油酸钠浮选体系中蛇纹石对菱镁矿浮选的影响

讨论了在油酸钠浮选体系中菱镁矿、蛇纹石以及石英的浮游特性，蛇纹石对菱镁矿可浮性的影响，不同粒级蛇纹石对不同粒级菱镁矿可浮性的影响，蛇纹石对菱镁矿和石英混合矿浮选的影响并探讨了其机理.结果表明，不同粒级蛇纹石对不同粒级菱镁矿的影响不同，蛇纹石对菱镁矿的浮选起到很强的抑制作用，由矿物溶解组分图和扫描电镜分析可知，这主要是由于蛇纹石溶解性较强，溶解的离子具有较强的亲水性，并且易与菱镁矿表面暴露的Mg2+，O2-结合，从而使菱镁矿表面亲水性增强，同时减少了菱镁矿表面离子与油酸钠的结合，从而对菱镁矿起到抑制作用.

Influence of Serpentite on Flotation of Magnesite in Sodium Oleate Flotation System

In the flotation environment with sodium oleate as collector， the floatability of magnesite， serpentine and quartz， the influence of serpentine on the floatability of magnesite， various particle fractions of the serpentine on the floatability of magnesite with different size range， and the influence of serpentine on the mixture of magnesite and quartz were researched and the mechanism was discussed. The results showed that the serpentine with different size range had individual effect on the floatability of magnesite with different grades and serpentine had strong inhibition effects on the flotation of magnesite. According to the mineral dissolved component diagram and SEM results， this was mainly because the dissolubility of the serpentine solution was relatively high， the ions of serpentine solution had relatively strong hydrophilicity which were easy to reunite with the Mg2+ and O2- ions on the surface of magnesite， that led to the increase of hydrophilicity of magnesite and decrease of the chance of sodium oleate attached on the surface of magnesite and therefore depress the floatability of magnesite.