1. Chemical component and mineral composition
The chemical component of magnesia brick and varies with the raw materials composition. General magnesium oxide is 55% ~ 60%, the amount of chromium trioxide is about 10%, followed by ferric oxide and a small amount of oxide such as two aluminum dioxide aluminum, silica, calcium oxide and other impurities.
The mineral composition of magnesia brick is mainly magnesium chromium spinel acid magnesium ferrite.
2. Because periclase content of magnesia brick is less than magnesia brick, magnesia chrome spinel and magnesium ferrite content is much , and their melting point of eutectic compounds is lower, so the refractoriness of magnesia chrome brick magnesia brick is low, usually only 1850 ~ 1960 ℃.
3. Refractoriness under load
Periclase crystals of magnesia brick and magnesia chrome spinel is easy to form a mesh skeleton, by filling in the internet clearance of low melting point no quality is less, when bear high temperature load, while the low melting point material softening, but mesh skeleton still can support the load, so the magnesia brick of refractoriness under load is high, average more than 1550 ℃.A little lower than magnesia brick refractoriness, and refractoriness under load is higher than magnesia brick is a significant characteristic of magnesia chrome brick.
4. Thermal expansion and thermal shock resistance
Magnesia chrome spinel of magnesia brick and magnesium ferrite content is much and linear expansion coefficient is small, at the same time, the porosity of magnesia chrome brick is larger than magnesia brick, so, heat dilatability of magnesia chrome brick is small.
Monticellite content in magnesia brick is few, is not easy to cause differential expansion stress. Magnesium ferrite solid soluble in magnesia chrome spinel, solubility temperature range is very wide, Magnesium ferrite into and precipitation, not make a big stress, therefore, magnesia chrome brick has good thermal shock stability, water-cooled frequency can be up to among 25 times.
5. The slag resistance
The most content of magnesia chrome spinel in magnesia brick is compound of magnesium oxide and chromium trioxide, and chromium trioxide is a typical neutral oxide, therefore, magnesia brick of alkaline and acidic slag has strong ability of resistance.
The raw material of magnesia brick is magnesite, whose basic component is MgCO3, which is calcined at high temperature and then broken to a certain particle size to become sintered magnesia. Magnesia is widely used as furnace repair materials and ramming materials. Magnesia with less impurities (ω (CaO)
There are different grades of magnesia carbon brick. And it is usually used for the lining and tap hole of steelmaking converter, the sidewall and slag line of high power electric ARC furnace and ladle slag line.
magnesia
There are many types of refractory bricks available. Those are Andalusite Bricks, Dense Silica Brick for Glass Furnace, Corundum Mullite Brick, Corundum Brick, Fireclay Brick for Coke Oven, Fireclay Brick for Blast Furnace, Low Creep High Alumina Brick for Hot Stoves, High Alumina Bricks for Blast Furnaces, General Refractory Fireclay Brick, General High alumina refractory brick, Insulating firebrick, Silica bricks-coke oven refractories, Magnesia brick, Magnesia Bricks for Cement Industry, High Alumina Bricks For Cement Industry, Fused cast Bricks, Sillimanite Bottom Blocks, Low Porosity Fireclay Bricks, Zirconia Bricks, General fireclay brick for steel industry, Refractory insulating fire brick B&C series, Insulating bricks etc.
Best of Five - 2008 Gutsiest Performances was released on: USA: 16 September 2012
yes it is
There are several places that have or had the name Magnesia, with notable ones including Magnesia ad Sipylum in ancient Anatolia, Magnesia on the Maeander in ancient Ionia, and Magnesia al Maeur in modern Greece.
brick, and five bedrooms
Magnesia is not an element but magnesium is in group 2A
Magnesia Nova was created in 1995.
Battle of Magnesia happened in -190.
Magnesia Prefecture ended in 2011.