A Mathematical Model of Desulphurization Kinetics for Ultra-low-sulfur Steels Refining by Powder Injection during RH Processing

A CFD Study on Refractory Wear in RH Degassing Process

“…The Ruhrstahl-Heraeus (RH) degasser is widely used for the production of the ultra-clean steel, since it could efficiently reduce carbon and sulfur contents in molten steel. [1][2][3] It is well known that the complicated flow of the molten steel in the RH degasser, caused by the vacuum and the lifting gas, would create a significant wear and tear of the lining refractory. [4][5][6] Besides, the slag impregnation, depended on the chemical composition and the smelting temperature, also induces the degradation of the lining refractory.…”

Effect of Sulphur Concentration on Precipitation Behaviors of MnS-containing Inclusions in GCr15 Bearing Steels after LF Refining

“…Peng-ju CHEN, 1,2) Cheng-yi ZHU, 1,2) * Guang-qiang LI, 1,2) Ya-wen DONG 1,2) and Zhi-cheng ZHANG 3) 1 The precipitation behavior and mechanism of MnS-containing inclusions in GCr15 bearing steels were analyzed. The results show when the optical basicity of the refining slag is 0.776, the minimum sulphur concentration is 0.0020 mass% in the present samples.…”

“…It is commonly accepted that large and shape irregular sulphide inclusions jeopardize microstructure uniformity and deteriorate mechanical as well as processing properties of the steels. [1][2][3] The precipitation behavior and influence factors of MnS-containing inclusions have been studied intensively in many steel grades. Davies et al 4) reported that the fraction of oxides encapsulated by sulphides increased with reducing of the oxygen concentration in the steels.…”

Tracking Large-size Inclusions in Al Deoxidated Tinplate Steel in Industrial Practice

“…[1][2][3] Tinplate steel can be produced by various refining processes, such as RH refining, LF refining, and LF + RH refining. 4,5) In order to reduce the product cost, an increasing number of steel plants adopt RH refining for tinplate steel production.…”