Increased Blast Furnace Top Pressure (> 0.5 Bar Gauge)

In this technology, blast furnace off gas cleaning is performed using either a dust catcher or cyclone in conjunction with an annular gap wet scrubber. The scrubber consists of a movable cone assembly which allows the top pressure of the furnace to be controlled accurately and consistently. Increased top pressure helps good furnace operation and reduced fuel rate by decreasing velocity of the gases and by increasing retention time for the gas-solid reactions. In addition to reducing the fuel rate, this measure helps reduce the hot metal silicon variability and increases productivity.

Chinese flag Indian flag US flag This technology is regarded to have a high application potential for China, India and the United States, and in particular for the new plants, as the retrofitting of existing blast furnaces may not be easy.

Development Status Products
Commercial
iron

Increased Blast Furnace Top Pressure (> 0.5 Bar Gauge)Costs & Benefits

Parent Process: Blast Furnace System
Energy Savings Potential

This technology reduces coke rate and tuyere level injectants. Furnaces operating at high pressures can produce electricity in order of 0.35 GJ/t-HM if the system has recovery turbines installed

CO2 Emission Reduction Potential

Lower emissions due to reduced energy consumption are expected.

Costs

Increased Blast Furnace Top Pressure (> 0.5 Bar Gauge)Schematic

Increased Blast Furnace Top Pressure (> 0.5 Bar Gauge) Publications

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

 

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. 

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