得；K3表3第4列查得；K4表3第7列查得

B層K4=6.805%

綜合煤K3+K4=20.337%Γ％γ％

Ad％Γ％γ％

Ad％γ％

Ad％

校正前

Ad％

校正后＞50mm物料破碎至＜＞50mm物料破碎至＜50mm后由于試驗(yàn)誤差導(dǎo)致灰分容易變化,故需進(jìn)行灰分校正。以綜合前煤樣灰分為標(biāo)準(zhǔn),即表3中＞50mm合計(jì)灰分〔綜合灰分第10列Ad=40.44%為標(biāo)準(zhǔn)。故Ad破碎前=40.44%,Ad破碎后=39.98%,所以灰分校正系數(shù)Δ=Ad破碎前—Ad破碎后=0.46%＞0,故給第9列每一個(gè)灰分值加上0.46即為第10列校正后灰分值。1233=2×k3=2×k3；6=5×k4；8=3+6；9=3、6加權(quán)4567891050～2543.585.89748.0244.603.03540.228.93245.3745.8325～1328.783.89541.9329.682.02031.805.91538.4738.9313～69.521.28836.4010.290.70028.161.98833.5033.966～36.320.85532.986.140.41828.341.27331.4631.923～0.57.871.06530.596.160.41925.001.48429.0129.470.5～03.930.53246.293.130.21328.240.74541.1341.59總計(jì)100.0013.53242.77100.006.80534.4420.33739.9840.44表5＜50mm自然級(jí)原煤篩分組成綜合表粒級(jí)/mmA層K5＝56.468%B層K6＝23.195%綜合煤K5＋K6＝79.663%K5=表3第4列；kK5=表3第4列；k6=表3第7列；2=表3第4列；3=表3第5列；4=表3第7；5=表3第8列；6=2、4加權(quán)。γ％Ad％γ％Ad％γ％Ad％123456750～257.20035.116.05428.9313.25432.2925～1312.72019.508.39727.8421.11722.8213～69.37216.353.89925.8813.27119.156～310.28215.072.16424.5412.44616.723～0.512.11717.322.22224.7814.33918.480.5～04.77723.190.45923.245.23623.19總計(jì)56.46820.0123.19527.1079.66322.07表6入選原煤A、B層自然級(jí)和破碎級(jí)篩分組成綜合表粒級(jí)/mm自然級(jí)綜合K7＝79.663%破碎級(jí)綜合K8＝20.337%綜合煤K7＋K8＝100%K7=表5第6列；kK7=表5第6列；k8=表4第8列；2=表5第6列；3=表5第7列；4=表4第8；5=表4第10列；6=2+4；7=2、4加權(quán)。γ％Ad％γ％Ad％γ％Ad％123456750～2513.25432.298.93245.8322.18637.7425～1321.11722.825.91538.9327.03226.3513～613.27119.151.98833.9615.25921.086～312.44616.721.27331.9213.71918.133～0.514.33918.481.48429.4715.82319.510.5～05.23623.190.74541.595.98125.48總計(jì)79.66322.0720.33740.44100.0025.81該灰分25.81與表3中原煤綜合灰分25.81相同該灰分25.81與表3中原煤綜合灰分25.81相同參加浮沉的0.5～50mm綜合灰分為25.83%?！?5.81×100—25.48×5.981/〔100—5.981=25.83%表7A層煤50～0.5mm自然級(jí)和破碎級(jí)混合煤浮沉試驗(yàn)綜合表密度級(jí)/kg·L-1自然級(jí)K9=51.691%破碎級(jí)K10=13.00%混合煤K9+K10=64.691%K9=表5中k5減去原生煤泥〔未除去浮沉煤泥k9=56.468—K9=表5中k5減去原生煤泥〔未除去浮沉煤泥k9=56.468—4.777=51.691；k10=表4中k3除去破碎煤泥k10=13.532—0.532=13.00；總計(jì)=小計(jì)+浮沉煤泥；3=2×51.107；6=5×12.913；9=3+6；10=3、6加權(quán)；8=9/64.02Γ％γ％Ad％Γ％γ％Ad％Γ％γ％Ad％12345678910＜1.327.4414.0244.3115.281.9735.2624.9915.9974.431.3～1.444.2922.6358.8731.114.0177.9641.6326.6528.731.4～1.59.734.97318.977.620.98416.459.305.95718.551.5～1.63.061.56430.412.270.29324.632.901.85729.501.6～1.71.810.92540.411.790.23134.571.811.15639.241.7～1.80.780.39946.910.760.09843.970.780.49746.331.8～2.01.670.85356.821.580.20455.331.651.05756.53＞2.011.225.73485.1239.595.11392.4916.9410.84788.59小計(jì)100.0051.10719.48100.0012.91343.51100.0064.0224.33小計(jì)占總計(jì)98.8719.4899.3343.5198.9624.33煤泥1.130.58432.030.670.08754.051.040.67134.89總計(jì)100.0051.69119.62100.0013.0043.58100.0064.69124.43注意：計(jì)算時(shí)先填寫總計(jì)一欄占全樣的數(shù)據(jù),然后計(jì)算小計(jì)占總計(jì)的數(shù)據(jù)。