水玻璃和EDTA对氟碳铈矿与萤石浮选分离作用对比试验研究  

Experimental Study on the Effect of Water Glass and EDTA on the Flotation Separation of Bastnaesite and Fluorite

作　　者：王介良 迈倩琳 程泽宇 曹钊 WANG Jieliang;MAI Qianlin;CHENG Zeyu;CAO Zhao(School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China;State Key laboratory of Mineral Processing,Beijing 100160,China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China;Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources,Baotou 014010,Inner Mongolia,China)

机构地区：[1]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010 [2]矿物加工科学与技术国家重点实验室,北京100160 [3]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合,利用重点实验室,内蒙古包头014010 [4]白云鄂博共伴生矿资源高效综合利用省部共建协同创新中心,内蒙古包头014010

出　　处：《有色金属（选矿部分）》2021年第6期181-188,共8页Nonferrous Metals（Mineral Processing Section）

基　　金：国家自然科学基金资助项目(51764045);矿物加工科学与技术国家重点实验室开放基金(BGRIMM-KJSKL-2020-23);内蒙古自然科学基金资助项目(2019MS05039;2020LH05027)。

摘　　要：通过纯矿物浮选试验、Zeta电位测试、X射线光电子能谱(XPS)测试与分析,研究对比了水玻璃、EDTA对氟碳铈矿与萤石的抑制作用及机制。结果表明,水玻璃对萤石抑制作用较强,对氟碳铈矿抑制作用较弱;EDTA对萤石抑制作用较强,对氟碳铈矿几乎没有抑制作用。采用EDTA为抑制剂时,氟碳铈矿和萤石浮选分离系数(12.66)远高于水玻璃(2.00),EDTA可实现对萤石的选择性抑制。XPS测试表明,水玻璃通过矿物表面吸附起到抑制作用,而EDTA通过络合溶解矿物表面金属阳离子起到抑制作用。EDTA络合氟碳铈矿表面Ce活性位点能力较弱,对OHA在氟碳铈矿表面的吸附影响较小,而EDTA络合萤石表面Ca活性位点能力强,大大降低萤石表面Ca活性位点密度,阻碍了OHA在其表面的吸附,从而达到选择性抑制效果,使二者高效分离。The inhibition effect and mechanism of water glass and EDTA on fluorite and bastnaesite were studied and compared through pure mineral flotation test, Zeta potential test, X-ray photoelectron spectroscopy(XPS) analysis.The results showed that the inhibition of water glass on fluorite was stronger than that on bastnaesite.EDTA has strong inhibition effect on fluorite, but no inhibition effect on bastnaesite.When EDTA was used as the inhibitor, the separation factor of bastnaesite and fluorite was 12.66,which was much higher than that of sodium silicate(2.00).The selective inhibition of fluorite could be realized by using EDTA.The XPS results showed that the inhibition effect of sodium silicate is due to the adsorption on the mineral surface, while the inhibition effect of EDTA is due to the complexing dissolution of metal cations on the mineral surface.EDTA has a weak ability to complex Ce active sites on the surface of bastnaesite, and has little effect on the adsorption of OHA on the surface of bastnaesite, while EDTA has a strong ability to complex Ca active sites on the surfaces of fluorite, which greatly reduces the density of Ca active sites and hinders the adsorption of OHA on the surfaces of fluorite, thus achieving a selective inhibition effect and enabling the two to be efficiently separated.

关 键 词：氟碳铈矿 萤石 浮选 水玻璃 EDTA 

分 类 号：TD955[矿业工程—选矿]