Thermal crack growth modeling in refractory linings of
mechanical analysis methods The initial data for crack size calculation and the moment of crack appearance obtaining are 3 dimentional temperature and stress fields in material of refractory lining of metallurgical installation calculated with finite elements method A standard refractory material of MgO Cr2O3 system used
Get Price
A Method for Steel Ladle Lining Optimization Applying
A steel ladle of voestalpine was the object used for lining concept optimization Figure 1a depicts the simplified two dimensional model representing a horizontal cut through the slag line position in the upper part of the steel ladle The model consists of a two half brick working lining a monolithic permanent lining a fiber board and a steel shell
Get Price
RESEARCH ON THE MECHANISM OF DAMAGE LINE
process on the ladle refractory In this purpose were studied the refractory destruction mechanisms used on LF the slag quality quality refractory and the slag influence on refractory especially because of the interactions between them definitely elements for steel quality and also for the refractory
Get Price
Analysis of Erosion of Mg c Bricks on 180t Ladle Slag Line
The new technologies required to produce high value added varieties of steel also put forward higher requirements on the life of ladle mg c bricks Skip to content 86 411 Building 8 Yintian South Park Yida Chuntian Ganjingzi District Dalian 116000 China
Get Price
THERMAL MECHANICAL STRESS ANALYSIS OF LADLE
stress of ladle lining and the tensile stress of the shell are very large in the course of working Under the action of such a large thermal stress the ladle lining is crushed and broken Finally the lining is broken and eroded by molten steel 3 V K Orlov analyzed the reason of ladle lining damage The ladle
Get Price
Understanding Refractory Failure A New Perspective
Moisture content in the fuel can affect the refractory material High moisture content or combined moisture content in the fuel with a reducing atmosphere can
Get Price
ladle slide plate and the advantages and disadvantages of
Thermal chemical erosion is another major cause of skateboard damage Refractory materials for skateboards come into contact with high temperature molten steel and slag during use and a series of chemical reactions occur causing chemical corrosion
Get Price
Use of slag line refractory in ladle for tire cord steel
Refractory for slag line of steel ladle had been improved to meet the demand of tire cord steel making in Baosteel Bricks with different material such as MgO Cr2O3 MgO ZrO2 C and MgO C were experimented in ladle The result shows that MgO C bricks with 6 carbon content can accommodate to the slag with different basicity meanwhile the cost is
Get Price
Exploration of new quality refractory to improve hot metal
In Tata steel all the shop follows almost similar lining maintenance practises Each ladle has mandatorily three layers of refractory lining namely working lining intermediate lining and permanent lining Working lining directly comes in contact with the hot metal experiences temperature up to 1600 C In the working lining ASC quality bricks are used except sprout area
Get Price
Post mortem analysis of alumina magnesia carbon refractory
During the service of the ladle when the secondary metallurgy takes place i e the adjustment of the steel composition refractories of the working lining are exposed to very aggressive conditions the high temperature of the process the oxidant atmosphere that prevails because it is an open vessel and contact with corrosive agents especially the liquid slag among others
Get Price
Damage Mechanism and Cause Analysis of Refractory
Damage Mechanism and Cause Analysis of Refractory Castable for Water cooled Beam September 24 2020 September 24 2020 Refractorymaterials Because the working conditions of the refractory castable
Get PriceImportant Considerations for Refractory Dryouts Startups
material will not allow any steam to pass thru the integrity of the lining being limited by its ability to contain the buildup of steam pressure within In an actual lining even a little water highly restricted can develop pressures that exceed the strength of the refractory material resulting in significant damage from explosive spalling
Get Price
Analysis of the causes of the damage to the ladle slide gate
Analysis of the causes of the damage to the ladle slide gate 12/06/2019 1 1 Thermal shock damage The temperature of the skateboard is very low before use During the pouring process the skateboard comes into contact with the high temperature molten steel for a short time The huge temperature difference caused by this will have a strong
Get Price
Numerical experimental analysis of thermal shock
Numerical experimental analysis of thermal shock damage in refractory materials Summary Coarse grain refractory materials are used in installations for iron and steel making operating at temperatures as high as 1800 °C A major cause leading to early failure of such installations is the wear of the refractory material due to fatal thermal
Get Price
MECHANISMS OF WEAR OF REFRACTORY MATERIALS IN SNORKELS OF
an analysis of the causes of failure in high chrome oxide refractory materials from slagging gasifiers Bennett J Kwong K S Powell C Thomas H Krabbe R 2006 print version
Get Price
Causes of damage to ladle purging plugWanhao Refractory
Causes of damage to ladle purging plug 1 Thermal stress The ladle purging plug directly contacts the high temperature molten steel and is subject to the continuous cold air flow which generates a large temperature gradient resulting in high concentration of stress 2 Scour and abrasion
Get Price
Understanding refractory failUres in fired heaters a guide
end users and refractory material suppliers can help all involved to better understand the details required to significantly reduce the likelihood of refractory failures in this article energy sK and Morgan examine some of the most common causes of refractory failure and what engineers can do to both fix a problem and avoid it in the future
Get Price
Understanding refractory failUres in fired heaters a guide
end users and refractory material suppliers can help all involved to better understand the details required to significantly reduce the likelihood of refractory failures in this article energy sK and Morgan examine some of the most common causes of refractory failure and what engineers can do to both fix a problem and avoid it in the future
