矿产保护与利用2023，Vol.43Issue(6)：79-85,7.DOI:10.13779/j.cnki.issn1001-0076.2023.06.009
海藻酸钠强化油酸钠浮选分离白钨矿与方解石的第一性原理研究
First-principles Study on Sodium Alginate Enhanced Sodium Oleate for Flotation Separation of Scheelite and Calcitee
摘要
Abstract
Flotation separation of scheelite and calcite has been a hot research topic.The effect of sodium alginate on the flotation separation of scheelite and calcite in a sodium oleate system was investigated,Density functional theory was used to establish three adsorption models of water-mineral,sodium alginate-mineral,and sodium oleate-mineral,respectively compared the differences in adsorption energy.The results of the study showed thatwhen the dosage of sodium oleate was 50 mg/L,sodium algina was 10 mg/L,and the pH = 9,the recovery of calcite could be controled to 5.20%,while the recovery of scheelite could reach to 83.20%,which showed a significant effect.The molecular simulation results indicated that sodium alginate adsorped on both surface,but the adsorption energy of calcite was stronger than scheelite.After adsorption of sodium alginate,the adsorption energy of sodium oleate on calcite was 43.20 kJ/mol,the adsorption energy of sodium oleate on scheelite was-136.32 kJ/mol.The results demonstrate alginate can selectively inhibit calcite in sodium oleate without affecting scheelite,The AFM image observed also confirmed that a large amount of sodium alginate was adsorbed on the surface of calcite,also provided constructive advice for the separation of scheelite and calcite.关键词
白钨矿/方解石/海藻酸钠/第一性原理/原子力显微镜Key words
scheelite/calcite/sodium alginate/first principles/AFM分类
矿业与冶金引用本文复制引用
王森,梁栋,卜显忠,宛鹤,薛季玮,张崇辉,宋学文..海藻酸钠强化油酸钠浮选分离白钨矿与方解石的第一性原理研究[J].矿产保护与利用,2023,43(6):79-85,7.基金项目
陕西省重点研发计划国际合作项目-重点项目(2021KWZ-16) （2021KWZ-16）
