Acoal dust injection (CDI) system has been operationalised in blast furnace-4 of Rourkela Steel Plant (RSP). This latest operational facility will result in improvement of techno-economic parameters and enhance productivity of hot metal in the blast furnace, a Press release issued here on Tuesday stated. CDI of blast furnace -4 has a design capacity of injection up to 100 kg/ton of hot metal, which will result in financial saving of approximately Rs30 crore per annum.
Through CDI, the pulverised coal injection (PCI) facilitates consumption of cheaper coal in the system replacing the expensive coke thereby cutting down on cost. The facility will augment the efficiency and raw material optimisation by facilitating direct consumption of coal and reducing coke rate. CDI facility in BF-4 is a capital scheme which has been integrated with the ongoing expansion programme of the steel plant as a part of the massive modernisation and expansion drive undertaken by SAIl.
Chairman, SAIl CS Verma said this energy efficient facility will enhance the productivity of blast furnace along with reducing the coke rate resulting in profit for the Plant. Earlier in April 2014, CDI facility was operationalised at BF – 5 of the steel Plant. It is a major energy conservation initiative undertaken by the steel plant.
Almost all the new facilities under the expansion schemes at RSP have been completed and made operational. The benefits out of these have started accruing. Pulverised coal injection is an essential tool for the improving blast furnace process parameters and Furnace profitability. PCI is a process that involves blowing large volumes of fine coal granules into the blast furnace.
This provides a supplemental carbon source to speed up the production of metallic iron, reducing the need for coke production. As a result energy use and emissions can be reduced. This helps in substantial reduction of coke consumption in the blast furnace. Coal being a costly and vital industrial input for steel making, an alternative and energy efficient technology like CDI is proving beneficial for the industry.