Fused Cast 33 ＃ AZS Block (RTK-AZS33)

RTK-AZS33, a high-performance refractory material, is particularly superior in preventing molten glass from being contaminated. It has little tendency to cause stones, bubbles and matrix glass phase precipitation in the glass. And it has strong resistance to acid and alkaline slag as well as molten glass, making it suitable for use in harsh chemical environments. It is applicable to the upper structure of the melting end , the side wall of the working pool, the paving blocks and forehearth, etc.

product details

Berif Introduction

RTK fused cast AZS blocks are made of high-quality purified raw materials, using a special electric arc furnace, and a fused cast process that has undergone long arc melting and oxidation treatment. This process has almost no carbon contamination from the electrode. Due to the oxidation fused cast process and the use of high-purity raw materials, RTK fused cast AZS series have special and high resistance to the corrosion of molten glass, and have little contamination to the molten glass.

Fused cast AZS products can be divided into 41# AZS block (RTK-AZS41), 36 # AZS block (RTK-AZS36) and 33 # AZS block (RTK-AZS33) according to the different ZrO₂, content in the chemical composition.

RTK-AZS33, a high-performance refractory material, is particularly superior in preventing molten glass from being contaminated. It has little tendency to cause stones, bubbles and matrix glass phase precipitation in the glass. It is applicable to the upper structure of the melting end , the side wall of the working pool, the paving blocks and forehearth, etc.

Standardly poured AZS33 block is suitable for working tank, forehearth, superstructure and crown, while AZS33 poured without shrinkage cavities is suitable for tank sidewall, tank bottom, forehearth, C-shaped block, doghouse arch, superstructure and etc.

Chemical composition

CHEMICAL COMPOSITION	TYPICAL VALUE
SIO₂%	15
AI₂O₃%	The Remainder
ZrO₂	33.5
Fe₂O₃＋TiO₂＋CaO＋MgO＋Na₂O＋K₂O%	≤2.0

Physical property

PHYSICAL PROPERTY	TYPICAL VALUE
Bulk density (dense part) g/cm³	3.80
Apparent porosity (dense part) %	0.7
Initial precipitation temperature of vitreous phase°C	1400
Vitreous phase exudation (1500°CX4hr)%	2.0
Anti-molten glass erosion speed under static condition mm/24hr	1.4
Bubble release rate%(1300°CX10hr,ordinary soda lime glass)	1.2
CALCULATE SPECIFIC GRAVITY	TYPICAL VALUE
Ordinary casting /inclined casting g/cm³	3.5
Quasi-non shrinkage casting g/cm³	3.70
Non shrinkage casting g/cm³	3.80