中南大学学报（自然科学版）2023，Vol.54Issue(12)：4631-4639,9.DOI:10.11817/j.issn.1672-7207.2023.12.003
刺槐豆胶在镜铁矿/绿泥石浮选分离中的作用
Role of locust bean gum in flotation separation of specularite and chlorite
摘要
Abstract
The effect of locust bean gum on the recovery rate in the flotation separation of specularite/chlorite under collector dodecylamine(DDA)was investigated in single mineral tests and artificial mixed mineral flotation experiments to solve the problem of difficulty in separating specularite and chlorite because of their similar properties.Furthermore,the adsorption mechanism of locust bean gum on specularite surface was investigated through adsorption amounts measurement,Zeta potential measurement,Fourier-transform infrared spectroscopy(FT-IR)and XPS spectroscopy.The results show that locust bean gum has no significant depression effect on chlorite but exhibits strong selective depression towards specularite.The optimal separation effect is achieved at pH=6 with mass concentration of 120 mg/L of locust bean gum,resulting in a recovery rate of 28%for specularite and maintaining a recovery rate above 90%for chlorite.Artificially mixed ore experiments have also proved that locust bean gum can effectively improve the grade of iron concentrate.The adsorption strength of locust bean gum on specularite is greater than that on chlorite,but excessively high mass concentration of quality will weaken the differences in mineral adsorption.Locust bean gum is a typical non-ionic polymer that depresses specularite through chemical adsorption and hydrogen bonding.The abundant hydroxyl groups on its surface adsorb onto the surface of specularite,forming Fe(OH)3 complexes with Fe ions on the surface of specularite.This effectively improves the hydrophilicity of specularite and expands the floatability difference between specularite and chlorite.Locust bean gum has potential as a selective depressant for separating specularite from chlorite.关键词
镜铁矿/刺槐豆胶/浮选/抑制剂/抑制机理Key words
specularite/locust bean gum/flotation/depressant/depression mechanism分类
矿业与冶金引用本文复制引用
张鹏鹏,陈洲,杨诚,宫清峰,高翔鹏,李明阳..刺槐豆胶在镜铁矿/绿泥石浮选分离中的作用[J].中南大学学报（自然科学版）,2023,54(12):4631-4639,9.基金项目
国家自然科学基金资助项目(51904001) （51904001）
安徽省高等学校科学研究重点项目(2022AH050305) （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资助项目(CNMRCUKF2202) （CNMRCUKF2202）
金属矿山安全与健康国家重点实验室开放课题基金资助项目(2022-JSKSSYS-07)(Project(51904001)supported by the National Natural Science of China （2022-JSKSSYS-07）
Project(2022AH050305)supported by the Scientific Research Project of Colleges and Universities of Anhui Province （2022AH050305）
Project(CNMRCUKF2202)supported by the State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,China （CNMRCUKF2202）
Project(2022-JSKSSYS-07)supported by the State Key Laboratory of Safety and Health for Metal Mines,China) （2022-JSKSSYS-07）
