(中南大學 資源加工與生物工程學院，長沙 410083)
摘 要: 通過單礦物浮選試驗、溶液化學計算、ICP檢測和動電位測試，考察在油酸鈉(NaOl)體系下碳酸根離子、氟離子和硫酸根離子對螢石和方解石可浮性的影響及作用機理。結果表明：當?shù)V漿pH值大于螢石或方解石飽和溶液的pH值(記作pHsat)時，碳酸根離子、氟離子、硫酸根離子能活化螢石或方解石的浮選，當?shù)V漿pH值小于螢石或方解石的pHsat值時，陰離子則能抑制螢石或方解石的浮選；添加三種陰離子并不都能使礦漿溶解的鈣離子沉淀，但可以改變螢石和方解石的溶解行為；陰離子對螢石和方解石可浮性的影響與溶液中鈣離子含量無關，但可能與陰離子在螢石和方解石表面發(fā)生吸附并改變礦物的表面性質有關。
關鍵字: 螢石；方解石；陰離子；浮選
（School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The effects of carbonate, fluorite and sulfate ions on flotation behavior of fluorite and calcite and its mechanism were investigated, using sodium oleate as collector, through micro-flotation experiments, calculations of solution chemistry, ICP and zeta potential tests. The results indicate that when the pulp pH is greater than the pH values of the saturated solutions (pHsat) of fluorite or calcite, the flotation of fluorite or calcite can be facilitated by the addition of the ions; when the pulp pH is less than the pHsat, the flotation is inhibited. The addition of the anions cannot precipitate calcium ions in pulp, but change the dissolution behavior of fluorite and calcite. The influences of the three anions on the flotation behavior of fluorite and calcite is unrelated to the concentration of calcium ions in pulp, however, it may relate to the adsorption of the anions on fluorite and calcite surfaces and change the surface properties of the minerals.
Key words: fluorite; calcite; negative ion; flotation
