Refractory Lining of the Electric Arc FurnaceIspatGuru
May 06 2020 · Slag line refractory design in EAFs is the combination of bricks and monolithic refractories. A very common design for the slag line is Mag-C bricks of 300 mm to 450 mm in thickness and with 10 to 20 of C content. The C phase of the brick is composed of graphite and a carbonaceous resin bond. There have been numerous developments to improve the performance of the refractory lining of ladles after the slag line the bottom is one of the most solicited area as this section sup-ports the
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(PDF) ENDLESS LINING OF LADLE BOTTOMS FUNDAMENTS
There have been numerous developments to improve the performance of the refractory lining of ladles after the slag line the bottom is one of the most solicited area as this section sup-ports the May 06 2020 · Slag line refractory design in EAFs is the combination of bricks and monolithic refractories. A very common design for the slag line is Mag-C bricks of 300 mm to 450 mm in thickness and with 10 to 20 of C content. The C phase of the brick is composed of graphite and a carbonaceous resin bond.
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Ladle LiningsVesuvius
Cast Ladle Lining Solutions. Benefits of Vesuvius solutions. Contain steel and slag safely. Maximise capacityutilising the thinnest lining possible. No negative effect on steel quality. Long balanced and predictable life. Low heat loss. Low thermal capacity. Keep shell cool. Description Ladle refractories are divided into working lining and insulating lining ladle refractories can be chosen according to different steel smelting process and composition of steel slag such as use integrally casting for normal steel ladle use MgOC brick for refining ladle use carbon-free ladle brick for low-carbon steel smelting.
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What refractories are suitable for ladle slag line amplow
Jul 17 2019 · The refined ladle slag line is made of MgO-C brick or MgO-CaO-C brick which is mainly determined by the refined steel grade slag characteristics ladle the lining structure of the slag line refractory gener-ally comprises a wear refractory (in many cases MgO–C brick etc.) safety brick (in almost all cases two layers) and the steel shell. Taking the corrosion behaviour of slag line refractories in the steelmaking ladle as an example it is
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Slag conditioning effects on MgO–C refractory corrosion
Sep 01 2013 · Slag conditioning practice provides important benefits to the steelmaking processes including ladle refractory life improvement lower flux cost/additions better control of metal May 06 2020 · Slag line refractory design in EAFs is the combination of bricks and monolithic refractories. A very common design for the slag line is Mag-C bricks of 300 mm to 450 mm in thickness and with 10 to 20 of C content. The C phase of the brick is composed of graphite and a carbonaceous resin bond.
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Magnesia Alumina CastableRS Kiln Refractory Bricks
Ordinary Al2O3-MgO castable is composed of special class or first glass high alumina bauxite aggregate and fines sintered magnesia sand powder. It s bonders are silica micro powder and magnesia fines. Ordinary Al2O3-MgO castale has good slag corrosion resistance high refractoriness under load and can be used for continuous casting ladles Next we will introduce the refractory for steel ladle. Refractory construction method and time for ladle . Ladle with integral casting is currently more steel companies choose way of ladle lining construction with monolithic refractories whole pouring construction in just 3 days the price is lower than brick use times higher than that of the
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Discussion on the Problems of Aluminum Magnesium Castables
Nov 28 2020 · The research and development of MgO-C castable for ladle slag line due to fluidity and C s oxidation resistance etc. are not perfectly solved its use effect is still not up to the level of MgO-C brick. However the overall lining of the refined ladle is the direction of mechanized construction of the ladle lining. A very important property of the Al2O3/MgO/C refrac- tories is its residual expansion during the usage. Such expansion is responsible for the formation of a mono- lithic refractory lining5resulting in a decreased steel penetration through the refractory joints.
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Refractory Solutions for Stainless Steelmaking
Ultra-low carbon MgO-C • Special carbon source • Retained carbon < 2 • Suitable for steel grades with 30 to 70 ppm maximum carbon content • High thermal shock resistance Challenge • Carbon pickup to steel from refractories during ladle treatment • Monolithic lining burnt doloma and MgCr in some cases not suitable due to metallurgy Refractory materials are essential for the production of iron and steel. They are used in the direct reduction modules coke oven batteries blast furnaces hot metal transport and pretreatment oxygen converters electric furnaces steel ladles
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Feature Article . . . MgO-C REFRACTORIES FOR STEEL LADLES
Feature Article . . . MgO-C REFRACTORIES FOR STEEL LADLES SLAG LINE Marco Antônio Quintela Fábio Duarte Santos Celso Anízio Pessoa José de Anchieta Rodrigues and Victor Carlos As a result purging efficiency in the turbulent area is ineffective and leads to unnecessary cooling of steel and higher refractory wear.Another important function of Ar-purging is the mixing of steel slag required for effective steel desulphurization ( REFRACTORIES FOR CLEAN STEELWhile MgO-C bricks are standard for the ladle slag zone
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RefractoriesIndustrial Minerals
Usage of Graphite in Refractory Bricks steel ladle BOF Magnesia Carbon Bricks (MgO-C) and Magnesia Dolomite Carbon Bricks (CaO–MgO–C) mainly for steel industry wear lining forbasic oxygen furnaceelectric arc furnacessteel casting ladles and in functional products purging and tap-hole bricks Oct 27 2020 · Development of refractory materials for ladle lining. According to a steel mill they have 3 types of the ladle. In the order of commissioning they are 120 t ladle 150 t ladle and new 150 t ladle of which the new 150 t ladle is modified from the original 40 t ladle.