1.13×51.691%=0.584；51.691—0.584=51.107；0.67×13.00%=0.087；13.00—0.087=12.913；0.584+0.087=0.671；64.691-0.671=64.02第9列數(shù)據(jù)/27.583為第8列數(shù)據(jù)表8B層煤50～0.5mm自然級(jí)和破碎級(jí)混合煤浮沉試驗(yàn)綜合表密度級(jí)/kg·L-1自然級(jí)K11=22.736%破碎級(jí)K12=6.592%綜合煤K11+K12=29.328%K11=表5中k6減去原生煤泥〔未除去浮沉煤泥k11=23.195—K11=表5中k6減去原生煤泥〔未除去浮沉煤泥k11=23.195—0.459=22.736；k12=表4中k4除去破碎煤泥k12=6.805—0.213=6.592；總計(jì)=小計(jì)+浮沉煤泥；3=2×21.065；6=5×6.518；9=3+6；10=3、6加權(quán)；8=9/27.583Γ％γ％Ad％Γ％γ％Ad％Γ％γ％Ad％12345678910＜1.329.496.2124.9526.931.7554.9928.887.9674.961.3～1.432.506.8468.3828.451.8548.6031.548.7008.431.4～1.58.971.89020.416.280.40918.258.332.29920.031.5～1.62.110.44531.992.190.14331.232.130.58831.811.6～1.72.090.44040.071.590.10439.641.970.54439.991.7～1.81.340.28245.871.400.09147.441.350.37346.251.8～2.01.700.35855.561.790.11759.021.740.47556.41＞2.021.804.59285.4231.372.04585.4824.066.63785.44小計(jì)100.0021.06527.70100.006.51834.79100.0027.58329.38小計(jì)占總計(jì)92.6527.7098.8734.7994.0529.38煤泥7.351.67130.881.130.07427.825.951.74530.75總計(jì)100.0022.73627.93100.006.59234.72100.0029.32829.46注意：計(jì)算時(shí)先填寫總計(jì)一欄占全樣的數(shù)據(jù),然后計(jì)算小計(jì)占總計(jì)的數(shù)據(jù)。7.35×22.736%=1.671；22.736—1.671=21.065；1.13×6.592%=0.074；6.592—0.074=6.518；1.671+0.074=1.745；29.328-1.745=27.583；第9列數(shù)據(jù)/27.583為第8列數(shù)據(jù)表9A、B層煤50～0.5mm自然級(jí)和破碎級(jí)混合煤浮沉試驗(yàn)綜合表密度級(jí)/kg·L-1A層煤自然級(jí)破碎級(jí)綜合K13=64.691%B層煤自然級(jí)破碎級(jí)綜合K14=29.328%綜合煤K13+K14=94.019%K13=表7第9列；k14=表8第9列；2=表7第8列；3=表7第9列；4=表7第10列；5=表8第8列；6=表8第9列；7=表8第10列；9=3+6；10=3、6加權(quán)；8=9/91.607；K13=表7第9列；k14=表8第9列；2=表7第8列；3=表7第9列；4=表7第10列；5=表8第8列；6=表8第9列；7=表8第10列；9=3+6；10=3、6加權(quán)；8=9/91.607；Γ％γ％Ad％Γ％γ％Ad％Γ％γ％Ad％12345678910＜1.324.9915.9974.4328.887.9674.9626.1623.9644.611.3～1.441.6326.6528.7331.548.7008.4338.5935.3528.661.4～1.59.305.95718.558.332.29920.039.018.25618.961.5～1.62.901.85729.502.130.58831.812.672.44530.061.6～1.71.811.15639.241.970.54439.991.861.70039.481.7～1.80.780.49746.331.350.37346.250.950.87046.301.8～2.01.651.05756.531.740.47556.411.671.53256.49＞2.016.9410.84788.5924.066.63785.4419.0917.48487.39小計(jì)100.0064.0224.33100.0027.58329.38100.0091.60325.85小計(jì)占總計(jì)98.9624.3394.0529.3825.85煤泥1.040.67134.895.951.74530.752.572.41631.90總計(jì)100.0064.69124.43100.0029.32829.46100.0094.01994.019=100-表6中煤泥5.981,說明表6中除去煤泥后全部參加浮沉,浮沉后的數(shù)量與浮沉前一致94.019=100-表6中煤泥5.981,說明表6中除去煤泥后全部參加浮沉,浮沉后的數(shù)量與浮沉前一致26.01該表說明0.5～50mm浮沉后灰分為26.01%,而浮沉前的灰分為表6中計(jì)算后的25.83該表說明0.5～50mm浮沉后灰分為26.01%,而浮沉前的灰分為表6中計(jì)算后的25.83注意：縱向加權(quán)為26.01,橫向加權(quán)為26.00。取26.01表10Ａ層煤50～0.5mm入選級(jí)浮沉組成綜合表密度級(jí)/kg·L-1

