Study On Selective Flocculation Desilicon Of Diasporic Bauxite New Method

The aim of this study is to research the diaspric-dauxite selective flooculation process, which includes examining the conceivable effects factors, developing a high selective flocculatant for diaspore selective flocculation process and the reagent designing concepts derive from the difference of the crystal structure and surface properties of diaspore and kaolinite. The dynamical simulation was used to research the elimination of negative effcts of hard water. The influences of new flocculant on kaolinite and diaspore flocculation behaviors and its mechanisms were researched and discussed using settlement test and FTIR. Some research contents are sumerized as follows:At first, the effects of some conditions such as pH value and electrolyte on pure samples settling behavior have been studied. It showed that the diaspore and kaolinite settling rates reached their top value at pH6.8 and pH3.3 respectively. The influence of Inorganic electrolyte to ultrafine particles surface zeta potential, not only is related to the concentration, but also electrolyte ion valence number. A new flocculant AlFlocPro was developed which have highly selectivity to diaspore. Compared with APAM, it played more selectivity and efficiency.Secondly, dispersation, flocculation and some physical and mechanical factors greatly effect on the floccuation process. Hardness of water played a very negative effct on factual mineral due to the Ca²⁺ and Mg²⁺ in the water.Thirdly, FT-IR spectrum of mineral and regent were analysised and the result indicated that the adsorption of AlFlocPro on diaspore and kaolinite is by means of hydrogenolysis and physical effect.Finaly, via dynamical simulation per Ca²⁺ was restricted by one softening agent molecule. That make the Ca²⁺ can not dispersate in water and not settle as aggregation.The research on kaolinite and diaspore crystal structure, disintegration surface, electrically charged mechanism as well as FT-IR analysis, is helpful for the understanding of relation between high polymer structure and its performance, and is beneficial to develop more efficiency techique for diaspore flocculation,...