Study On The Mechanism Of Magnetization Treatment On Fluorite Flotation

As a strategic resource in China,fluorite is widely used in chemical,building materials and metallurgy.With the development of industry,the demand for fluorite quality is getting higher and higher.The cost of developing new pharmacy is high.It is necessary to study new flotation process to improve fluorite flotation index.The results of some studies have shown that magnetization can improve the fluorite concentrate grade and flotation recovery rate,but the test subjects are based on actual minerals,and there are still many needs to verify and explore the mechanism of magnetization treatment.In this paper,fluorite and quartz are used as research objects to explore the effects of different magnetic field strength and magnetization time on the flotation of fluorite and quartz pure minerals under three magnetization modes: magnetized water,magnetized pulp and magnetized chemicals.And through the Zeta potential,adsorption amount test,Infrared spectroscopy test,and the sodium oleate solution chemical calculation and the influence of magnetized water on the pH value of aqueous solution,the mechanism of magnetization treatment on the flotation behavior of fluorite and quartz pure minerals was analyzed.The adsorption of the agent on the mineral surface is visualized by atomic force microscopy.The main research contents and test results are as follows:The results of pure mineral flotation test show that under these three magnetization modes,the order of improvement of fluorite pure mineral flotation recovery rate is:magnetization agent > magnetized water > magnetized pulp.After the magnetization treatment,the flotation recovery rate of fluorite pure minerals increased remarkably,while the flotation recovery rate of quartz pure minerals decreased significantly.Under the same magnetic field strength,the better action time of the three magnetization modes is: magnetized water,magnetized pulp for 30 min,and magnetization agent for10 min.Under the same magnetization time,the better magnetic field strength under the three magnetization modes is 200 mT.The Zeta potential?adsorption amount test and infrared spectrum showed that after the magnetization treatment,the surface potential of the fluorite after the action with sodium oleate was lowered,and the surface potential of the quartz after the action withsodium oleate was increased.Magnetization promotes the adsorption of sodium oleate on the surface of fluorite.In the three magnetization modes of magnetized water,magnetized pulp and magnetized agent: the adsorption amount of sodium oleate on the surface of fluorite increased by 5.43%~14.53%,3.77%~11.52%,7.37%~19.71%;meanwhile,magnetization Treatment inhibits the adsorption of sodium oleate on the quartz surface.In the three magnetization modes of magnetized water,magnetized pulp and magnetized agent: the adsorption amount of sodium oleate on the surface of quartz decreased: 11.14%~34.58%,4.98%~29.78%,21.66%~46.65%.The characteristic peaks of sodium oleate adsorption on the surface of fluorite did not change before and after magnetization treatment.Atomic force microscopy experiments showed that the morphology of the mineral surface changed significantly before and after the mineral surface was added.The magnetization treatment increases the thickness of the adsorption layer of sodium oleate on the surface of the fluorite,and reduces the thickness of the adsorption layer of sodium oleate on the surface of the quartz.Before and after magnetization treatment,the thickness of the adsorption layer of sodium oleate on the surface of fluorite increased from 2.45 nm to 8.90 nm,and the thickness of the adsorption layer of sodium oleate on the surface of quartz decreased from 0.45 nm to 0.17 nm.