氨基三亚甲基膦酸对氟磷灰石和白云石选择性抑制机理研究  

Study on mechanism of selective inhibition of fluorapatite and dolomite by amino trimethylene phosphonic acid

作　　者：何桂旭 张覃 He Guixu;Zhang Qin(College of Mining,Guizhou University,Guiyang Guizhou 550025,China;Guizhou Academy of Sciences,Guiyang Guizhou 550001,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guiyang Guizhou 550025,China;Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources,Guiyang Guizhou 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州科学院,贵州贵阳550001 [3]喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳550025 [4]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025

出　　处：《化工矿物与加工》2023年第11期12-17,共6页Industrial Minerals & Processing

基　　金：国家自然科学基金项目(52164018)。

摘　　要：钙镁质磷矿反浮选过程中,氟磷灰石的选择性抑制是实现高效浮选分离的前提。通过单矿物浮选试验、FTIR分析、XPS测试、Zeta电位测试和气泡-颗粒黏附动力学(BPWA)测试等手段,研究了氨基三亚甲基膦酸(ATMP)对氟磷灰石和白云石浮选行为的影响及其选择性抑制机理,结果表明:ATMP会抑制氟磷灰石上浮,但对白云石的抑制作用有限;ATMP在氟磷灰石表面的吸附作用大于白云石,更倾向于选择吸附在氟磷灰石表面;ATMP主要与氟磷灰石表面的Ca原子作用,表现为化学吸附,占据Ca位点后降低了油酸钠(NaOL)的吸附作用,导致氟磷灰石被抑制,可浮性降低。In the reverse flotation of calcium magnesium-bearing phosphate ore,selective inhibition of fluorapatite is crucial for efficient separation by flotation.In this study,the impact of Amino Trimethylene Phosphonic Acid(ATMP) on the flotation behavior of fluorapatite and dolomite together with its selective inhibition mechanism was studied using such methodologies as pure mineral flotation,FTIR spectroscopy,XPS analysis,Zeta potential measurement,and Bubble-Particle Wrap Angle testing.The results demonstrated that ATMP is likely to depress the floating of fluorapatite while having a limited impact on dolomite.ATMP presents higher adsorption capability because of the selectivity on the surface of fluorapatite than dolomite.It is found that chemisorption exhibited by ATMP reacting with Ca atom on the surface of fluorapatite as the occupation of Ca sites is lowering the adsorption of NaOL which results in the inhibition of fluorapatite and a decrease of its floatability.

关 键 词：氟磷灰石 白云石 氨基三亚甲基膦酸 气泡-颗粒黏附动力学 反浮选 抑制机理 吸附作用 

分 类 号：TD97[矿业工程—选矿]