A spiral concentrator was found to be an effective density separating device in the secondary milling circuit for UG 2 ore after desliming with a hydrocyclone. The spiral concentrator produced a relatively pure silicates and chromite fraction for separate ball milling. Separate milling of UG 2 ore was found to significantly reduce the chromite entrainment during secondary rougher flotation . Most of the milling energy was re distributed to the silicates ball mill without a drop ...
In our iron concentrator plant we use a wet ball mill for grinding of fresh feed. It operates in a close circle with hydrocyclones. The overall data of ball mill and hydrocyclones are following: Ball mill: F80: 4 mm. Diameter: 5.5 m. Length: 10.5 m. Make up regime of ball charge: sizes 40 and 60 mm with equal ratio. Hydrocyclone:
ﬂotation while keeping chromite as coarse as possible. The tailings from the primary ﬂotation are thickened and sepa rated in a hydrocyclone, and the hydrocyclone underﬂow is fed to the secondary open circuit ball mill. The feed to the secondary ball mill usually comprises of large amounts of lib
If a ball mill contained only coarse particles, then 100% of the mill grinding volume and power draw would be applied to the grinding of coarse particles. In reality, the mill always contains fines: these fines are present in the ball mill feed and are produced as the particles pass through the mill.