关键词: 尾矿选铁, 建筑砂, 填海造地

Abstract: In light of the fact that small amount of strongly magnetic iron-bearing minerals exists in tailings of Dashihe Mine and plenty amount of reserves, the recovery process for magnetic iron-bearing minerals from the tailings was studied. As a result, a process consisting of beforehand magnetic-separation and two-section millings and several magnetic separation and re-concentration was adopted, which obtained a concentrate with a grade of 67.32% and a recovery of 18.91% from tailings containing of 11.50% iron. On this basis, experimental research on screening the building sand was carried out, and the process of land production by filling the remnant iron tailings into sea was discussed. 

Key words: Iron separation from tailings, Construction sand, Sea-filling land