Based on the active chemical properties of rare earth elements, the characteristics of oxygen, sulfur, nitrogen and other elements, combined with the main components of steel, the metal materials research institute of BFXT Rare Earth Institute puts forward high cleanliness. The method of adding rare earth iron alloys, and the development of high-clean rare earth iron alloy preparation technology. At the same time, more than 40 kinds of rare earth iron alloy product series and rare earth iron alloy particles, rare earth iron alloy powder, rare earth iron alloy cored wire and other new products have been developed in three categories and more than 40 different ratios. Its preparation technology. After the joint appraisal by the China Rare Earth Society and the China Rare Earth Industry Association, the overall technology has reached the international level.
The rare earth ferroalloy technology won the second prize of China Rare Earth Science and Technology Award. Currently, it has accepted 12 patents on rare earth ferroalloys, and formulated 4 industry/group/local standards. BFXT mainly produces high-clean rare earth iron alloys. Rare earth steels are mainly produced in BTGT. Rare earth iron alloys have suitable melting points and density, and are easy to be added into molten steel to melt and mix; at the same time, they have strong oxidation resistance, low segregation of rare earth components in the alloy, and impurities The element content (especially oxygen, sulfur, etc.) is low; adding to steel can achieve protective melting, which can significantly increase the recovery rate of rare earths in steel, and can realize the precise and efficient addition of rare earths in the industrial production of rare earth steels, which can effectively avoid Molten steel flocculation and other key technical bottlenecks that have long hindered the industrial application of rare earth steel. With this product, the industrial production of five, fourteen and fifteen continuous castings of rare earth steel and nearly 2,000 tons of rare earth cast steel have been completed in BTGT. Now rare earth ferroalloys have been promoted to 15 enterprises and scientific research institutions in the fields of steel, cast steel, and cast iron.
BTGT has begun to be used in batches in products such as wear-resistant steel, pipeline steel, and high-strength steel. At present, rare earth steel produced by using rare earth ferroalloys has been applied in the Daxing International Airport, the Sino-Russian Eastern Route, the Shaanxi-Beijing Fourth Route and other gas pipelines, the "China Sky Eye" FAST large radio telescope sightseeing bridge, automobiles, and home appliances.