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non low sulphur steel

The theoretical analysis and commercial experiment of desulfuration of ladle furnace for the refining of ultra low sulfur steels are carried out in this paper the results are optimizing the composition of slag increasing the optical basicity deeply deoxidizing of both molten steel and slag determining the proper slag weight are the effective methods of increasing the sulfur removal percentage

Steel Refining Carmeuse

Refining at the Ladle Metallurgical Furnace is the last but the most important stage of the steel melting process This stage gives steelmaker a final chance to refine the slag and adjust both the chemical composition and temperature of the steel There should be no compromise on the selection of fluxes ensuring the highest quality possible

Sulphur in Steels – IspatGuru

Sep 23 2014· Sulphur in Steels Sulphur S atomic number 16 and atomic weight 32 066 has density of 2 05 gm cc Monoclinic S melts at 119 25 deg C and boils at 444 6 deg C However S and iron Fe are miscible and Fe S binary system at one atmosphere of pressure forms a liquid at temperatures as high as 1800 deg C far above the boiling point of S alone

Ladle Refining Furnace Method for producing high quality

Ladle Refining Furnace A state of the art method for producing high quality construction grade steel specially with Iron ore as the raw material Much has been said about the efficacy of the Ladle Refining Furnace in the production of construction grade steel In fact though it is by no means a new technology it has recently found more

Refining furnace seconclary refining Steel Tube

CaO based powder processing of liquid steel sulfur can be reduced to below 0 02 In order to produce ultra low sulfur steels the hot metal desulfurization treatment when the hot metal sulfur content of 12 × 10 4 refining of sulfur in steel can be reduced to less than 7 × 10 4

Effect of Sulphur in Carbon Steel

It seems to me however that while it may be old school to believe in the detrimental action of sulphur it is not yet old school to believe in segregation that while it may be that 0 1 per cent of sulphur has no very great effect on the physical properties of steel a ladle analysis of 0 1 per cent of sulphur may readily result in 0 2 or

Sulfur Control in Ultra Low Sulfur Steel Refined by Ladle

Steelmaking Sulfur Control in Ultra Low Sulfur Steel Refined by Ladle Furnace Vacuum Degassing Yang Jing bo1 2 Yang Shu feng1 Gao Xiang zhou1 Li Jing she1 1 School of Metallurgical and Ecological Engineering University of Science and Technology

Ladle Furnace an overview ScienceDirect Topics

2 4 3 Ladle furnace refining and ladle slag The sulfur partition between the slag and metal depends on slag chemistry and is favored at low steel oxidation levels Removal of sulfur in the EAF is difficult especially in modern practices in which the oxidation level of the bath is high Nitrogen levels in steel as low as 50 ppm is

Vacuum Degassing of Steel Vacaero

Dec 05 2017· Vacuum degassing plays a critical role in the manufacture of steel The vacuum degassing process allows the production of high quality low carbon and ultra low carbon steels and stainless steels with minimal oxygen hydrogen and nitrogen contamination The main benefits include Reducing hydrogen content to avoid embrittlement of steel

US5472479A Method of making ultra low carbon and sulfur

A method of making ultra low carbon ultra low sulfur content steel comprising introducing molten metal and slag into a vacuum decarburizer to reduce the carbon content of the metal to below 0 005 followed by deoxidizing the molten steel deoxidizing the slag and mixing the slag with the molten steel to reduce the sulfur content to below 0 005

EP0785284A4 Process for vacuum refining of molten steel

A process for the vacuum refining of molten steels by flowing an oxygen gas into a molten steel containing at most 0 1 wt of carbon in an atmosphere of a vacuumness of 105 to 195 Torr at such an oxygen feed rate as to realize a cavity depth of 150 to 400 mm in a straight drum vacuum refining apparatus constituted of a bottom less straight drum vacuum tank and a ladle to effect

Sulfur control in ultra low sulfur steel refined by ladle

Sulfur substance that be in the most kinds of steel Research of influence of ladle furnace reductants in the desulfurization process Control ultra low sulfur steel The chemical degassing in the ladle furnace vacuum Maintaining a low sulfur content

Torpedo Ladle Car HarbisonWalker International

Torpedo ladle cars are used to transfer molten iron from the iron making section of the plant to the steel making section Under normal conditions the residence time of the molten iron in the ladle is two to four hours and the distance traveled is usually less than one half mile

Study on Refining Technology of Low Sulfur Steel

In order to bring on the producing of low ultra low sulfur steel and optimal control of refining slag composition and property converter tapping slag oxidability and oxygen activity have been analyzed In addition optimal refining slag composition and adding process adding system of modifying agent and bottom argon blowing in ladle were researched as well

