June 19, 2020
Nippon Steel Engineering Co., Ltd. (Representative Director and President: Yukito Ishiwa; Head Office: Shinagawa-ku, Tokyo; hereinafter, "NSE") is pleased to announce that it has received an order of 240 copper staves from Usiminas (Usinas Siderúrgicas de Minas Gerais S.A., Brazil) for its Ipatinga Plant Blast Furnace 3.
The cast-in steel pipe copper staves*1 adopted for high thermal load area have been vastly improved in performance over conventional products. As a result, they contribute to a longer service life and increased energy efficiency of blast furnaces.
Our cast-in steel pipe copper staves are manufactured in Vietnam as well as Japan, and we conduct quality control based on the technology we have cultivated up until now. In addition to the above features, we proposed an optimal copper stave layout that utilized the high freedom of design inherent to casting, and this combined with the high regard for our comprehensive technical ability led Usiminas to choose us over other overseas competitors.
Leveraging its cast-in stave design and manufacturing know-how cultivated over 40 years, NSE has developed cast-in steel pipe copper staves and sold them since 2004. NSE's cast-in steel pipe copper staves have been met with excellent reviews from customers in Japan, northern Europe, South Africa, and elsewhere. To date, the total number of deliveries has reached approximately 875 staves. Going forward, NSE will contribute to longer life and energy saving blast furnaces by expanding sales of its cast-in steel pipe copper staves.
*1 Cast-in steel pipe copper stave
Cooling equipment installed inside a blast furnace that is used for extracting molten iron from iron ores, a primary process in steelmaking. The stave helps to maintain the furnace shape and protect the shell from high-temperature gas and molten material inside the furnace.
Simulated behavior of descending material based on DEM analysis
Constraint of the upper and lower ends of the copper stave by gas seal boxes
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