【摘要】：遼寧某含硼鐵精礦主要有價(jià)元素為鐵、硼,TFe含量為55.55%,B_2O_3含量為4.22%;鐵主要以磁鐵礦形式存在,硼主要以硼鎂石形式存在,雜質(zhì)礦物主要為蛇紋石和磁黃鐵礦。為實(shí)現(xiàn)該含硼鐵精礦中硼、鐵的有效分離,采用造團(tuán)—金屬化還原鐵—磁選工藝進(jìn)行硼鐵分離試驗(yàn)。結(jié)果表明,制成鐖15 mm×20 mm柱狀體團(tuán)塊的含硼鐵精礦外配過量的還原煤(n(C)∶n(Fe)=2.5),在還原溫度為1 125℃和還原時(shí)間為150 min條件下進(jìn)行焙燒,獲得的焙燒產(chǎn)品鐵金屬化率為88.92%;焙燒產(chǎn)品磨細(xì)至-0.074 mm占65%,在磁場強(qiáng)度為80 k A/m條件下弱磁選后,可獲得鐵品位為92.7%、回收率94.4%的優(yōu)質(zhì)鐵精礦和B_2O_3含量為14.5%、回收率為84.4%的合格硼精礦,實(shí)現(xiàn)了硼鐵的有效分離。
[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，

本文編號(hào)：2223069