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Sun Nov 23

• Magnetization of Weakly Magnetic Mineral by Iron Ions in Slurry: Magnetization in slurry (MIS) of weakly magnetic minerals by iron ions was investigated. The magnetic seeds (strongly magnetic particles) were synthesized by ferruginous chlorides directly in slurry instead of previous preparations of magnetic seeds by finely grinding mineral magnetite or specially synthesizing them separately in an aqueous solution. In this way, the growth of the seeds and their adsorption on the minerals simultaneously take place in the same slurry. That after MIS the recovery of weakly magnetic mineral limonite in a magnetic separator increased means the formation and adsorption of magnetic seeds on the surface of iron mineral limonite. The magnetization effect was evaluated by limonite recovery at a magnetic strength of 3.500 Gs in a magnetic separator. Mineral limonite was properly magnetized in the following slurry condition: molar ratio of Fe3+ to Fe2+ 1:3, slurry temperature of 45 °C and pH 10.5. The selectivity of the magnetization

Sun Nov 16

• Study on New Technique for Advancing Recovery of Micro-sized Hematite by Magnetic Separation: For its surface features, micro-sized hematite is usually difficult to recover by magnetic separation; especially, the existing high gradient magnetic separator in industry can not utilize collecting matrix with thin silky rods for its property of being easily blocked; the lower size limit for recovery of micro-sized weak magnetic minerals is about 0.019mm, some even is 0.037mm. This paper introduces the application of the combined new technique of water-air joint discharging of concentrate and collecting matrix with different diameter silky rods in the field of recovery of micro-sized hematite by high gradient magnetic separator. The commercial test result for recovery of a certain hematite with size about ?0.037mm shows that the recovery can be promoted by 16.8 1% with basically same concentrate grade.

Wed Aug 6

• Metso Minerals: Home site of Metso Minerals - world's leader in rock and minerals processing solutions

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