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用凝胶渗透色谱法(GPC)研究了人工合成高聚物磺化聚丙烯酰胺(PAMS)在微细粒钛铁矿和长石上的吸附特性及它们的絮凝行为;用光电子能谱(ESCA)和分子轨道(MO)理论研究了絮凝剂PAMS与钛铁矿和长石的作用机理;并根据絮凝剂与矿物作用的差别进行了微细粒钛铁矿、钒钛磁铁矿、长石矿料的絮凝分离试验. PAMS在矿物表面上的吸附量与其平衡浓度有线性关系.吸附量随平衡浓度增加而增加.在钛铁矿上的吸附量及吸附量强度均比长石大.分子轨道理论分析和光电子能谱证实PAMS的磺酸基在钛铁矿表面与过渡金属离子形成络合物;而在长石上是弱氢键作用. 采用一种新的工艺流程:选择性混合絮凝-磁选-超声波解絮凝-磁选可从含20.35％TiO_2及29.7％Fe的物料中选出钛铁矿精矿和钒钛磁矿精矿,品位分别为42.12％TiO_2,58.10％Fe;回收率相应为83％及90％.
The adsorption properties and their flocculation behaviors of synthetic sulfonated polyacrylamide (PAMS) on fine ilmenite and feldspar were studied by gel permeation chromatography (GPC). The photoelectron spectroscopy (ESCA) and The mechanism of flocculant PAMS with ilmenite and feldspar has been studied theoretically by molecular orbital (MO) theory. According to the difference of flocculants and minerals, the effects of flocculant and ilmenite on vanadium titanomagnetite, vanadium titanomagnetite, Flocculation separation experiment.The adsorption capacity of PAMS on mineral surface has a linear relationship with the equilibrium concentration.The adsorption capacity increases with the increase of equilibrium concentration.The adsorption capacity and adsorption strength of ilmenite are larger than that of feldspar.Molecular orbital theory analysis And photoelectron spectroscopy confirmed that the sulfonic acid groups of PAMS formed complexes with transition metal ions on the surface of ilmenite and weak hydrogen bonds on feldspar.The new process was used: selective mixed flocculation-magnetic separation- The ultrasonic deflocculation-magnetic separation can pick ilmenite ore and vanadium-titanium magnetic ore concentrate from the materials containing 20.35% TiO 2 and 29.7% Fe with the grades of 42.12% TiO 2 and 58.08% Fe, respectively; the recovery rate is 83 % And 90%.