新萃取剂实验报告

一实验目的验证钴车间p204进入镍钴分离段中是否会对镍钴分离能力产生影响；检验国产G272萃取剂的镍钴分离能力，同时与6500进行混合萃取，观察其萃取效果。二实验前期准备纯G272比重约在0.9纯6500比重0.92萃取剂皂化前氢离子浓度皂化率皂化后氢离子浓度15%APT65000.47650.1515%G2720.34650.1221%G2720.45650.157.5%G272+7.5%65000.45650.15根据萃取剂比重和稀释后氢离子浓度对比，推测G272浓度较低。三实验方案将以上4种配好的萃取剂同时进行萃取实验，对比每次的萃取分离效果。取现场镍钴分离段的各级溶液，作为含钴浓度不同的溶液，按照现场萃取方向进行萃取。水油相比1:16级时取430ml萃取剂，萃取后取出60ml有机化验，8级再取出60ml有机化验，10级取出60ml有机化验用级数6789101112有机体积(ml)430370370310310250250分配比D和萃取率E是萃取的重要参数，被萃取物的数值越大，表明该物质越容易被萃取；分配比D=有机相中被萃取物的总浓度/水相中被萃取物的总浓度萃取率E=*100%；分离系数β是表示两种物质萃取分离难易程度的实验参数，β=DA/DB四实验结果表１各级萃取前液成分(g/L)NiCoMgCaCuFeZnMn6级80.801.646.670.700.000480.000710.00110.000948级87.045.936.050.680.000450.000860.00100.001310级91.607.005.830.660.000460.000950.00110.001412级101.206.605.720.650.000350.00100.00110.0023洗镍液17.6511.276.570.520.000470.000460.000380.00014表221%G272萃余液与有机相成分及各级分配比，萃取率，分离系数21%G2726级8级10级12级水相Co0.0773.396.767.12油相Co1.766.397.647.35水相Ni79.2087.3692.8896.00油相Ni0.870.330.220.23DCo22.8571.8851.1301.032DNi0.0110.0040.0020.002ECo95.8%65.3%53.1%50.8%ENi1.09%0.38%0.24%0.24%β2078471565516表315%G272萃取剂各项参数15%G2726级8级10级12级水相Co0.194.526.937.18油相Co1.565.005.395.29水相Ni80.4087.8494.4096.88油相Ni0.460.210.190.25DCo8.2111.1060.7780.737DNi0.0060.0020.0020.003ECo89.1%52.5%43.8%42.4%ENi0.57%0.24%0.20%0.26%β1369553389246表415%6500萃取剂各项参数15%65006级8级10级12级水相Co0.0543.376.767.55油相Co0.936.897.547.58水相Ni79.2088.0094.4097.60油相Ni0.460.130.0590.061DCo17.2222.0451.1151.004DNi0.0060.0010.0010.001ECo94.5%67.2%52.7%50.1%ENi0.58%0.15%0.06%0.06%β2870204511151004表51:1混合有机萃取各项参数1:1混合6级8级10级12级水相Co0.0563.316.897.34油相Co0.976.347.737.78水相Ni77.6086.0096.0096.88油相Ni0.410.300.160.16DCo17.3211.9151.1221.060DNi0.0050.0030.0020.002ECo94.54%65.70%52.87%51.46%ENi0.53%0.35%0.17%0.16%β3464638561530五结论6级到12级萃取前液钴含量是从低到高，萃取剂钴含量也由低到高分配比，萃取率，分离系数应该随着萃取剂中的钴含量的上升而减小。这四种萃取剂均能实现镍钴的分离。观察15%G272萃取剂，因其可用氢离子少（0.34），最终有机相钴含量较低只有5.29g/L。观察21%G272，15%6500，1:1混合萃取剂的3组萃取效果，有机相中钴含量均在7.0g/L以上，镍含量均在0.25g/L以下。分析这3组萃取参数可以看到，同级数下6500的分配比，萃取率，分离系数均高于新萃取剂G272，6500萃取剂镍钴分离系数在G272分离系数的两倍以上。混合萃取剂的分配比，萃取率，分离系数与6500相比均有所下降。附各化验数据6级液NiCoMgCaCuFeZnMn21%G27279.200.0774.740.640.000300.00100.00100.0007515%G27280.400.195.040.620.000270.000760.000970.0007815%650079.200.0544.340.660.000250.00150.000950.000741:1混合77.600.0568级液NiCoMgCaCuFeZnMn21%G27287.363.396.550.790.000300.00100.00100.0009915%G27287.844.525.940.700.000290.000810.00100.001015%650088.003.370.000990.710.000280.00150.00100.000991:1混合86.003.3110级液NiCoMgCaCuFeZnMn21%G27292.886.765.780.740.000350.00120.00110.001215%G27294.406.935.270.690.000320.000930.00110.001315%650094.406.765.640.670.000280.00140.00110.00121:1混合96.006.8912级液NiCoMgCaCuFeZnMn21%G27296.007.125.750.700.000360.00120.000990.001615%G27296.887.185.330.690.000360.000880.00110.001715%650097.607.555.630.690.000340.00140.00110.00161:1混合96.887.346级油NiCoMgCaCuFeZnMn21%G2720.871.762.630.0840.000350.000470.000460.0009915%G2720.461.561.670.0340.000550.000940.000340.0009615%65000.460.933.330.00860.000360.00120.000200.00101:1混合0.410.978级油NiCoMgCaCuFeZnMn21%G2720.336.390.710.0140.000600.000590.000510.001915%G2720.215.000.370.0120.000410.000970.000400.0001615%65000.136.890.750.00200.000530.00120.000200.00211:1混合0.306.3410级油NiCoMgCaCuFeZnMn21%G2720.227.640.330.00830.000860.00200.000560.002315%G2720.195.390.200.00670.000610.00110.000440.001815%65000.0597.540.330.00130.000740.00110.000270.00281:1混合0.167.7312级油NiCoMgCa