摘要
通过纯矿物浮选试验、zeta电位测定、红外光谱测试及实际矿物浮选中应用,考察柠檬酸在磷矿反浮选中的作用机理。结果表明,在p H值为3.86,油酸钠作捕收剂,柠檬酸作抑制剂时,柠檬酸对磷灰石和方解石都表现出较好的抑制效果;对磷灰石和方解石的混合矿物表现出较好的选择性抑制效果,优先抑制磷灰石。zeta电位和红外光谱测试表明,柠檬酸在磷灰石表面发生吸附且使其表面动电位负移,增强了磷灰石与油酸根阴离子的静电排斥作用,减少磷灰石表面对油酸根阴离子的有效吸附,从而达到抑制磷灰石的目的。在清平磷矿正浮精矿反浮选试验中,柠檬酸抑制效果优于磷酸,用硫酸调节矿浆p H值为4.2左右,柠檬酸用量为0.45 kg/t,捕收剂OY-68用量为0.6 kg/t时,最终可获得P2O5品位为32.64%,回收率为90.62%的精矿产品。
Pure ore flotation,zeta potential determination,infrared spectrum test and actual mineral flotation were used to investigate the mechanism of citric acid in phosphate ore reverse flotation.The results showed that when pH ralue was 3.86,sodium oleate was used as collector and citric acid was used as inhibitor,citric acid showed good inhibitory effect on apatite and calcite.The selective inhibition of apatite was better than that of calcite.The zeta potential and infrared test showed that citric acid adsorbed on the apatite surface and made its surface zeta potential negativey shift,which enhanced the electrostatic repulsion between apatite and oleate anion,reduced the effective adsorption of oleate anion on the apatite surface,thus achieved the purpose of effectively inhibiting apatite.The inhibition effect of citric acid was better than that of phosphoric acid in the reverse flotation test of the positive floating concentrate of Qingping phosphate.When the pH value was 4.2,adjusted with sulfuric acid,the dosage of citric acid was 0.45 kg/t and the collector OY-68 was 0.6 kg/t,the concentrates with P2O5 grade 32.64%and recovery rate 90.62%can be obtained.
作者
汤家焰
张静茹
罗惠华
祝雯
李沛
李成秀
Tang Jiayan;Zhang Jingru;Luo Huihua;Zhu Wen;Li Pei;Li Chengxiu(Institute of Mining Engineering,Inner Mongolia University of Science and Technology,Baotou,Inner Mongolia 014010;School of Mining and Coal Engineering,Inner Mongolia University of Science and Technology,Baotou,Inner Mongolia 014010;Xingfa school of Mining Engineering,Wuhan Institute of Technology,Wuhan,Hubei 430074;Institute of Multipurpose Utilization of Mineral Resources,CAGS,Chengdu,Sichuan 610041)
出处
《非金属矿》
CAS
CSCD
北大核心
2020年第5期55-58,共4页
Non-Metallic Mines
基金
内蒙古自然科学基金(2019BS05019)
内蒙古自治区高等学校科学研究项目(NJZY19131)
内蒙古科技大学创新基金项目(2019QDL-B30)
湖北省技术创新重大项目(2017ACA187)。
关键词
柠檬酸
浮选
磷灰石
方解石
citric acid
flotation
apatite
calcite
