Abstract: The paper describes the basic structure and working principles of vertical spiral agitating mill, and highlights its application in the regrinding and re-separation process of iron concentrate. The industrial application has proven that vertical spiral agitating mill is regrinding and fine grinding equipment of excellent performance. The tailings of Hunan Zhizhuyuan non-ferrous metal ore was ground by JM 800B vertical spiral agitating mill to -38 μm 95.10%, and treated by one roughing-two cleaning magnetic separation. An iron concentrate grading 65.20% was obtained, effectively recovering the iron ore resource.

Key words: Vertical spiral agitating mill, Iron concentrate, Regrinding, Fine grinding