Roasting Properties of Pellets With Iron Concentrate of Complex Mineral Composition |
| |
Authors: | FAN Jian-jun QIU Guan-zhou JIANG Tao GUO Yu-feng CAI Mei-xia |
| |
Affiliation: | 1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China Taiyuan Iron and Steel (Group)Co Ltd, Taiyuan 030003, Shanxi, China 2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China 3. Taiyuan Iron and Steel (Group)Co Ltd, Taiyuan 030003, Shanxi, China |
| |
Abstract: | Investigation was conducted on roasting properties of pellets with an iron concentrate of complex mineral composition. The results indicated that the pellets of complex mineral composition concentrate required higher preheating temperature and longer preheating time than that of single magnetite concentrate. Therefore, it is difficult for preheated pellets to withstand the mechanical collision in the roasting process in rotary kiln. It was found that after the iron concentrate being subjected to high pressure roll grinding, the specific surface area reached 2029.1 cm2/g. Consequently, the preheating and roasting temperature of pellets were decreased by 70 and 50 ℃ and preheating and roasting time were decreased by 2 and 4 min, respectively. Meanwhile, the compression strength of preheated and roasted pellets were increased by 200 N for a pellet and 220 N for a pellet, respectively. The mechanism lied in that the increase of specific surface area activated thermal reaction and promoted formation of iter-grain bridge. |
| |
Keywords: | pellet iron concentrate high pressure roll grinding (HPRG) specific surface area |
本文献已被 维普 万方数据 等数据库收录! |
| 点击此处可从《钢铁研究学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《钢铁研究学报(英文版)》下载全文 |
|