Steel Ladle Refractory Mateial Introduction
Steel ladle is a container for carrying steel for steelmaking electric furnace to be transported to the tundish or pouring site by special rail. The steel ladle is divided into working layer and thermal insulation layer by refractory material. The refractory material for ladle is used according to the smelting steel type process and steel slag composition. Steel ladle lining is composed of a permanent layer, a working layer, a slag line layer and a heat insulation layer.the steel ladle each part is different, the refractory materials used are also different, so different parts are applied according to the characteristics of the refractory brick.
Refractroy material Used in Working Layer
1. Refractroy Material Used in Working Layer Characteristic
A. Refractroy material of working layer have high temperature resistance, high strength and good volume stability.
B. Refractroy material of working layer have better insulation performance and reasonable solidification time.
C. Refractroy material of working layer have good resistance to erosion, erosion and thermal shock resistance.
2.Refractory Bricks Application in Steel Ladle of the Working Layer
A. Magnesia carbon brick used in working layer for the steel ladle. Magnesia carbon refractory brick is mainly used for the working layer, magnesia carbon fire bricks is especially suitable for multi-furnace continuous casting. The MgO content in refractory bricks is generally around 76%, and the C content is between 15% and 20%. Refractory bricks characteristic is that the slag is less erosive, refractory magnesia bricks is resistant to erosion and flaking.
B. High alumina bricks used in working layer for the steel ladle. The alumina content in the refractroy brick is between 50% and 80%,alumina refractory bricks is mainly used for the working layer of the ladle.
C. Aluminum magnesia carbon brick used in working layer for the steel ladle, the fire brick is developed on the basis of aluminum-magnesium castables, alumina magnesia carbon brick is used for ladle lining and has a long service life.
If the steel ladle itself is also used for refining, steel ladle is also possible to select MgO-Cr203-A1203 series and MgO-CaO-C type refractories, mainly including: magnesia chrome brick, magnesia chrome aluminum brick, dolomite refractory brick , what’s more, the working layer is made of magnesium spray and alumina magnesia repair refractory material.
3.Refractory Castable Application in Steel Ladle of the Working Layer
A. Corundum spinel refractory castables are integrally cast and lining materials, corundum spinel refractory castables have the advantages of convenient construction and no joints.
B. Aluminum magnesium castables are mainly used for steel inclusions,refractory castable is characterized in that under the action of molten steel, MgO and Al2O3 in the castable react to form aluminum magnesium spinel, refractory casting improves the slag resistance and thermal shock resistance of the inner liner.
C. Magnesium ramming material for ladle joint filler, Magnesium ramming material is made of magnesium raw materials and additives. Magnesium rammming has the characteristics of corrosion resistance, erosion resistance and convenient construction. Magnesium refractory ramming is used for caulking around the bottom brick of the ladle and around the bottom brick of the tundish.
Refractroy Material Used in Slag Layer
1.Refractory Bricks Application in Steel Ladle of the Slag Layer
A. Magnesia carbon brick and magnesia chrome brick should be selected the slag line layer, refractory bricks are resistant to corrosion, slag corrosion, thermal shock stability and high temperature structural stability.Due to magnesia carbon refractory bricks and magnesia chrome bricks can overcome the structural spalling caused by the collapse of molten steel and slag.
B. Zircon refractory bricks are mainly used for the steel ladle slag line. The ZrO2 content in refractroy bricks are generally between 60% and 65%. firebricks are characterized by good corrosion resistance.
C. Magnesia carbon brick used in working layer for the steel ladle. Magnesia carbon refractory brick is mainly used for the steel ladle slag line, magnesia carbon fire bricks is especially suitable for multi-furnace continuous casting. The MgO content in refractory bricks is generally around 76%, and the C content is between 15% and 20%. Refractory bricks characteristic is that the slag is less erosive, refractory magnesia bricks is resistant to erosion and flaking.
Refractroy Material Used in Permanent Layer
1.Steel permanent layer requires low heat conductivity, good heat insulation performance, and requires sufficient room temperature and high temperature strength to resist the impact of molten steel for a short period of time and prevent the occurrence of wear accidents.
2.Clay fire bricks are used for the permanent layer, alumina magnesia carbon bricks for the bricks, magnesia refractory clay for the masonry, and the permanent layer can be made of high alumina refractory castable.
3.The fire bricks of the permanent layer should be made of alumina magnesia carbon bricks with good thermal shock resistance and the corrugated corrugated nozzle bricks with corrosion resistance and erosion resistance.
4.Blowing refractory bricks can be selected from chrome corundum fire bricks or chrome corundum spinel brick permeable bricks.
Refractroy Material Used in Insulation Layer
1.Ceramic fiber felt for ladle insulation in the steel ladle, the ceramic fiber felt have good characteristic of high compressive strength and long service life, low heat capacity, low thermal conductivity, easy to install and convenient to construct, the heat preservation effect is good and the performance is stable.
2.Aluminum carbon brick for ladle nozzle area, the alumina carbon refractory bricks have good characteristic of stable structure, erosion resistance, erosion resistance, and good thermal shock stability and long service life.
3.Steel bag bottom breathable brick with corundum refractory bricks or chrome corundum firebricks, the fireproof bricks have good feature of breathable bricks have high refractoriness, good thermal shock stability, good resistance to slag erosion and peeling resistance, and the load softening temperature is high, the creep is small, and the heat shrinkage rate is small.
Refractory Material Selection Condition for the Steel Ladle
1. Working conditions of ladle, such as tapping temperature, residence time of molten steel, type of cast steel, refining treatment.
2. The part of the ladle refractory in the ladle.
3. The alkalinity of the slag.
4. Working conditions and economic age of masonry ladle, steel ladle and bake ladle of steel mill.
5. Economics
Refractory Material for the Steel Ladle Supplier in RS Refractory Manufacturer
RongSheng refractory manufacturer not only supply the refractory bricks and refractory castable in the working layer, insulation layer, permanent layer, slag layer but also provide the upper and lower nozzles of the ladle adopt the advantages of corundum and corundum spinel as the main refractory raw materials, excellent stability, outstanding oxidation resistance and outstanding anti scour ability.
Rongsheng refractory bricks factory supply aluminum carbon, aluminum zirconium carbon, magnesium spinel, high temperature fired skateboard with high strength, erosion resistance, good thermal stability.
