Effects of Reoxidation of Liquid Steel and Slag Composition on the Chemistry Evolution of Inclusions During Electroslag Remelting

2018 ◽  
Vol 49 (4) ◽  
pp. 1675-1689 ◽  
Author(s):  
Chengbin Shi ◽  
Hui Wang ◽  
Jing Li
Keyword(s):  
Liquid Steel ◽  
Slag Composition ◽  
Electroslag Remelting

Mechanism of Slag Composition Change During Electroslag Remelting Process

2011 ◽  
Vol 18 (10) ◽  
pp. 24-28 ◽  
Author(s):  
Jun-xue Zhao ◽  
Yan-mei Chen ◽  
Xiao-ming Li ◽  
Ya-ru Cui ◽  
Xiao-tao Lu
Keyword(s):  
Slag Composition ◽  
Electroslag Remelting ◽  
Composition Change

Increasing in effi ciency of steel refi ning process by using production waste

2020 ◽  
pp. 531-533
Author(s):  
Yu.V. Grebnev ◽  
N.I. Gabel'chenko ◽  
D.Yu. Grebnev
Keyword(s):  
Liquid Steel ◽  
Economic Effect ◽  
Electricity Consumption ◽  
Electroslag Remelting ◽  
Resistant Steel ◽  
Desulfurization Rate ◽  
Effi Ciency ◽  
Steel Increase ◽  
Experimental Melting ◽  
20Gfl Steel

The results of the possibility for using of spent ANF-6-1 fl ux for electroslag remelting and breakage of spent silicon carbide abrasive wheels in the smelting of 20GFL steel are presented. Noticeable advantage of the experimental smelting technology is shown. Saving of expensive materials, reduction of harmful impurities in the metal and increase in the desulfurization rate from 0.0004 to 0.0007 %/min are noted. The use of spent ANF6-1 fl ux for electroslag remelting made it possible to reduce the duration of melting, the consumption of slagforming materials and reducing agents. There is also decrease in electricity consumption by 11 kW/h per ton of liquid steel. Increase in the plastic characteristics and impact toughness of 20GFL steel is shown when using the experimental melting technology in comparison with the current one. At the same time, the strength characteristics of steel remained at the same level. The economic effect at using of secondary materials in the smelting of 20GFL cold-resistant steel is 430...450 rubles per ton of liquid steel.

Study on the Cleanliness of 316L Stainless Steel

2011 ◽  
Vol 311-313 ◽  
pp. 881-885
Author(s):  
Gang Li ◽  
Jing She Li ◽  
Shu Feng Yang ◽  
Yan Jie Wang ◽  
Nai Song Li
Keyword(s):  
Stainless Steel ◽  
Acid Solution ◽  
Power Supply ◽  
Slag Composition ◽  
316L Stainless Steel ◽  
Electroslag Remelting ◽  
Drawing Process ◽  
Total Oxygen ◽  
Three Phase ◽  
316L Steel

The process of three-phase electroslag furnacefoundry casting  electroslag remelting was used to produce 316L stainless steel ultra-fine wires with a diameter of 0.018mm. Breakage of the wire often occurs during drawing process due to the existence of inclusions in the steel. In order to improve the cleanliness of 316L steel, the deoxidizer and top slag composition were optimized by industrial trials in this production process. As a result, the total oxygen (T.O.) content decreased from 120 ppm to 57ppm. During the electroslag remelting process, the composition of electroslag and the power supply were optimized. Argon protection was used and electrode was washed by acid solution before refining. Finally, the T.O. in the remelting ingot can be controlled below 20 ppm.

Effect of slag composition on desulfurization during recycling rejected electrolytic manganese metal by electroslag remelting

2021 ◽  
Vol 118 (2) ◽  
pp. 206
Author(s):  
Yu Liu ◽  
Guangqiang Li ◽  
Qiang Wang ◽  
Ru Lu ◽  
Xijie Wang ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Distribution Ratio ◽  
Slag Composition ◽  
Molten Slag ◽  
Electroslag Remelting ◽  
Metal Scrap ◽  
Sulfur Distribution ◽  
Lower Viscosity ◽  
Electrolytic Manganese ◽  
Sulfur Distribution Ratio

To reduce the Mn vaporization during recycling rejected electrolytic manganese metal by electroslag remelting, it is proposed to reduce the temperature of molten slag pool, but which leads to the degradation of slag desulfurization. The desulfurization by interaction between CaF2–CaO–Al2O3–Na2O slag and rejected electrolytic manganese metal scrap was studied from the view of thermodynamics in this study. The results show that sulfur distribution ratio decreases with increase of CaF2 content, and increases with the increase of Na2O content and temperature. Na2O increases sulfur distribution ratio of slag by increasing CaO activity. Na2O addition in CaF2–CaO–Al2O3–Na2O slag can enhance desulfurization ability of slag due to the larger sulfur distribution ratio and lower viscosity. Thus, sulfur content in test of slag T3 bearing 45.8 wt% CaF2-23.2 wt% CaO-22.7 wt% Al2O3-8.3 wt% Na2O is much lower than that of slag without Na2O, implying that 45.8 wt% CaF2-23.2 wt% CaO-22.7 wt% Al2O3-8.3 wt%Na2O slag is the promising slag for recycling rejected electrolytic manganese metal by ESR.

Effect of SiO2 containing slag for electroslag remelting on inclusion modification of 42CrMo steel

2019 ◽  
Vol 116 (6) ◽  
pp. 627 ◽  
Author(s):  
Yu Liu ◽  
Zhao Zhang ◽  
Guangqiang Li ◽  
Yang Wu ◽  
Xijie Wang ◽  
...  
Keyword(s):  
Slag Composition ◽  
Molten Slag ◽  
Oxide Inclusion ◽  
Electroslag Remelting ◽  
Slag Viscosity ◽  
Oxide Inclusions ◽  
Al Content ◽  
42Crmo Steel ◽  
Increasing Trend ◽  
Inclusion Modification

Five heats were carried out to study the effects of SiO2 containing slag for electroslag remelting (ESR) on inclusion characteristics of 42CrMo steel. Fluoride vaporization at elevated temperature from slags was also explored by thermogravimetric analysis. The results show that fluoride vaporization is dominated by slag viscosity and component activities in the melt. Slag composition has an important effect on the composition of the oxide inclusion. For 70 wt% CaF2–30 wt% Al2O3 slag, the compositions of oxide inclusions in remelted steel show no obvious differences compared with the virgin steel. Whereas, SiO2 content in oxide inclusions of steel processed by slag bearing SiO2 show an increasing trend with increase of SiO2 content in 50 wt% CaF2–CaO–SiO2 slag, and the MgO · Al2O3 inclusions are modified to (Al,Ca,Mg,Si)O inclusions with low melting temperature. Al2O3 contents in oxide inclusions are also closely related to the Al2O3 concentration in the molten slag, which increase with the addition of Al2O3 in slag bearing SiO2. In testing various slags, the incorporation of slag T2 with 50 wt% CaF2–30 wt% CaO–20 wt% SiO2 shows the highest cleanliness in remelted steel. This implies that slag T2 can be a promising slag for ESR process of alloy steel requiring Al content refinement due to less fluoride vaporization from slag and better inclusions modification.

Sign in / Sign up

Export Citation Format

Share Document