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Phosphate-bonded high alumina bricks

Al₂O₃ (%)≥75～77; Fe₂O₃ (%)≤3.2
Cold crushing strength (MPa):60～75
Refractoriness under load(2kg/cm²) (℃):1250～1350

Application:

Phosphate-bonded high alumina bricks are mainly used in where the parts of cement kilns are easy to wear and corrode.

　　Phosphate-bonded high alumina bricks(Phosphate bricks for short) use special and first grade high-alumina bauxite chamotte as raw materials, phosphoric acid solution as binder, being high pressure pressed and heat-treated at 400～600℃.

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Index		Specification
		P			PA
		Good 1	standard		Good A1	Good A2
Chemical Composition	Al₂O₃ (%)≥	75			77
	Fe₂O₃ (%)≤	3.2			3.2
	CaO (%)≤	0.6			0.6
Cold crushing strength (MPa)		70		60	75	65
Bulk density (kg/cm³)		2700		2650	2750	2700
Refractoriness under load (2 Kg/cm²) (℃)		1350		1300	1300	1250
Refractoriness (℃)		1780

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