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High Alumina Arc Brick: Premium Refractory Curved Brick for Industrial Kiln Lining
1. Core Material & Production Technology
High alumina arc bricks take high-grade bauxite clinker as the main raw material, with scientifically proportioned auxiliary raw materials. The alumina content of mainstream products ranges from 48% to 90%, covering multiple grades to meet different temperature and corrosion resistance requirements. The whole production process adopts standardized industrial procedures: raw material crushing and fine grinding, accurate batching, high-pressure mechanical molding, low-temperature drying and high-temperature tunnel kiln calcination. Strict firing process ensures the brick body has a dense internal structure, low porosity and uniform texture, effectively avoiding loose pores and structural defects that affect high-temperature performance.
Through optimized mullite phase formation technology, the product forms a stable high-strength crystal structure inside after high-temperature calcination, which greatly improves the high-temperature mechanical stability and chemical corrosion resistance of the brick body, and lays a solid foundation for long-term stable operation in harsh industrial environments.
2. Key Performance Advantages
High alumina arc bricks integrate excellent high-temperature resistance, structural stability and chemical stability, with comprehensive performance far exceeding ordinary clay arc bricks, and have outstanding application advantages in industrial high-temperature scenarios:
2.1 Ultra-high Refractoriness & Thermal Stability
The refractoriness of high alumina arc bricks is higher than 1770℃, and the high-grade products can reach 1790℃ and above. The load softening temperature is stable at about 1500℃-1550℃. It can maintain stable structural strength without deformation, softening or collapse under long-term high-temperature and certain load conditions, and adapt to continuous high-temperature operation of industrial furnaces.
2.2 Excellent Thermal Shock Resistance
The product has a reasonable thermal expansion coefficient and strong thermal shock resistance. It can resist frequent temperature rise and fall and sudden cooling and heating changes in the furnace, effectively avoid brick body cracking, peeling and damage caused by thermal stress, and greatly improve the structural integrity of furnace lining.
2.3 Strong Slag & Corrosion Resistance
As a neutral refractory material, high alumina arc bricks have good erosion resistance to most acidic and alkaline slags, molten metals and high-temperature flue gas. It can effectively resist chemical corrosion and scouring in the smelting, calcination and incineration processes, reduce lining loss, and maintain stable physical and chemical properties for a long time.
2.4 Dense Structure & Long Service Life
High-pressure molding and high-temperature calcination make the brick body low in porosity and high in bulk density, with strong compression resistance and wear resistance. The precise arc size ensures seamless fitting during construction, reduces heat loss caused by gaps, improves the overall thermal insulation effect of the furnace body, and extends the service life of industrial furnace lining by 30%-50% compared with ordinary refractory bricks.
2.5 Energy Saving & Construction Convenience
The integrated arc design simplifies the furnace lining construction process, reduces splicing gaps and construction difficulty, and improves masonry efficiency. At the same time, the excellent thermal insulation performance reduces furnace heat dissipation loss, lowers industrial energy consumption, and helps enterprises reduce production costs.
3. Main Technical Specifications
High alumina arc bricks are available in multiple grades to adapt to different working conditions. The conventional core technical parameters are as follows:
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Alumina Content: 48%~90% (customizable grades)
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Refractoriness: ≥1770℃ (high grade ≥1790℃)
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Load Softening Temperature: 1500℃~1550℃
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Bulk Density: ≥2.55g/cm³
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Apparent Porosity: ≤22%
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Cold Crushing Strength: ≥40MPa
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Thermal Shock Stability: Excellent, resistant to repeated cooling and heating cycles
In addition, we support customized size, radian and performance parameters according to customer furnace equipment specifications to meet personalized engineering needs.
4. Wide Application Scenarios
With excellent comprehensive performance, high alumina arc bricks are widely used in various industrial high-temperature furnaces with curved and arched lining structures, covering metallurgy, building materials, chemical industry, environmental protection and other fields:
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Metallurgical Industry: Blast furnace arches, electric arc furnace linings, ladle curved parts, sintering furnace circular linings
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Building Material Industry: Rotary kiln lining, tunnel kiln arch roofs, ceramic kiln curved walls, cement kiln transition sections
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Chemical & Environmental Protection Industry: Industrial incinerator arch structures, chemical high-temperature reaction furnace curved linings, waste heat recovery furnace lining
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Other High-temperature Equipment: Boiler arched roofs, thermal insulation furnace circular structures, various special-shaped high-temperature kiln linings
5. Product Selection & Advantages
Compared with ordinary clay arc bricks and low-alumina curved bricks, high alumina arc bricks have higher temperature resistance, stronger corrosion resistance and more stable structural performance, which are suitable for medium and high-temperature harsh working conditions. For low-temperature and light-load furnace structures, conventional grade products can be selected to control costs; for high-temperature, high-corrosion and long-term continuous production equipment, high-aluminum high-grade arc bricks are recommended to ensure long-term stable operation of the furnace body.
Our high alumina arc bricks adopt strict raw material screening and full-process quality inspection, with stable product quality and consistent size accuracy. The products have the characteristics of low failure rate, long service cycle and low maintenance cost, which can effectively reduce furnace shutdown maintenance times and improve industrial production efficiency for enterprises.
6. Summary
High Alumina Arc Brick is a high-efficiency and durable special refractory product integrating structural fitting, high-temperature resistance and corrosion resistance. Its unique arc-shaped structural design solves the masonry pain point of curved furnace lining, and excellent material performance meets the stringent high-temperature operation requirements of modern industrial furnaces. Whether it is metallurgical smelting, building material calcination or chemical environmental protection high-temperature equipment, it can provide reliable long-term protection for furnace lining structures, help enterprises achieve safe production, energy saving and consumption reduction, and create higher economic benefits.
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