This paper present the improvement of flux preparation system of Jinchuan Group Corporation, with focal points addressed to structure, operating principle, commissioning process and adjustment of system parameters of the O-SEPA fine quartz separator. 介绍了金川集团公司熔剂制备系统的改进实践,重点叙述了O-SEPA选粉机的结构、工作原理、调试过程以及系统参数的调整。