Vung Tau Materials Joint Stock Company

• Introduction

Surface coating for fiber protection plays an important role in block lining of high temperature furnaces. Suitable materials are selected by talking operating conditions into consideration. The purposes of this coating on the ceramic fiber surface are as follows:

• To reduce shrinkage of ceramic fiber during high temperature heating. Surface coating not only increases ceramic fiber surface strength but controls distortion (change of volume) caused by initial shrinkage of ceramic fiber occurring at around 800-1000°
• To increase resistance of ceramic fiber to permeation of combustion gases and gases in the furnace, and resistance to corrosion and scale attack.
• To increase resistance of ceramic fiber to gas velocity and abrasion.

 

• Quality, Quantity Required, Packaging

Properties		NEOKOTE L	NEOKOTE M	SNOKOTE S	NEOKOTE K	NEOKOTE MI	NEOKOTE SP	NEOKOTE SPG
Max. Service Temperature (°C)		1000	1400	1450	1450	1400	1500	1500
Type		Dry	Dry	Dry	Dry	Wet	Wet	Wet
Installation Method		Spraying and Trowelling					trowelling	Gunning
Bulk Density at powder (kg/m3)		750	1100	1040	870	-	-	-
Water used in mixing for spray (%)		60~65	40~45	40~45	45~50	-	-	-
Linear Shrinkage (%)	after firing at 800°C	0.7	-	-	-	-	-	-
	after firing at 1000°C	1.2	-	-	-	-	-	-
	after firing at 1300°C	-	1.0	0.5	-	0.2	-	-
	after firing at 1400°C	-	1.0	-	-	0.4	-	-
	after firing at 1450°C	-	-	0.8	0.7	-	-	-
	after firing at 1500°C	-	-	-	-	-	-1.0	-1.0
Chemical Composition (%)	Al2O3	40	66	79	80	79	70	70
	SiO2	52	22	20	3	20	29	29
	Others	R2O 1.2	SiC 8.0	-	MgO 15	-	-	-
Quantity Required (kg/m2) v Installation thickness: 1~2mm		2~3	3~4	3~4	3~4	5~6	-	-
Quantity per Bag or Can (kg)		20	20	20	20	20	20	1
Packaging		Paper Bag				Can		Film-pack