Customized Designs Magnesia Carbon Brick for Steel Furnace 40Mpa Cold Crush Strength

 carbon brick mchine magnesia carbon brick for steel ladle refractory brick for steel furnace

 The application experience of magnesia-carbon brick in converter, electric furnace and ladle shows that it is very suitable for steel smelting because of its superior high temperature resistance, slag erosion resistance and good thermal shock stability.Magnesia-carbon brick is applied to the slag line and the steel outlet with serious erosion because of its high fire resistance, high slag resistance and solubility, and high temperature creep rate of magnesia which is difficult to be wetting by slag and molten steel.So far, huge economic benefits have been created due to the extensive use of magnesia-carbon bricks in the steelmaking process and improved iron and steel smelting technology.At present, magnesia-carbon brick has some shortcomings, such as high price graphite consumption, increasing heat consumption, and continuous carburization into molten steel, which pollutes molten steel. In order to reduce the cost of raw materials and pure molten steel, the low carbonization of magnesia-carbon brick can solve these problems well. 

The characteristics of magnesia-carbon brick are mainly reflected in the following aspects:
1. Tissue compactness of magnesia-carbon brick
The structure compactness of magnesia-carbon brick depends on the type and amount of binder and antioxidant, the type of magnesia, the particle size and amount of graphite, etc. In addition, molding equipment, brick pressing technology and heat treatment conditions all have certain effects.In order to ensure that the apparent porosity is below 3.0%, the forming pressure is 2t/cm2, and the bulk density of the matrix part can be enhanced to improve the corrosion resistance, magnesia-carbon bricks with particle size less than 1mm are used in the air eye brick and the steel outlet brick.Different binder also has certain influence on the compactness of magnesia-carbon brick. The volume density of magnesia-carbon brick is higher when the binder with higher carbon residue rate is selected.Add different antioxidant effect on the density of magnesia carbon brick are obviously different, and in 800 degrees, show porosity increases with the oxidation of antioxidants, after more than 800 degrees, do not contain metallic magnesium carbon brick show porosity does not change, but its containing metal show porosity decreased obviously, 1450 degrees to 800 degrees only half, add metal show the lowest porosity of aluminum magnesium carbon brick.
The heating rate of magnesia-carbon brick will also affect the change of its apparent porosity. Therefore, when magnesia-carbon brick is used for the first time, the temperature should be increased at a low speed as far as possible to make the binder decompose completely at a lower temperature. During the use of magnesia-carbon brick, the influence of temperature difference on porosity is also obvious, the greater the temperature difference, the faster the porosity increases.
2. High temperature performance of magnesia-carbon brick
2.1 High temperature mechanical properties Different additives have different effects on improving the high temperature strength of magnesia-carbon bricks. The research shows that for the high temperature bending strength above 1200℃, there is no additive.Calcium boride & lt;Aluminum & lt;Aluminum magnesium & lt;Aluminum + calcium boride <Aluminum magnesium + calcium boride, where aluminum magnesium + boron carbide between aluminum magnesium and aluminum magnesium + calcium boride.
2.2 Thermal Expansion Property The participation expansion value of magnesia-carbon bricks without metal addition is far lower than that with metal addition, and the participation expansion value increases with the increase of metal addition.
2.3 The thermal expansion and high temperature flexural strength of magnesia-carbon bricks are different in different directions under various anisotropy, which is mainly caused by the orientation of flake graphite. The principle and method of bricklaying with working lining are determined.Magnesia-carbon brick in vertical direction has higher high temperature strength and lower thermal expansion.

 Henan hongtai kiln refractory co., LTD. Is well aware that there are thousands of demands from customers, which can be summarized in four aspects: reliable quality, timely delivery, reasonable price and considerate service.The company will continue to adhere to the corporate spirit of "contributing to society and serving customers" and the business philosophy of "mutual benefit, win-win, integrity, efficiency, preciseness and responsibility".Our company is willing to develop a wide range of technical exchanges with colleges and universities and colleagues from all walks of life at home and abroad in a flexible and diversified way.

      Henan hongtai kiln refractory co., LTD. Main products are high alumina brick, clay brick, fused zirconium corundum brick, fireproof ball lightweight insulation brick, wear-resistant pouring material, corundum pouring material, low cement high strength pouring material, impermeable material, self-flowing material, plastic material, and various types of refractory materials.For different industries, the cement industry with anti-flaking high-alumina bricks, alkali resistant bricks, phosphate bricks; Boiler industry uses all kinds of brand wear-resisting brick, corundum brick, mullite brick and other finalizing materials.The company insists on "product quality is the life, enterprise integrity is the foundation", in the fierce market competition, won many users' trust and praise.The products are sold all over the country, as far as Vietnam, India, South Korea, Pakistan, Kazakhstan and other southeast Asian countries and regions.

     Henan hongtai kiln refractory co. LTD. : "quality first, reputation first, customer first" is our aim .Scientific management, strong technical force, perfect testing means, advanced technological equipment and stable product quality are the guarantee of quality service. Henan hongtai kiln refractories co., LTD sincerely hopes to cooperate with you hand in hand and in good faith.