Magnesium carbon bricks were developed as an electric furnace application. The first applied experiment in the turntable began in 1970. After 6 years of official promotion and use, Kawasaki Iron and Steel Company first used the magnesium carbon brick binding of resin to the bottom of the turntable furnace and the air outlet. The precedent for the application of the composite refractory material containing graphite -containing graphite containing graphite. The magnesium carbon bricks combined with asphalt are raised by Western Europe. Generally, magnesium carbon bricks are magnesium and scale graphite as binding agents to add armal solid resin, and non -brick bricks with or not anti -oxidant. In recent decades, due to the increasingly demanding smelting conditions and continuous changing steel smelting production technology, high requirements have been put on magnesium carbon resistance materials, mainly focusing on improving the process, improving quality and use effects, and good results have achieved good results. The following is the choice of magnesium carbon brick raw materials for reference! This is about the frist choice of Magnesia carbon brick raw materials.
Graphite has a layer -like structure. The atoms in the layer are combined with a strong covalent key hexagonal arrangement. Fan Dewali between layers and layers makes it have a strong directional opposite sex. The layers and the entire surface contain lower energy, almost no wet liquid high -temperature slag and steel water. Graphite has high thermal stability and does not melt. The ion movement is very limited. The combination of ions between magnesium oxide oxide in magnesia carbon bricks cannot be combined with the combination of the common price bond of graphite. The binding agent of the two items is to form a network structure and obtain a greater intensity. However, it has a free price key on the boundary to adsorb various substances. Scales -shaped graphite has higher antioxidant properties than other carbon products, and this antioxidant resistance is also improved.
The purity of scales -shaped graphite and the amount of adding amount have a very important impact on the performance of magnesium carbon bricks. Its appropriate amount can effectively inhibit the inside of the tissue of the fire -resistant material tissue. Studies have shown that the magnesium carbon brick with a carbon content of 15%has a good anti -slag erosion performance. The main factors that directly affect the performance of magnesium carbon bricks and the effect of use include fixed carbon content in graphite, graphite particle size, shape, and volatile points. The more the addition, the more gray brought in. The purity of the graphite affects the anti -peeling performance of magnesium carbon bricks and the size of the high temperature resistance. At the operating temperature, the silicon oxide and iron oxide are easily restored and the graphite is oxidized during use, so it is particularly harmful to magnesium carbon bricks. With the increase of the carbon content, the volume density of magnesium carbon bricks decreases, the strength of normal temperature, and the sharp decrease in the anti -erosion index, the impact of high temperature resistance strength has not significantly, but the resistance of the anti -peeling drop has increased. In short The types of types, different parts, and their respective operating conditions are related to the use of magnesium carbon bricks to emphasize erosion resistance or thermal shock stability performance, or to determine high -strength or antioxidant capabilities.
