礦業(yè)公司選礦廠流程考察報(bào)告

PAGEPAGE3礦業(yè)公司選礦廠流程考察報(bào)告一、前言4萬(wàn)t/a50%，8%50t/a40為進(jìn)一步掌握工藝流程的生產(chǎn)情況，優(yōu)化工藝流程，提高選礦技術(shù)指標(biāo)提供7350t/a本次流程考察獲得綜合指標(biāo)見(jiàn)表1，數(shù)質(zhì)量流程圖見(jiàn)圖1。指標(biāo)產(chǎn)量品位%回收率%指標(biāo)產(chǎn)量品位%回收率%產(chǎn)率%產(chǎn)品噸/時(shí)萬(wàn)噸/年TFeSiO2TFeSiO2球團(tuán)精39.3743.3132.2262.197.8567.6850%品級(jí)精15.3316.8612.5446.9416.8719.8340%品級(jí)精3.303.632.7031.2828.132.85尾礦42.0046.2034.378.499.64原礦100.00110.0081.8336.28100.00注：每年工作天數(shù)按310天計(jì)算，作業(yè)率為85%。二、流程考察1、考察時(shí)間及取樣點(diǎn)的布置738：00～16：008（包括5003斜板的溢流，共計(jì)31302、考察結(jié)果對(duì)考察樣進(jìn)行濃度、細(xì)度、鐵品位、磁性鐵測(cè)定，測(cè)定結(jié)果見(jiàn)表2，流程圖見(jiàn)圖1。編流程考察結(jié)果表2細(xì)度號(hào)名稱 濃度TFe（%）mFe（%）（-0.045mm）1自磨機(jī)排礦 85.7535.842自磨機(jī)返礦 98.8531.633一段弱磁給礦（原礦） 43.1336.2819.544一段弱磁精礦 69.8051.085一段弱磁尾礦 27.9323.166圓筒篩篩下 28.1823.757圓筒篩篩上 10.2620.138一段強(qiáng)磁精礦 30.2637.779一段強(qiáng)磁尾礦 23.169.9010二段Φ350溢流 6.6538.7495.3811二段Φ350沉砂 72.5854.2633.6612AΦ2.7×3.6m磨機(jī)排礦 72.5554.8635.4012BΦ2.1×2.8m磨機(jī)排礦 75.5564.0919.7613AΦ2.7×3.6m磨機(jī)的旋流器組溢流 17.8139.6474.83續(xù)表：編細(xì)度名稱濃度（%）TFe（%）mFe（%）號(hào)（-0.045mm）13BΦ2.1×2.8m磨機(jī)的旋流器組溢流28.2054.4248.7314Φ3.2×5.4m磨機(jī)排礦66.8854.0437.5515AΦ2.7×3.6m磨機(jī)的旋流器組沉砂68.6654.6134.2315BΦ2.1×2.8m磨機(jī)的旋流器組沉砂83.4065.6818.5116二段弱磁精礦35.6665.3517Φ24m濃縮池給礦7.2428.5718Φ24m濃縮池底流23.7128.311.92195#強(qiáng)磁精礦32.0843.503.40205#強(qiáng)磁尾礦11.758.84214#強(qiáng)磁精礦（50%品級(jí)精礦）30.1846.94224#強(qiáng)磁尾礦7.2819.9423搖床給礦10.9410.4724搖床精礦6.1741.53256#強(qiáng)磁給礦8.839.75266#強(qiáng)磁精礦8.5628.89276#強(qiáng)磁尾礦7.866.902840%品級(jí)精礦38.5631.7229總尾41.978.7530總精34.5862.1931500m2斜板溢流0.8729.85初步分析：Φ350×834#弱磁機(jī)的回收率偏低；②搖床給礦濃度僅為11%，偏低（細(xì)砂給礦濃度為1525，會(huì)降低搖床的生產(chǎn)率，使細(xì)粒精礦損失于尾礦。從細(xì)度看，①Φ2.1×2.8mΦ350×3）僅在49%左右，較粗，比生產(chǎn)中指標(biāo)的74%－32525Φ350×8細(xì)度（－325）95%左右，過(guò)細(xì)，在弱磁選別時(shí)造成機(jī)械夾帶，精礦品位降低。62在6450（偏低40%品級(jí)精礦品位也偏低，僅308%左右，達(dá)到預(yù)期目標(biāo)。