Increased Hot Blast Temperature (>1 000 oC)

A variety of techniques can be applied to increase the hot blast temperature including preheating of the fuel in conjunction with insulation of the cold blast line and waste gas flue. The feasibility of this depends on the waste gas temperature; e.g. at waste gas temperatures below 250°C heat recovery may not be a technically or economically attractive option. In some cases, imported heat may be used, e.g. sinter cooler heat, if the distances are reasonable. Heat recuperation with the use of a heat medium and its use for preheating fuel reduces energy consumption.

Development Status Products
Commercial
iron

Increased Hot Blast Temperature (>1 000 oC)Costs & Benefits

Parent Process: Blast Furnace System
Energy Savings Potential

The total energy savings possible by a combination of techniques is of the order of 0.5 GJ/t-HM (APP, 2010. p.48)
CO2 Emission Reduction Potential

Energy savings will result in reduced emissions.
Costs

Lower operating costs because coke ratio reduces by 2.8% per 100°C rise in blast temperature when it is maintained between 1000°C to 1200°C (Yiwei, et al., 2008).

Increased Hot Blast Temperature (>1 000 oC) Publications

The State–of-the-Art Clean Technologies (SOACT) for Steelmaking Handbook

Date: 

Dec
2010

Source: 

Asia Pacific Partnership on Clean Development and Climate

Format: 

PDF

Type: 

Publications

 

The State–of-the-Art Clean Technologies (SOACT) for Steelmaking Handbook is developed as part of the Asia-Pacific Partnership on Clean Development and Climate program and seeks to catalog the best available technologies and practices to save energy and reduce environmental impacts in the steel industry. Its purpose is to share information about commercialized or emerging technologies and practices that are currently available to increase energy efficiency and environmental performance. 

http://asiapacificpartnership.org/pdf/Projects/Steel/SOACT-Handbook-2nd-Edition....

Page Number: 

48-49

Increased Hot Blast Temperature (>1 000 oC) Conference Papers

Practice of Improving Blast Temperature of 2500m3 BF

Format: 

PDF

Type: 

Conference Papers

Part of the Aistech Conference proceedings of 2008.

http://steellibrary.com/BookContents/PR-353-023%201%20View%20Abstract.pdf