FD在微细粒黑钨矿表面的吸附机理

Adsorption Mechanism of FD on Fine Wolframite Surface

运用扫描电镜图像、红外光谱分析及吸附量测定等手段,系统地研究选择性絮凝剂FD在微细粒黑钨矿颗粒表面的吸附作用。在黑钨矿颗粒表面,Fe^(2+)的晶体场稳定能大于Mn^(2+),是较迟钝的离子,Mn^(2+)活性较强。FD在微细粒黑钨矿颗粒表面形成特性吸附,FD可使微细粒黑钨矿和磁铁矿形成致密而稳定的复合聚团。分散剂(NaPO_3)_6不影响FD在黑钨矿表面的吸附,磁铁矿对FD的吸附量则随(NaPO_3)_6用量的增加而减小。

The adsorption mechanism of selective flocculant FD on the surface of fine wolframite is systematically investigated by means of crystal structure analysis, scanning electrical mirror image and infrared spectrum analysis and adsorption measuring. On the surface of fine wolframite, the crystal stabilization energy of the Fe2+ is greater than that Mn2+ , so Mn2+ is more active than Fe2+ . The adsorption of FD on wolframite surface is feature adsorption, and fine wolframite and magnetite can be united to form the dense and stable aggregate under the FD affection. The adsorption of FD on the surface of wolframite is not influenced by dispersant(NaPO3)6, but the adsorption of FD on magnetite is decreased with the increase of the (NaPO3)6 content.