Get PriceA Method for Steel Ladle Lining Optimization Applying
Aug 09 2018 · 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 Direct carbon burnout and the MgO reaction are the main causes for their failure in the freeboard. However pitch bonded magnesia refractories are able to compete with magnesia–chromite bricks in the ladle bottom and in the lower metal bath region where levels of turbulence and slag infiltration are limited. Simultaneously both the MgO–C
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(PDF) Characteristics and wearing mechanisms of MgO-C
in the degradation process of MgO-C refractory which is the most widely used material for slag lines in steelmaking. Many steel plants use MgO-C refractories with a content of C between 5 and 20 wt- as ladle refractory lining nearest the molten steel. The function of the carbon is to fill out the porous structure and to avoid the slag to penetrate. One explanation to this is that the wetting angle between slag and graphite is big and that a dense layer of
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(PDF) A Review on Recycling of Refractories for the Iron
Refractory materials are essential for the production of iron and steel. They are used in the direct reduction modules coke oven batteries blast furnaces hot metal transport and pretreatment oxygen converters electric furnaces steel ladles May 06 2020 · Slag line refractory design in EAFs is the combination of bricks and monolithic refractories. A very common design for the slag line is Mag-C bricks of 300 mm to 450 mm in thickness and with 10 to 20 of C content. The C phase of the brick is composed of graphite and a carbonaceous resin bond.
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Investigation of the corrosion of MgO-graphite ladle
Corrosion and erosion of refractory bricks used for lining the slag-line of secondary steelmaking vessels are an important problem. Refractories are a major cost factor in steel shops and their loss needs to be minimized. Corrosion of MgO-C refractories occurs through the loss of carbon bond phase and by reaction with corrosive slags. A laboratory slag corrosion testing method was developed a) Establishing a kinetic model for carbon burnout in MgO-C refractories and its experimental evaluation at laboratory scale. b) Simulation of steel ladle preheating via computational fluid dynamics (CFD) of which output should give data to predict possible carbon burnout in MgO-C refractories.
Get PricePaperrefractories-worldforum
Soc. 33 (1996) 832–838 5 Xue J. Development and application of ultralow- carbon-containing MgO-MgAl2O4-C bricks for ladle slag line. Naihuo Cailiao 45 (2011) 107–109 6 Ganesh I. et al. An efficient MgAl2O4 spinel additive for improved slag erosion and penetration resistance of high-Al2O3 and MgO-C refractories. Nov 28 2020 · The research and development of MgO-C castable for ladle slag line due to fluidity and C s oxidation resistance etc. are not perfectly solved its use effect is still not up to the level of MgO-C brick. However the overall lining of the refined ladle is the direction of mechanized construction of the ladle lining.
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Steel Teeming Ladle and its Refractory LiningIspatGuru
Nov 08 2014 · The refractory materials normally used for lining are dolomite bricks magnesia chrome bricks magnesia carbon bricks high alumina bricks aluminum carbon bricks and high alumina castable. The types of refractory construction vary widely depending on the operating conditions and on the ability to cycle STLs rapidly. A very important property of the Al2O3/MgO/C refrac- tories is its residual expansion during the usage. Such expansion is responsible for the formation of a mono- lithic refractory lining5resulting in a decreased steel penetration through the refractory joints.
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The Role of Graphite in Refractories such as Al2O3/MgO/C
-MgO-C (AMC) refractories for steel ladle lining Important spec Residual expansion during the usage Temperatures from 1600 to 1750 °C resistance against turbulence of steel bath during heating/purging Thermal shock during filling and emptying Corrosion contact with basic steel ladle slags Sep 30 2020 · At the initial stage of production the Refractory Materials for Ladle Lining of 120t ladle is made of alumina-magnesia machine-made bricks the thickness of the bottom brick is 300 mm and the thickness of the wall brick is 160 mm. In the early stage the life of the ladle can be up to 90 furnaces when it is cast directly on the ladle.
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(PDF) ENDLESS LINING OF LADLE BOTTOMS FUNDAMENTS
There have been numerous developments to improve the performance of the refractory lining of ladles after the slag line the bottom is one of the most solicited area as this section sup-ports the Description Ladle refractories are divided into working lining and insulating lining ladle refractories can be chosen according to different steel smelting process and composition of steel slag such as use integrally casting for normal steel ladle use MgOC brick for refining ladle use carbon-free ladle brick for low-carbon steel smelting.
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