摘要
萤石常与方解石等脉石矿物伴生,二者表面都有Ca活性位点,使得脂肪酸类捕收剂难以选择性吸附于萤石表面。前期试验发现磷酸酯类药剂对萤石具有选择性捕收能力,且捕收能力较强,有利于分离萤石和方解石。通过浮选试验研究了2-乙基己基磷酸酯(2ZHP)对萤石和方解石浮选行为的影响,并采用Zeta电位、红外光谱、X射线光电子能谱等分析手段,探究药剂的作用机理。结果表明:在p H值为4~7时,添加0.75×10^(-5)mol/L的2ZHP,萤石有较好的可浮性,与方解石的可浮性差异较大,有利于实现萤石与方解石的浮选分离;2ZHP能在萤石与方解石表面发生不同程度的化学吸附,萤石表面钙活性位点多,导致萤石对药剂的吸附量比方解石大是萤石的浮选效果优于方解石的主要原因。
Fluorite is often associated with gangue minerals such as calcite,and both surfaces have Ca active sites,making it difficult for fatty acid collectors to selectively adsorb on the surface of fluorite.Previous experiments have found that phosphate esters have selective collecting ability for fluorite,and the collecting ability is strong,which is beneficial to the separation of fluorite and calcite.The effect of 2-ethylhexyl phosphate(2ZHP)on the flotation behavior of fluorite and calcite was studied by flotation test,and the mechanism of the reagent was explored by Zeta potential,infrared spectroscopy,X-ray photoelectron spectroscopy and other analytical methods.The results show that fluorite has better floatability when 0.75×10^(-5) mol/L 2ZHP is added at pH 4~7.Fluorite has good floatability,which is quite different from that of calcite,which is conducive to the flotation separation of fluorite and calcite.2ZHP can have different degrees of chemical adsorption on the surface of fluorite and calcite.There are many calcium active sites on the surface of fluorite,which leads to the larger adsorption capacity of fluorite to the agent than that of calcite,which is the main reason for the better flotation effect of fluorite than that of calcite.
作者
汤家焰
赵芳
何嘉宁
王介良
曹钊
魏博
张臻悦
池汝安
TANG Jiayan;ZHAO Fang;HE Jianing;WANG Jieliang;CAO Zhao;WEI Bo;ZHANG Zhenyue;CHI Ru′an(School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,China;Inner Mongolia Key Laboratory of Mining Engineering,Baotou 014010,China;Inner Mongolia Research Center for Coal Safety Mining and Utilization Engineering and Technology,Baotou 014010,China;Inner Mongolia Cooperative Innovation Center for Coal Green Mining and Green Utilization,Baotou 014010,China;Institute of Technical Information for Building Materials Industry,Beijing 100020,China;School of Resources&Safety Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《金属矿山》
北大核心
2024年第12期125-131,共7页
Metal Mine
基金
国家自然科学基金项目(编号:52264033,52364034)
国家重点研发计划项目(编号:2021YFC2901000,2022YFC2905302)
内蒙古自治区杰出青年科学基金(编号:2024JQ02)
内蒙古自治区教育厅一流学科科研专项(编号:YLXKZX-NKD-037,YLXKZX-NKD-004)
湖北省自然科学基金创新群体项目(编号:2023AFA044)。
