100万t链箅机和回转窑设备改造实践

Practice of the 1mt/a Grate-Kiln Pelletizing Line Revamping

介绍了宣钢炼铁厂为降低生产成本改善炉料结构，为替代昂贵的外购球团矿而进行的一期链箅机和回转窑球团生产线改造性大修。此次大修改造重点是要解决链箅机和回转窑生产线链算机、回转窑、环冷机工艺设备及自动化上存在的问题，改造后三大主机的设备作业率达到了100％，在保证球团矿质量的前提下，球团矿日产水平稳定在3000t以上。经过改造和生产实践加深了链箅机和回转窑球团工艺设备的了解，为后续稳定生产及二期工程改造积累了大量宝贵的经验。

In order to reduce the production cost and improve the charge structure, and also substitute the expensive imported pellet, a revamping overhaul is carried on to Phase I grate-kiln pelletizing line at the Ironmaking Plant of Xuanhua Iron ＆ Steel Co., Ltd., with the focus on solving the existing problems of the process equipment and automation system of the line, such as grate, rotary kiln, annular cooler. After the revamping overhaul, the three main equipment of the line reach 100% operation rate, and the pellet production level is stabilized at more than 3000t/d on the premise of ensuring the product quality. The practice in revamping and production has deepened the understanding of the process equipment of grate-kiln pelletizing line and accumulated a great deal of valuable experience for the following production stability and Phase II construction project.