Effect of Selenium on the Interaction Between Refractory and Steel

Self Cite

Herein, the contact angle between a Si–Mn‐killed steel and MgO‐based refractory is measured in a reduction atmosphere at 1853 K using the sessile drop method. As the cerium content in the steel increases from 0 to 0.0450 wt%, the initial contact angle between the steel and the refractory slightly increases from 136° to 138°, the equilibrium contact angle decreases from 131° to 124°, and the steel surface tension reduces from 1.756 to 1.624 N m−1. Cerium in the steel retards the formation of Mg–Si–O oxide on the steel drop surface. A higher cerium content promotes the chemical reaction, resulting in a decrease in the contact angle. The cerium addition leads to an increase in the steel–refractory reaction depth. With an increase in cerium in the steel, the meniscus contact angle between the steel and the micropore in the refractory increases. Consequently, the lower driving force of steel penetrating into the refractory causes the reduction of steel penetration into the refractory.

Section: Methodsmentioning

confidence: 99%

Effect of Cerium on the Interaction between a Si–Mn‐Killed Steel and a MgO‐Based Refractory

Cui

Cheng

Ren

et al. 2022

Self Cite

“…In this study, the wetting behavior between the steel and MgO-SiO 2 refractories was studied using high-temperature contact angle measuring instrument in a reducing atmosphere, and the detailed description of the experimental procedure was given in the previous work. [4,27,28] The sessile drop method was employed to measure the contact angle. The steel sample in the center of the refractory substrate was put in the constant temperature zone of the heating furnace.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, with the increase of SiO 2 content in the refractory, the vapor pressure of magnesium produced by the decomposition of refractory decreased under the experimental conditions, resulting in the decrease of the dissolved magnesium content in the steel. According to the previous study, [ 4,27,28 ] with the decrease of the dissolved magnesium content in the steel, the reaction product transformed from Mg 2 SiO 4 to MgAl 2 O 4 . Therefore, when the content of SiO 2 in the refractory was low, Mg 2 SiO 4 was easier to form on the surface of the steel.…”

Section: Interface Analysis Between the Molten Steel And The Refractorymentioning

confidence: 98%

“…[2] Refractories materials used for producing the clean steel should have the characteristics of high corrosion resistance, low thermal expansion, and good thermal conductivity. [3,4] Due to the inevitable interactions between the molten steel and refractory materials, it has a great influence on the steel quality, [5][6][7] the refractory service life, and production safety, [8][9][10][11][12][13] which is significantly affected by the wettability. [14] The wettability between liquid steel and pure oxide refractory is well studied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wettability Between Si–Mn‐Killed Steel and MgO‐Based Refractory Containing SiO₂ Impurities

Cheng¹,

Ren

Liu³

et al. 2022

Self Cite

Herein, contact angles between the Si–Mn‐killed steel with and without cerium and the MgO–SiO2 refractory are measured in a reducing atmosphere. With the increase of the SiO2 in the refractory from 3 to 10 wt%, the initial contact angle for the steel without cerium decreases from 140.2° to 131.4°, and the equilibrium contact angle decreases from 136.8° to 127.8°. For the cerium‐containing steel, the initial contact angle and equilibrium contact angle decrease from 140.9° and 120.6° to 131.6° and 107.4°, respectively. With the increase of SiO2 content in the MgO‐based refractory, the increase of the Mg2SiO4 in the refractory causes the reduction of the initial contact angle between the Si–Mn‐killed steel and the refractory. The interfacial reaction between the steel and the refractory decreases the contact angle. The addition of cerium in the steel promotes the interfacial reaction, obviously decreasing the contact angle.

“…The Mn oxides on the interaction between the refractory and melting steel have strongly affected the service life of the reactor, steel cleanliness, and production safety. [24][25][26] Additionally, the formed Mn oxides' dust damages the vacuum system and increases emissions. Unfortunately, the characteristics of the oxidized phase of the Mn fumes from melting Mn steel after the vacuum treatment have not been reported to date.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Oxidation Behavior of Mn Fumes Generated in the Vacuum Treatment of Melting Mn Steels

Chu

Bao

et al. 2020

Herein, the phase, composition, morphologies, particle size distribution, and specific surface area of Mn oxide fumes generated after the vacuum treatment of melting Mn steels with different initial Mn contents are characterized. The thermodynamic calculation results reveal that for a given temperature and pressure, Mn vapor generation increases with increasing initial Mn content in steel. Moreover, the experimental results find that the amount of the Mn oxide fumes on the vacuum chamber after vacuum processing gradually increases with increasing initial Mn content in the melt. The fumes on the crucible generated after vacuum processing are composed of mainly coral‐shaped Mn3O4 with the size of 500 nm and a small amount of spherical‐like Mn2O3 with the sizes of 50–200 nm. Meanwhile, the fumes deposited on the furnace chamber contain Mn nanoparticles with the sizes of less than 50 nm, MnO nanorods with the sizes of 50–200 nm, and Mn3O4 nanoparticles with the sizes of 50–500 nm. In addition, the main phase of the fumes deposited on the vacuum chamber gradually changes to elemental Mn with an increase in the initial Mn content. The temperature and particle size are responsible for thermodynamic stability of Mn oxides at the nanoscale.