硫酸渣磁铁精矿球团试验研究  

Study on Pelletizing of Magnetite Concentrate from Pyrite Cinder

作　　者：朱德庆[1] 李建[1] 潘建[1] 徐小锋[1] 翟勇[1] 唐艳云[1] 崔瑜[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《矿冶工程》2006年第6期49-52,共4页Mining and Metallurgical Engineering

基　　金：中南大学创新工程资助项目(1343-75213)

摘　　要：对某地低品位硫酸渣经还原焙烧-磁选所得磁铁精矿进行了球团试验研究,结果表明,该磁铁精矿添加1.5%的湖泗膨润土,在造球时间10 m in、生球水分16.8%的条件下,得到生球落下强度5.3次/0.5 m、抗压强度31.55 N/个、爆裂温度435℃的良好指标;球团在预热温度900℃、预热时间10 m in、焙烧温度1 200℃、焙烧时间15 m in的条件下固结,成品球团抗压强度可到达2 871N/个,还原度为83.38%,还原膨胀指数为17.86%,低温还原粉化指数RD I-3.156.12%。研究结果证明,使用该磁铁矿完全能生产出可供高炉使用的优质氧化球团,既扩大了钢铁企业原料来源,又综合利用了硫酸渣中的铁资源,具有重大的环保效益。Pelletizing of a magnetite concentrate obtained from reduction roasting and magnetic separation with the low - grade pyrite cinder as the raw material was experimentally studied. In the presence of 1. 5% Husi bentonite and 16.8% moisture, and after a balling duration of 10 rain, the drop number and compressive strength of green balls can reach 5.3 times from a height of 0.5 m and 31.55 N per pellet, respectively, while thermal shock temperature achieved 435 ℃. After drying, green balls were preheated at 900 ℃ for 10 minutes and fired at 1 200 ℃ for 15 minutes, the compressive strength reached 2 871 N per fired pellets. Reduction index, reduction swelling index and RD1-3.15 of fired pellets were 83.38%, 17.86% and 6.12%, respectively. It was proved that using this magnetite concentrate, high quality oxidized pellet can be produced as a blast furnace feed. This technology will benefit steel mills by providing more options for iron- bearing raw material sourcing, meanwhile, the iron resource in pyrite cinder can be comprehensively utilized, which is of significant value for environmental protection.

关 键 词：硫酸渣 磁铁精矿 球团矿 综合利用 

分 类 号：TF046[冶金工程—冶金物理化学]