3种捕收剂对氟碳铈矿的浮选性能研究

Floatation Study of Three Kinds of Collectors Towards Bastnaesite

研究了不同条件下油酸钠、水杨羟肟酸和牦牛坪稀土捕收剂(主要成分为羟基萘羟肟酸)浮选氟碳铈矿的规律,并对其浮选机理进行了探讨。试验结果表明:捕收剂、硅酸钠的用量对氟碳铈矿的浮选影响显著;油酸钠和牦牛坪稀土捕收剂较水杨羟肟酸有更好的浮选效果;在氟碳铈矿的零电点pH=8.5附近,3种捕收剂对氟碳铈矿的浮选效果最佳;羟肟酸类捕收剂在氟碳铈矿表面发生络合反应,而油酸钠可能以静电吸附和分子吸附为主;药剂在矿物表面的竞争吸附或形成配合物均破坏了缔合羟基;水杨羟肟酸和牦牛坪稀土捕收剂在红外光谱图的2356 cm-1附近有新的峰形成,可能是螯合反应形成的五元螯合环。

Under different conditions,the floatation laws of sodium oleate,salicylhydroxami acid and Maoniuping rare earth collector（principal components are hydroxyl naphthalene-containing hydroximic acid） as collectors for bastnaesite are researched and the relative flotation mechanism are studied.Experimental results show：the dosage of collecting agent and sodium silicate has great influence towards bastnaesite floatation;the floatation effect of sodium oleate and Maoniuping rare earth collector is better than that of salicylhydroxami acid;round point of zero charge of bastnaesite where pH=8.5,the three kind of collecting agent have best floatation effect for bastnaesite;for collecting agents as hydroximic acid,complex reaction occers at bastnaesite surface,whereas sodium oleate may react in the manner of electrostatic adsorption and molecular adsorption;Competitive adsorption at mineral surface and formation of complex destroy association hydroxyl,salicylhydroxami acid and Maoniuping rare earth collector has new peak at 2 356 cm-1,and pentatonic chelate loop maybe formats.