摘要
苯甲羟肟酸(BHA)和辛基羟肟酸(OHA)以及二者组合羟肟酸(BHA+OHA)下,对氟碳铈矿、方解石、萤石三种矿物进行了浮选研究。通过红外光谱分析、总有机碳和紫外光谱吸附量测试和XPS分析研究了羟肟酸类在矿物表面的作用机理。结果表明:在pH=9.5、组合捕收剂(n(BHA)∶n(OHA)=2∶1)浓度为3×10^(-4) mol/L和盐化水玻璃3×10^(-3) mol/L条件下,氟碳铈矿、方解石和萤石的回收率分别为89.8%、18.5%和13.7%,人工混合矿REO品位由28.90%提升至55.41%,氟碳铈矿的回收率为80.41%,与方解石和萤石实现较好分离;组合捕收剂(BHA+OHA)在三种矿物表面发生共吸附,且组合捕收剂中每种药剂的吸附率大于相同浓度的单一药剂;盐化水玻璃阻碍捕收剂在方解石、萤石表面的吸附对捕收剂在氟碳铈矿表面吸附无影响,可以达到抑制方解石和萤石的目的,实现氟碳铈矿的选择性浮选。
Under the condition of benzohydroxamic acid(BHA)and octyl hydroxamic acid(OHA)as well as combined hydroxamic acid as collectors,the flotation processes of bastnaesite,calcite and fluorite were investigated.The action mechanism of hydroxamic acids on the mineral surface was studied using infrared spectroscopy analysis,total organic carbon(TOC),ultraviolet spectrum adsorption test and XPS analysis.The results indicate that,at pH=9.5,the total concentration of the combined collector(n(BHA)∶n(OHA)=2∶1)is 3×10^(-4) mol/L and the concentration of salted water glass is 3×10^(-3) mol/L.The recoveries of bastnaesite,calcite,and fluorite are found to be 89.7%,18.7%,and 13.5%,the grade of REO in artificial mixed ore increase from 28.90%to 55.41%,and the recovery rate of bastnaesite is 80.41%.respectively.The bastnaesite exhibits significant flotation differences compared to the two gangue minerals.Co-adsorption is observed on the mineral surface,with the adsorption rate of BHA+OHA in the combined collector being higher than that of a single agent with the same concentration.Salted water glass impedes the adsorption of collectors on the surface of calcite and fluorite,while it has no effect on the adsorption of collectors on the surface of bastnaesite ore.It can research the purpose of inhibiting calcite and fluerite and achieve selective flotation of bastnasite ore.
作者
孙文豪
蒋昊
徐艳玲
李新冉
刘娇娇
滕鑫
SUN Wenhao;JIANG Hao;XU Yaning;LI Xinran;LIU Jiaojiao;TENG Xin(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2024年第2期611-624,共14页
The Chinese Journal of Nonferrous Metals
关键词
氟碳铈矿
方解石
萤石
组合羟肟酸
盐化水玻璃
选择性浮选
bastnaesite
calcite
fluorite
combined hydroxamic acid
salted water glass
selective flotation
