丁家山铅锌矿选矿试验报告

1粒级〔mm〕磁黄铁矿含量〔%粒级〔mm〕磁黄铁矿含量〔%〕 〔%〕闪锌矿含量〔%〕 计〔%〕方铅矿含量〔%〕 累计〔2—1.6511.131.131.651—1.1683.564.691.168—0.8336.1710.860.833—0.58911.8922.753.103.100.589—0.4178.3831.133.116.210.417—0.29510.5441.674.3910.604.804.800.295—0.2087.7449.4112.2922.893.458.250.208—0.1477.9157.329.7132.64.8013.050.147—0.10411.1968.5113.2045.88.4021.450.104—0.0748.8977.411.0756.8710.2031.650.074—0.04311.0988.4919.4976.3618.7850.430.043—0.0207.1195.616.5892.9428.0178.440.020—0.0151.8297.423.7196.6511.9290.360.015—0.0101.9899.402.2598.907.6097.96<0.0100.06100.001.10100.002.04100.00粒级>0.341.6710.604.80.3—0.07435.7346.2726.85细粒0.074—0.0122.0042.0366.31微细粒<0.010.061.102.04228、小结丁家山铅锌矿为原生多金属硫化矿，金属矿物主要有磁黄铁矿，闪锌绿泥石、透闪石、阳起石。有价元素主要为锌、铅。铜、铋、银可考虑综合回收。方铅矿闪锌矿矿石闪锌矿矿石闪锌矿磁黄铁矿矿石方铅矿闪锌矿黄铜矿黄铁矿矿石36%73.20.%。磁黄铁矿占有确定的主体地位。因此，本次实行的试验样品应为闪锌矿磁黄铁矿类型矿石。本样品有用矿物嵌布关系简洁，嵌布粒度粗细不均，而以中细粒为主68.35%。90.86%的磨矿段数及适宜的磨矿粒度。一切特征。物彼此共生嵌布错综简洁。磁黄铁矿本身含有Cu0.05%。足以活化磁黄铁矿，使磁黄铁矿具有良好的浮游性。因此，本矿样实为铁闪锌矿与磁黄铁矿的分别问题。福建省尤溪金东矿业已建成200t/d的采选联合企业。选矿厂承受两段一闭路的裂开流程。一段磨矿，磨矿细度为65%—0.074mm。浮选承受优先浮选流程，铅浮选为一粗二扫四精的选别流程，锌浮选为一粗二扫三精的选别流程。承受的浮选药剂：石灰、丁铵黑药、乙硫氮、丁黄药、硫酸锌、硫酸铜、2号油。选矿最终产品为铅精矿，锌精矿和尾矿。硫化铁未回收，随尾矿一同排至尾矿坝。试验的宗旨是在现场生产的现有流程根底上，最好是保持磨矿细度在65%—0.074mm可能到达的选别结果，并争取到达良好的选别效果。因此，首先在现场粗磨的65%—0.074mm的磨矿粒度进展试验。预选试验12787的结果可看出选别结果较好，铅、锌回收率在80%以上，从表8结果看出铅精矿品位可达50%，但回收率较低。铅锌矿经两次精选品位28.91%，可见提高锌精矿品位是试验的重点和难点。铅、锌精矿中含铜分别为0.57%和0.33%，这样就不必为铅、锌精矿中铜杂质含量超标而担忧了。产品名称〔%〕〔%〕〔%〕产品名称〔%〕〔%〕〔%〕PbZnPbZn铅精矿8.1014.848.4182.3510.01锌精矿25.710.5921.6610.3981.82尾 矿66.190.160.847.268.17原 矿100.001.466.81100.00100.00产品名称〔%〕品位 〔%〕〔%〕表8 开产品名称〔%〕品位 〔%〕〔%〕CuPbZnCuPbZn铅精矿1.660.5750.278.085.8656.592.1315.400.407.378.1013.3826.996.9424.360.871.916.2823.505.654.34铅精矿11.530.330.3328.9123.572.5852.87314.330.200.2311.8217.762.2426.86尾矿62.720.0410.140.6915.935.596.86原矿100.000.1611.4756.305100.00100.00100.00高碱流程方案的试验PH13以下进展铅与锌硫分别，它是处理含硫高的铅锌矿石，得到有效分选的流程方案之一。