白钨矿与磷灰石浮选的选择性抑制及机理研究
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摘要
油酸钠为捕收剂时白钨矿和磷灰石的可浮性相近,难以实现分离。通过浮选试验、理论计算和动电位测定的方法研究了硅酸钠和焦磷酸钠对白钨矿与磷灰石的选择性抑制作用。结果表明,硅酸钠对白钨矿和磷灰石的抑制作用相似,而焦磷酸钠能够以P2O47-的形式强烈抑制磷灰石,同时对白钨矿的抑制能力较弱。机理研究表明,焦磷酸钠的基团电负性介于钨酸根和磷酸根离子之间,且磷灰石表面的钙离子密度大于白钨矿,使焦磷酸钠对磷灰石的抑制作用强于白钨矿。
The flotation behaviors of scheelite and apatite are similar when using sodium oleate as a collector,which result in the difficulty of the flotation separation of scheelite from apatite.The selective inhibition of sodium pyrophosphate on the flotation behavior of scheelite and apatite was investigated through the flotation tests,theoretical calculation and zeta potential measurement.The results indicate that the sodium silicate has similar inhibitory effects on scheelite and apatite,while sodium pyrophosphate can strongly inhibit apatite in the form of P2 O47-,while the inhibition ability of scheelite is weak.The mechanism study shows that the group electronegativity of sodium pyrophosphate is between tungstate and phosphate ions.In addition,the density of calcium ions on the surface of apatite is greater than that of scheelite,which results in the inhibition of apatite is stronger than that of scheelite.
The flotation behaviors of scheelite and apatite are similar when using sodium oleate as a collector,which result in the difficulty of the flotation separation of scheelite from apatite.The selective inhibition of sodium pyrophosphate on the flotation behavior of scheelite and apatite was investigated through the flotation tests,theoretical calculation and zeta potential measurement.The results indicate that the sodium silicate has similar inhibitory effects on scheelite and apatite,while sodium pyrophosphate can strongly inhibit apatite in the form of P2 O47-,while the inhibition ability of scheelite is weak.The mechanism study shows that the group electronegativity of sodium pyrophosphate is between tungstate and phosphate ions.In addition,the density of calcium ions on the surface of apatite is greater than that of scheelite,which results in the inhibition of apatite is stronger than that of scheelite.
引文
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[2]KUPKA N,RUDOLPH M.Froth flotation of scheelite-A review[J].International Journal of Mining Science and Technology,2018,28(3):373-384.
[3]朱海玲,覃文庆,陈臣,等.阴-非离子复配表面活性剂对白钨矿的低温捕收性能及其应用[J].中国有色金属学报,2016,26(10):2188-2196.ZHU Hailing,QIN Wenqing,CHEN Chen,et al.Lowtemperature collecting performance of mixed anionicnonionic surfactants for scheelite flotation and its application[J].The Chinese Journal of Nonferrous Metals,2016,26(10):2188-2196.
[4]LI C G,LY X.Selective flotation of scheelite from calcium minerals with sodium oleate as a collector and phosphates as modifiers.I.Selective flotation of scheelite[J].International Journal of Mining Process,1983,10(3):205-218.
[5]孙伟,胡岳华,覃文庆,等.钨矿浮选药剂研究进展[J].矿产保护与利用,2000(3):42-46.SUN Wei,HU Yuehua,QIN Wenqing,et al.The development of flotation reagents of tungsten ore[J].Conservation and Utilization of Mineral Resources,2000(3):42-46
[6]SHIN B S,CHOI K S.Adsorption of sodium metasilicate on calcium minerals[J].Miner.Metall.Process,1985,2(4):223-226.
[7]陶洪,张芹,王飞,等.油酸钠体系中微细粒赤铁矿的浮选行为[J].金属矿山,2012(6):61-63.TAO Hong,ZHANG Qin,WANG Fei,et al.Flotation behavior of ultrafine hematite in sodium oleate flotation system[J].Metal Mine,2012(6):61-63.
[8]高莹,韩跃新,陈晓龙,等.吉林临江低品位硅藻土反浮选提纯研究[J].金属矿山,2014(10):65-68.GAO Ying,HAN Yuexin,CHEN Xiaolong,et al.Purification of a low-grade diatomite from Jinlin by reverse flotation[J].Metal Mine,2014(10):65-68.
[9]张亚辉.浮选药剂与矿物界面作用的镜像对称规则[J].有色金属(选矿部分),2016(4):87-93.ZHANG Yahui.Mirror symmetry rule for the interaction between flotation reagents and mineral interfaces[J].Nonferrous Metals(Minerals Processing Section),2016(4):87-93.
[10]张英,胡岳华,王毓华,等.硅酸钠对含钙矿物浮选行为的影响及作用机理[J].中国有色金属学报,2014,24(9):2366-2372.HANG Ying,HU Yue-hua,WANG Yuhua,et al.Effects of sodium silicate on flotation behavior of calcium-bearing minerals and its mechanism[J].The Chinese Journal of Nonferrous Metals,2014,24(9):2366-2372.