中南大学学报（自然科学版）2024，Vol.55Issue(6)：2074-2083,10.DOI:10.11817/j.issn.1672-7207.2024.06.002
木质素磺酸钠在锂辉石与脉石矿物低碱度浮选分离中的作用
Effect of sodium lignosulfonate in flotation separation of spodumene and gangue minerals with low alkalinity
摘要
Abstract
The effects of sodium lignosulfonate on the floatation and separation behavior of spodumene,feldspar and quartz were studied using oleic acid/dodecyl trimethyl ammonium chloride(quaternary ammonium)as a cationic and anion collector at the natural pH of 8-9.The action mechanism of the agent was discussed by means of contact angle test,adsorption capacity test,infrared spectrum analysis and density functional theory(DFT)calculation.The results show that sodium lignosulfonate has obvious selectivity on the inhibition of three minerals,and it is an effective depressant for the flotation separation of spodumene and gangue minerals under low alkalinity conditions.The adsorption capacity of sodium lignosulfonate on the surface of quartz,spodumene and feldspar are reduced sequentially.There is competitive adsorption between oleic acid/quaternary ammonium and lignosulfonate on spodumene,feldspar and quartz.The adsorption of oleic acid/quaternary ammonium on spodumene is stronger than that on lignosulfonate,but weaker than that on feldspar and quartz surface.Therefore,as a highly efficient organic depressant,sodium lignosulfonate plays an important role in the low basicity flotation of spodumene and gangue minerals.关键词
锂辉石/浮选/低碱度/有机抑制剂/密度泛函理论Key words
spodumene/flotation/low alkalinity/organic depressant/density functional theory分类
矿业与冶金引用本文复制引用
崔曼,胡阳,邓朝政,王毓华,卢东方,郑霞裕..木质素磺酸钠在锂辉石与脉石矿物低碱度浮选分离中的作用[J].中南大学学报（自然科学版）,2024,55(6):2074-2083,10.基金项目
国家重点研发计划项目(2021YFC2903202) （2021YFC2903202）
国家自然科学基金资助项目(52174267,51674290)(Project(2021YFC2903202)supported by the National Key Research and Development Plan of China （52174267,51674290）
Projects(52174267,51674290)supported by the Natural Nature Science Foundation of China （52174267,51674290）