浮沉組成

浮煤累計(jì)↓+

沉煤累計(jì)↑+鄰近密度物含量γδp±0.1為相鄰密度級(jí)物料含量之和,如γδp±0.1為相鄰密度級(jí)物料含量之和,如δp=1.5kg/L時(shí)γδp±0.1=γ1.4～1.5+γ1.5～1.6=9.30+2.90=12.20Γ％

Ａd％Γ％

Ａd％Γ％

Ａd％δpγδp±0.1122=表7第8列；3=表7第10列；5=∑〔22=表7第8列；3=表7第10列；5=∑〔2×3/4；7=∑〔2×3/63456789＜1.324.994.4324.994.43100.0024.331.3密度為1.3時(shí)±0.1含量為〔1.2～1.3+〔1.3～1.4,其中,＜1.2的含量很少,認(rèn)為＜1.3的即是1.2～1.3的密度為1.3時(shí)±0.1含量為〔1.2～1.3+〔1.3～1.4,其中,＜1.2的含量很少,認(rèn)為＜1.3的即是1.2～1.3的66.621.3～1.441.638.7366.627.1275.0130.961.450.931.4～1.59.3018.5575.928.5233.3858.691.512.201.5～1.62.9029.5078.829.2924.0874.201.64.711.6～1.71.8139.2480.639.9621.1880.321.72.591.7～1.80.7846.3381.4110.3119.3784.161.8☆因?yàn)槿鄙?.8～1.9的數(shù)據(jù),故密度為1.8數(shù)據(jù)由可選性曲線上查得因?yàn)槿鄙?.8～1.9的數(shù)據(jù),故密度為1.8數(shù)據(jù)由可選性曲線上查得1.8～2.01.6556.5383.0611.2318.5985.741.91.65＞2.016.9488.59100.0024.3316.9488.592.0※

小計(jì)100.0024.33表11B層煤50～0.5mm入選級(jí)浮沉組成綜合表密度級(jí)/kg·L-1

浮沉組成

浮煤累計(jì)↓+

沉煤累計(jì)↑+鄰近密度物含量γδp±0.1為相鄰密度級(jí)物料含量之和,如γδp±0.1為相鄰密度級(jí)物料含量之和,如δp=1.5kg/L時(shí)γδp±0.1=γ1.4～1.5+γ1.5～1.6=8.33+2.13=10.46Γ％

