亚硝基苯胲铵在金红石表面的吸附机制及其对浮选行为的影响  

Adsorption mechanism of cupferron on rutile surface and itseffect on flotation behavior

作　　者：肖巍 余俊甫 陈阳 万昕洋 刘剑飞 李宏静 张鹤[1] 杨娟 高碧荷 XIAO Wei;YU Junfu;CHEN Yang;WAN Xinyang;LIU Jianfei;LI Hongjing;ZHANG He;YANG Juan;GAO bihe(School of Resources Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Baogang Group Mining Research Institute Co.Ltd.,Baotou 014000,China;Shanyang Qinding Mining Co.Ltd.,Shangluo 726403,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055 [2]包钢集团矿山研究院(有限责任公司),内蒙古包头014000 [3]山阳秦鼎矿业有限责任公司,陕西商洛726403

出　　处：《中南大学学报（自然科学版）》2023年第11期4219-4227,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(52004197);陕西省创新能力支撑计划项目(2023-CX-TD-50)

摘　　要：综合考虑矿物表面溶液化学,从亚硝基苯胲胺用量、Zeta电位、接触角试验、红外光谱测试及基团电负性理论计算的角度研究亚硝基苯胲胺在金红石表面的吸附行为。研究结果表明:当pH=6.8且亚硝基苯胲胺用量一定时,金红石浮选回收率可达到81.5%。金红石颗粒表面的Ti—O键断裂后,会造成表面的活性质点在水溶液中发生水化,从而生成羟基化合物Ti(OH)22+、Ti(OH)3+等,而吸附行为主要是与Ti(OH)3+作用的结果。亚硝基苯胲胺能够明显增强金红石表面的疏水性能,且在亚硝基苯胲胺的质量浓度为400 mg/L时,接触角最大,即疏水性最强。亚硝基苯胲胺与金红石表面活性质点发生键合,且与—N—O,—N=O官能团生成了含苯环的络合物;矿物与药剂上O和O键合的可能性最大,且稳定性最强,并生成含苯环的五元环络合物,从而使金红石疏水上浮。The adsorption behavior of cupferron on rutile surface was studied from the perspectives of dosage,Zeta potential,contact angle test,infrared spectrum test and theoretical calculation of group electronegativity by comprehensive consideration of mineral surface solution chemistry.The results show that the recovery rate of rutile reaches 81.5%when pH=6.8 and the cupferron dosage is fixed.The fracture of Ti—O bond on the surface of rutile particles will lead to hydration of the active particles on the surface in aqueous solution,thus form hydroxyl compounds.The adsorption behavior is mainly the result of interaction with Ti(OH)+3.The nitrobenzene hydroxylamine can significantly enhance the hydrophobic properties of rutile surface,and at 400 mg/L,the maximum contact angle,namely the strongest hydrophobicity,is obtained.The cupferron is bonded with rutile surface active particles and forms complexes containing benzene rings with—N—O,—N=O functional groups.The possibility of bonding between mineral and reagent O and O is the most likely,and the most stable,and the five-membered ring complex containing benzene ring is formed,so that the hydrophobic rutile floats up.

关 键 词：亚硝基苯胲胺 金红石浮选 五元环络合物 新型环保药剂 

分 类 号：TD923[矿业工程—选矿]