本样品含硫18.35%，已属高硫矿石。试验流程如图3。试验结果见表9。高碱流程可获得50.07%70.32%。但药剂消耗过多。因此，暂不考虑。产品名称产率〔%〕产品名称产率〔%〕〔%〕〔%〕PbZnPbZn铅精矿2.1250.078.5370.322.55中矿3.945.6511.7014.756.50尾矿93.940.246.8714.9390.95原矿100.001.517.095100.00100.00选石灰用量试验410500—1000g/t为宜。表10 石灰用量试验结果PbZnPbZn铅精矿16.608.584.8387.6810.96尾 矿83.400.247.8112.3289.04原 矿100.001.627.32100.00100.00铅精矿8.1014.848.4182.3510.32尾 矿91.900.346.4417.6589.68原 矿100.001.466.60100.00100.00铅精矿4.0226.197.5175.815.14尾 矿95.980.355.8024.1994.86原 矿100.001.395.87100.00100.00品位品位回收 率石灰用量产率产品名称(g/t)〔%〕〔%〕〔%〕0PH7.5500PH8.51000PH9.07.4%4.75%。考虑到工艺的简化和削减本钱，暂不用腐植酸钠。品位回收 率用量产率产品名称(g/t)〔%〕〔%〕〔%〕表品位回收 率用量产率产品名称(g/t)〔%〕〔%〕〔%〕PbZnPbZn铅精矿11.4211.527.4089.1913.410尾矿88.580.186.1510.8186.59原矿100.001.4756.035100.00100.00铅精矿18.997.143.3292.799.39100尾 矿81.010.137.517.2186.59原 矿100.001.4616.714100.00100.00铅精矿12.1210.324.7585.578.40200尾 矿87.880.247.1414.4391.60原 矿100.001.4626.85100.00100.00捕收剂及起泡剂种类试验试验流程如图612。从试验结果看出，承受乙硫氨或黄药与丁黄药联合使用均效果较好，为削减打算选用丁黄药与乙黄药联合使用。承受BK—204药剂为起泡剂时，可获得高质量的铅精矿，具有良好的选择性。BK—204药剂为起泡剂。8药剂种类及用量品位产品名称〔g/t〕产率〔%〕铅锌矿乙黄药6030尾矿2号油原矿乙黄药2525302020药剂种类及用量品位产品名称〔g/t〕产率〔%〕铅锌矿乙黄药6030尾矿2号油原矿乙黄药252530202030铅锌矿丁黄药尾矿2号油乙硫氮原矿铅锌矿乙黄药尾矿2号油原矿7.1192.89100.0011.6388.37100.0015.2384.77100.00Pb16.200.301.4310.680.191.418.880.191.51〔%〕Zn7.596.076.176.386.236.254.846.145.94乙硫氮302号油30丁黄药50BK—20440铅锌矿12.9810.114.96尾矿87.020.185.86原矿100.001.475.74铅锌矿6.8517.027.11尾矿93.150.245.94原矿100.001.396.029铅粗选石灰及硫酸铜用量试验713及表144000g/t硫酸铜用量以300g/t为宜。石灰用量产率品位作业回收率产品名称〔g/t〕3000PH10.54000PH11.56000PH石灰用量产率品位作业回收率产品名称〔g/t〕3000PH10.54000PH11.56000PH13.0〔%〕Zn〔%〕Zn〔%〕锌精矿29.1119.4492.04尾矿70.890.697.96给矿100.006.15100.00锌精矿19.2227.7983.89尾矿80.781.2716.11给矿100.006.37100.00锌精矿12.7330.3364.08尾矿87.272.4835.92给矿100.006.03100.001010石灰用量产率品位石灰用量产率品位作业回收率产品名称〔g/t〕锌精矿〔%〕13.95Zn〔%〕32.24Zn〔%〕75.68250尾矿86.051.6824.32给矿100.005.94100.00锌精矿19.2227.7983.89300尾矿80.781.2716.11给矿100.006.37100.00锌精矿27.9721.6690.92400尾矿72.030.849.08给矿100.006.66100.00选锌试验89。