摘要
对Georgia-Pacific公司的新型阳离子胺类捕收剂605G83在佛罗里达CF Industries公司的磷酸盐反浮选石英中的应用效果进行了研究。在不同浓度下用石英晶体微天平(QCM-D)并结合ζ—电位研究了捕收剂在石英表面的吸附机理,并在相同条件下与CF Industries目前所用的乙酸酰胺PA70进行比较。浮选试验考察了捕收剂用量、pH值以及浮选时间等参数对捕收剂浮选效果的影响,结果表明,当pH为7,捕收剂605G83用量为1.0kg/t,正浮选回收率最高可达到92.1%,品位31.5%。QCM-D测定结果显示,605G83在石英表面可以形成规则且牢固的吸附层,使石英表面的疏水性更强,从而得到较高的浮选效果,增大浓度后,吸附膜结构和吸附密度变化不大。PA70在高浓度下会生成能量耗散较高且吸附不稳定的多层结构吸附膜。
In this paper,a newly developed cationic amine collector 605G83 supplied by Georgia-Pacific Chemicals LLC was investigated as the collector for the reverse flotation of quartz from phosphate ore from CF Industries phosphate rock mine in Florida.Its adsorption on the surface of quartz was characterized using a novel surface characterization technique referred to as Quartz Crystal Microbalance with Dissipation technique（QCM-D） and ζ-potential in comparison with the plant amine collector of CF Industries（PA70） which was the amidoamine acetates.The effect of the new collector on reverse flotation was evaluated using a laboratory mechanical flotation cell at different process parameters such as pH,collector dosage and flotation time.The highest recovery of 92.1% was achieved when 605G83 was used at the dosage of 1.0 kg/t at pH 8 with grade of 31.5%.The data of QCM-D showed that 605G83 adsorbed on phosphate more readily and formed the higher density and rigid adsorption layer which produced stronger hydrophobicity and better flotation performance.However,the adsorption density of 605G83 had no big change with increasing the solution concentration.The multilayer with higher energy dissipation was formed on quartz surface with PA70 at higher concentration,and the adsorption was less rigid.
出处
《有色金属（选矿部分）》
CAS
2010年第6期51-56,共6页
Nonferrous Metals（Mineral Processing Section）
