含硼铁精矿用于巴润精矿氧化球团生产的实验研究

在实验室条件下,研究了含硼铁精矿对巴润精矿氧化球团制备工艺及冶金性能的影响.研究表明:球团原料中外配5.0%的含硼铁精矿,可将混合料中的巴润精矿配比(质量分数)提高到40%,制备的氧化球团满足高炉冶炼要求;含硼铁精矿可增加巴润精矿氧化球团的抗压强度和降低还原膨胀率,并可降低球团的焙烧温度;当含硼铁精矿配加量(质量分数)从0增加到7.5%时,球团抗压强度从2 630 N·个-1上升到3 709 N·个-1,还原膨胀率从25.69%降低到15.53%;外配质量分数为7.5%的含硼铁精矿时,球团的焙烧温度可从1 200℃降低至1 150℃,巴润精矿氧化球团满足高炉生产要求.

Experimental Study on Preparation of Oxidized Barun Iron Ore Pellets with Boron-Bearing Iron Concentrate Addition

Under laboratory conditions， experiments on the effect of boron-bearing iron concentrate on the preparation process and metallurgical properties of oxidized Barun iron ore pellets were carried out. The results show that， when the additional addition of boron-bearing iron concentrate is 5.0%， the oxidized iron ore pellets with 40% Barun iron ore content can meet the requirements of blast furnace smelting. Boron-bearing iron concentrate can increase the crushing strength of pellets and decrease the reduction swelling rate. With increasing the additional addition of boron-bearing iron concentrate from 0 to 7.5%， the crushing strength is raised from 2630 N to 3709N， the reduction swelling rate is decreased from 25.69% to 15.53%. When the additional addition of boron-bearing iron concentrate is 7.5%， the pellets roasting temperature can be decreased from 1200℃ to 1150℃， and the quality of the oxidized Barun iron ore pellets can still meet the requirements of blast furnace smelting.