This plant at our client’s site is mixed ore with magnetite and hematite, the main valuable mineral is magnetite and hematite. TFe grade is 31%, magnetic Fe occupancy is 45%. Gangue mineral is quartz, feldspar. Process capacity is 200,000t/a. Crushing process operability is 65%, grinding process operability is 80%. Crushing process output size is <20mm, griding process output size is <200mesh(80%). Crushing process capacity is 35.12t/h, grinding process is 28.5t/h.
We use two step with one closed circuit crushing, one closed circuit grinding. Low magnetic, high magnetic and gravity unite flow chart.
Main machines including jaw crusher, cone crusher, vibrating screen, overflow type ball mill, spiral classifier, low magnetic separator, trommel screen, SLon Magnetic separator, 6-s shaking table.
The general layout drawing is designed as detailed site survey, rational utilization of the terrain, using process optimization design, the total investment is controlled in USD750,000. The whole plant has 4 steps, first step for stocking raw ore and installing grizzly. Second step for installing low magnetic separator, high magnetic separator and shaking table gravity separator. Fourth sept for installing concentrate setting pond. The whole plant designed reasonably, Basically achieved automatic ore slurry flows, near flow chart and concentrated equipments, it is convenient for operation and maintenance in production process.
This plant recoveries Magnetite and Hematite successfully, capacity is about 32t/h. Concentrate grades reach to 65%, tailings grade controlled in 10%, Fe recovery is higher than 80%, Basically realized capacity and grade, achieved good results.