(中南大學(xué) 資源加工與生物工程學(xué)院，長沙410083)
摘 要: 通過浮選實驗、潤濕接觸角測定、Zeta電位測試和泡沫水回收率測定，考察pH值、樣品粒度、礦漿濃度和起泡劑種類與用量等因素對金川硫化銅鎳礦中的主要脈石礦如微細(xì)粒蛇紋石可浮性的影響，并對其機(jī)理進(jìn)行分析。結(jié)果表明：蛇紋石的潤濕接觸角為37.6˚，屬于親水性礦物，天然可浮性差；隨著蛇紋顆粒粒度的減小以及礦漿濃度的增大，其浮選回收率升高；起泡劑對蛇紋石的表面電性和潤濕性影響不大，而在微細(xì)粒蛇紋石的浮選中，不同起泡劑種類和用量下的泡沫水回收率與礦物浮選回收率具有良好的對應(yīng)關(guān)系，可以推測泡沫夾帶是蛇紋石浮選進(jìn)入精礦的重要原因。
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The effects of pH value, particle size, pulp concentration, variety and dosage of frother on the floatability of fine serpentine in Jinchuan copper-nickel sulphide were investigated by flotation tests and measurement of contact angle, zeta-potential and foam water recovery rate, the flotation mechanism of the fine serpentine was analyzed. The results show that the serpentine is a kind of natural hydrophilic mineral with contact angle of 37.6˚, which results in poor inherent floatability. The flotation recovery rate of the serpentine is improved with decreasing particle size and increasing pulp density. The effects of frother variety and dosage on the surface potential and wettability of serpentine are not obvious, but the flotation recovery rate of the serpentine corresponds well with the foam water recovery rate at different frother variety and dosage. It can be concluded that foam entrainment is the main reason for serpentine entering into flotation concentrate.
Key words: serpentine; foam water; floatation; entrainment
