辽宁某含硼铁精矿造团—金属化还原铁—磁选试验

发布时间：2018-09-04 19:02

【摘要】：辽宁某含硼铁精矿主要有价元素为铁、硼,TFe含量为55.55%,B_2O_3含量为4.22%;铁主要以磁铁矿形式存在,硼主要以硼镁石形式存在,杂质矿物主要为蛇纹石和磁黄铁矿。为实现该含硼铁精矿中硼、铁的有效分离,采用造团—金属化还原铁—磁选工艺进行硼铁分离试验。结果表明,制成鐖15 mm×20 mm柱状体团块的含硼铁精矿外配过量的还原煤(n(C)∶n(Fe)=2.5),在还原温度为1 125℃和还原时间为150 min条件下进行焙烧,获得的焙烧产品铁金属化率为88.92%;焙烧产品磨细至-0.074 mm占65%,在磁场强度为80 k A/m条件下弱磁选后,可获得铁品位为92.7%、回收率94.4%的优质铁精矿和B_2O_3含量为14.5%、回收率为84.4%的合格硼精矿,实现了硼铁的有效分离。
[Abstract]:The main valuable element of a boron-bearing iron concentrate in Liaoning is iron, the content of TFE in boron is 55.55 and the content of B _ 2O _ 3 is 4.22. Iron mainly exists in the form of magnetite, boron is mainly in the form of boromite, and the impurity minerals are serpentine and pyrrhotite. In order to realize the effective separation of boron and iron in the iron concentrate containing boron, the boron-iron separation experiment was carried out by means of agglomeration metallization reduction iron-magnetic separation process. The results show that the addition of excess (n (C): n (Fe) _ (2. 5) of boron ferric concentrate to 15 mm 脳 20 mm columnar block is roasted at a reduction temperature of 1 125 鈩，

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