Magnesia Dolomite Brick
Description
Magnesia dolomite bricks are made of high-purity and dense magnesia and sintered magnesia dolomite sand or dolomite sand as raw materials. According to different use environments, select the appropriate ratio of MgO and CaO, use anhydrous binder, and form at a suitable temperature. , High temperature firing.
Magnesia dolomite bricks have strong resistance to low iron and low alkalinity refining slag outside the furnace, and are beneficial to desulfurization and dephosphorization to remove impurities in steel, and have the effect of purifying molten steel. Used in cement kilns, magnesia dolomite bricks have a great affinity with cement clinker, are easy to hang on the kiln, and have uniform thickness.
Features
Good mechanical strength at high temperature / Good thermal shock stability
Excellent resistance to chemical impregnation / Good high temperature creep / Can purify molten steel
Application
Magnesia dolomite bricks are suitable for stainless steel refining furnaces. For example, the strip of refining equipment outside the furnace is used as an alternative product for magnesia-chrome bricks. Its application range is becoming more and more stripped as an alternative product for magnesia-chrome bricks, and its application range is also more and more extensive. Used for masonry of AOD furnace, VOD furnace and ladle.
Physical And Chemical Indicators
|
Brand / Properties |
MD15 |
MD20 |
MD25 |
MD30 |
MD40 |
|
|
Bulk Density (g/cm3) |
3.03 |
3.03 |
3.03 |
3.03 |
3 |
|
|
Apparent Porosity (%) |
13 |
12 |
12 |
13 |
13 |
|
|
Cold Crushing Strength (MPa) |
80 |
90 |
80 |
80 |
80 |
|
|
Permanent Linear Change (%)@ 1,500℃ x 2hrs |
-- |
-0.35 |
-- |
-0.61 |
-- |
|
|
Refractoriness Under Load (℃) @0.2MPa |
1700 |
1700 |
1700 |
1700 |
1700 |
|
|
Chemical Composition (%) |
MgO |
80.3 |
76.3 |
70.3 |
66.3 |
56.3 |
|
CaO |
17 |
21 |
27 |
31 |
41 |
|
|
Al2O3 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
|
|
Fe2O3 |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
|
|
SiO2 |
1.3 |
1.3 |
1.3 |
1.3 |
1.2 |
|
Productive Process
1.Raw material quality control including physical and chemical testing.
2.Crushing and grinding of bulk raw materials.
3. According to customer data sheet required to mixing Raw Material.
Pressing or shaping the green brick depend on different raw material and brick shape.
4.Dry the bricks at dryer kiln.
5.Put the bricks into the tunnel kiln to burning by higher temp from 1300-1800 deg.
6.The quality control department will inspect the finished refractory bricks random.
Packing And Shipping
Packaging according to safety sea-exporting packing Standard
Dispatch : loading the finished packing material at factory by container Door toDoor
By sea fumigated wooden pallet + plastic belt + plastic film wrap.
1.Raw material quality control including physical and chemical testing.
2.Crushing and grinding of bulk raw materials.
3. According to customer data sheet required to mixing Raw Material.
Pressing or shaping the green brick depend on different raw material and brick shape.
4.Dry the bricks at dryer kiln.
5.Put the bricks into the tunnel kiln to burning by higher temp from 1300-1800 deg.
6.The quality control department will inspect the finished refractory bricks random.
Packaging according to safety sea-exporting packing Standard
Dispatch : loading the finished packing material at factory by container Door toDoor
By sea fumigated wooden pallet + plastic belt + plastic film wrap.
