Process Optimization of Strong Magnetic Separation of Coarse Grain on Midi Titanium Plant

In order to solve the problem of high flotation cost and small particles size of TiO₂, the optimization study of strong magnetic separation technology was carried out for one stage of high magnetic separation concentrate with a grade of 16.94% of TiO₂. The test results showed that:0.125 mm sieve was used for classification, and then, the process of "spiral and electric separation" was adopted on oversize product;and mixing floatation was adopted after strong magnetic separation on spiral middings, electricmiddings and coarse slag, finally, a electroselective titanium concentrate with TiO₂ grade 47.67% and recovery 34.25% and a flotation concentrate with TiO₂ grade 47.18% and recovery 34.83% were obtained, that is, the mixed titanium concentrate with TiO₂ grade of 47.42% and recovery of 69.08%. The process optimization not only reduces the amount of grinding, but also optimizes the final product's particle size, and providing theoretical support for industrial production.