某矿山高硫铁矿降硅浮选试验研究

Flotation Test Study on Reducing Silicon Grade of High Sulfur Iron Ore in a Certain Mine

硫铁矿中硅含量过高会对矿石的熔化温度、矿浆的流动性等产生影响,甚至会影响矿渣硬度,增加矿渣回收难度。为降低某矿山硫精矿硅含量,以异戊基黄药为捕收剂,松醇油为起泡剂,进行浮选降硫,将硫铁矿原生矿石及其粗精矿的硅品位分别由7.06%、5.9%降至2.24%、0.56%。加入水玻璃作为调整剂后,精矿硅回收率提高幅度小,精矿硫铁金属回收率提高幅度较大,因此,可选择水玻璃作为调整剂。试验结果可以为该硫铁矿降硅提供参考。

Excessive silicon content in pyrite will affect the melting temperature of ore and the fluidity of slurry,and even affect the hardness of slag and increase the difficulty of slag recovery.In order to reduce the silicon content of sulfur concentrate in a mine,the flotation experiment is carried out by using isoamyl xanthate as collector and pine oil as foaming agent.The silicon grade of pyrite primary ore and its rough con-centrate is reduced from 7.06%and 5.9%to 2.24%and 0.56%respectively.After adding sodium silicate as regulator,the recovery rate of concentrate silicon increases slightly,and the recovery rate of concentrate py-rite metal increases greatly.Therefore,sodium silicate can be selected as a regulator.The test results can provide a reference for the silicon reduction of the pyrite.