KN/KD/KS Silica Brick

Main Composition: SiO2≥94.5%

Application: Industrial Furnaces and Equipment

Raw Material: Silica Sand

Color: Yellow

Refractoriness: ≥1770℃

Refractoriness Under Load: ≥1640℃

Capacity: 1000 MT per month

Package: Export wooden pallets and polyboard

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Introduction:
Silica brick is an acid refractory material composed of tridymite, cristobalite and a small amount of residual quartz and glass phase. Silica bricks have good resistance to acid slag erosion. The refractoriness under load is as high as 1640～1670℃, and the volume is relatively stable under high temperature for long-term use.

Features:
1.Good resistance to acid slag erosion.
2.High strength at high temperature.
3.Little dimensional change when using at high temperature for a long time.

Application:
It is mainly used for the chamber and combustor of coke oven, regenerator chamber and cinder chamber of steelmaking open hearth furnace, soaking pit, refractory material of glass melting furnace, vault and other load-bearing parts of ceramic kiln .It is also used for high temperature load bearing parts of hot blast furnace and roof of acid open hearth furnace.

Technical Data:

Item			KN	KD	KS	Testing in Accordance With
			Regenerator	Boiler Wall	Carbonization Chamber Bottom
			Boiler Wall
			Oven Roof
Chemical Composition	SiO2	% μG	≥94.5	≥95.0		DIN51070
		σ	1.0	1.0		Part 26
	Al2O3	% μG	≤2.0	≤1.5		DIN51070
		σ	0.3	0.3		Part 36
	Fe2O3	% μG	≤1.0	≤1.0		DIN51070
		σ	0.2	0.2		Part 56
	CaO	% μG	≤3.0	≤3.0		DIN51070
		σ	0.35	0.35		Part 76
	Na2O+K2O	% μG	≤0.35	≤0.35		DIN51070
		σ	0.02	0.02		Part 86
Residual Quartz Content1)	Raw materials type A(coarse crystalline)	% μG	As per mutual agreement			（2）
		σ	6.0
		xmax
	Raw materials type B(crypto crystalline)	%	1.5			-
			0.5			-
Cold Compressive Strength		N/mm2μG	≥282）	≥35	≥45	DIN51067 Part 1
		σ	10	10	10
		xmin	20	25	30
Apparent Porosity		% μG	≤24.5	≤22.0	≤22.0	DIN51056
		σ	1.3	1.3	1.3
Refractoriness Under Load Initial Temperature ta		℃ μG	≥1640	≥1650		DIN51064
		σ	25	25
Refractoriness Under Load T0.5℃ (differential method)		℃ μG	According to agreements			DIN51053
		σ				Part 1
Compressive Creep 3）		% μG	≤0.12		-	DIN51053Part 2
		σ	0.05
		% μG	≤0.35
		σ	0.1		-
Refractoriness 4)		SK μG	≥170(SK31)5)	-	-	DIN51063Part 1
		σ	2(SK1)5)
Average Thickness Loss		mm μG	-	-	≤4.5	DIN52108

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