试验结果见表1516。相对之下，图916获得BK—204药剂具有很好的选别效果。9的工艺流程。表15 2号油为起泡剂的选锌试验结果产率品位〔%〕〔%〕产品名称〔%〕PbZnPbZn铅精矿15.876.985.3986.1613.77锌精矿10.130.3738.262.9262.3812.150.5019.850.846.8723.890.284.900.853.0736.550.223.161.123.33尾矿61.410.171.078.1113.91原矿100.001.2866.213100.00100.00产率〔%〕〔%产率〔%〕〔%〕产品名称〔%〕PbZnPbZn铅精矿6.8517.027.1183.558.09锌精矿8.660.5644.433.6063.9011.010.6717.590.482.9523.320.374.900.882.70尾矿80.160.201.6811.4922.36原矿100.001.3956.022100.00100.00闭路试验65%—0.074mm，浮选流程构造与现场完全一样，只适当调整完善一些药剂条件进展闭路试验，试验流程如图10。获得的闭路试验指标见表17。该指标不佳，其缘由在于：其一磨矿细度不够。从原矿的物质组成争论已说明65%—0.074mm的磨矿粒度是不能够使有用矿物到达充分单体解离，应适当增加磨矿细度。目前选矿厂是承受一段磨矿，假设增加磨矿细度必需两段磨矿，即增加磨矿的投资和选矿本钱，对小选矿厂是不适宜的。这样，在磨7.5~10.59%闪锌矿对石灰敏感，易于被石灰抑制，难于活化；由于含铁具有硫化铁一些特征，而与硫化铁矿物可浮性相近。这些促使铁闪锌矿与磁黄铁矿难于分选。其三，是磁黄铁验工作中应当得到留意和解决。表17 生产流程闭路试验指标产品名称产率〔%〕Pb〔%〕Zn SA〔g/〕Pb〔%〕Zn SAg铅锌矿2.3941.176.73 24.23107666.632.44 2.9727.77锌精矿12.272.0240.80 32.4220217.2978.32 20.9927.57尾矿85.410.271.4416.874716.0819.2476.0444.66原矿100.001.436.3918.9589.9100.00100.00100.00100.00五.粗精矿再磨流程方案的试验铅粗精矿再磨试验1118。铅粗精矿再磨后，铅的选别指标有明显地提高。应承受铅粗精矿再磨工艺。铅粗精矿再磨工艺的局部闭路试验铅粗精矿再磨后有明显的效果，故进展闭路试验，试验流程如图12。闭路试验41.17%61.63%63.63%77.23%。6.73%3.23%。可见铅粗精矿再磨是提高铅精矿品位降低精矿中杂质及提高铅回收率的必由之路。85表18 铅粗精矿再磨比照试验结果85再磨细度产品名产率品位〔%〕回收率〔%〕%—0.043mm称〔%〕Pb ZnPb Zn铅精矿1.8343.16 8.5756.01 2.6065中矿7.114.376.1322.037.23〔不再磨〕尾矿91.060.345.9721.9690.17原矿100.001.416.03100.00100.00铅精矿1.2156.913.3552.120.63中 矿4.836.298.4922.996.41尾 矿93.960.356.3324.8992.96原 矿100.001.326.40100.00100.00表19 铅粗精矿再磨闭路试验结果产品产品产 率品名称铅精矿〔%〕1.89Pb位〔%〕Zn〔%〕PbZn61.633.2377.230.99尾矿98.110.356.2422.7799.01原矿100.001.506.18100.00100.00铅粗精矿再磨试验5%的锌品1%75%—0.043mm为宜。