Converter magnesia carbon brick

Changxing Refractory magnesia carbon brick factory is located in the magnesium capital of China, and products with high bulk density and low porosity.

Magnesia carbon brick for converter
Magnesite and graphite as the main refractory raw material for the converter lining made of magnesium carbon refractory material products.
Performance converter magnesia carbon brick with high temperature, slag resistance, good thermal shock resistance, high temperature strength and so on. But its disadvantage is easy to oxidize in use, can be improved by adding antioxidants. Its physical and chemical properties see table.
The main raw material for the production process is fused magnesia or high purity sintered magnesite and high purity graphite. Generally, MgO is larger than or equal to 95%, and the c content in graphite is more than or equal to 94%. With phenolic resin or asphalt as a binder, according to the use of conditions to select the appropriate additives, by ingredients, kneading, molding, heat treatment made after the finished product. (See magnesia carbon brick) used in the smelting process, due to the use of various parts of the converter conditions and damage are different. In order to achieve a balanced corrosion, for different conditions of use of the converter parts, the choice of MgO-C bricks grades and quality are also different.
Furnace mouth, furnace cap parts of the temperature changes drastically, by the slag corrosion is more serious, should use good thermal shock resistance, slag resistance of magnesia carbon brick. Trunnions on both sides in addition to the role of damage when blowing, the surface without covered with slag layer, easy to repair, easy to oxidize the brick. Should be masonry good slag resistance, good oxidation resistance of high quality magnesia carbon refractory brick. Slag line parts and slag long-term contact, by slag corrosion serious, to be masonry and into the direct impact of scrap and molten iron and erosion. Should be used with a strong anti-slag, high temperature strength, good thermal shock resistance of magnesia carbon brick. Hearth, the bottom of the furnace compared with other parts of the erosion of light, the choice of ordinary magnesia carbon brick, when the top and bottom composite blowing technology, especially at the end of CO2, O2 and other gases, the damage is more serious. Should use good oxidation resistance, good thermal shock resistance, high temperature strength, high slag resistance of high-grade magnesia carbon brick. According to the different parts of the converter, the corresponding performance of magnesia carbon brick is to improve the technical indicators of the converter and effective method.

Application of magnesia carbon brick in Converter Lining

Changxing Refractory is able to manufacture magnesia carbon brick for every ladle, EAF, and BOF. We will design you a well-balanced lining, providing optimal performance at the lowest possible cost. Our magnesia-carbon brick is made from more than 98% electrically fused magnesite, high purity graphite and metallic antioxidants as needed. Size and specification can be tailored according to furnace type. 

In the smelting process, the use of various parts of the converter conditions, damage is different, for different conditions of use of the various parts of the converter, the masonry refractories are not the same.
(1) furnace mouth: As the furnace temperature changes drastically, slag and high temperature exhaust scouring more powerful, and in the removal of scrap and feeding, the furnace was hit, so the furnace for the refractory material must have a high resistance Thermal shock resistance and slag resistance, to resistance to slag and high temperature exhaust scour, and not easy to hang steel and easy to clean.
(2) furnace cap: the furnace cap is the more serious parts of the slag corrosion, but also by the temperature changes, as well as the oxidation of carbon and dust, such as the role of scouring, so the need for strong slag resistance and thermal shock resistance magnesia carbon brick.
(3) Filling side: The splashing of slag and molten steel is easy to cause chemical erosion, abrasion, erosion, and charging on the charging side. It is also affected by the direct impact and erosion of scrap and molten iron Serious mechanical damage, so the requirements of MgO-C bricks in addition to a high slag resistance and a high high temperature strength, but also must have a very good thermal shock resistance, usually by adding antioxidant high-strength magnesia carbon brick.
(4) the steel side: the steel side of the basic damage from the mechanical damage when the thermal shock is also smaller, but by the tapping of molten steel when the thermal shock and erosion, damage faster than the loading side of the small When the same material as the charging side is used, in order to maintain the equilibrium life of the converter charge, we use masonry with a thickness in the form of a thin side.
(5) slag line parts: slag line is the long-term contact with the slag and slag corrosion serious parts, in the tapping side, with the slag position with the tapping time changes, and more obvious. In the slag side, due to the strong impact of the slag erosion and the other effects of the abdomen caused by the abdomen in the process of blowing, the damage is serious, so we need to masonry with good slag resistance of magnesia carbon refractory brick.
(6) trunnion on both sides: both sides of the trunnion in addition to the role of damage when blowing, the surface of the protective layer of the cover, not easy to repair, so the charge material in the carbon easily oxidized, and thus damaged, Excellent slag resistance, high oxidation resistance of high-grade magnesia carbon brick.
(7) hearth and bottom: these parts in the blowing by the severe scouring of molten steel, but compared with other parts of the damage to a more tired, the choice of low carbon content of magnesia carbon brick can also be used tar dolomite brick The When the high-speed blowing and the pool is too shallow, the bottom of the furnace site damage may be serious. In addition, when the use of bottom blowing, these parts of the damage may increase, should be used and the furnace side of the same material.

Magnesium Carbon Brick Product Consumption Knowledge

Changxing Refractory magnesia carbon brick factory is located in the magnesium capital of China, and products with high bulk density and low porosity.

Magnesia carbon brick is a kind of important refractory used in steelmaking converter, steel making electric furnace, steel refining furnace and its ladle as lining (lining). As the erosion resistance, not easy to slag, so the use of magnesia brick can significantly improve the life of steel-making furnace (bag).
MgO-C bricks is the use of high-quality fused magnesia, high purity flake graphite, metal additives and other raw materials, phenolic resin as a binder by high-pressure molding, about 200 ℃ heat treatment made of a refractory products. High quality magnesium carbon brick to ensure the service life and safety, the use of poor quality magnesium carbon brick masonry furnace easy to burn, the occurrence of running steel, leakage of steel, casualties and other vicious accidents, so the procurement must be good Quality off.
The appearance of the black and white carbon brick products, the appearance of oil black shiny, cross-section neat; poor magnesia carbon brick product appearance rough white point, cross-section has a layer, resulting in particle segregation, and particles continue.
magnesite carbon bricks physical and chemical indicators with the naked eye is difficult to judge, the user can randomly send the authority to send the department for quality inspection. GB / T 22589-2008 "magnesium carbon brick" requirements of the physical and chemical indicators are as follows: MgO content, C content, significantly porosity, bulk density, room temperature compressive strength, high temperature bending strength.
Magnesium carbon brick is easy to hydrate, so the MGO brick manufacturers must be kept in the rain, moisture-proof warehouse. Packaging and transportation should also take measures to prevent rain and moisture, the product once the damp, product quality will decline, serious will lead to magnesium carbon brick products scrapped.