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AZS Ramming Mass: High Corrosion Resistant Monolithic Refractory for Glass Furnace
1. Product Overview
AZS Ramming Mass, fully named Alumina-Zirconia-Silica ramming mass, is a high-performance monolithic refractory specially engineered for glass melting furnaces. It takes crushed electrofused AZS block as the main aggregate, matched with compound binders and functional additives via scientific particle grading mixing.
As an unshaped refractory material, it inherits the core advantages of fused cast AZS bricks: superior anti-glass-liquid corrosion, low apparent porosity and stable high-temperature performance. After on-site ramming and high-temperature sintering, it forms an integrated dense lining structure, widely applied in bottom sealing, brick joint filling and hot repair of all types of glass kilns.
2. Core Chemical & Physical Composition
Standard industrial grade AZS ramming mass maintains fixed chemical ranges to guarantee stable corrosion resistance:
- Al₂O₃ ≥ 48%
- ZrO₂ ≥ 30%
- SiO₂ ≤ 20%
- Impurity (Fe₂O₃ + TiO₂) ≤ 2%
We provide multiple particle size models for different construction scenarios:
- Coarse grade (0–5mm): For kiln bottom overall ramming base layer
- Medium grade (0–0.6mm): For filling gaps between AZS paving blocks
- Fine grade (0–0.4mm): For narrow brick joints and local hot patching
Key physical indicators after curing:
- Bulk density after drying: 2.8–3.2 g/cm³
- Maximum long-term service temperature: 1650℃
- Optimal anti-corrosion working temperature range: 1200–1300℃
- Recommended water addition ratio: 8–12% by weight
3. Unique Product Advantages
3.1 Outstanding Resistance to Molten Glass Erosion
When contacting alkaline molten glass, the material generates a dense protective alumina interface layer to block glass liquid penetration, drastically reducing ZrO₂ dissolution loss. Compared with zircon-only ramming mass, it avoids rapid erosion and peeling during long-term kiln operation.
3.2 Low Thermal Expansion & Stable Thermal Shock Resistance
Its thermal expansion coefficient is lower than fused cast AZS bricks below 800℃, with uniform volume change during heating and cooling cycles. It effectively prevents lining cracking, deformation and leakage caused by temperature fluctuation, extending the overall service life of the furnace bottom.
3.3 Excellent Construction Performance
Good room-temperature plasticity enables easy manual or mechanical ramming. It can harden naturally without complex heating curing procedures; residual mixed wet material is reusable to cut raw material waste. The phosphate-free binder formula meets environmental standards with no pollution to glass melt.
3.4 High Compactness & Low Permeability
High bulk density and low porosity after compaction stop molten glass and metal liquid from seeping into the furnace foundation, solving the hidden danger of kiln bottom bubbling, blistering and structural damage.
4. Main Industrial Application Scenarios
AZS ramming mass is exclusively developed for the glass manufacturing industry, covering all core high-temperature zones of glass melting furnaces:
- Furnace bottom sealing layer: Laying under AZS paving blocks to form an anti-seepage base
- Brick joint filling: Filling gaps between adjacent fused cast AZS blocks to eliminate liquid penetration channels
- Local hot repair: Quick patching for damaged pool walls, flow channels and doghouse areas during short kiln maintenance
- Glass fiber & rock wool kilns: Lining repair for low-alkali glass melting sections
- Container glass, float glass and art glass melting tanks: Universal bottom refractory auxiliary material
5. Standard Construction Guide
- Surface cleaning: Remove dust, residual old refractory and glass residues from the construction base surface
- Mixing: Add clean water proportionally and stir evenly to a loose damp state; avoid overwatering to reduce post-sinter shrinkage
- Ramming operation: Layered compaction with ramming tools, each layer thickness controlled within 50mm to ensure full density
- Natural curing: Air dry for 24–48 hours at room temperature before kiln heating
- Heating schedule: Slow temperature rise below 1200℃ to complete ceramic sintering and form an integrated dense lining
6. Packaging & Storage
- Standard packing: 25kg woven bag with inner plastic moisture-proof liner
- Shelf life: 12 months under dry, ventilated warehouse storage
- Storage note: Seal bags tightly after opening; prevent rain and moisture absorption which will damage construction plasticity
7. Why Choose Our AZS Ramming Mass
- Raw material control: Adopt high-quality electrofused AZS waste blocks with strictly controlled low iron-titanium impurities to avoid glass product discoloration
- Customizable grading: Adjust particle size distribution and binder formula according to customer kiln structure and construction process
- Stable batch consistency: Automatic batching production line ensures identical chemical and physical indexes per shipment
- Full technical support: Provide on-site construction guidance, heating curve suggestions and matching refractory mortar solution
- Cost optimization: Extend kiln overhaul cycle, reduce frequent shutdown maintenance and lower long-term production costs
8. Summary
As the matched monolithic refractory for fused cast AZS brick lining, AZS ramming mass solves the two core pain points of glass furnaces: glass liquid penetration and short lining service life. With reliable anti-corrosion performance, simple construction and wide adaptability across all glass production lines, it has become an essential auxiliary refractory material for modern glass melting kiln design and maintenance.
Contact our technical team to get customized index schemes and free technical data sheets for your furnace project.
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