Iron ore fine grain electrification at the Wabush plant in Canada

First iron ore crushing, grinding and reselection (particle size -0.6mm0), gravity concentrate after further drying using electrostatic separation choice to give ultrapure concentrate. The equipment used is the American Carpco industrial production type electric separator (58 sets). The process flow and mineral processing index are shown in Figure 1.


Figure 1 Production flow chart of Wabush plant in Canada

According to the process, the processing capacity is 850 tons per hour, and it is currently the largest concentrator in the industry. After electro-election, the grade of iron concentrate is increased from 65% to 67.5%, and the content of SiO 2 in concentrate is reduced to 2.25%. Electro-election is the most effective method to reduce SiO 2 . It is advantageous to use electricity to remove 50% of SiO 2 because it can save coke , energy, labor and other auxiliary materials, and can also increase the utilization factor of the blast furnace. It is undeniable that the drying of raw materials also requires energy, but the cost of the plant has been reduced by 25% from various aspects (including concentrate transportation, etc.).

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