Ａd％Γ％

Ａd％Γ％

Ａd％δpγδp±0.1122=表8第8列；3=表8第10列；5=∑〔22=表8第8列；3=表8第10列；5=∑〔2×3/4；7=∑〔2×3/63456789＜1.328.884.9628.884.96100.0029.381.3密度為1.3時(shí)±0.1含量為〔1.2～1.3+〔1.3～1.4,其中,＜1.2的含量很少,認(rèn)為＜1.3的即是1.2～1.3的密度為1.3時(shí)±0.1含量為〔1.2～1.3+〔1.3～1.4,其中,＜1.2的含量很少,認(rèn)為＜1.3的即是1.2～1.3的60.421.3～1.431.548.4360.426.7771.1239.311.439.871.4～1.58.3320.0368.758.3839.5863.921.510.461.5～1.62.1331.8170.889.0831.2575.611.64.101.6～1.71.9739.9972.859.9229.1278.821.73.321.7～1.81.3546.2574.2010.5827.1581.641.8☆因?yàn)槿鄙?.8～1.9的數(shù)據(jù),故密度為1.8數(shù)據(jù)由可選性曲線上查得因?yàn)槿鄙?.8～1.9的數(shù)據(jù),故密度為1.8數(shù)據(jù)由可選性曲線上查得1.8～2.01.7456.4175.9411.6325.8083.481.91.74＞2.024.0685.44100.0029.3824.0685.442.0※

小計(jì)100.0029.38.表12Ａ、Ｂ層煤50～0.5mm入選級(jí)浮沉組成綜合表密度級(jí)/kg·L-1浮沉組成浮煤累計(jì)↓+沉煤累計(jì)↑+鄰近密度物含量校正前校正后Γ%Αd%Γ%Αd%分選密度

