Title: Method for producing fine powder of magnetite from active iron ore
Application Number: 200610095092 Application Date: 2006.09.05
Publication Number: 1916196 Publication Date: 2007.02.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C22B1/00;C22B1/14;B03C1/00
Applicant(s) Name: Shi Qijie Address:
Inventor(s) Name: Shi Qijie
Attorney & Agent: chu qiang
Abstract:
    This invention discloses a method for manufacturing magnetite concentrate from active iron ore. The method comprised: (1) pulverizing active iron ore, mixing with separation-deoxygenation promoter at a weight ratio of 1: (0.001-0.005), and placing the mixture in an earth kiln or suspended kiln; (2) uniformly heating to 550-850 deg.C to calcine the active iron ore, taking out milling in a ball mill to obtain iron ore slurry; (3) performing magnetic separation by a magnetic separator, precipitating, filtering and drying to obtain magnetite separator, precipitating, filtering and drying to obtain magnetite concentrate. The method has such advantages as low cost and simple process, and can obviously reduce the contents of harmful substances such as S, P, Zn, Na, Cu, Si, crystalline water, Hg and Mg, and increase iron content to higher than 62%. The obtained magnetite concentrate can satisfy corresponding state standards, and can be used to manufacture high-quality steel.
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