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Magnesite-chrome Bricks

Magnesite-chrome Bricks

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Magnesite chrome bricks in magnesium oxide (MgO style) and chromium trioxide (Cr2O3) as main component, and periclase spinel as main mineral components of refractory products.This kind of bricks of high refractoriness, high temperature strength, strong alkaline slag erosion resistance, good thermal stability, also has certain adaptability for acid slag.The main raw material of manufacturing magnesite-chrome brick is sintered magnesite and chromite.Magnesia raw material purity as high as possible, chromite chemical composition requirement is: the Cr2O3:30 ~ 45%, CaO: 1.0 ~ 1.5% or less.

Production technology of calcined magnesite chrome bricks in line with magnesia brick.In order to eliminate the bricks in burning process because of MgO style and Cr2O3, Al2O3, or
Directly combined magnesite chrome brick
Directly combined magnesite chrome brick
Iron oxide reaction caused by the expansion of the spinel as of loose effect, also can use common sintering synthetic materials made from magnesite chrome brick.In addition, there is not burned magnesite chrome brick, for example, combined with inorganic magnesium salt solution is not burned

magnesite chrome brick.Don't burned magnesite chrome brick production technology is simple, low cost, heat stability, but the high temperature strength far less burnt brick.The late '50 s, develop a socalled "direct combination" magnesite chrome brick.The characteristics of this kind of brick is

pure raw materials, sintering temperature is high, the periclase, spinel, such as direct combination between high temperature phase, such as low silicate phase for the island shape distribution, therefore, significantly improve the high temperature strength and slag resistance of the brick.
With chrome ore - magnesia compact grinding calcined after fine powder, and magnesia bricks made of coarse particle with method, is an

effective measure to eliminate the effect of loose.Magnesite chrome brick made of using this method, compared with common magnesia chrome brick, brick of low porosity, compressive strength, high refractoriness under load and the bending strength.With chrome ore - magnesite powder compact, high-temperature synthesis of calcined magnesite chrome magnesia-chrome brick made of sand, slag resistance and high temperature strength are better than other magnesite chrome brick.
In addition, there is electricity solitary furnace molten magnesite chrome material directly casting and fused magnesite chrome brick

(see figure of microstructure, see image), electricity melt magnesium chrome material according to the production of brick melt granule recombination magnesite chrome brick, etc.

Q:What are the main raw materials of magnesia chrome bricks?
At present the most widely used are magnesium aluminum alloy, followed by magnesium manganese alloy and magnesium zinc zirconium alloy. Mainly used in aviation, aerospace, transportation, chemical, rocket and other industrial sectors. In practical metals, it is the lightest metal, and the specific gravity of magnesium is about 2/3 of aluminum and 1/4 of iron. It is the lightest metal in practical metals, high strength and high rigidity.
Q:Refractory brick, high alumina brick, magnesia chrome brick, magnesia brick, clay brick, which type of high temperature refractory brick?
High alumina brick clay brick up to 1700 degrees above 1500 degrees -1750 degrees of magnesia brick and magnesia chrome brick 1500-1650 degrees.
Q:Magnesium chrome brick price?
Magnesia brick factory with strong technology foundation as the basis, has developed more than 40 varieties of products, including building materials, non-ferrous metals, iron and steel and other fields, won the national high-tech products nearly a dozen, four patents, including magnesia spinel brick reached the world advanced levelFrom July 2006 to now won the high-tech enterprises in Liaoning province; National Standardization Management Committee issued the "adopting international standard product certificate" enterprises; in 2009 passed the ISO9001 quality management system certification; the famous brand products of Liaoning Province certificate certificate and certificate management, the reliable guarantee for the quality of products.
Q:What are the differences between magnesium chrome bricks, such as direct bonding, re bonding, semi bonding, CO sintering and chemical bonding? Hope expert advice..
The process of firing magnesia chrome bricks is roughly the same as that of magnesia bricks. In order to eliminate the brick during firing, due to MgO and Cr2O3, Al2O3
Q:How much is magnesium chrome brick a ton?
The price of bricks in different places is not the same. The average price is about 3500 yuan
Q:With different capacitance magnesia brick brick
Hello, the magnesium chromium brick into common magnesia chrome brick, magnesia chrome bricks, half magnesia chrome brick, magnesia chrome brick, semi fused magnesia chrome brick, unburned magnesia chrome brick, magnesia chrome brick and magnesia chrome brick and directly combined with the distinction lies in 1: containing magnesia (raw material) the purity of 2: the sintering temperature of common magnesia chrome brick sintering temperature at 1550 DEG ~1600 DEG, direct the magnesium chromium brick sintering temperature is over 1700 DEG C, because of its more than 1700 DEG C, magnesia chrome brick, microstructure change and periclase chromium ore directly combined, so called direct bonded magnesia chrome brick. The performance of direct bonding magnesia chrome brick is better than that of common magnesia chrome brick
Q:Magnesia chrome brick
The fine powder compacts after calcination produced by magnesia - chrome ore grinding method, brick with magnesia coarse particles, are effective measures to eliminate the effect of loose. Compared with the common magnesia chrome brick, the magnesia chrome brick made by this method has lower porosity, higher compressive strength, higher softening temperature and higher flexural strength. Compacts with chrome magnesite powder, magnesia chrome brick by synthetic magnesia chrome sand made of high-temperature calcination, slag resistance and high temperature strength are better than other magnesite chrome brick.
Q:What are the environmental hazards of magnesia chrome refractory bricks?
Some of the magnesia chrome bricks will be converted into Cr6+ when used, producing K2CrO4 and other toxic and carcinogenic compounds such as Cr3+
Q:How many kinds of refractory bricks are there?
Dolomite brick: coating performance, good erosion resistance, but how many bricks f-CaO, yasumizu, it is difficult to transport and storage, production with less.
Q:What is the difference between magnesia chrome brick and direct bonded magnesia chrome brick?
The magnesium chromium brick with the direct bonded magnesia chrome brick is different: 1 with the purity of magnesia (raw materials) 2: the sintering temperature of common magnesia chrome brick sintering temperature at 1550 DEG ~1600 DEG, direct the magnesium chromium brick sintering temperature is over 1700 DEG C, because of its more than 1700 DEG C, magnesia chrome brick microstructure occurred change, and periclase chromium ore directly combined, so called direct bonded magnesia chrome brick

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