Intermittent kiln for ceramics firing, frequent heating/cooling cycles; thermal shock and deformation of wall/roof refractories are prominent
Problem-by-problem analysis with solutions and recommended refractories
High-alumina brick LZ-55 (Al₂O₃≥55%) with refractoriness ≥1770℃ offers dense structure, wear resistance against gas scouring and combined cold/hot strength—one of the most widely used shaped refractories.
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High-alumina brick LZ-65 (Al₂O₃≥65%, refractoriness ≥1790℃) has a higher corundum/mullite phase ratio for stronger slag resistance, higher temperature rating and better hot load-bearing capacity.
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Low-creep high-alumina brick with Al₂O₃≥75% and creep rate ≤0.8% (1550℃×50h), RUL ≥1550℃. Minimal deformation under long-term hot load, engineered for load-bearing hot stove domes and walls.
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Phosphate-bonded high-alumina brick (Al₂O₃≥75%, refractoriness ≥1770℃) avoids high-temperature firing for energy saving, hardening further in service as temperature rises. Cost-effective with good thermal-shock resistance.
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Spalling-resistant high-alumina brick introduces ZrO₂ (3-6%) for transformation and microcrack toughening. Al₂O₃≥70%, thermal-shock stability ≥15 cycles, greatly improved resistance to structural spalling under frequent temperature cycling.
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Micro-expansion high-alumina brick (Al₂O₃≥75%, PLC 0.2-0.6% at 1500℃) expands slightly at temperature to compensate joint shrinkage, improving lining integrity and preventing gas/slag leakage.
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Mullite brick with mullite as the main phase (Al₂O₃≥75%, refractoriness ≥1850℃, RUL ≥1650℃) offers high-temperature volume stability with excellent thermal-shock and creep resistance.
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Lightweight high-alumina insulating brick (Al₂O₃≥48%, 1500℃ max, bulk density 0.8-1.2 g/cm³, conductivity ≤0.5 W/(m·K)) saves energy with light weight and low thermal conductivity.
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Lightweight fireclay insulating brick (Al₂O₃≥35%, 1250℃ max, bulk density 0.6-1.0 g/cm³, conductivity ≤0.35 W/(m·K)) is an economical, stable insulator.
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Lightweight silica brick (SiO₂≥92%, 1550℃ max, bulk density 1.2-1.5 g/cm³, RUL ≥1550℃) combines silica refractoriness with lightweight insulation and matches silica brick thermal expansion.
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Light mullite insulating brick takes mullite as its main phase with Al₂O₃ of 50%–85%, featuring low thermal conductivity, low bulk density and good high-temperature structural strength for insulating and composite linings of ceramic kilns, glass furnaces and reheating furnaces.
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Cordierite-mullite kiln furniture (saggers, shelves, posts and beams) combines low thermal expansion with high refractoriness under load, offering excellent thermal shock resistance and long service life for ceramic, electronic ceramic and magnetic material kilns.
Learn More →Roller kilns fire fast, stressing walls with frequent thermal shock; spall-resistant bricks and suspended roof slabs are preferred.
View Problems & Solutions →Tunnel kiln car linings face repeated heating and load abrasion; burning-zone brickwork and car tops are the critical zones.
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