CD shopping page |
2011-Sustainable Industrial Processing Summit
|
| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 708 pages |
| ISBN: | 978-0-9879917-1-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
High Potential Energy Saving Opportunity In Iranian Steel Industry
Mohammad Hassan Joulazadeh1;1AJINEH GOSTAR ESPADANA, Esfahan, Iran;
Type of Paper: Regular
Id Paper: 69
Topic: 5
Abstract:
Iranian steel production rate reached 11 million tons in 2009. BOF and EAF share in this production were 19.3 and 81.7%, respectively. Iron bearing charging materials of steelmaking units includes sponge iron (65.1%), hot metal (20.2%) and scrap (13.7%) in steelmaking furnaces. Due to limitation of scrap supply, Iranian EAFs work with 90% DRI and 10% scrap rate. In 2009, all sponge iron (8.2 million tons) charged in EAF as cold DRI. In this year, three DRI production units were commissioned in Iran. Each of them has 0.8 million tons capacity per year. According to the latest technology of DRI charging in Iranian EAFs, it’s possible to adopt hot DRI charging in Iranian EAFs. Nowadays, electric energy consumption in Iranian EAFs for charging rate of 90% DRI and 10% scrap is about 630 Kwh/t.l.s. By using HDRI charging process in Iranian EAFs, electrical energy can be saved with a rate of 140 Kwh/t.l.s. For the existing DRI-EAF facilities, usage of insulated containers and pneumatic transportation is recommended. For the forgoing and future projects, it’s recommended to use hot conveyors and direct gravity HDRI charging, respectively. From HSE view, this could reduce CO2 emissions by 10% per ton liquid steel .With adaptation of HDRI charging method in Iranian EAFs, economical saving for existing facilities will be at least 200 million US $ per year.