<δp>γδp±0.1γδp±0.1為相鄰密度級(jí)物料含量之和,如γδp±0.1為相鄰密度級(jí)物料含量之和,如δp=1.5kg/L時(shí)γδp±0.1=γ1.4～1.5+γ1.5～1.6=9.01+2.67=11.68Γ%Αd%Γ%Αd%122=表9第8列；3=表9第10列；7=∑〔22=表9第8列；3=表9第10列；7=∑〔2×3/6；9=∑〔2×3/8；34567891011＜1.326.164.6126.164.4326.164.43100.0025.671.3密度為1.3時(shí)±0.1含量為〔1.2～1.3+〔1.3～1.4,其中,＜1.2的含量很少,認(rèn)為＜1.3的即是1.2～1.3的密度為1.3時(shí)±0.1含量為〔1.2～1.3+〔1.3～1.4,其中,＜1.2的含量很少,認(rèn)為＜1.3的即是1.2～1.3的64.751.3～1.438.598.6638.598.4864.756.8473.8433.211.447.601.4～1.59.0118.969.0118.7873.768.3035.2560.271.511.681.5～1.62.6730.062.6729.8876.439.0526.2474.521.64.531.6～1.71.8639.481.8639.3078.299.7723.5779.581.72.811.7～1.80.9546.300.9546.1279.2410.2121.7183.031.8☆因?yàn)槿鄙?.8～1.9的數(shù)據(jù),故密度為1.8數(shù)據(jù)由可選性曲線上查得因?yàn)槿鄙?.8～1.9的數(shù)據(jù),故密度為1.8數(shù)據(jù)由可選性曲線上查得1.8～2.01.6756.491.6756.3180.9111.1620.7684.721.91.67＞2.019.0987.3919.0987.21100.0025.6719.0987.212.0※小計(jì)100.0025.85100.0025.67小計(jì)占總計(jì)97.4325.8597.4325.67煤泥2.5731.902.5731.90總計(jì)100.0026.01100.0025.83浮沉資料的校正[標(biāo)準(zhǔn)的選取]以浮沉前篩分資料綜合表6中參加浮沉的各粒級(jí)綜合校正灰分〔25.83除去綜合浮沉表12中浮沉煤泥的灰分為標(biāo)準(zhǔn)。Ad篩=〔100××31.90/〔100-2.57=25.67%；〔也可以利用占全樣的數(shù)據(jù)計(jì)算：Ad篩=〔94.019××31.90/〔94.019-2.416=25.67%Ad浮為綜合浮沉表12中各密度級(jí)累計(jì)灰分為25.85%；Δ=Ad篩-Ad浮=25.67%-25.85%=-0.18%其絕對(duì)值＜0.2%；利用灰分校正法校正。絕對(duì)值大于0.2%時(shí)用數(shù)量調(diào)整法校正。將灰分差值Δ與綜合表中各密度級(jí)灰分相加,即得到各密度級(jí)的校正灰分。γδp±0.1的兩種計(jì)算方法1、不除矸計(jì)算法：γδp±0.1為相鄰密度級(jí)物料含量之和,如δp=1.5kg/L時(shí)γδp±0.1=γ1.4～1.5+γ1.5～1.6=9.30+2.90=12.202、扣矸計(jì)算法原煤中沉矸含量的多少雖對(duì)分選精度影響不大,但沉矸含量波動(dòng)將影響其它密度級(jí)的產(chǎn)率。為避免同一原煤因其含矸量的不同而可能被劃分為不同的可選性等級(jí)。國(guó)家標(biāo)準(zhǔn)規(guī)定,當(dāng)理論分選密度＜1.70kg/L時(shí),以扣除沉矸〔＞2.0后的量作為100%計(jì)算δ±0.1含量,即以γδp±0.1〔去矸的量來作為評(píng)定煤炭可選性的依據(jù),其計(jì)算方法如下：γδp±0.1〔去矸=γδp±0.1〔不去矸×100%/〔100-γ+2.0；當(dāng)理論分選密度≥1.70kg/L時(shí),以扣除低密度物〔＜1.50kg/L的量作為100%來計(jì)算δ±0.1含量,即以γδp±0.1〔去浮物的量來作為評(píng)定煤炭可選性的依據(jù),其計(jì)算方法如下：γδp±0.1〔去浮物=γδp±0.1〔不去浮物×100%/〔100-γ-1.5；。本例中,依據(jù)表12的數(shù)據(jù)繪制可選性曲線,當(dāng)要求精煤灰分為10%時(shí),δ±0.1含量為19.0%,理論分選密度為1.57kg/L,小于1.70kg/L,依據(jù)國(guó)標(biāo)規(guī)定,以扣除沉矸后的量作為100%來計(jì)算δ±0.1含量,即以γδ±0.1〔去矸的量來作為評(píng)定煤炭可選性的依據(jù)。故γδ±0.1〔去矸=γδ±0.1〔不去矸×100%/〔100%-γ＞2.0=19.0%×100%/〔100%-19.09%=23.5%根據(jù)中國(guó)煤炭可選性等級(jí)劃分標(biāo)準(zhǔn)可知,該原煤可選性等級(jí)為較難選。可以考慮采用跳汰或重介選煤。.下面是某原煤可選性曲線,分選過程只出精煤和尾煤兩種產(chǎn)品,并要求精煤灰分為10%,利用作圖法求：1、精煤理論產(chǎn)率,理論分選密度以及該分選密度±0.1kg/L含量。2、尾煤理論產(chǎn)率及其灰分。3、分選的邊界灰分。4、根據(jù)密度±0.1kg/L含量判斷該原煤的可選性〔設(shè)+0.5mm原煤中密度高于2.0kg/L的物料產(chǎn)率為19.09%。