Two Reasons for the Damage of Magnesia Carbon Bricks

RS Cheap refractory brick manufacturer, based on years of experience in the production and sales of refractory bricks, as well as the damage characteristics of our refractory brick linings during actual use, has summarized the two main reasons for the damage of magnesia carbon bricks.

Magnesia Carbon Bricks Resistant to Slag Erosion

The damage process of magnesia carbon bricks. The damage of magnesia carbon bricks is first caused by the oxidation of carbon in the bricks, forming a decarburized layer. In addition, the thermal expansion rates of magnesium oxide and graphite are very different at high temperatures. At 1000°C, they are 1.4% and 0.2% respectively, resulting in loose tissue structure and reduced strength. After being eroded by slag, mechanical erosion, etc., the magnesium oxide particles in the bricks are gradually eroded and fall off layer by layer, causing damage to the magnesia carbon bricks. The damage process of https://cheapfirebricks.com/magnesia-carbon-brick is: oxidation → decarburization → loosening → erosion → erosion → falling off → damage. A large amount of research work has proven that above 1600°C, the following reactions are the main reasons for the damage of magnesia carbon bricks.

MgO(s)+C(s)→Mg(g)+CO(g) (1)

The damage to magnesia carbon bricks is first caused by the oxidation of carbon in the hot surface of the working lining, forming a thin decarburization layer. The oxidation of carbon is the result of continuous oxidation by iron oxides in the slag and O2 in the air as well as CO2, SiO2 and other oxides. And the vaporization effect of MgO dissolved in molten steel or bricks on carbon. Secondly, high-temperature liquid slag penetrates into the pores of the decarburized layer or cracks caused by heat, and reacts with the magnesium oxide in the brick to form a low melting point compound. Causes the surface layer of bricks to undergo qualitative changes and weaken. Under the action of strong steel slag agitation, mechanical erosion and other stresses, the layers of magnesia carbon bricks fall off layer by layer, causing damage to the magnesia carbon bricks. Repeating this cycle, the furnace lining becomes thinner layer by layer, and eventually the furnace is repaired, repaired, and stopped.

(1) Oxidation of Carbon

The damage of magnesia carbon bricks is first caused by the oxidation of the carbon in the bricks. The oxidation of carbon proceeds through the following reaction:

Fe0+C→Fe+CO (2)

O2+2C→2CO (3)

CO2+C→2CO (4)

SiO2(s)+C(s)→SiO(g)+CO(g) (5)

MgO(s)+C(s)→Mg(g)+CO(g) (6)

Due to the oxidation of carbon, the carbon network structure in the brick is destroyed, resulting in loose tissue structure, reduced product strength, increased pores, and intensified erosion of the brick by slag.

(2) Influence of Pores

The pores in magnesia carbon bricks, especially open pores, have an important impact on the damage of magnesia carbon bricks. During the use of magnesia carbon bricks, the oxidation damage of carbon is mainly caused by the pores, which in turn intensifies the erosion of the brick lining by the slag, thereby causing damage to the magnesia carbon bricks. Open pores present in the brick that draw air in from the outside as it cools. During reheating, the oxygen in the air reacts with the surrounding carbon to generate CO and is discharged. This process repeats itself, causing the porosity to increase. In addition, the binder present in magnesia carbon bricks is an important factor in the generation of pores.

As the binder of magnesia carbon bricks, phenolic resin is generally used. By adding 3% to 4% phenolic resin, the porosity after molding is low, about 3%. However, during use, the phenolic resin is heated and decomposed, producing H2O, H2, CH4, CO, CO2 and other gases that evaporate and are emitted. The gas evaporation path forms pores, which also increases the porosity. In this way, the oxygen present in the air and the oxides in the slag will corrode the bricks through the pores. On the one hand, it promotes the oxidation damage of carbon, on the other hand, it intensifies the reaction between slag and MgO in the bricks, causing damage to magnesia carbon bricks. This process starts over and over again, through the oxidation of carbon and the erosion of slag. On the one hand, it destroys the carbon network structure in the brick, making the organizational structure loose and the high-temperature strength reduced. On the other hand, low melting point compounds are formed on the surface of the bricks, which weaken and deteriorate. As a result, the magnesia carbon bricks fall off layer by layer under the action of strong steel slag agitation, mechanical erosion, thermal shock and other stresses, causing damage to the magnesia carbon bricks.

