| The storage capacity of hematite in our country is up to 200 tons which involved fine particle arrangement 65.3% and has not been explored and developed effectively for a long time. Oolitic hematite arrangement particles are fine and grinding ore- strong magnetism- anti-flotation ore tailing of a routine chain stage is 37.55% as well as percentage loss of iron is 46.18%. To enhance the recovery ratio of iron mineral, the dissertation investigates the nature of mineral sample and discusses selective flocculation of traditional mineral separation methods and new mineral separation means which is called selective flocculation. Finally it determines to integrated recover the fine particles product by flocculation- strong magnetism selectivity process.The experiment is conducted by affecting fine hematite particle de-concentration, each element of flocculation and each condition of strong magnetic. Iron recovery rate improved 28.29% and the loss of iron in the tailing decreased 24.96% by flocculation strong magnetic rough concentration and scavenger once and operation recovery rate of iron preparation concentrate can be got 60.44%, pure 56.07% in the ore pulp consistency 17%, ore pulp temperature 18℃, ore pulp PH=11, dispersant agent sodium silicate 800g/t, stir impeller rotational speed 750r/min after adding in dispersant sodium, floc amylum 200g/t, stir impeller rotational speed 40r/min after adding in Floc amylum, strong magnetic density 15000 Oersted (1194.27kA/m), sorter receptacle tip gap 0.15mm, strong magnetic concentration flush water 600mL/order.The research provides new technical route for effective use of fine particle hematite, and provides foundation of our country's fine particle hematite mine enterprise technical innovation, additionally brings enormous economic profit.
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