5360%低3%三、數(shù)質(zhì)量流程及礦漿流程1、主要技術(shù)指標(biāo)數(shù)質(zhì)量流程計(jì)算結(jié)果見(jiàn)圖1，主要技術(shù)指標(biāo)見(jiàn)表見(jiàn)表3。流程考察主要指標(biāo)表 表3球團(tuán)精39.3743.3132.2262.197.8567.6850%品級(jí)精15.3316.8612.5446.9416.8719.8340%品級(jí)精3.303.632.7031.2828.132.85尾礦42.0046.2034.378.499.64原礦100.00110.0081.8336.28100.00指標(biāo)產(chǎn)量指標(biāo)產(chǎn)量品位%回收率%產(chǎn)率%產(chǎn)品名稱噸/時(shí)萬(wàn)噸/年TFeSiO2TFeSiO2（1）原礦性質(zhì)研究可知，礦石中鐵的主要礦物為磁鐵礦和赤鐵礦，其53.85％，從數(shù)質(zhì)量流程計(jì)算可知二段弱磁精礦的鐵回30.36%，（2）40%品級(jí)精礦品位在30%左右，沒(méi)有達(dá)到預(yù)期目標(biāo)。（3）82、礦漿流程礦漿流程計(jì)算結(jié)果見(jiàn)圖1，補(bǔ)加水主要技術(shù)指標(biāo)見(jiàn)表4。（噸/總循環(huán)水補(bǔ)加水主要技術(shù)指標(biāo)補(bǔ)加清水 回水率4單位耗水時(shí)）（噸/時(shí)）（噸/時(shí)） （%）（噸·水/噸·礦）953.72781.84171.88 81.988.67考察期間總水耗為953.72m/h,回水量為781.84m/81.98171.88m3/h。四、產(chǎn)品分析主要對(duì)部分產(chǎn)品全元素分析及粒度分析。熒光分析對(duì)原礦、精礦、尾礦、50%品級(jí)精礦、40%品級(jí)精礦、一段弱磁尾礦進(jìn)行熒光分析，結(jié)果見(jiàn)表5。含一段弱磁50%品級(jí)40%品級(jí)元量原礦精礦含一段弱磁50%品級(jí)40%品級(jí)元量原礦精礦尾礦素Fe36.2862.198.85尾礦23.16精礦46.94精礦31.28SiO42.047.5057.3250.6422.5637.222CaO2.470.713.953.782.433.51MgO2.211.141.852.703.793.49AlO9.712.9812.2112.167.3410.4323Mn0.0510.0070.0720.0900.0990.131P0.2420.0280.440.3140.0470.179S0.0300.0040.0430.0350.0210.044TiO0.980.860.711.232.591.952KO0.860.171.321.320.451.052NaO2.460.603.372.790.991.782Pb＜0.002＜0.002＜0.002＜0.002＜0.002＜0.002Zn＜0.002＜0.002＜0.002＜0.002＜0.002＜0.002Cu＜0.002＜0.002＜0.002＜0.002＜0.002＜0.002Sn＜0.002＜0.002＜0.002＜0.002＜0.002＜0.002粒度分析對(duì)原礦、精礦、尾礦、50%品級(jí)精礦、40%品級(jí)精礦、Φ24m濃縮池底流進(jìn)行粒度分析，結(jié)果見(jiàn)表6、表7。產(chǎn)品粒度分析 表6粒級(jí)(mm)產(chǎn)率原礦品位金屬回產(chǎn)率精礦品位金屬回產(chǎn)率尾礦品位金屬回收%%收率%%%收率%%%率%+0.241.7635.9740.840.5621.8512.6831.33-0.2+0.1544.7643.445.620.3636.941.802.599.582.80-0.154+0.1059.9245.8912.382.115.918.225.50-0.105+0.0748.4742.609.815.7549.134.547.175.984.85-0.074+0.0459.2139.139.8013.4655.7212.0812.354.486.26-0.045+0.03711.0143.6113.0667.2468.9474.5913.665.919.13-0.037+0.01912.3522.247.466.9043.564.8426.608.0724.27-0.019+0.0101.3914.920.651.8141.281.205.8212.878.47-0.010+0.005-0.0050.380.5514.6515.140.150.230.691.1232.580.951.662.3814.8617.142.794.60Σ100.0036.78100.00100.0062.14100.00100.008.84100.00分析如下：（1）所分析原礦為自磨機(jī)篩下產(chǎn)品，總體粒度較粗，+0.2mm產(chǎn)率占40%以上。