Method for purifying powdered iron from steel-smelting sewage sludge coarse grain
A technology of steelmaking sludge and coarse particles, which is applied in the improvement of process efficiency, recycling technology and other directions, can solve the problems that metal iron cannot be effectively used and wasted, and achieves improved utilization value, short process and good effect. Effect
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[0024] This embodiment is a method for purifying iron powder from steelmaking sludge coarse particles, which includes the following steps in turn:
[0025] a. Magnetic separation;
[0026] The coarse particles of steelmaking sludge are magnetically separated in a magnetic separator with a magnetic field strength of 280-320mT;
[0027] Coarse particles of converter steelmaking sludge contain about 30% metallic iron (MFe). Due to the particularity of its production, the particle surface is severely oxidized and contains a lot of impurities. The coarse particles of converter steelmaking sludge are mixed with water in the mixing drum, and then pumped to the wet magnetic separator with mortar, and magnetic separation is performed under the condition of a magnetic field strength of 280-320mT to remove non-metallic impurities, and the metal of the raw material can be separated. Iron MFe increased from 30% to about 50%.
[0028] b. Ball milling;
[0029] Then the magnetically separ...
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