Abstract: Based on the process mineralogical study of the run-of-mine ore in the concentrator of Luzhong Metallurgy & Mining Group Corporation, the main factor affecting the iron recovery is found to be the oxide ore and magnetite intergrowth particles. In order to recover the iron ore resource, JLSW 200 disc permanent magnetic separators were installed to recover the iron from the concentrator tailings, which has achieved preliminary effect. Tests were carried out on the concentrate recovered from the tailings by regrinding and re-concentration process. The results show that at a grinding fineness of 85% -0.076mm, an iron concentrate grading 60.32% can be obtained, attaining the aim of effective recovery of iron ore resource and improvement of the economic benefit.

Key words: Re-concentration of tailings, Regrinding and re-concentration, Disc permanent magnetic separator