钛铁矿与捕收剂SYB^(2#)的作用机理探究  

Study on the Mechanism of the Effects between Imenite and Collector SYB^(2#)

作　　者：王其宏[1] 章晓林[2] 李康康[2] 武鲁庆 

机构地区：[1]昆明理工大学有色资源利用国家重点实验室,云南昆明650000 [2]昆明理工大学国土资源工程学院,云南昆明650000

出　　处：《矿产综合利用》2017年第2期117-122,共6页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金项目(51204078)资助

摘　　要：本试验以攀枝花的选铁尾矿作为试验原矿,采用SYB^(2#)(一种羟肟酸类药剂)为捕收剂进行浮选试验。结果表明,在SYB^(2#)用量为733.33 mg/L,pH为5.0(H2SO4和NaOH为调整剂)的条件下,钛铁矿回收率达到最大值81.9%。通过SEM-EDS、XPS和Zeta电位分析等测试手段探究了捕收剂SYB^(2#)与钛铁矿之间的作用机理。EDS能谱元素半定量分析结果表明,O原子浓度由47.83%上升到56.77%,C原子浓度由27.60%下降到20.93%,说明SYB^(2#)在矿物表面产生了吸附作用;由XPS分析发现,O、Ti和Fe的化学位移分别为0.26e V、0.14eV和0.18eV,说明SYB^(2#)与这些元素均发生了作用;Zeta电位分析表明,矿浆pH值高于零电点时,羟肟酸根离子仍可吸附在矿物表面,同时钛铁矿回收率在零电点附近达到最大值(此时矿物表面因吸附Fe(OH)^+、Fe(OH)_3^-、Ti(OH)_4等离子而不显电性),说明SYB^(2#)与钛铁矿之间的作用应为化学吸附。结合相关研究及本文XPS分析,在以H_2SO_4作调整剂的情况下,可能还存在SO_4^(2-),HSO_4^-对矿物的特殊吸附。Iron tailings in Panzhihua were chosen to be the testing ore in this flotation test when SYB2#, a kind of hydroximic acid was used as collectors. The results show that, the recovery of ilmenite reached the maximum value of 81.9% when the dosage of SYB2＋ is 733.33 mg/L, pH = 5.0 （ H2SO4 and NaOH were used as pH modifier）. The mechanisms between SYB2＋ and ilmenite were measured by SEM-EDS,XPS and Zeta potential. Oxygen atom con- centration was increased from 47.83% to 56.77%, carbon atom concentration was decreased from 27.60% to 20.93% ,which is determined by semi-quantitative analyses of EDS. XPS results suggest that the chemical shift of O, Ti and Fe were 0. 26 eV,0. 14 eV and 0. 18 eV respectively, both of which indicate that SYB2# played a role with elements mentioned above. Meanwhile, the analysis of Zeta potential shows that interaction mechanism between SYB1# and ilmenite is chemical adsorption, because hydroxamic acid ions can adsorb on the mineral surface when the pH value of pulp is higher than the zero point of charge, and recovery rate of ilmenite reached the maximum val- ue and the surface of the mineral is not electrically characterized by adsorption of Fe （OH） ＋, Fe （OH） 3-, Ti （OH） 4 at this time. Moreover,there may also be special adsorption of SO4^2- ,HSO4- on minerals when H2SO4 is used as the regulator by combined with related research and XPS analysis in this paper.

关 键 词：钛铁矿 SYB2# 作用机理 

分 类 号：TD951[矿业工程—选矿]