原礦粒度越粗，則一段強(qiáng)磁拋尾量越小。（2）尾礦中金屬流失主要在粒度較粗及較細(xì)的兩端，且兩端粒級(jí)品位均較高，生產(chǎn)上通過(guò)改善磨礦作業(yè)，減少過(guò)磨及跑粗，對(duì)降低尾礦品位是非常有利的。（3）40%品級(jí)精礦粒度較粗，連生體較多，各粒級(jí)品位最高僅在40%左右，表明不磨礦條件難以處理。產(chǎn)品粒度分析 表7Φ24m濃縮池底流50%品級(jí)精礦40%品級(jí)精礦粒級(jí)(mm)產(chǎn)率品位金屬產(chǎn)率品位金屬率%產(chǎn)率品位金屬率%%率%%%%%%+0.2-0.2+0.1540.490.4711.640.390.380.2620.881.101.000.8111.300.66-0.154+0.1052.7313.621.321.824.4213.271.88-0.105+0.0747.1917.144.375.4128.623.329.6917.525.46-0.074+0.04517.8021.9713.8816.4041.7014.6519.9123.9315.32-0.045+0.03726.0843.6040.368.1462.3210.8728.4643.8040.08-0.037+0.01937.4225.1633.4235.9650.5238.9228.5232.2829.61-0.019+0.0105.5122.194.3425.6547.6626.195.2330.545.13-0.010+0.005-0.0050.561.7523.171.911.854.1241.9437.261.663.290.491.4729.511.86Σ100.0028.17100.00100.0046.68100.00100.0031.10100.00五、結(jié)論62.1950%4#50二段旋流器組Φ350×8建議搖床生產(chǎn)50%品級(jí)精礦，一方面可盡量早拿產(chǎn)品，避免再處理500m2改善生產(chǎn)指標(biāo)有積極作用。上應(yīng)經(jīng)常檢查各磨機(jī)處理礦量是否合適，注意礦量的均衡?？偹?953.72t/h環(huán)水量：781.84t/h

產(chǎn)率（%）品位（%）回收率礦量（t/h）濃度（%）水量

100.00110.00

36.2899.30

原礦100.000.77Ф5.5X1.8m半自磨機(jī)一臺(tái)124.9827.78

-5mm100.0036.28100.00110.0043.13145.04一次弱磁

110.45121.50

35.8485.75

109.1120.19直線振動(dòng)篩1臺(tái)

10.4511.50

31.6398.85

9.110.1357.03

XCTB1024弱磁選機(jī)1臺(tái) 53.0146.9951.0846.9951.0866.1651.6969.8022.3655.6346.2770.9561.1936.72105.4577.6843.8693.9185.4534.62161.37隔 粗

23.1627.93

33.84150.4612.96

8.649.50

圓筒篩2臺(tái)20.134.7910.26

44.3748.81

23.7528.18

29.05124.4022.0524.26

37.7730.26

22.9655.91

Slon-1500強(qiáng)磁機(jī)3臺(tái) 22.3224.55

9.9023.16

6.0981.4538.746.65 3#、4#弱磁選機(jī) Ф3.2X5.4m球磨機(jī)1臺(tái)538.58二次弱磁Ф2.1X2.8m球磨4