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由于硅灰石具有高耐热和高绝缘性,因此它在工业矿物中具有重要地位,它还可以作为石棉的替代品。随着富矿的枯竭,不可避免地要处理贫矿。浮选可以有效地处理这类矿石。用牛脂1,3-氨基丙烷做捕收剂,在哈里蒙德微浮选管中浮选硅灰石。浮选回收率与其接触角有关。溶解试验表明,钙和硅组分溶解速度不一致使得在矿物表面上形成富硅层。随硅灰石粒度减小,钙离子和硅离子溶解速度减小。二胺浓度在1·10-5mol/L时获得最佳浮选效果。DRIF光谱显示,烷基谱带强度随二胺浓度增加而增强,硅灰石表面上二胺吸附量增大可以提高接触角和浮选回收率。应用不同的极性液体和非极性液体测出的接触角数值,估算了硅灰石表面自由能。并对二胺存在的条件下硅灰石的可浮性与表面自由能的关系进行探讨。
Because of its high heat resistance and high insulation, wollastonite plays an important role in industrial minerals and can be used as a substitute for asbestos. With the depletion of rich ore, it is inevitable to deal with poor ore. Flotation can effectively deal with this type of ore. Using tallow 1,3-aminopropane as a collector, wollastonite was flotated in a Harmonic micro flotation tube. Flotation recovery rate and its contact angle. Dissolution experiments show that the inconsistency in the rate of dissolution of calcium and silicon components results in the formation of a silicon-rich layer on the mineral surface. As the wollastonite particle size decreases, the rate of dissolution of calcium ions and silicon ions decreases. Diamine concentration at 1 · 10-5mol / L get the best flotation effect. DRIF spectra showed that the intensity of alkyl bands increased with the increase of diamine concentration, and the increase of diamine adsorption on the surface of wollastonite could improve the contact angle and flotation recovery. The free surface energy of the wollastonite was estimated by using the contact angles measured by different polar liquids and nonpolar liquids. The relationship between floatability and surface free energy of wollastonite in the presence of diamine was also discussed.