关于铁精粉经济合理品位的探讨

福建马坑铁矿主要矿物为磁铁矿，粒度分布广，存在细粒包裹体，直接影响选别回收效果；现有流程具备生产平均品位不小于65%的铁精矿，入磨量和不同矿石类型磁铁矿嵌布粒度是品位波动的主要影响因素；通过经济概算可知，所获得的铁精矿平均品位为65%时较为经济合理，增加超细磨工艺稳定铁精矿品位虽然技术可行，但经济效益较差。

Discussion on the Economical and Reasonable Grade of Iron Concentrate

The main mineral of Makeng Iron Mine in Fujian is magnetite, with a wide particle size distribution and the presence of fine-grained inclusions, which directly affects the separation and recovery effect, the existing process is capable of producing iron concentrates with an average grade of not less than 65%. The grinding volume and the grain size of magnetite inlays of different ore types are the main factors affecting grade fluctuations. According to the economic estimates, it is more economical and reasonable when the average grade of the iron concentrate is 65%. Increasing the ultra-fine grinding process to stabilize the grade of iron ore is technically feasible, but economic benefit is poor.