The Korean-style energy-saving oxygen blast furnace has successfully been built at the Hwanghae Iron and Steel Complex.

Last year this new-type metallurgical furnace was built at the Kim Chaek Iron and Steel Complex, which has completely shaken off the fetters of cokes by establishing the system of producing iron with local efforts, technology, raw materials and fuel 100 percent, and then such a furnace has been built at the Hwanghae Iron and Steel Complex. As a result, a comprehensive system of making Juche iron has been established at the leading iron production bases, the country’s iron-making industry has been put on a sure upturn stage of Juche orientation, and the independent foundations for national economic development has been further consolidated.

The respected Comrade Kim Jong Un made sure that bold, development-oriented and realistic targets were set to put the metallurgical industry on a Juche basis. He set forth the tasks of building more new-type oxygen blast furnaces at the Kim Chaek Iron and Steel Complex and the Hwanghae Iron and Steel Complex and increasing their production capacity, wisely led the work and opened up a broad avenue for completing the system of making Juche iron.

Thanks to the outstanding leadership of Kim Jong Un, who has the ambition that the future of the country's self-supporting economy for 50 to 100 years depends on putting the metallurgical industry on a Juche basis, efforts of creation and transformations were made to perfect the more developed new energy-saving iron production method and establish the system of making Juche iron at the leading iron production bases.

Scientists and technicians in the field of the metallurgical industry pooled their wisdom and enthusiasm in perfecting the new method of producing iron without using cokes.

The Kim Chaek Iron and Steel Complex completed the oxygen blast furnace in 2018 to put production on a normal basis, and built an energy-saving oxygen blast furnace in 2023.

The workers, technicians and officials at the Hwanghae Iron and Steel Complex turned out as one in the construction of a new-type oxygen blast furnace larger than the existing one.

The builders and shock brigade members of the complex, including the construction overhaul station, repairs and maintenance workshop, sheet metal processing workshop, wagon repair workshop, April 15 technical innovation shock brigade, modernization shock brigade and Kim Jin Shock Brigade, carried out various projects for putting production lines on a Juche basis in a three-dimensional way.

The workers of the complex completed the construction of furnace system, gasification system and floating system and the manufacture and assembly of steel structures and equipment, which was believed to take a year, in a matter of five months and finished the construction of 10 000 square metres of buildings, including a storehouse for raw materials, repair ground, gas distributing ground and pumping station.

Valuable research achievements and inventions were introduced into construction.

The process of drying raw materials by waste heat was newly built and the air compressor was transformed into an oxygen compressor to meet the specific conditions and profitability of the complex, bringing a big profit to the state.

Researchers at the IT Institute of the Hwanghae Iron and Steel Complex developed and introduced a measuring and automatic control system for measuring the level of molten iron and slag at the floating and furnace systems and automatically regulating the amount of raw materials and oxygen.

The perfection of the method of making Juche iron in the metallurgical industrial sector provided another turning point in dynamically opening up a broad avenue for comprehensive rejuvenation by increasing the development capability of the self-supporting economy.