Magnesia brick utility

Magnesian content is in the 90% above, alkalescent and fireproof material that gives priority to brilliant photograph with square magnesian stone.

1, can divide commonly for agglomeration magnesia brick (say again firing magnesia brick) combine magnesia brick with chemistry (say not to burn magnesia brick again) two kinds big. Purity and firing the magnesia brick with high temperature, because grain of square magnesian stone is contacted directly, call direct union magnesia brick; The brick that makes for raw material with electric frit magnesia calls magnesia brick of electric frit recombine.
2, the alkalescent and refractory products that gives priority to brilliant photograph with square magnesian stone. The product has high temperature machine intensity is high,
3, magnesia brick has taller fireproof degree, function of very good broken bits of alkali resistance sex, loading bate begins temperature tall, but heatproof shake performance is poor. Agglomeration magnesia brick is raw material with making bricky magnesia brick, via smashing, burden, mix practice, after shaping, in 1550 ～ the high temperature of 1600 ℃ falls firing, high pure of goods firing temperature is in 1750 ℃ above. Irrigating magnesia brick is proper chemical bond is added in magnesia, via mixing refine, shape, dry and make.
4, basically use at steel-making hearth of alkalescent open-hearth furnace, electric stove and boiler setting, the permanent line of aerobic converter, nonferrous metal smelting furnace, kiln of high temperature channel, to calcine magnesia brick and liner of cement rotary kiln, the hearth of heating furnace and boiler setting, checker brick of vitreous kiln regenerator.

5, of magnesia brick fireproof degree can amount to 2000 ℃ above, the melting point that temperature of its loading bate follows cementation appearance and the amount that its issue the fluid photograph of a generation in high temperature differ and have bigger difference. The loading bate of general magnesia brick begins temperature to be between 1520~1600 ℃ , and high pure magnesia brick can amount to 1800 ℃ . The loading bate of magnesia brick begins temperature and collapse temperature differs not quite. The linear expansion rate of the magnesia brick below 20~1000 ℃ is 1.2%~1.4% commonly, show linear approximately. When fluid photograph appearing inside the brick below high temperature, can produce systole suddenly. The thermal conductance of magnesia brick is taller, carbolic brick and carbonization silica brick are next to in refractory products, what it follows temperature is elevatory and reduce. The heatproof shake sex of magnesia brick is poorer, the purity that raises magnesia brick can raise heatproof shake sex appropriately. The ability that magnesia brick fights acid slag is very poor, when using, cannot contact with silica brick directly, want to use neuter brick to separate its commonly. The conductivity that magnesia brick issues in normal temperature is very low, but in high temperature (like 1500 ℃ ) fall to cannot be ignored however, if be used at electric stove hearth, should bring to sb's attention.

One, characteristic:

Magnesian content is in the 90% above, alkalescent and fireproof material that gives priority to brilliant photograph with square magnesian stone.

Can divide commonly for agglomeration magnesia brick

(

Say again firing magnesia brick

)

Combine magnesia brick with chemistry

(

Say not to burn magnesia brick again

)

Two kinds big. Purity and firing temperature is high

Magnesia brick, because grain of square magnesian stone is contacted directly, call direct union magnesia brick; The brick that makes for raw material with electric frit magnesia calls magnesia brick of electric frit recombine.

Magnesia brick has taller fireproof degree, function of very good broken bits of alkali resistance sex, loading bate begins temperature tall, but heatproof shake performance is poor. Agglomeration magnesia brick in order to make a brick

Magnesia brick is raw material, via smashing, burden, mix practice, after shaping, in 1550 ～ the high temperature of 1600 ℃ falls firing, high pure of goods firing temperature is in 1750 ℃ above. Irrigating magnesia brick is proper chemical bond is added in magnesia, via mixing refine, shape, dry and make.

2, application:

Basically use at pottery and porcelain checker brick of regenerator of kiln of furnace of furnace of frit piece kiln, bubble flower alkaline kiln, glass. Hearth of alkalescent open-hearth furnace, electric stove mixes steel-making boiler setting,

Of aerobic converter longer line, nonferrous metal smelting furnace, kiln of high temperature channel, to calcine magnesia brick and liner of cement rotary kiln, the hearth of heating furnace and boiler setting.

3, manage changes target

Magnesia brick		MZ-91	MZ-92	MZ-93	MZ-94
Chemical Composition %    Chemical index	MgO ≥	91	92	93	94.5
	SiO2  ≤	4.0	3.5	2.5	2.0
	Fe2O3 ≤	1.3	-	-	1.2
	CaO ≤	2.5	2.5	2.0	1.8
Apparent pore leads Apparent Porosity ％ ≤		18	18	18	18
Bulk density Bulk Density G/cm3    ≥		2.86	2.90	2.95	2.92
Compressive strength Cold Crushing Strength Mpa ≥		60	60	50	60
Temperature of bate of loading of ℃ of 0.2Mpa Refractoriness Under Load T0.6		≥1570	≥1560	≥1620	≥1650
Permanent Linear Change On Reheating of the heavy change that burn a line (% ) 1500 ℃ X2h		0 ～ + 0.4	0 ～ + 0.4	0 ～ + 0.4	0 ～ + 0.4
Fight Water Cycles of ℃ of Thermal Shock Resistances 100 of thermal shock sex		≥18	≥18	≥18	≥18