高铬型钒钛磁铁矿配量增加对氧化球团质量的影响

Effect of the Increasing Percent of High Chromium Vanadium-Titanium Magnetite on Quality of Oxidized Pellets

采取"细磨处理高铬型钒钛磁铁矿"和"以粒度较细的廉价欧控矿代替现场生产用矿"两种优化措施,考察了高铬型钒钛磁铁矿配量增加对氧化球团质量的影响,探索了高铬型钒钛矿在球团原料中配量增加的可行性.结果表明:"细磨处理高铬型钒钛磁铁矿"和"以粒度较细的廉价欧控矿代替现场生产用矿",当高铬型钒钛矿配量40%时,抗压强度分别为2475 N.个-1和2005 N.个-1,膨胀率为19.2%和16%,皆满足高炉生产要求,可实现该矿在原料中配量增加,能达到高铬型钒钛矿预期90万t/年的处理目标.

The two optimization measures including ＂fine grinding high chromium vanadium-titanium magnetite＂ and ＂replacement of the practical production iron ore with cheap finer Oukong powder（imported）＂ were adopted.Effects of the percentage of the addition of the high chromium vanadium-titanium magnetite powder on the quality of oxidized pellets were investigated and the feasibility of adding high chromium vanadium-titanium magnetite powder was explored.Through both optimization methods,when the ratio of high chromium vanadium-titanium magnetite was 40%,the compressive strength was 2 475 N per one and 2 005 N per one,respectively,while the reduction expansion ratio was 19.2% and 16% correspondently.These parameters all met the requirements of the practical blast furnace production.So the increasing percent of high chromium vanadium-titanium magnetite in raw material was achieved and the target of 900 000 tons per year of the iron and steel company was reached.