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


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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 performance of direct bonding magnesia chrome brick is better than that of common magnesia chrome brick.
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: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:Magnesium chrome brick price?
Dashiqiao magnesium brick factory of China Building Materials Academy is a joint stock company invested, constructed and managed by China Building Materials Academy.The plant was built in 1992, officially put into operation in 1993, covers an area of 89 thousand square meters, has a long 118 meters, an annual output of 30 thousand tons of high temperature tunnel kiln production line. The group has 1200 employees, 6 senior engineers, more than 20 engineers and technicians, and has strong technical force. Group's total assets of 5.5 million, with an annual output value of 600 million. Profit and tax 65 million yuan.
Q:How much is magnesium chrome brick a ton?
Magnesium chrome bricks according to physical and chemical indicators in order to know the specific price, the production of magnesia chrome brick place a lot
Q:What are the environmental hazards of magnesia chrome refractory bricks?
Nowadays, the use of magnesia chrome bricks, especially in cement kilns in the construction industry, has been required to be free of chromium, and the cement products shall not be tested with chromium.
Q:Process for producing 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.In addition, magnesite brick and electric arc furnace melting magnesium chromium material by direct casting (see Figure microstructure, color), fused magnesia chrome brick material produced by the process of melting particles combined with magnesia chrome brick etc..
Q:What is a half combination of magnesia chrome bricks?
Opacifying particles as periclase spinel crystal structure, fully developed, as part of account of solution structure and matrix.
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.

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