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首页> 外文期刊>Applied Surface Science >Selective flotation separation of smithsonite from calcite by application of amino trimethylene phosphonic acid as depressant
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Selective flotation separation of smithsonite from calcite by application of amino trimethylene phosphonic acid as depressant

机译：以氨基三亚甲基膦酸为抑制剂，从方解石中选择性浮选分离新铁矿

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摘要

Amino trimethylene phosphonic acid (ATMP), an eco-friendly reagent widely applied in industrial production, was employed as a depressant for flotation separation of smithsonite from calcite for the first time. Microflotation test results show that ATMP exhibits selective inhibition effect on calcite flotation. Calcite and smithsonite can be well separated in flotation process by applying ATMP as the depressant and sodium oleate (NaOL) as the collector. Based on a series of measurements including zeta potential, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR), it is found that large amounts of ATMP can be chemically absorbed on the surface of calcite by chelating with surface Ca2+ sites and thus inhibiting the adsorption of NaOL. While, in comparison, much less adsorption of ATMP is taken place on the surface of smithsonite and hardly affects further adsorption of NaOL. Atomic force microscopy (AFM) images of calcite after treated with ATMP indicate that almost the whole surface of calcite is covered with the dense agglomerate adsorption layer. All in all, these results present excellently selective depression ability of ATMP on smithsonite-calcite flotation separation process.
机译：氨基三亚甲基膦酸（ATMP）是一种广泛用于工业生产的环保试剂，首次被用作从浮石中分离史密斯铁矿和方解石的抑制剂。微浮选试验结果表明，ATMP对方解石浮选具有选择性抑制作用。通过使用ATMP作为抑制剂并使用油酸钠（NaOL）作为捕收剂，可以在浮选过程中很好地分离方解石和铁矿。基于一系列测量，包括ζ电位，X射线光电子能谱（XPS）和傅里叶变换红外（FTIR），发现大量的ATMP可通过与表面Ca2 +位点螯合而化学吸附在方解石表面。因此抑制了NaOL的吸附。相比之下，在铁锌矿表面上发生的ATMP吸附少得多，几乎不影响NaOL的进一步吸附。用ATMP处理后方解石的原子力显微镜（AFM）图像表明，方解石的几乎整个表面都被致密的团聚体吸附层覆盖。总而言之，这些结果显示了ATMP对铁矾石-方解石浮选分离过程的极好的选择性抑制能力。

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