AZS Ramming Mass

Main composition: a mixture based on a baddeleyite-corundum aggregate.

Application

For lining bottom blocks and filling joints in the flame zone of glass melting furnaces that do not contact the glass melt; for lining and hot repair of silicate furnaces.

Description

Electrofused AZS ramming mass consists primarily of granules of electrofused baddeleyite-corundum aggregate. Its primary purpose is to create a bedding layer (also serving as a sealing layer), with a thickness of 75-120 mm, beneath electrofused AZS bottom blocks, as well as for the hot and cold repair of glass melting furnaces. Electrofused AZS ramming mass contains approximately 20% glass phase. The presence of this phase in the series of electrofused AZS ramming masses causes them to become susceptible to creep deformation above 800°C. Within the range of 800–1300°C, the material’s plasticity and adhesive properties ensure joint sealing even under minor displacements and form a reliable intermediate layer with bottom blocks made of electrofused baddeleyite-corundum brick, which also contains a similar 20% glass phase. This effectively prevents the penetration of foamed glass melt between the bottom block and the bedding layer, eliminating “upward drilling” erosion, thereby helping to extend the service life of the furnace bottom.

Specifications

Item	AZSC-5	AZSC-06	AZSC-04
Мак. размер зерна, мм	5	0.6	0.4
ZrO2 %	30~30.5	30~30.5	30~30.5
Al2O3 %	48~49	48~49	48~49
SiO2 %	18~20	18~20	18~20
Other Mixtures %	2.5	2.5	2.5
Bulk Density (g/cm³) ≥	3.1~3.2	3.1	3.1
Crystalline Composition	Corundum (α-Al₂O₃) Baddeleyite Mullite Glass Phase (18-20%)
Glass Phase Liberation Temperature °C	800~1200
Plasticity Temperature Range °C	800~1200
Mullite Crystallization Temperature from Glass Phase °C	1200
Resistance to Soda-Lime-Silicate Glass Melt	Excellent performance characteristics up to 1400°C
Product Form	Dry Mix
Application	Base layer of hearth sealing: 35-80 mm	Base layer of hearth sealing: 10 mm	Filling joints between bottom blocks

Resistance to glass melt corrosion and metal penetration

Item	Fused Cast AZS	Sintered AZS	Zircon Brick	AZS Ramming Mass	Zircon Ramming Mass
Glass Melt Corrosion Resistance Index	100	35	25	50	15
Metal Penetration Resistance Index	100	35	50	50	50

Features

🔄

Up to 800°C

Expansion occurs uniformly with a coefficient lower than that of fused cast AZS materials and is weakly dependent on load.

💎

Between 800°C and 1200°C

The liberation of the glass phase gradually increases, reaching a maximum at 1200°C, which leads to the following effects: Within this temperature range, electrofused AZS ramming masses exhibit good plasticity. Since both Bakor products (with a ZrO₂ content ≥ 32%) and electrofused AZS masses contain approximately 20% glass phase, excellent adhesion is ensured between them.

🔥

Between 1200°C and 1300°C

Above 1200°C, the glass phase begins to crystallize into mullite, plasticity decreases, and the material undergoes ceramification, causing the entire hearth to sinter into a sealed, monolithic whole.

RS Refractory