Korea Herald reported that South Korea’s No 2 steelmaker Hyundai Steel is the first company in the world to develop a technology that can completely eliminate emissions from its blast furnaces. It has successfully purified hazardous gas inside a blast furnace using the First Safety Valve, during the process of re ventilating hot air inside the furnace after general maintenance. After toxic gas emissions at its furnace breathers were pointed out by environmental groups in March 2019, Hyundai Steel immediately got in contact with a European engineering company and developed the valve in three months. The safety valve measures 1.5 meters in diameter and 223 meters in length, and Hyundai Steel has also applied for a patent in Europe.
Hyundai Steel has installed the First Safety Valve in all of its furnaces throughout the country, after first testing the technology at Dangjin Integrated Steelworks in South Chungcheong Province in January.