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Preparation and Characterization of Surface Modification of Sphalerite Concentrate with Sodium Lignosulfonate

机译：木质素磺酸钠对闪锌矿精矿表面改性的制备与表征

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摘要

In order to prevent sphalerite particles from coming together in leaching solution, and to reduce the loss of organic solvent, the surface modification of sphalerite concentrate with sodium lignosulfonate was investigated. The modified sphalerite concentrate particles were characterized by dispersion experiments, determination of adsorption rate of oil, determination of contact angle, FT-IR spectra and X-ray photoelectron spectra. The results showed that the modified sphalerite concentrate particles exhibited good dispersibility in water. The sedimentation volume reduced from 0.85 ml·g~(-1) to 0.61 ml·g~(-1). The adsorption rate of oil reduced from 0.15 ml·g~(-1) to 0.06 ml·g~(-1). The contact angle between sphalerite concentrate particles and water changed from 86.9° before modification to 32.7° after modification with sodium lignosulfonate. The checking results of FT-IR and XPS spectra indicated that some modification regents were coated on the particle surface. The modifier combined to sphalerite concentrate particle surface through the chemical bond, resulting in the comprehensive stability action of static and steric effect.
机译：为了防止闪锌矿颗粒在浸出溶液中聚集在一起并减少有机溶剂的损失，研究了木质素磺酸钠对闪锌矿精矿的表面改性。通过分散实验，吸油率测定，接触角测定，FT-IR光谱和X射线光电子能谱对改性闪锌矿精矿颗粒进行了表征。结果表明，改性闪锌矿精矿颗粒在水中具有良好的分散性。沉淀量从0.85 ml·g〜（-1）减少到0.61 ml·g〜（-1）。油的吸附速率从0.15 ml·g〜（-1）降低到0.06 ml·g〜（-1）。闪锌矿精矿颗粒与水的接触角从改性前的86.9°变为木质素磺酸钠改性后的32.7°。 FT-IR和XPS光谱的检查结果表明，一些改性剂被包覆在颗粒表面。改性剂通过化学键结合到闪锌矿中浓缩了颗粒表面，从而产生了静电和空间效应的综合稳定作用。

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