Kobe Steel Technology to Cut CO2 Emissions from BF Verified
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Kobe Steel Technology to Cut CO2 Emissions from BF Verified

Kobe Steel Ltd announced that it has successfully demonstrated the technology that can reduce a significant amount of CO2 emissions from blast furnace

Kobe Steel Ltd announced that it has successfully demonstrated the technology that can reduce a significant amount of CO2 emissions from blast furnace operations, combining the technologies of Midrex in the engineering business and the blast furnace operation technology in the iron and steel business. The demonstration test was conducted for a month at a large blast furnace of 4,844 cubic meters volume of the Kakogawa Works in Hyogo Prefecture in Japan in October 2020. The quantity of CO2 emissions from the blast furnace is determined by the reducing agent rateor the quantity of carbon fuel used in blast furnace ironmaking. In the demonstration test, it was verified that RAR could be stably reduced from 518 kg per tonne hot metal to 415 kg per tonne hot metal by charging a large amount of hot briquetted iron produced by the MIDREX. The results indicate that this technology can reduce CO2 emissions by approximately 20% compared to a conventional method. The results are compared with fiscal 2013, which is the base year of the CO2 reduction targets set by the government and the KOBELCO Group

C02 reduction cost using this technology is calculated as follows:

{(A – B –C) / D} + Equipment cost + other costs

A - Quantity of HBI charged x unit price

B - Quantity of iron ore reduced x unit price

C - (Quantity of coke reduced x unit price) - (Quantity of PCI x unit price)

D - Quantity of reductant reduced x CO2 emission factor

The key technologies utilized for this achievement are:

(1) Technologies of Midrex for HBI manufacturing in the engineering business

(2) Blast furnace operation technology in the iron and steel business

Incuding advanced pellet production technology, HBI charging technology for blast furnaces, and blast furnace operation technology utilizing AI. All of these technologies are developed by the KOBELCO Group as generic solution technologies applicable to various blast furnaces.

In addition, the world's lowest level of coke rate of 239 kg per tonne hot metal has been achieved in the demonstration test of this technology. The company sees it as a promising solution that could become readily available in the near future at a lower additional cost compared to other CO2 reduction measures.

Kobe Steel will keep improving this CO2 reduction solution technology while further reducing CO2 emissions and achieving lower costs for CO2 reduction. The success of the demonstration test on an actual blast furnace has made a significant step forward in providing low CO2 steel products to customers. As moving forward with Kobe Steel environmental efforts on the scale of the whole supply chain, we will establish production and sales systems and define the terms and conditions for sales so that Kobe Steel can provide customers with low CO2 steel products that offer new added value.

The mission of the KOBELCO Group is to develop and establish technologies that can reduce CO2 emissions as quickly as possible and at the lowest possible cost in order to proceed with the initiatives to create a green society toward the goal of achieving carbon neutrality in 2050 as declared by the Japanese government.

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