Market distribution of magnesia carbon brick

Dashiqiao Dongfang magnesia refractories Co., Ltd. will develop rapidly with the increase of the proportion of amorphous refractories in refractory Liaoning magnesia chrome bricks. At the same time, the varieties and quality of castables will also be improved accordingly. The emphasis will be on the development of low cement, ultra-low cement and cement-free refractory castables. In combination with resource conditions, homogenization and high-quality raw materials and special aggregates will be selected In order to improve the properties of refractory castable, fiber reinforced castable and self flowing castable were studied and popularized.

In the past classification of Dashiqiao Dongfang magnesia refractories Co., Ltd., clay was listed in acidic raw materials, which was not suitable. The acidity of refractory materials is mainly based on free silica (SiO2), because according to the chemical composition of refractory clay and silica raw material, the free silica in refractory clay is much less than that in siliceous raw material. Because there are 30% ~ 45% alumina in general refractory clay, and alumina is rarely in free state, so it must be combined with silica to form kaolinite (Al2O3 · 2SiO2 · 2H2O). Even if there is excess silica, the amount is very small and the effect is very small. Therefore, the acid property of refractory clay is much weaker than that of siliceous material. Some people think that the refractory clay decomposes into free silica and free alumina at high temperature, but this is not the same. When the refractory clay is heated continuously, the free silica and free alumina will combine to form mullite (3Al2O3 · 2SiO2). Yinglaite has good acid resistance to alkaline slag. Meanwhile, due to the increase of alumina content in refractory clay, its acid substance gradually weakens. When alumina reaches 50%, it will appear alkaline or neutral properties. Especially, clay brick made under ultra-high pressure has high density, fine and compact, low porosity, and its resistance to alkaline slag is stronger than that of silica at high temperature. In terms of its erosivity, Yinglai stone is also very slow, so we think it is appropriate to list refractory clay as semi acid raw material. Refractory clay is the most basic and widely used raw material in refractory industry.

Liaoning magnesia carbon brick

At present, there are nearly 100 large and medium-sized iron and steel enterprises in China, and more than 80% of them adopt continuous casting process. According to the calculation and analysis of relevant data, the annual consumption of refractories for tundish in China alone is more than 300000 tons, so the market prospect is very broad. Moreover, the product uses non-toxic binders and additives to solve the problem of environmental pollution, avoid harm to human body, and greatly improve the service life of tundish. The development of green environment-friendly refractories is the development trend of refractories in the future. In addition, the demand for the products in the foreign market is increasing year by year. Therefore, the products have strong market competitiveness, huge export potential and high economic benefits.

The PN series of magnesia alumina carbon brick adopts special grade bauxite or corundum as aggregate and focuses on strengthening matrix. Phenolic resin is used as binder. Magnesium carbon brick manufacturer adopts machine press molding. It has the characteristics of anti-corrosion, anti peeling and high strength, which is suitable for ladle bottom and wall.

The PN series magnesia alumina carbon brick of Dashiqiao Dongfang magnesia refractory Co., Ltd. has adjusted the process and technology on the basis of the alumina magnesia carbon brick, which has enhanced the corrosion resistance and spalling resistance of the material. It is suitable for the ladle bottom and wall, and can significantly improve the service life of the ladle. The application of carbon in refractories has been widely used in metallurgical industry. In the past, in order to adapt to the development of new metallurgical technology and refractory technology, many new products have been developed. Refractory experts have known for a long time that different forms of carbon exhibit excellent properties of magnesia alumina carbon bricks in refractories. In the refractory oxide, carbon can reduce the wettability of slag, molten steel and refractory, increase its thermal conductivity and reduce its expansion, so that the refractory has excellent thermal shock resistance. In addition, carbon has high thermal stability, and its sublimation temperature is about 4000 ℃. The three-phase point (solid / liquid / gas) of carbon in the phase diagram is close to 4020 ℃ at the pressure of 110 ~ 140bar. Therefore, when the pressure is lower than 110bar, the carbon sublimates without melting. Because carbon is oxidized at high temperature, the above results can only be applied under specific conditions.