Chitoshi Matsumura

Title: Chitoshi Matsumura: Innovator in Steel Refinement

Introduction

Chitoshi Matsumura is a notable inventor based in Shinminato, Japan. He has made significant contributions to the field of metallurgy, particularly in the refinement of molten steel. With a total of 2 patents, his work has advanced the methods used in steel production.

Latest Patents

Matsumura's latest patents include a removal method of nitrogen in molten steel. This innovative process involves refining molten steel in an electric furnace using iron scrap as the main iron source. After tapping the molten steel into a separate refining vessel, a metallic-Al containing material and CaO are added to the bath surface. An oxygen-containing gas is then supplied to the molten steel, initiating a nitrogen-removal reaction through an AlN formation reaction. This method allows for the production of low-nitrogen steel at low costs, even when starting with molten steel that has a low carbon content.

Another significant patent is for a chromium-containing metal and the method for producing it. This high-Cr-containing metal is manufactured in an arc melting furnace and contains at least 85% chromium, with minimal amounts of aluminum, silicon, and sulfur. The manufacturing process involves reducing chromium oxides in the arc melting furnace with silicon, obtaining a molten metal rich in chromium, and refining it through a series of steps that include discharging slag and adding a basic flux.

Career Highlights

Throughout his career, Matsumura has worked with prominent companies such as JFE Steel Corporation and JFE Material Co., Ltd. His experience in these organizations has allowed him to apply his innovative ideas in practical settings, contributing to advancements in steel production techniques.

Collaborations

Matsumura has collaborated with notable colleagues, including Hiroiti Sugimori and Satoaki Kawaguchi. These partnerships have fostered an environment of innovation and have led to the development of new technologies in the field of metallurgy.

Conclusion

Chitoshi Matsumura's contributions to the steel industry through his patents and collaborations highlight his role as an influential inventor. His innovative methods for refining molten steel and producing chromium-containing metals have the potential to significantly impact the industry.