(中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 通過DLVO理論計算、動電位、接觸角和掃描電鏡檢測及浮選試驗，研究影響鈦輝石和鈦鐵礦顆粒間相互作用的3個主要因素，即表面電性、顆粒粒徑和表面潤濕性。結(jié)果表明，鈦輝石和鈦鐵礦的表面荷電絕對值增大，則顆粒間斥力增大；粒徑越大，斥力越大。通過人工混合礦浮選試驗結(jié)果和掃描電鏡檢測驗證，微細粒鈦輝石會在鈦鐵礦表面發(fā)生罩蓋現(xiàn)象；礦物表面疏水性增強，兩種礦物顆粒間的引力相應(yīng)增大。
關(guān)鍵字: 鈦輝石；鈦鐵礦；表面電性；顆粒粒徑；表面潤濕性
titanaugite and ilmenite
（School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:Three main factors (viz. surface potential, particle size and surface wettability) that influence the interparticle interaction between titanaugite and ilmenite particles were investigated in detail through the calculation of DLVO theory, measurements of electrokinetic potential and contact angle, experiments of floatation and characterization of scanning electron microscope (SEM). The results show that the repulsion between particles increases with increasing absolute surface potential of titanaugite and ilmenite, and the bigger the particle size, the greater the repulsion. According to the results of floatation of artificial mixed mineral and characterization of SEM, the surface of ilmenite will be coated by micro-size titanaugite, and the increase of mineral surface hydrophobicity can result in the increase of attractive force between the two kinds of mineral particles.
Key words: titanaugite; ilmenite; surface potential; particle size; surface wettability