密度δ,kg/L100100807090605040302010010010090908080707060605050404030302020101000βθδλε浮物產(chǎn)率γβ%沉物產(chǎn)率γθ%1.31.41.51.61.71.81.92.02.1灰分,%答：經(jīng)作圖,求得1、精煤理論產(chǎn)率為80%,理論分選密度為1.57kg/L,分選密度±0.1kg/L含量為19.0%。2、尾煤理論產(chǎn)率為20%,尾煤灰分為52%。3、邊界灰分為26%。4、因理論分選密度為1.57kg/L,小于1.7kg/L,依據(jù)國(guó)標(biāo)規(guī)定,以扣除沉矸〔密度大于2.0kg/L后的量作為100%來計(jì)算δ±0.1含量,即以γδ±0.1〔去矸的量來作為評(píng)定煤炭可選性的依據(jù)。故γδ±0.1〔去矸=γδ±0.1〔不去矸×100%/〔100%-γ＞2.0=19.0%×100%/〔100%-19.09%=23.5%根據(jù)中國(guó)煤炭可選性等級(jí)劃分標(biāo)準(zhǔn)可知,該原煤可選性等級(jí)為較難選。.表1350～0.5mm密度級(jí)/kg·L-1原煤矸石δp=1.90中煤δp=1.45〔δi=1.5精煤Γ%Ad％ε％Γ%Ad％Γ%ε％Γ%Ad％Γ%Ad％122=表12第4列；3=表12第5列；計(jì)算時(shí)設(shè)定各密度級(jí)灰分不變；根據(jù)近似公式計(jì)算出t值,由t-F〔t表查出分配率ε2=表12第4列；3=表12第5列；計(jì)算時(shí)設(shè)定各密度級(jí)灰分不變；根據(jù)近似公式計(jì)算出t值,由t-F〔t表查出分配率ε；5=2×4；7=2-5；8同4；11=7-9；7為中煤的入料3456789101112＜1.326.164.43004.4326.160.120.034.4326.134.431.3～1.438.598.480.010.0048.4838.5917.316.688.4831.918.481.4～1.59.0118.780.470.0418.788.9750.004.4918.784.4818.781.5～1.62.6729.883.250.0929.882.5877.402.0029.880.5829.881.6～1.71.8639.3011.120.2139.301.6591.601.5139.300.1439.301.7～1.80.9546.1224.730.2346.060.7295.760.6946.060.0346.061.8～2.01.6756.3150.000.8456.310.8399.530.8356.31056.31＞2.019.0987.2182.0915.6787.213.4299.873.4287.21087.21小計(jì)100.0025.6717.0884.0982.9219.6532.4263.277.82δp為實(shí)際分選密度,它與可選性曲線上查得的理論分選密度δi可以參考以下指標(biāo)選用：中煤段：δp=δi-〔0.05～0.1δp＜δi；矸石段：δp=δi+〔0.1～0.2δp＞δi；根據(jù)跳汰選I值參考表選取I=0.18。近似公式t=〔1.553lg〔〔δe-1/〔δp-1/I其中,t—分配指標(biāo)轉(zhuǎn)換值,I—不完善度,δe—某密度級(jí)的平均密度〔其中,-1.3密度級(jí)的δe值取1.2,+2.0密度級(jí)的δe值在計(jì)算矸石段時(shí)取2.15～2.25,計(jì)算中煤段時(shí)取2.1～2.2。.表1450～0.5mm入選原煤理論與實(shí)際指標(biāo)對(duì)比表指標(biāo)產(chǎn)品理論指標(biāo)理論指標(biāo)理論指標(biāo)由表13第2、3列計(jì)算；實(shí)際指標(biāo)由表13各產(chǎn)品計(jì)算。理論指標(biāo)由表13第2、3列計(jì)算；實(shí)際指標(biāo)由表13各產(chǎn)品計(jì)算。實(shí)際指標(biāo)δi=1.5δi=1.4δp=1.45〔對(duì)應(yīng)δi=1.5Γ％Ａｄ％Γ％Ａｄ％Γ％Ａｄ％1234567精煤73.7673.76=26.16+38.59+9.01；5.48=2.67+1.86+0.95；20.76=1.67+19.0973.76=26.16+38.59+9.01；5.48=2.67+1.86+0.95；20.76=1.67+19.0964.75=26.16+38.5914.19=9.01+2.67+1.86+0.9520.76=1.67+19.0963.27=表13第11列19.65=表13第9列17.08=表13第5列7.82=表13第12列32.42=表13第10列84.09=表13第6列3、5加權(quán)8.3064.756.8463.277.82中煤5.4835.8814.4925.2519.6532.42矸石20.7684.7220.7684.7217.0884.09合計(jì)100.0025.67100.0025.67100.0025.67理論分選密度δi1＝1.80δi2＝1.50實(shí)際分選密度δp1＝1.90δp2＝1.45中煤段：δp=δi-〔0.05～0.1δp＜δi；矸石段：δp=δi+〔0.1～0.2δp＞δi；表15主洗預(yù)測(cè)產(chǎn)品實(shí)際平衡表產(chǎn)品名稱產(chǎn)率灰分Ad％占本級(jí)Γ％表13第5、9、11列；3=2×85.962；4=表13第6、10、12列；表13第5、9、11列；3=2×85.962；4=表13第6、10、12列；

