高硫铁精矿反浮选脱硫试验

Test of High Sulfur Iron Concentrate Desulfurization by Reverse Flotation

江西某高硫铜铁矿铁精矿-75μm占72.51%,铁品位仅为62.36%,但含硫高达1.87%,硫主要以磁黄铁矿和黄铁矿的形式存在,磁铁矿与磁黄铁矿、黄铁矿有不同程度的交代、连生或被包裹现象。为解决铁精矿含硫高的问题,进行了反浮选脱硫试验。结果表明,试样在再磨细度为-45μm占70.68%的情况下,采用2次反浮选粗选流程处理,粗选1氟硅酸钠用量为300 g/t、戊基黄药用量为250 g/t、2^#油用量为30 g/t,粗选2氟硅酸钠用量为100 g/t、戊基黄药用量为100 g/t、2^#油用量为10 g/t,最终精矿含铁提高至64.03%、含硫降至0.39%,较好地解决了铁精矿含硫较高的问题。

The iron concentrate produced by a high-sulfur copper ore mine in Jiangxi has a fineness of-75μm accounting for 72.51%,and the iron grade is only 62.36%,but the sulfur content is as high as 1.87%.Sulfur mainly exists in the form of pyrrhotine and pyrite.Magnetite and pyrrhotine or pyrite have varying degrees of metasomatism,continuous growth or trap.In order to solve the problem of high sulfur content in iron ore concentrate,reverse flotation desulfurization test was carried out.The results show that the sample is processed by two reverse flotation rough separation processes with a regrind fineness of-45μm accounting for 70.68%.The rough flotation 1 sodium fluorosilicate dosage is 300 g/t,amylxanthate dosage is 250 g/t,2^#oil dosage is 30 g/t,and the rough flotation 2 sodium fluorosilicate dosage is 100 g/t,amylxanthate dosage is 100 g/t,2^#oil dosage is 10 g/t.The final iron content of the concentrate is increased to 64.03%,and the sulfur content is reduced to 0.39%,which solves the problem of high iron content in the iron concentrate.