Georgian manganese ore at world market quality due to allmineral’s efforts
At Georgia’s Chiatura mines a complete plant designed by allmineral is helping to process manganese ore to world market quality. With the turnkey processing plant, annual production is set to increase to 700,000 tonnes. Pivotal to the efficient process are two alljig® jigs, one allflux® fluidised bed separator and one allgaus® high-intensity magnetic separator.
The feed material is first conveyed to a drum washer and sized using a vibrating screen. The screen overflow feeds manganese ore with grain sizes in excess of 20 mm to a cone crusher, where it is crushed and then fed once again to the drum washer. The screen underflow is channelled to a finer vibrating screen, classifying the material at 1 mm.
Manganese ore of less than 1 mm is fed to an allflux®-500 fluidised bed separator. The technology used for its flow and control equipment allows the fully automated production of three precisely graded products from a single machine unit. Following up a allgaus® G-2500 high-intensity magnetic separator (WHIMS) separates the paramagnetic minerals from any weak magnetic minerals with up to 18,000 Gauss.
Feed material from the screen underflow with grain sizes between 1 mm and 5 mm is conveyed into an air-pulsed, almost entirely wear-free alljig® F2200x3000 fine jig. Manganese ore with grain sizes between 5 mm and 20 mm is fed from the drum washer via the coarser vibrating screen directly to an alljig® G1700x3000 coarse jig.
The alljig® jigs are a guarantee of extremely precise grading of the feed material – and not just in Georgia due to the easy operated adjustability of the frequency and amplitude of the water pulsation. The processing plant is designed to enrich the manganese content in the products to > 38 wt.-% for a metal yield of > 90 wt.-%.
