Fused Cast AZS 41 Blocks

Fused cast AZS 41# blocks made from a combination of alumina (Al2O3), zirconia (ZrO2), and silica (SiO2) are the highest quality grade of fused cast refractory blocks used in the glass furnace. Fused Cast AZS 41# blocks denotes the percentage of ZrO2≥40.5%. Different Companies may have different indication codes for this quality grade. For example, SEPRO uses ER 1711 for AZS 41#, and REFEL uses 1240 for AZS 41#. With the highest zirconium oxide content, Fused Cast AZS 41# Refractory block is designed to provide best resistance to glass corrosion. Its chemical and physical properties make it be used in the most aggressive area of the glass furnace.

Classification and Properties

Fused cast AZS 41# Refractory blocks are normally classified into two quality grades:

AZS 41#ZWS (End Cut Casting) and AZS 41#WS (Void Free)

Fused cast AZS 41# blocks have better resistance to high temperatures and corrosive environments in the glass furnace operation

Fused Cast AZS 41# Refractory Block Chemical and Physical Datasheet

Fused Cast AZS 41# Refractory Blocks Chemical and Physical Datasheet

Item		AZS41
Chemical Composition%	Al2O3	≥45.00
	ZrO2	≥40.50
	SiO2	≤12.50
	Na2O+K2O	≤1.30
Volume density g/cm3		≥4.00
Apparent Porosity %		≤1.2
Cold Crushing Strength  Mpa		≥200
Exudation Temperature of Glass Phase		≥1410
Bubble Separation Ratio（1300℃×10h）		≤1.0
Anti-corrosion rate of glass liquid 1500℃×36h （mm/24h）%		≤1.2
Bulk density （g/cm3）	PT(RN RC N)	≥3.80
	ZWS(RR EVF EC ENC)	≥3.95
	QX(RO)	≥3.90
	WS( RT VF EPIC FVP DCL)	≥3.98

Applications

Because of fused cast AZS 41# blocks’ better performance to withstand the most corrosive environments  in glass furnace, they are normally used in those most crucial areas of glass furnace, like melting tank sidewall, Melting Tank Corner Blocks, Throat Blocks, Barrier Wall Blocks, Electrode Blocks and etc. 

Throat

Fused cast AZS 41 block contains more uniformly distributed zirconium oxide crystals, which combine with co-crystals of silicon oxide and alumina to form a dense microstructure, resulting in effective resistance to the erosion of glass liquids with minimal contamination of the glass liquids. Fused cast AZS 41 blocks have high-temperature stability and are resistant to scouring.

Barrier block

Weir is the key area where the glass liquid flows and changes in the furnace, fused cast AZS 41 blocks have high resistance to erosion of glass liquid, low pollution characteristics, good thermal stability and mechanical strength as well as the ability to adapt to the specific working environment of the weir, which makes them an ideal choice for the key part of the glass furnace.

Doghouse

Fused cast AZS 41 block has very high resistance to erosion by liquid glass and low contamination properties, which can effectively protect this vulnerable area and extend the service life of the furnace. Specifically, fused cast AZS 41 blocks contain more uniformly distributed zirconia crystals, which provide excellent erosion resistance and shallow contamination of the glass liquid, making them particularly suitable for use in glass furnaces in critical areas such as the doghouse corner, which are characterized by high temperatures .

Henan SNR Refractory Co., Ltd（SNR） has been committed to the development of high-quality fused cast AZS blocks.If you have any needs, please contact us.