占全樣γ％1234精煤63.2754.3887.82中煤19.6516.89232.42矸石17.0814.68284.09小計(jì)100.0085.962首先確定總計(jì)占全樣的量94.019=表6中100-5.981或者表9第9列,意義為不包括原生煤泥的入洗量；2.416=2.57×94.019；5.641=6首先確定總計(jì)占全樣的量94.019=表6中100-5.981或者表9第9列,意義為不包括原生煤泥的入洗量；2.416=2.57×94.019；5.641=6×91.43=100-6-2.57總計(jì)灰分25.83與表12第5列總計(jì)灰分相同。25.67小計(jì)占總計(jì)91.43//次生煤泥6次生煤泥根據(jù)106頁表4-8次生煤泥百分率表選?。槐?中原煤中-0.5mm級(jí)量為5.236%,小于10%,而且原煤牌號(hào)為1/3焦煤,故取6,灰分與小計(jì)灰分相同。次生煤泥根據(jù)106頁表4-8次生煤泥百分率表選?。槐?中原煤中-0.5mm級(jí)量為5.236%,小于10%,而且原煤牌號(hào)為1/3焦煤,故取6,灰分與小計(jì)灰分相同。5.64125.67浮沉煤泥2.572.41631.90總計(jì)100.0094.01925.83.表16再洗產(chǎn)品實(shí)際產(chǎn)率及灰分計(jì)算<I=0.20>密度級(jí)/kg·L-1再洗入料占全樣16.892%〔表15占全樣16.892%〔表15矸石δp=1.70中煤δp=1.50精煤Γ%設(shè)定各密度級(jí)灰分不變2=以中煤為100%計(jì)算占本級(jí)的量,表13中第9列各密度級(jí)本級(jí)量除以19.65%而來。3、6、10、12=表13第10列設(shè)定各密度級(jí)灰分不變2=以中煤為100%計(jì)算占本級(jí)的量,表13中第9列各密度級(jí)本級(jí)量除以19.65%而來。3、6、10、12=表13第10列小計(jì)加權(quán)4=近似公式法計(jì)算而來5=2×47=2-59=7×811=7-9Ad％ε％Γ%Ad％Γ%ε％Γ%Ad％Γ%Ad％123456789101112＜1.30.154.43004.430.150.1004.430.154.431.3～1.434.008.480.970.338.4833.6711.453.868.4829.818.481.4～1.522.8518.786.811.5618.7821.2936.137.6918.7813.6018.781.5～1.610.1829.8820.822.1229.888.0662.595.0429.883.0229.881.6～1.77.6939.3040.133.0939.304.6081.203.7439.300.8639.301.7～1.83.5146.0659.222.0846.061.4391.421.3146.060.1246.061.8～2.04.2256.3180.173.3856.310.8497.620.8256.310.0256.31＞2.017.4087.2195.2916.5887.210.8299.610.8287.21087.21小計(jì)100.0032.4229.1466.8870.8623.2828.0447.5813.44近似公式法計(jì)算.表17再洗預(yù)測(cè)產(chǎn)品實(shí)際平衡表產(chǎn)品名稱產(chǎn)率47.58=表16第11列23.28=表16第9列29.14=表16第5列次生煤泥選取與主洗同47.58=表16第11列23.28=表16第9列29.14=表16第5列次生煤泥選取與主洗同總計(jì)16.892=表15主洗中煤占全樣1.014=6×16.8923=2×15.87813.44=表16第12列28.04=表16第10列66.88=表16第6列灰分Ad％占本級(jí)Γ％占全樣