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Along with our country steel industry developing rapidly, Need to depend on technique progress, try our best to explore present iron mine resources, particularly, explore complications mine which separate diffcultly,we can’t explore with current technique, increase repertory and increase efficency. Explore the potential production, raise the self-sufficient rate, alleviate pressure of importing iron ore, maintin stability, abundant quantity, superior quality of iron ore raw material’s supplying, guarantee steel industry keep a stable development.With YunNan height phosphorus haematite, the limonite bring out a problem and cross-examine in court descending studying a marriage partner miscellaneous miscellaneous, the experiment having carried out a series studies:(1) Mineralogy studies the secondary handicraft starting off, the experiment having carried out a series studies. Have made a thorough investigation of iron in ore is that the form with haematite and the limonite outputs mainly. That ore Fe grade is 35.55%, P contents are 0.88%. Most haematite is form with micro scalelike in the limonite.The limonite composition mainly are goethite, lepidocrocite, goethite and other water-amorphous silica, very fine mechanical mixing. The phosphate mainly in the form of isomorphism is found in the limonite, the distribution of phosphorus in the limonite accounted for 85.9% of total phosphorus. Another 14.1% of output in the form of Collophane, Collophane is disseminated mechanical mixing of materials found in limonite.(2) By the fact that weak magnetism of run of mine chooses an experiment, strong magnetism of run of mine chooses an experiment, the run of mine is opposing flotation, deoxidation torrefaction-magnetism elects, chlorinating separation-magnetism elects, the acid leaching-magnetism selections-soaks deoxidation, the magnetism baking-magnetism selections-opposing the flotation experiment, reaching deoxidation torrefaction chooses deoxidation acid leaching effect, economy feasibility is all fairly good. (3) The condition carrying out deoxidation torrefaction by the fact that the selections baking magnetism to deoxidation acid lesching tests a problem, condition and technological process that magnetism chooses test that, the magnetism deoxidation is baked-chooses a selected mine acid lesching condition and technological process testing that the selections testing condition, reaching a run of mine baking magnetism course restoring acid lesching handicraft finding out the best. The run of mine breaks to pieces～C till 3 mm the following queens, in 950, the reducer is that coke (size-1+0.5 mm following) dosages are 8%, restore baking time is 25 mins, the run of mine restores to 200 eyes account for 90% baking queen segment of mill ore, By that weak magnetism electing,the grade is 54.72%, contains the phosphorusl.08% or so iron selected mine.magnetism chooses a selected mine being acid leach, Leaching temperature is 40℃, leaching concentration (H2SO4) is 10.00%, acid consumption—liquid-solid ratio is 2.5:1, leaching time isl5min. the selected mine Fe grade is 58.40～59.68%, P contents are0.255～0.273%, coefficient of recovery> 70%’s index.
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