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Fused cast alumina blocks

The fused cast alumina blocks are made by using commercial alumina powder as raw materials and fused cast into different shape, with characters of less glass phase and no pollution against glass. RA-H contains β- Al₂O₃ as principal phase, can be used in superstructure of glass tank. RA-M blocks contains α-Al₂O₃ 40～55%，β- Al₂O₃45～60%,and can be used in superstructure of glass tank and also in the lower temperature area where the blocks could contact directly with hot glass.

Data sheet of fused casting alumina bricks

		RA-M	RA-H
Al₂O₃, %		≥93.5	≥92.0
Na₂O, %		≤4.0	≤6.5
Fe₂O₃+TiO₂+SiO₂+CaO+balance, %		≤2.5	≤1.5
BD of the dense area of brick, g/cm³		≥3.30	≥3.10
CCS, MPa		-	≥30
0.2MPa RUL, ℃		-	≥1700
Glass erosion resistance at static state(normal soda-lime glass, 1350℃×48h), mm/24h		0.30	-
Thermal expansion, %		The actual measured data will be shown in the quality certificate.
unit weight kg/dm³	PT QX	≥3.00		≥2.80
	MS	≥3.10		≥2.90
	WS	≥3.20		≥3.00

Note:PT=normal casting(RN) QX=slope casting(RO) MS=reinforced casting(SR)

WS=cavity free casting(RT)