Operation and performance of the Sishen jig plant

摘要

abstract_textpSishen Iron Ore Mine previously used only A-grade material (60 Fe in situ value) from the pit for beneficiating in the DMS plant to a final product grade of 66 Fe in lump and 65 Fe fine ore. The B-grade (between 50 and 60 Fe) and C-grade material (between 35 and 50 Fe) were stockpiled separately, owing to the inability of the existing DMS plant to beneficiate material at densities higher than 3600 kg/m(3). The ability to beneficiate the B-grade material at densities higher than 3600 kg/m(3) was evaluated, and air-pulsed jigs were found to be techno-economically feasible and value maximizing./ppThe beneliciation of B-grade material would add to the existing DMS production of 28 Mt/a, with no additional mining cost and only limited costs for the handling of waste and B-material. The objective of the Sishen Expansion Project (SEP), i.e. the jig plant, was to produce 10 Mt/a of saleable product with six modules to the set physical and chemical specifications by 2009./ppDuring the start of construction, it was decided to add another two jig modules to the plant to increase production to 13 Mt/a. During commissioning and ramp-up the shortcomings and advantages of the jigs were fully experienced and understood, resulting in many changes to optimize jigging performance../p/abstract_text