Hydrodesulfurization Wikipedia

Hydrodesulfurization HDS is a catalytic chemical process widely used to remove sulfur S from natural gas and from refined petroleum products such as gasoline or petrol jet fuel kerosene diesel fuel and fuel oils The purpose of removing the sulfur and creating products such as ultra low sulfur diesel is to reduce the sulfur dioxide SO 2 emissions that result from using those fuels

AN INTRODUCTION TO PETROLEUM REFINING AND THE

PETROLEUM REFINING AND THE PROD UCTION OF ULSG AND ULSD OCTOBER 24 2011 Page 1 1 INTRODUCTION This tutorial addresses the basic principles of petroleum refining as they relate to the produc tion of ultra low sulfur fuels ULSF in particular

Steel Ladle HarbisonWalker International

Steel Ladle Refractory Solutions HarbisonWalker International is one of the largest domestic manufacturers of steel ladle refractories Our steel ladle refractory solutions are customized based on shop specific conditions to optimize refractory performance and improve safety refractory life and yield

About Us Ellwood Specialty Steel

The ladle is transferred to one of two refining stations for alloy adjustment and refining Arc heating and induction stirring at this step ensure homogenous mixing and interaction of steel and slag The ladle is then transferred to a vacuum degassing station whereby hydrogen can be removed to a

Ladle refining SubsTech

Molten steel in a ladle may be treated refined in a device called Ladle Furnace LF The ladle is transported to the Ladle Furnace stand where it is placed under a cover equipped with three graphite electrodes connected to a three phase arc transformer The ladle bottom has a porous refractory plug which is connected to the argon supply pipe at the Ladle Furnace stand

A Mathematical Model of Desulphurization Kinetics for

A Mathematical Model of Desulphurization Kinetics for Ultra low sulfur Steels Refining by Powder Injection during RH Processing Cheng yi ZHU 1 2 Peng ju CHEN Guang qiang LI 1 2 3 Xiao yan

Steel Ladle metallurgy Britannica

Steel Steel Ladle metallurgy The carrying out of metallurgical reactions in the ladle is a common practice in practically all steelmaking shops because it is cost efficient to operate the primary furnace as a high speed melter and to adjust the final chemical composition and temperature of the steel after tapping Also certain metallurgical reactions for reasons of equipment design and

Technology of Metallurgy for Ultra Low Sulphur Steel

On the basis of the desulphurization treatment of hot metal and liquid steel by thermodynamic and kinetic analysis of desulphurization reactions two kinds of melting technology for producing ultra low sulphur steel S ≤10×10 6 the LF refining of killed liquid steel and the RH refining with powder injection of unkilled liquid steel are proposed in this article

Desulfurization of steel SubsTech

The most popular method of desulfurization is removal of sulfur from molten steel to the basic reducing slag Basic slag is a slag containing mainly basic oxides CaO MgO MnO FeO A typical basic slag consists of 35 60 CaO MgO 10 25 FeO 15 30 SiO 2 5 20 MnO Transition of sulfur from steel to slag may be presented by the chemical equation S CaO CaS O The equilibrium

Ladle an overview ScienceDirect Topics

Feb 05 2012· This is only one of several reactions which can occur during ladle refining others are ρ the density S steel the bulk sulfur content of the steel S int the Similarly chemical modifications to inclusions and desulfurization can be practiced for ultra low carbon ULC and ultra low sulfur steels Many CFD researchers have

Study on Refining Technology of Low Sulfur Steel

On this basis refining process of low sulfur steel has been optimized The results show that sulfur content in steel is as low as 6 6×10 6 40×10 6 which achieved the production of low sulfur

A Mathematical Model of Desulphurization Kinetics for

line pipe and silicon steel 15 16 Although RH refining treatment has been successfully used in producing ultra low sulphur steels or ultra low car bon steels there still exist many problems in practical oper ating process Sulphur content in the steel can t be controlled stably below 10 ppm for most ultra low sulphur steels17–20

Mughal Steel

Ladle Refining In pursuit of making the finest grade of steel refining process is carried out through LRF ladle refining furnace The molten material is refined in a manner unique to MISIL through alloy addition and nitrogen purging process

Development of High Quality Heavy Plates on Nippon Steel

of sulfur 300 ppm It is desulfurized to a low level of 3 ppm in the steelmaking process Therefore a desulfurizing ratio exceeding 99 is required In the refining process for low sulfur steel at Kimitsu Works in order to attain this high desulfurizing ratio stably desul furization is applied at two stages molten iron desulfurization be

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