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【MAGNESIA (CHROME) BRICK】

Raw materials used in the production of magnesia-chrome refractories include sea-water magnesia and chrome ore. The principal characteristics of magnesia-chrome brick are: 1.Extremely high refractoriness. 2.High resistance to corrosion by basic slags and molten metals. Magnesia-chrome bricks offer better spalling resistance, greater volume stability and improved hot-load bearing properties than entire magmesia or chrome brick.

◎  燒成鎂(鉻)磚(Burned)
\ 代號 Brand
特性質Properties
BM95 BM9 BM8 BM7 BM6 BM5 BM4
耐火度(SK)
Refractoriness
>40 >40 >40 >40 >40 >40 >40
體密度(g/cm3)
Bulk Density
≧2.80  ≧2.80  ≧2.85  ≧2.85  ≧2.90  ≧2.95  ≧3.00
氣孔率(%)
Apparent Porosity
≦20  ≦21  ≦22  ≦23  ≦23  ≦23  ≦23
耐壓強度(kg/cm2)
Compressive Strength
≧500  ≧400  ≧300  ≧300  ≧300  ≧300  ≧300
荷重耐火度(T2)℃
Refractoriness Under Load
>1560  >1550  >1580  >1580  >1560  >1550  >1550
高溫膨脹率(%)
Expansion at 1000℃
<1.3  <1.3  <1.1  <1.0  <1.0  <0.9  <0.9
熱傳導率(kcal/m.hr.℃) 
Thermal Conductivity 
500℃
1000℃
4.8
3.6 
4.8
3.5
2.7
2.4 
2.6
2.3 
2.2
2.2 
1.9
1.9 
1.8
1.8
化學成份 (%)
Chemical Composition 
MgO
Cr2O3
≧95
--- 
≧92
--- 
≧72
≧6 
≧68
≧8 
≧60
≧10 
≧45
≧14 
≧40
≧20
◎  化學結合鎂(鉻)磚(Chemical bond)
\ 代號 Brand
特性質Properties 
UM9 UM7 UM6 UM5 UM4
耐火度(SK)
Refractoriness
>40 >40 >40 >40 >40
體密度(g/cm3)
Bulk Density
≧2.80  ≧2.90  ≧2.95  ≧3.00  ≧3.05
氣孔率(%)
Apparent Porosity
≦16  ≦16  ≦16  ≦16  ≦16
耐壓強度(kg/cm2)
Compressive Strength
≧500  ≧500  ≧500  ≧500  ≧500
荷重耐火度(T2)℃
Refractoriness Under Load
>1550  >1560  >1560  >1550  >1550
高溫膨脹率(%)
Expansion at 1000℃
<1.3  <1.1  <1.0  <0.9  <0.9
熱傳導率(kcal/m.hr.℃) 
Thermal Conductivity 
500℃
1000℃
4.8
3.6 
2.7
2.4 
2.1
2.1 
2.0
2.0 
1.8
1.8
化學成份 (%)
Chemical Composition 
MgO
Cr2O3
≧94
---
≧72
≧6
≧62
≧10
≧50
≧14
≧40
≧20

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