Experiment on High-efficiency and Energy-saving Beneficiation Process of Jinchanghe Iron Ore in Yunnan
In order to rationally develop and utilize the iron ore with total iron grade of 30.47％ in Jin-changhe Iron Mine,Yunnan Province,and determine an effective beneficiation process,aiming at the prob-lem that the useful iron minerals in the ore are finely disseminated and closely associated with gangue miner-als,which makes it difficult to efficiently discard the ore,a high-pressure roller mill ultra-fine crushing and selective crushing technology was introduced in the crushing process,and a comparative test was car-ried out with the conventional crushing(-10 mm)wet magnetic separation pre-concentration and tailings dis-carding process.The test results show that under the condition of similar magnetic iron recovery rate,the amount of tailings thrown by the high pressure roller mill-wet pre-concentration process is obviously im-proved.The high pressure roller mill-wet pre-concentration concentrate adopts two stage grinding-single magnetic separation process and two stage grinding-magnetic separation-magnetic separation column pro-cess respectively,and the final separation indexes are similar.Based on the goal of reducing cost,increas-ing efficiency and energy saving and emission reduction,the high pressure roller mill-wet magnetic separa-tion-two stage grinding-magnetic separation-magnetic separation column separation process is recommend-ed as the principle beneficiation process of the iron ore.
iron orehigh pressure roller millwet pre-concentrationmagnetic separation column
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