表20 锌粗精矿再磨细度试验结果再磨细度产品产 率品 位回收率〔%—0.043mm〕名称〔%〕Zn〔%〕Zn〔%〕铅精矿9.995.539.54锌精矿8.1943.4061.3613.6024.8815.4662〔不再磨〕23.309.785.5733.802.581.69尾矿71.120.526.38原矿100.005.80100.00铅精矿6.387.187.22锌精矿6.2848.9648.4912.3932.2112.147022.7918.498.1434.997.465.87尾矿77.171.4918.14原矿100.006.34100.00铅精矿11.165.569.91锌精矿8.1748.0662.7111.8931.379.477522.4917.016.7635.384.533.89尾矿70.910.647.26原矿100.006.26100.00粗精矿再磨闭路试验142115。21果产率〔%〕Pb〔%〕Zn SPb〔%〕Zn SAg铅精矿1.8364.523.47 17.99161674.951.02 1.7934.52锌精矿12.630.8941.51 32.54124.47.1484.38 22.3918.34尾矿85.540.331.0616.2747.217.9114.6075.8547.14原矿100.001.586.2118.3685.7100.00100.00100.00100.00六、浮选锌精矿的磁选试验84.38%。由于铁闪锌矿与磁黄铁矿可浮性相近难于分选，故承受磁选方法分选出磁黄铁矿，到达提高锌精矿品位的目的。16。试验结果见表22。从试验结果可呈现出，随磁场强度的增加，0.4特斯拉〔1特斯拉相当于10000高斯〕可获得锌精矿品位51.74%，锌作业回收率79.33%，对原矿回收率75.94%。可见磁选方法是分别铁闪锌矿与磁黄铁矿的有效方法。磁场强度〔T〕产品名称产率〔%〕〔%〕锌作业回收率锌对原矿回收磁场强度〔T〕产品名称产率〔%〕〔%〕锌作业回收率锌对原矿回收〔%〕磁性产品5.0011.731.460.14锌精矿95.0041.6298.5483.15给 矿100.0040.12100.00磁性产品10.719.262.580.20锌精矿89.2941.9797.4282.20给 矿100.0038.47100.00磁性产品22.0218.1710.000.30锌精矿77.9846.2090.0075.94给 矿100.0040.03100.00磁性产品36.3623.6020.670.40锌精矿63.6451.7479.3366.94给 矿100.0041.51100.00七、硫的回收目前选矿厂只回收了铅锌、浮选得出铅精矿和锌精矿。硫化铁未回收。考虑1723主要是磁黄铁矿，所以硫精矿品位较低〔40。承受硫酸为活化剂获35.1%65.26%0.005%43.6g/t。表23 硫化铁浮选结果作业对原矿硫精矿37.0435.1086.0765.261作业对原矿硫精矿37.0435.1086.0765.2616.5518.958.227.523.4212.352.80尾矿52.990.832.91给矿100.0015.10100.00硫精矿38.4232.0280.9661.3818.1923.5012.6710.523.9518.504.81尾矿49.440.481.56给矿100.0015.20100.00硫精矿28.2534.3363.7048.2917.0617.007.8812.027.6325.7412.90尾矿57.064.1415.52给矿100.0015.23100.00硫精矿22.2836.0652.7940.03113.6526.1123.429.524.1821.305.85尾矿59.894.5617.94给矿100.0015.22100.00

品位

〔%〕硫酸2023硫酸铜400碳酸钠1500硫酸亚铁50000八、产品分析按现场生产流程〔10〕14，铅锌精矿再磨的流程获得24。铜的分布状况请见表25。24最品分析〔%〕产品名称PbZnFeSAg〔g/t〕As铅精矿〔不再