Effect Of Metal Cation On Reverse Flotation And Flotation Foam Of Phosphate Ore

Phosphate rock is mainly used to produce phosphate fertilizer.With the development of the society the national demand for phosphate rock is more and more big,but high grade phosphate rock can not meet the needs of citizens.And 90% of phosphate rock belongs to the low grade ore and being difficult to choose,for high silicon magnesia phosphate rock,the simple flotation can’t meet the production requirements,the application of double reverse flotation effectively improve the recycling of phosphate rock.however,cationic collector in reverse flotation face a problem that foam stability,it make concentrate filtering face difficulties.So the article research the presence of metal cation in the pulp effects on foam stability and flotation.In this article,through airflow method to measure foaming height and half-life of different surfactant ether amine in the structure of the glass tube,to calculate its foaming property and foam stability.Inorganic salt electrolyte is added in the experiment to observe the influence of different metal cations on two-phase bubble.the study found the intensity sequence of foaming property is T-609>D-609,stability of law is the same.It will enhance the foam stability when put surfactant in the solution.Inorganic salt ions had a greater influence on the foaming property and stability.In the four kinds of metal cation,the influence of Al³⁺ion is most prominent.through surface tension test found that the presence of ether amine can effectively increase the surface tension of the solution,adding inorganic cations can significantly improve the surface tension of solution.Through the calculation of surface tension for gas/liquid interface adsorption,it found that the presence of inorganic salts can significantly increase the potion in the gas/liquid interface adsorption quantity.By adding quartz or phosphorite in two foam system,it found that the addition of particles can affect the foam stability,and three-phase foam is more stable than two-phase bubble,the stability of the system of apatite is greater than quartz.Adding the metal cation in three-phase system foam system,found that the stability of three-phase foam first increases then decreases with the concentration of metal ions.The grinding fineness of-0.074mm accounts for 80 percent of quartz and collophane,it finds that T-609 and D-609 on quartz has more strong ability of collecting than collophane.Meanwhile the addition of metal cation will significantly affect the floatation result.The existence of Al³⁺and Fe³⁺ions will inhibit the flotation of quartz.Through the activity of quartz surface,Ca²⁺ions improve the recovery rate of quartz.by Zeta potential test,it found that the presence of the collector makes the Zeta potential on the surface of the quartz and collophane significant positive move,Through chemical analysis,the composition of influencing separation of quartz and collophane is mainly CaOH⁺,MgOH⁺,Al（OH）₄^-,Fe（OH）_3sions.