Unshaped Mud

1. What is It?

Unshaped Refractory Mud is formulated by mixing inorganic cementitious materials, fine aggregates, and water in precise proportions. Its key trait is excellent workability (easy to spread/apply), and after hardening, it develops high strength and cohesion – perfect for repairing or bonding refractory parts in high-temp environments.

 

2. Classification

Based on composition, Unshaped Refractory Mud has 3 main types – each suited to different temp/industry needs:

Lime Mortar: Made from lime paste, sand, and water. For low-strength, dry masonry/plastering (e.g., non-moisture industrial walls).

Cement Mortar: Blended from cement, sand, and water. Ideal for wet environments (e.g., masonry in contact with water, wet industrial walls).

Mixed Mortar: Adds admixtures (fly ash, diatomaceous earth) to cement/lime mortar. Saves cement/lime usage while boosting workability – common types: cement-lime mortar, cement-clay mortar, lime-clay mortar.

 

3. Technical Parameters

Parameter	Fire Clay Type	High Alumina Type (70% Al₂O₃)	High Alumina Type (60% Al₂O₃)	Silica Type (92% SiO₂)
Al₂O₃ Content (≥%)	35	70	60	-
SiO₂ Content (≥%)	-	-	-	92
Bond Strength (MPa, 110℃×24h)	≥0.5	≥0.5	≥1.0	≥0.5
Max Service Temp (℃×3h)	1200	1000	1500	1400
Bond Strength (MPa, Max Temp×3h)	≥1.0	≥0.5	≥1.5	≥1.0
Thermal Conductivity (W/m·k, 350℃)	≤0.35	≤0.35	≤0.6	≤0.5
Grain Size (-1.0mm)	100%	100%	100%	100%
Grain Size (-0.076mm, ≥%)	≥50	≥50	≥50	≥50
Bonding Time (min)	1–2	1–2	1–2	1–2

 

4. Key Advantages

Easy to Apply: Excellent workability – can be troweled, poured, or packed easily (saves labor during installation).

Strong Bonding: Hardens into a cohesive, high-strength layer – ensures refractory bricks/parts stay bonded in high-temp conditions.

High Temp Resistance: Different types handle temps from 1000℃ to 1500℃ – matches various kiln/furnace operating temps.

Thermal Shock Resistance: Stays stable under rapid temp changes (common in kiln startup/shutdown).

Customizable: Adjust composition (e.g., Al₂O₃/SiO₂ content) to fit your specific equipment's temp and environment.

 

5. Applications

Industrial Kilns/Furnaces: Patching cracks in refractory linings, bonding refractory bricks in ceramic kilns, glass furnaces, and steelmaking furnaces.

High-Temp Equipment: Sealing gaps between refractory parts in heat treatment ovens, boiler furnaces, and incinerators.

Masonry Work: Building and repairing low-strength, dry/wet masonry in industrial plants (based on mortar type).

 

6. Service & Support

Custom Formulation: We'll adjust Al₂O₃/SiO₂ content, grain size, or bonding time to match your equipment's needs. Just share your kiln's temp and usage scenario.

Samples: Free 1kg sample (you cover freight) to test workability and bonding strength before bulk orders.

Technical Guidance: Our team helps with selection (e.g., choosing between fire clay/high alumina/silica types) and provides application tips.

Packing : Packed in moisture-proof bags (25kg/bag). 

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