Specifications

high alumina brick
1.High refractoriness
2.High cold crushing strength
3.Strong abrasion and corrosion resistance

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High alumina  brick
1.Definition:

It is the aluminium silicate natural high grade refractory product.

2.Highlight:

1). High refractoriness.

2).Excellent resistant the corrosion of the various kinds of the slag.

3). High start refractoriness under load.

3. Application:

Mainly used in constructing blast furnace, hot-blast furnace, roof of electric furnace, reflecting furnace, linings of rotary kilns, etc.It is also widely used in storing thermal checker brick of open-hearth furnace, chock plug nozzle brick in the pouring systerm.

4.Properties:

Item		Indexes
		LZ-75	LZ-65	LZ-55	LZ-48
Al2O3 %		≥75	≥65	≥55	≥48
Refractoriness(°C)		≥1790	≥1790	≥1770	≥1750
Refractoriness under Load		≥1520	≥1500	≥1470	≥1420
Permanent Linear Change	1500°C,2h	+0.1                           -0.4			-
	1450°C,2h	-			+0.1                             -0.4
Apparent Porosity %		≤22	≤23	≤22	≤22
Cold Crushing Strength		≥58	≥50	≥46	≥42