磷酸酯淀粉在赤铁矿阳离子反浮选脱硅中的抑制作用及QCM-D吸附研究
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摘要
以十二胺为捕收剂浮选赤铁矿和石英单矿物时,木薯原淀粉作为抑制剂选择性较差,而磷酸酯淀粉表现出较好的选择性。采用石英晶体微天平(QCM-D)测定了两种抑制剂溶液分别在Fe2O3镀层和SiO2镀层的石英晶体谐振器表面的吸附全过程,两种抑制剂在Fe2O3表面的吸附作用快、吸附紧密、吸附层质量较高、且吸附不可逆;两种抑制剂在SiO2表面的吸附层质量较低、且吸附可逆,同时吸附速度有显著差别,木薯淀粉的吸附速度快、而磷酸酯淀粉的吸附速度较慢。
In the flotation of hematite and quartz with dodecylamine as collector,the selectivity of cassava starch as depressant was poor,while phosphate ester starch showed better selectivity.The adsorption process of two depressants solutions on the surface of quartz crystal sensors of Fe_2O_3 coating and SiO_2 coating was measured by using quartz crystal microbalance(QCM-D).The adsorption of two depressant on the surface of Fe_2O_3 is fast,irreversible,and tight,and the quality of the adsorption layer is high.The adsorption of two depressant on the surface of SiO_2 was reversible and the quality of the adsorption layer is low.The adsorption rate of cassava starch and phosphate ester starch were significantly different,and the adsorption rate of phosphate ester starch was lower than that of cassava starch.
In the flotation of hematite and quartz with dodecylamine as collector,the selectivity of cassava starch as depressant was poor,while phosphate ester starch showed better selectivity.The adsorption process of two depressants solutions on the surface of quartz crystal sensors of Fe_2O_3 coating and SiO_2 coating was measured by using quartz crystal microbalance(QCM-D).The adsorption of two depressant on the surface of Fe_2O_3 is fast,irreversible,and tight,and the quality of the adsorption layer is high.The adsorption of two depressant on the surface of SiO_2 was reversible and the quality of the adsorption layer is low.The adsorption rate of cassava starch and phosphate ester starch were significantly different,and the adsorption rate of phosphate ester starch was lower than that of cassava starch.
引文
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[14]寇珏,郭玉,孙体昌,等.2种阴离子捕收剂在石英表面的吸附机理[J].中南大学学报(自然科学版),2015,46(11):4005-4014.
[15]寇珏,陶东平,孙体昌,等.新型阳离子捕收剂在磷酸盐矿反浮选中的应用及机理研究[J].有色金属(选矿部分),2010(6):51-56
[16]寇珏,杨葆华,徐世红,等.十二烷基磺酸钠在赤铁矿表面吸附动力学[J].北京科技大学学报,2016,38(10):1359-1368.
[17]张兆元.赤铁矿阴离子反浮选体系药剂作用机理与抑制剂研究[D].沈阳:东北大学,2009:67-69.
[2]王烨,唐敏.淀粉与氧化铁矿物的应用及其作用机理的研究进展[J].矿产综合利用,2015(5):17-21.
[3]尹明水,杨久流,任爱军.磷酸酯淀粉对赤铁矿抑制性能研究[J].有色金属(选矿部分),2013(2):64-67.
[4]MARK MA.Froth flotation of iron ores[J].International Journal of Mining Engineering and Mineral Processing,2012,(2):56-61.
[5]MARK MA.The significance of dosing sequence in the flocculation of hematite[J].Chemical Engineering Science,2012,73:51-54.
[6]汪桂杰,孙伟.几种改性淀粉对赤铁矿和石英抑制效果的研究[J].矿业研究与开发,2013,33(5):35-39.
[7]SHRIMALI K,MILLER J D.Polysaccharide depressants for the reverse flotation of iron ore[J].Transactions of the Indian Institute of Metals,2016,69(1):83-95.
[8]SUBRAMANIAN S,NATARAJAN K A.Selective flocculation studies on iron ore minerals[J].Transactions of the Indian Institute of Metals,1987,40(6):489-496.
[9]印万忠,孙传尧.淀粉及其与Pb2+对硅酸盐矿物抑制和协同抑制作用的晶体化学分析[J].矿冶,1999,8(1):19-24.
[10]孙传尧,印万忠.硅酸盐矿物浮选原理[M].北京:科学出版社,2001:156-160.
[11]张行荣,郑桂兵,艾晶,等.赤铁矿反浮选淀粉抑制作用第一性原理[J].中国有色金属学报,2016,26(2):465-470.
[12]SOUVI S M O,BADAWI M,PAUL J F,et al.A DFTstudy of the hematite surface state in the presence of H2,H2O and O2[J].Surface Science,2013,610:7-15.
[13]刘若华.不同淀粉对赤铁矿抑制机理及工艺研究[D].长沙:中南大学,2012:78-80.
[14]寇珏,郭玉,孙体昌,等.2种阴离子捕收剂在石英表面的吸附机理[J].中南大学学报(自然科学版),2015,46(11):4005-4014.
[15]寇珏,陶东平,孙体昌,等.新型阳离子捕收剂在磷酸盐矿反浮选中的应用及机理研究[J].有色金属(选矿部分),2010(6):51-56
[16]寇珏,杨葆华,徐世红,等.十二烷基磺酸钠在赤铁矿表面吸附动力学[J].北京科技大学学报,2016,38(10):1359-1368.
[17]张兆元.赤铁矿阴离子反浮选体系药剂作用机理与抑制剂研究[D].沈阳:东北大学,2009:67-69.