Zircnia Refractory Brick Description
Zirconia refractory brick is produced by stable zircon sand. Zircon bricks have a very high melting point of 2700℃, is an excellent refractory material with good corrosion resistance. Zircon bricks are mainly used in glass industry, non-ferrous metal smelting furnace, and pure steel furnace as lining for working ends and feeder channels in melting tanks. Zircon bricks can also serves as separation layer between silica and fusion cast materials in order to prevent contact reactions. Zirconia related bricks including zirconia corundum brick, zirconia mullite brick, zirconia hollow ball brick, zirconia chromium corundum brick, AZS bricks and have correspondingly exclusive characteristics. For example, Zircon corundum brick has higher corrosion resistance and thermal shock resistance than zirconia brick.
Zircnia Refractory Brick Characteristics
Excellent mechanical strength high density.
Thermal shock stability.
Good resistance to corrosion,
high refractoriness under load
Zircon Fire Brick Parameters
| Items | RS-Z30 | RS-Z50 | RS-Z60 | RS-Z65 | RS-Z69 |
| ZrO2% | 30 | 50 | 60 | 65 | 69 |
| Al2O3% | 42 | 10 | 4 | / | / |
| SiO2 % | 20 | 34 | 30 | 32 | 28 |
| Apparent Porosity (%) ≤ | 21 | 20 | 21 | 18 | 19 |
| Bulk Density ≥ | 3.1 | 3.3 | 3.5 | 3.75 | 1.45 |
| Cold Crushing Strength (MPa) ≥ | 200 | 200 | 200 | 200 | 200 |
| 0.2 MPa Refractoriness Under Load ≥ °C | 1500 | 1550 | 1600 | 1680 | 1680 |
Zircnia Refractory Brick Applications
Ladle lining for metallurgical industry.
Glass contact portion of alkali free or low-alkali glass melting furnace.
Soda-lime glass kiln as neutral brick, skew brick.
Paving and sub paving, channel blocks, sidewall of meter of glass fiber furnace and floating glass tanks.
Upper area of flame space or frequent thermal shock region, lining of alkali-free or low-alkali glass, sodium-calcium glass, boron-silicate glass, ceramic glass, lead glass, and other technical glass melting furnace.
Special region of glass tank, such as paving part and secondary layer of paving bottom, back lining, wall and bottom of fore hearth, flowing spout and spinning portion, melter, etc.
Transition region between up roof silica brick and fusion zirconia-corundum brick or fusion zirconia-mullite brick.
Transition region between silica brick and magnesia brick, areas of crown, burner, thermal couple, peep hole, and secondary layer of melter bottom and its back lining, etc.