High Quality Magnesia Carbon Brick Manufacturer

Magnesia-carbon bricks are made of magnesia, dead-burned magnesia, fused magnesia, high-purity magnesia, high-quality graphite, and bauxite additives. The price and performance of magnesia carbon bricks have a lot to do with the graphite content in the bricks. As the graphite content increases, the strength of the brick decreases, the thermal expansion rate decreases, and the residual expansion rate increases. Therefore, the graphite content in the brick should be controlled at about 20%. RS Cheap Fire Bricks Factory can supply high-quality premium Magnesia Carbon Bricks for Ladles. To buy magnesia carbon bricks, please choose a high-quality magnesia carbon brick manufacturer.

Alumina Magnesia Carbon Bricks in Rongsheng

Magnesia Carbon Brick for Ladle Slag Line

Magnesia-carbon bricks have low wettability to slag, excellent spalling resistance, and corrosion resistance, and are suitable for the slag line of the ladle, especially for the occasion of continuous pouring of multiple furnaces. In order to meet the needs of producing clean steel, the application site of magnesia carbon bricks has expanded from the slag line to the side wall during refining in the ladle.

When building magnesia-carbon bricks on ladles, care should be taken not to mix them with bricks with high SiO2 content. Otherwise, the local melting loss of magnesia carbon bricks will be increased. Magnesia-carbon bricks are mainly used in the furnace lining and taphole of steelmaking oxidation conversion furnaces, and the hot spots of high-power electric furnace walls. As well as the lining of the refining furnace outside the furnace, the slag line of the steel ladle, etc.

During the smelting process, the conditions of use and damage of each part of the converter are different. In order to achieve balanced corrosion, the grade and quality of the selected magnesia carbon bricks are also different for each part of the converter under different operating conditions.

Magnesia Carbon Bricks Used in the Steel Ladle

The temperature of the furnace mouth and the furnace cap changes drastically, and the slag corrosion is more serious. Magnesia carbon bricks with good thermal shock resistance and strong slag resistance should be selected. In addition to being damaged by blowing on both sides of the trunnion, there is no protective slag layer cover on the surface, which is not easy to repair, and the carbon in the brick is easy to oxidize. High-quality magnesia-carbon bricks with excellent slag resistance and good oxidation resistance should be built. The slag line part is in long-term contact with molten slag and is seriously corroded by slag. It is necessary to build magnesia carbon bricks with excellent slag resistance. The splashing action of slag and molten steel during oxygen blowing on the charging side is likely to cause chemical erosion, abrasion, erosion, and direct impact and erosion of scrap steel and molten iron on the charging side. Magnesia carbon bricks with strong slag resistance, high-temperature strength, and good thermal shock resistance should be selected. The hearth and furnace bottom are less eroded than other parts, and ordinary magnesia-carbon bricks can be used. When the top-bottom composite blowing technology is used, especially when CO2, O2, and other gases are blown at the bottom, the damage is more serious. High-grade magnesia-carbon bricks with good oxidation resistance, good thermal shock resistance, high-temperature strength, and strong slag resistance should be selected. According to the use of different parts of the converter, the selection of converter magnesia carbon bricks with corresponding performance is an effective way to improve the technical and economic indicators of the converter.

Magnesia Carbon Bricks Resistant to Slag Erosion

The raw material for preparing magnesia-carbon bricks is fused magnesia with a MgO content of 98%. Magnesia carbon bricks are characterized by their low porosity, resistance to slag erosion, thermal shock resistance, and high-temperature strength. They are mainly used in basic oxygen furnaces, mid-grade magnesia, ladle slag lines, and electric arc furnace hot spots. Magnesia carbon brick is a high-quality refractory material. Their main components are magnesia and carbon, wherein the magnesia content is 60-90%, and the carbon content is 10-40%. This material is made of high-purity magnesium oxide particles, carbon materials, tar, pitch, or resin and baked at high temperatures. These magnesia refractory bricks have the characteristics of slag corrosion resistance, thermal shock resistance, thermal conductivity, and so on.

Magnesia carbon brick is an unburned carbonaceous composite refractory material, which is made of magnesia with a high melting point (2800°C) basic oxide and a high melting point carbon material. The material is resistant to attack by slag, and various non-oxide additives and carbon binders are added.

The magnesia contained in magnesia carbon bricks depends on the material used. Common magnesia carbon bricks mainly include 72% magnesia, 74% magnesia, 76% magnesia, 80% magnesia, 82% magnesia, and 85% magnesia. Ladle magnesia-carbon bricks, The main raw materials used in the production of magnesia-carbon bricks are fused magnesia, graphite, metal aluminum powder, metal silicon powder, and liquid phenolic resin, which are stirred by a sand mixer and pressed by a press. Magnesia-carbon bricks are used in refining ladle slag lines, and magnesia-carbon bricks are also used in AC electric arc furnaces, DC electric arc furnaces, converters, and other furnace linings.

