矿业公司选矿厂流程考察报告

PAGEPAGE3矿业公司选矿厂流程考察报告一、前言4万t/a50%，8%50t/a40为进一步掌握工艺流程的生产情况，优化工艺流程，提高选矿技术指标提供7350t/a本次流程考察获得综合指标见表1，数质量流程图见图1。指标产量品位%回收率%指标产量品位%回收率%产率%产品吨/时万吨/年TFeSiO2TFeSiO2球团精39.3743.3132.2262.197.8567.6850%品级精15.3316.8612.5446.9416.8719.8340%品级精3.303.632.7031.2828.132.85尾矿42.0046.2034.378.499.64原矿100.00110.0081.8336.28100.00注：每年工作天数按310天计算，作业率为85%。二、流程考察1、考察时间及取样点的布置738：00～16：008（包括5003斜板的溢流，共计31302、考察结果对考察样进行浓度、细度、铁品位、磁性铁测定，测定结果见表2，流程图见图1。编流程考察结果表2细度号名称 浓度TFe（%）mFe（%）（-0.045mm）1自磨机排矿 85.7535.842自磨机返矿 98.8531.633一段弱磁给矿（原矿） 43.1336.2819.544一段弱磁精矿 69.8051.085一段弱磁尾矿 27.9323.166圆筒筛筛下 28.1823.757圆筒筛筛上 10.2620.138一段强磁精矿 30.2637.779一段强磁尾矿 23.169.9010二段Φ350溢流 6.6538.7495.3811二段Φ350沉砂 72.5854.2633.6612AΦ2.7×3.6m磨机排矿 72.5554.8635.4012BΦ2.1×2.8m磨机排矿 75.5564.0919.7613AΦ2.7×3.6m磨机的旋流器组溢流 17.8139.6474.83续表：编细度名称浓度（%）TFe（%）mFe（%）号（-0.045mm）13BΦ2.1×2.8m磨机的旋流器组溢流28.2054.4248.7314Φ3.2×5.4m磨机排矿66.8854.0437.5515AΦ2.7×3.6m磨机的旋流器组沉砂68.6654.6134.2315BΦ2.1×2.8m磨机的旋流器组沉砂83.4065.6818.5116二段弱磁精矿35.6665.3517Φ24m浓缩池给矿7.2428.5718Φ24m浓缩池底流23.7128.311.92195#强磁精矿32.0843.503.40205#强磁尾矿11.758.84214#强磁精矿（50%品级精矿）30.1846.94224#强磁尾矿7.2819.9423摇床给矿10.9410.4724摇床精矿6.1741.53256#强磁给矿8.839.75266#强磁精矿8.5628.89276#强磁尾矿7.866.902840%品级精矿38.5631.7229总尾41.978.7530总精34.5862.1931500m2斜板溢流0.8729.85初步分析：Φ350×834#弱磁机的回收率偏低；②摇床给矿浓度仅为11%，偏低（细砂给矿浓度为1525，会降低摇床的生产率，使细粒精矿损失于尾矿。从细度看，①Φ2.1×2.8mΦ350×3）仅在49%左右，较粗，比生产中指标的74%－32525Φ350×8细度（－325）95%左右，过细，在弱磁选别时造成机械夹带，精矿品位降低。62在6450（偏低40%品级精矿品位也偏低，仅308%左右，达到预期目标。5360%低3%三、数质量流程及矿浆流程1、主要技术指标数质量流程计算结果见图1，主要技术指标见表见表3。流程考察主要指标表 表3球团精39.3743.3132.2262.197.8567.6850%品级精15.3316.8612.5446.9416.8719.8340%品级精3.303.632.7031.2828.132.85尾矿42.0046.2034.378.499.64原矿100.00110.0081.8336.28100.00指标产量指标产量品位%回收率%产率%产品名称吨/时万吨/年TFeSiO2TFeSiO2（1）原矿性质研究可知，矿石中铁的主要矿物为磁铁矿和赤铁矿，其53.85％，从数质量流程计算可知二段弱磁精矿的铁回30.36%，（2）40%品级精矿品位在30%左右，没有达到预期目标。（3）82、矿浆流程矿浆流程计算结果见图1，补加水主要技术指标见表4。（吨/总循环水补加水主要技术指标补加清水 回水率4单位耗水时）（吨/时）（吨/时） （%）（吨·水/吨·矿）953.72781.84171.88 81.988.67考察期间总水耗为953.72m/h,回水量为781.84m/81.98171.88m3/h。四、产品分析主要对部分产品全元素分析及粒度分析。荧光分析对原矿、精矿、尾矿、50%品级精矿、40%品级精矿、一段弱磁尾矿进行荧光分析，结果见表5。含一段弱磁50%品级40%品级元量原矿精矿含一段弱磁50%品级40%品级元量原矿精矿尾矿素Fe36.2862.198.85尾矿23.16精矿46.94精矿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粒度分析对原矿、精矿、尾矿、50%品级精矿、40%品级精矿、Φ24m浓缩池底流进行粒度分析，结果见表6、表7。产品粒度分析 表6粒级(mm)产率原矿品位金属回产率精矿品位金属回产率尾矿品位金属回收%%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）所分析原矿为自磨机筛下产品，总体粒度较粗，+0.2mm产率占40%以上。原矿粒度越粗，则一段强磁抛尾量越小。（2）尾矿中金属流失主要在粒度较粗及较细的两端，且两端粒级品位均较高，生产上通过改善磨矿作业，减少过磨及跑粗，对降低尾矿品位是非常有利的。（3）40%品级精矿粒度较粗，连生体较多，各粒级品位最高仅在40%左右，表明不磨矿条件难以处理。产品粒度分析 表7Φ24m浓缩池底流50%品级精矿40%品级精矿粒级(mm)产率品位金属产率品位金属率%产率品位金属率%%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、结论62.1950%4#50二段旋流器组Φ350×8建议摇床生产50%品级精矿，一方面可尽量早拿产品，避免再处理500m2改善生产指标有积极作用。上应经常检查各磨机处理矿量是否合适，注意矿量的均衡。总水量:953.72t/h环水量：781.84t/h

产率（%）品位（%）回收率矿量（t/h）浓度（%）水量

100.00110.00

36.2899.30

原矿100.000.77Ф5.5X1.8m半自磨机一台124.9827.78

-5mm100.0036.28100.00110.0043.13145.04一次弱磁

110.45121.50

35.8485.75

109.1120.19直线振动筛1台

10.4511.50

31.6398.85

9.110.1357.03

XCTB1024弱磁选机1台 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

圆筒筛2台20.134.7910.26

44.3748.81

23.7528.18

29.05124.4022.0524.26

37.7730.26

22.9655.91

Slon-1500强磁机3台 22.3224.55

9.9023.16

6.0981.4538.746.65 3#、4#弱磁选机 Ф3.2X5.4m球磨机1台538.58二次弱磁Ф2.1X2.8m球磨4