Direct Bonded Magnesia-Chrome brick System 1

Direct Bonded Magnesia-Chrome brick

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Features：

Because of the advantage of easily adheringkiln crust and strong erosion resistance, the direct bonded magnesia chromebrick has acting the unchangeable part in burning zone of cement rotary kiln. However,the problem that magnesia chrome brick for cement kiln causes pollution becomesincreasing prominent, and the call for chrome free brick for cement kiln is increasing.

Before thecement industry eliminates magnesia chrome brick, direct bonded low chrome magnesiachrome brick should be chosen and used reasonably to decrease the pollution ofsexavalent chrome as far as possible and ensure the normal operation of cementkiln. Direct bonded low chrome magnesia chrome brick is featured with lowchrome content, high refractoriness under load, high crushing strength, andgood corrosion resistance.

Applications

Thebrick is an ideal transition product for all kinds of direct bonded magnesia chromebrick for cement rotary kiln burning zone before chrome free brick is used incement kiln.

item	index
MgO,% ≥	88
Cr₂0₃	3-5
SiO₂,% ≤	1
Apparent porosity, % ≤	17
Refractoriness under load℃[0.2MPa×0.6%] ≥	1700
Cold crushing strength MPa ≥	60
Thermal shock resistance，time [1100℃， water-cooling] ≥	7

Direct Bonded Magnesia-Chrome brick

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..: Direct bonded magnesia chrome brickThe loose effect caused by the expansion of spinel when the oxide of magnesia brick is directly reacted with the oxide of iron can also be used to make magnesia chromite brick with synthetic common sintered material. In addition, there are non burned magnesia chrome bricks, for example, non burned magnesia chrome bricks combined with inorganic magnesium salt solutions. The unfired magnesia chrome brick has the advantages of simple production process, low cost and good thermal stability, but the strength of the high temperature is far less than that of the burnt brick. In the late 50s, a so-called "direct bonding" magnesia chrome brick was developed. The characteristics of this brick raw material is pure, high firing temperature, periclase and spinel phase with high temperature directly, silicate and other low melting point phase for island distribution, therefore, significantly improve the high temperature strength and slag resistance of brick.

Q:What is a half combination of magnesia chrome bricks?: Direct binding for magnesium magnesium rock stone or periclase spinel crystals, silicate phases were isolated in the grain asked. Half combined with thermal shock resistance than magnesia chrome brick direct bonded magnesia chrome brick, and about half combined with the characteristics of magnesia chrome brick, some physical and chemical indicators. I don't understand, I know there is a production of magnesia chrome brick factory technicians understand this, is known as gold refractory material factory.

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: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: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: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: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

Q:Magnesia chrome brick: Magnesia chrome brick to Magnesium Oxide (MgO) and chromium oxide (Cr2O3) as the main ingredient, refractory periclase and spinel as main mineral components of products. The bricks have high refractoriness, high temperature strength, strong resistance to alkaline slag, good thermal stability, and certain adaptability to acid slag. The main raw materials for making magnesia chrome bricks are sintered magnesia and chromite. The purity of magnesia raw materials should be as high as possible, chrome iron ore chemical composition requirements: Cr2O3:30 - 45%, CaO = 1 ~ 1.5%.

Q:What are the types of magnesia chrome bricks for industrial use?: It is possible to judge by the concrete kiln. The magnesium chrome bricks produced by real gold company are very good. Our factory purchased them the year before last, and their technicians were very professional, and gave us very good suggestions.

Q:How many kinds of refractory bricks are there?: High aluminum brick: Al2O3 content more than 75 higher than that of the refractory clay brick, anti corrosion resistance, suitable for cement kiln etc., long service life, but high price.

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