Electric furnace magnesia carbon brick steelmaking is equipment that uses the arc generated between graphite electrodes as the heat source for steelmaking. It is divided into DC electric furnace and AC electric furnace, among which AC electric furnace accounts for the majority. In this work, according to the damage mechanism of the electric furnace, the magnesia-carbon bricks suitable for the electric furnace were developed and produced.

To learn more about the price information of magnesia carbon bricks, please contact us. We can customize magnesia carbon bricks, ladle refractory lining materials, etc. according to your working conditions.

Where to buy Magnesia Carbon Brick for Electric Arc Furnace Lining?

Magnesia carbon brick is a type of refractory brick used in the electric arc furnace lining as a safety measure. An electric arc furnace is designed to contain extreme temperatures, pressure, and corrosion, thus making it a very dangerous piece of equipment, and safetyitating measures be taken to protect those that work near it. Magnesia-carbon brick for electric furnaces refers to a refractory product for electric furnaces made of magnesia and graphite as raw materials. Because this kind of brick has the characteristics of high fire resistance, high corrosion resistance, excellent heat peeling resistance and high-temperature volume stability, high thermal shock resistance, etc., it has been popularized and applied quickly. Magnesite carbon bricks are an effective solution to this problem, as it is able to withstand and survive the conditions of an electric arc furnace, thus providing protection from accidental injury or damage to property.

When it comes to finding a quality mag carbon bricks for your electric arc furnace lining, your first point of contact should be your refractory lining materials manufacturer or supplier. Many manufacturers or suppliers will be able to provide you with the specific type of design to meet the listed requirements and can provide further advice on which type of brick will be most suitable for your electric arc furnace. Additionally, you can also research purchasing options online to find the best price and quality available. Rongsheng refractory brick manufacturer is a powerful refractory brick manufacturer and sales manufacturer, providing high-quality refractory brick lining products and refractory lining solutions for the refractory lining of various industrial kilns.

When looking to purchase Magnesia carbon brick (https://cheapfirebricks.com/magnesia-carbon-brick/), there are several factors you should consider. These include the manufacturer or supplier, the size and shape of the brick, and the material it is made from. You should also ensure that the brick meets the standards for Safety and quality specified by the furnace manufacturer or supplier. Additionally, it is important to consider the fire resistance of the brick, which can help to ensure the safety and longevity of the electric arc furnace lining.

Finally, it is also important to consider the cost of Magnesia carbon brick. The cost of purchasing and installing the brick, as well as the ongoing cost of maintenance, could all potentially be significant, so making sure that you are purchasing a quality brick at a Competitive price is the key to ensuring the long-term success of your electric arc furnace.
Overall, purchasing magnesite carbon bricks for your electric arc furnace lining is the only way to ensure the safety of those working near the furnace and the protection of property. Considering the manufacturer or supplier, size and shape, material, fire resistance, and cost are all important factors to consider when looking to purchase mag carbon bricks.

One great source of magnesia carbon brick for electric arc furnace lining is Rongsheng. Which is an experienced leader in the industry, providing high-quality products coupled with excellent customer service. They have an extensive range of products, which includes magnesite carbon bricks, along with an array of other bricks and castables. In addition, they offer competitive pricing with discounted rates for larger orders.

Another advantage of Rongsheng Refractory supplier of magnesia carbon brick for electric arc furnace lining is, they have over two decades of experience in the refractory industry and are highly regarded for the quality of their products. Their mag carbon bricks are some of the toughest in the industry and come in different sizes to suit a variety of needs. They also offer competitive pricing, with discounts available for larger orders.

Finally, magnesia carbon brick for electric arc furnace lining, Rongsheng company has a reputation for providing high-quality products and great customer service. They offer a wide selection of refractory products and are consistently extending their supply chain to meet customer needs. In addition, they have competitive pricing and are willing to negotiate special deals with customers.

The Rongsheng mag carbon bricks for electric arc furnace lining provides quality products and great customer service, which is essential for businesses that use electric arc furnaces. When considering where to purchase magnesia carbon brick for electric arc furnace lining, it is important to take into account factors such as quality, price, and product availability in order to make the best decision.

In summary, Where to buy Magnesia Carbon Brick for Electric Arc Furnace Lining? From Rongsheng Refractory Bricks Factory. And it is necessary to choose a strong magnesite carbon bricks refractory brick manufacturer with guaranteed product quality and certain after-sales service capabilities.