四种羟基羧酸对含钙矿物浮选的影响  

Effects of Four Hydroxyl Carboxylic Acids on Flotation of Calcium Minerals

作　　者：何嘉宁 张少杰 邓忠诚 李沛 汤家焰 HE Jianing;ZHANG Shaojie;DENG Zhongcheng;LI Pei;TANG Jiayan(School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory of Mining Engineering of Inner Mongolia Autonomous Region,Baotou 014010,China;Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources,Baotou 014010,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]内蒙古自治区矿业工程重点实验室,内蒙古包头014010 [3]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：《金属矿山》2022年第4期115-121,共7页Metal Mine

基　　金：内蒙古自然科学基金项目(编号:2019BS05019);内蒙古自治区高等学校科学研究项目(编号:NJZY19131);内蒙古科技大学创新基金项目(编号:2019QDL-B30)。

摘　　要：通过浮选试验、Zeta电位测定、X射线光电子能谱(XPS)分析、溶液化学计算,研究柠檬酸、酒石酸、苹果酸、水杨酸4种羟基羧酸对稀土尾矿中萤石、磷灰石和方解石浮选行为的影响,结果表明:油酸钠作为捕收剂时,四种羟基羧酸的抑制能力大小为萤石(柠檬酸>酒石酸>苹果酸>水杨酸),磷灰石(柠檬酸>酒石酸=苹果酸>水杨酸)以及方解石(柠檬酸>苹果酸>酒石酸=水杨酸)。柠檬酸对萤石和方解石具有选择性抑制效果。在p H=6.8时,1.6×10^(-4)mol/L柠檬酸和1.0×10^(-4)mol/L油酸(约等于30 mg/L油酸钠)都以阴离子形式存在,并以矿物表面的Ca为作用位点,产生竞争吸附。矿物表面Ca的电子结合能大小决定了柠檬酸对矿物抑制能力的大小,萤石>磷灰石>方解石。Through flotation test,Zeta potential measurement,X-ray photoelectron spectroscopy(XPS) analysis and solution chemical calculation,the effects of citric acid,tartaric acid,malic acid,salicylic acid on the flotation behavior of fluorite,apatite and calcite in rare earth tailings are studied. The results showed that when sodium oleate is used as collector,the inhibitory abilities of the four hydroxycarboxylic acids are fluorite(citric acid > tartaric acid > malic acid > salicylic acid),apatite(citric acid > tartaric acid = malic acid > salicylic acid) and calcite(citric acid > malic acid > tartaric acid = salicylic acid). Fluorite and calcite can be selectively inhibited by citric acid. At pH = 6. 8,1. 6×10^(-4)mol/L citric acid and 1. 0×10^(-4)mol/L oleic acid(about 30 mg/L sodium oleate) exists in the form of anion and takes Ca on the mineral surface as the action site to produce competitive adsorption. The electronic binding energy of Ca on the mineral surface determines the inhibitory ability of citric acid on minerals,fluorite > apatite > calcite.

关 键 词：羟基羧酸 萤石 磷灰石 方解石 抑制 

分 类 号：TD923[矿业工程—选矿]