卵清蛋白在镜铁矿反浮选脱硅中的应用  

Application of Ovalbumin in Reverse Flotation Desilication of Specularite

作　　者：曹鹏飞 张鹏鹏 刘军 李明阳 CAO Pengfei;ZHANG Pengpeng;LIU Jun;LI Mingyang(Sinosteel Equipment Co.,Ltd.,Beijing 100080,China;School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243032,China;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan 243000,China)

机构地区：[1]中钢设备有限公司,北京100080 [2]安徽工业大学冶金工程学院,安徽马鞍山243032 [3]中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山243000

出　　处：《金属矿山》2023年第10期94-99,共6页Metal Mine

基　　金：安徽省高等学校科学研究重点项目(编号:2022AH050305);省部共建复杂有色金属资源清洁利用国家重点实验室开放基金项目(编号:CNMRCUKF2202);金属矿山安全与健康国家重点实验室开放基金项目(编号:2022-JSKSSYS-07)。

摘　　要：镜铁矿磁性较弱且常与石英脉石伴生,导致难以获得高品位铁精矿。通过单矿物浮选试验、接触角分析、Zeta电位分析和X射线光电子能谱(XPS)分析,研究了卵清蛋白抑制剂在镜铁矿和石英阳离子反浮选分离过程中的吸附行为及作用机理。单矿物浮选结果表明,卵清蛋白对镜铁矿存在较强的选择性抑制作用,在pH=10,捕收剂十二胺(DDA)浓度为20 mg/L,卵清蛋白浓度为60 mg/L条件下,镜铁矿与石英回收率差值最大,为61个百分点。人工混合矿浮选试验结果表明,在矿浆pH=10、DDA用量为20 mg/L,卵清蛋白浓度为60 mg/L条件下,获得了铁品位为51.23%、回收率为79.66%的铁精矿。Zeta电位、接触角分析表明,卵清蛋白大量吸附在镜铁矿表面,使镜铁矿表面亲水性提升,阻碍了DDA的后续吸附。XPS分析结果证明,卵清蛋白在镜铁矿表面吸附的主要形式是酰胺基团和Fe原子结合形成了化学吸附。卵清蛋白具有成为镜铁矿和石英浮选分离抑制剂的潜力。It is difficult to obtain high-grade iron concentrate because specularite has a weak magnetic properties and is frequently association with quartz gangue.The adsorption behavior and mechanism of depressant ovalbumin on specularite and quartz in cationic reverse flotation were investigated by single-mineral flotation test,contact angle analysis,Zeta potential analysis and X-ray photoelectron spectroscopy(XPS)analysis.The results of single-mineral flotation showed that ovalbumin had a strong selective depression effect on specularite,and the best flotation indexes were obtained at pH=10,dodecylamine(DDA)concentration of 20 mg/L,and ovalbumin concentration of 61 mg/L,in which the difference of recovery was up to 61 percentage points.The Zeta potential and contact angle analysis proved that ovalbumin was adsorbed on the surface of specularite,which increased the hydrophilicity of the surface of specularite and hindered the subsequent adsorption of DDA.XPS analysis proved that ovalbumin adsorbed on the surface of specularite in the main form of amide groups with Fe atoms combined to form a chemisorption.Ovalbumin has the potential to be an depressant for goethite/quartz flotation.

关 键 词：镜铁矿 石英 浮选 卵清蛋白 抑制剂 

分 类 号：TD923[矿业工程—选矿]