Get PriceDamage Mechanism and Cause Analysis of Refractory
The strength and thermal shock stability and the external mechanical stress are the main factors for damage of the refractory castable for Skip to content Sales rongshengrefractory
Get PriceECONOMIC OPTIMIZATION OF LADLE FURNACE
Keywords Ladle Furnace Refractory I INTRODUCTION Current technologies of the ladle metallurgy and continuous casting of steel causes extreme damage to the ladle refractory linings 1 The refractory lining thickness of high temperature industrial furnaces is
Get Price
Understanding Refractory Failure A New Perspective
Refractory has always been an integral part of steam generating boilers In the steam generating industry refractory materials are used for filling gaps and openings to help keep the fire inside the fire box for lining ash hoppers wet and dry that collect ash and slag and for the protection of lower furnace wall tubes inside fluidized bed cyclone fired or refuse derived fired boilers
Get Price
steelLadle metallurgy Britannica
steelsteelLadle 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
Get Price
A statistical and post mortem study of wear and
Furthermore an analysis was also performed on the region between the electrofused MgO grains slag shown in Fig 7 and it was found to have the typical composition of slag which confirms the above referring to the attack of the grain of the refractory material by slag This refractory wear mechanism of the slag line seems to be the
Get Price
Analysis on the Damage of Refractory Brick Lining for Lime
Analysis of Damage Mechanism of Lime Shaft Kiln Lining 1 The upward movement of the calcining belt causes the preheating zone to withstand high temperature reactions One of the reasons is the imbalance of atmosphere The second is excessive wind Third the ash output is small or the ash output interval is too long
Get Price
Understanding refractory failuresPOWER Mag
Understanding why a refractory material fails requires a complex analysis of many interrelated factors materials that don t match the operating environment incompatibility with the
Get PricePost mortem analysis of alumina magnesia carbon refractory
Post mortem studies in secondary steelmaking ladles are an important way to determine the factors related to Alumina Magnesia Carbon AMC refractory corrosion AMC refractory bricks installed in the impact zone of a steelmaking ladle bottom were analyzed after 100 castings X ray diffraction X ray fluorescence chemical analysis reflected optical light microscopy scanning electron
Get PriceSteel Teeming Ladle and its Refractory LiningIspatGuru
Steel Teeming Ladle and its Refractory Lining Steel teeming ladle STL is needed in a steel plant to contain and transport liquid steel from the steel making furnace to the casting facility These days STL is used in a significantly more complex manner than the older steel melting shops where ladles were used simply to transport liquid steel
Get PriceAnalysis of the development of shaped Wanhao Refractory
measures to solve the problems of tundish refractory Oxidation of ladle slag line brick Several methods of hanging furnace top with anchor brick The main function of refractory lining in reheating furnac Risk of calcium carbide furnace
Get Price
Evaluation of the protective C2S layer in the corrosion
The refractory corrosion process is shown in Fig 9 XRD analysis of the surface of the doloma C post mortem brick showed the presence of periclase MgO lime CaO and graphite C The EDS analysis of area 1 is characteristic of a region where the composition of doloma particles prevails but with low carbon content inserted in Fig 9 In
Get Price
Reasons For Refractory Material Damage Of Converter
Reasons For Refractory Material Damage Of Converter Working Lining The mechanism of refractory material damage in converter working lining is very complicated generally speaking under the combined action of physical chemical and thermal stress conditions oxygen converter will endure mechanical abrasion scouring molten erosion thermal pall etc and finally causes the damage of working
Get Price
Analysis of Damage Causes of Refractory Material in Ladle
Chemical attack the acidic substances such as silica in iron oxide or slag react with the lining of refractory materials There are chemical reactions between iron oxide silica calcium oxide and magnesium oxide These reactions make the ladle lining The change to slag causes damage to the refractory material
Get PriceReasons for the damage of ladle purging plug
Reasons for the damage of ladle purging plug There are four main reasons for the damage of air permeable bricks thermal stress mechanical abrasion mechanical stress and chemical erosion 1 actual production the baking temperature of the ladle is 1000°C and the temperature of molten steel reaches 1600°C
Get Price
Damage mechanism of refractories used in steelmaking
High quality alloy steel is mainly smelted in electric furnace steelmaking in China In recent years with the continuous change of EAF steelmaking process including higher operating temperature larger and larger capacity of EAF stronger temperature sudden change increasing quality of alloy steel etc higher requirements are put forward for refractories
Get Price
Common causes of refractory failure Engineer Live
If you have a floor fired unit you will have castable burner blocks of a certain material grade and a different floor material surrounding the burner It s common to see cracks appear at the corner of the burner blocks if inadequate expansion joints are not installed 6 Convection castable/corbel damage in convection section
Get Priceladle slide plate and the advantages and disadvantages of
The skateboard of this material uses low expansion rate Al2O3 SiO2 ZrO2 raw materials made of oblique zircon mullite corundum etc as the main crystal phase a refractory material characterized by carbon bonding aluminum carbon skateboard It has quite good performance and applicability but the cracking and sliding surface wear in repeated
Get PriceCorrosion mechanism and kinetic behaviour of refractory
factors Corrosion of the lining material in contact with slag during ladle refining of steel is usually described in three major categories Dissolution or diffusion which is a chemical process by which the refractory material is continuously dissolved Penetration by which the slag penetrates into the refractory and causes
Get Price
