Chrome-zirconium Corundum Castable

Chrome-zirconium corundum castable is a high-end refractory castable designed for extreme high-temperature and highly corrosive conditions. It combines excellent corrosion resistance, superior structural stability, and ultra-long service life, and is widely used in the core components of key high-temperature equipment in glass, metallurgy, and other industries.

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Description

Chrome-zirconium corundum castable is a high-grade monolithic refractory material based on a high-purity corundum matrix, incorporating high-performance components such as zirconium oxide (ZrO₂) and chromium oxide (Cr₂O₃), combined with a high-performance bonding system. At high temperatures, it forms a stable and dense structure, providing exceptional resistance to erosion by

molten glass, slag, and various chemical media.

Chromium corundum castable is a neutral refractory material based on Al₂O₃ and Cr₂O₃ as its primary components. It is formulated from coarse and fine aggregates, powders, together with binders and additives. Designed for casting and monolithic applications, the material is mixed with a binder, setting accelerator, and a controlled amount of water during installation to achieve good fluidity.

Chromium corundum castable is a refractory material characterized by exceptional resistance to slag attack and erosion. Produced using ultrafine powder and low-cement technology, it is widely applied in steelmaking processes. Its primary performance advantage lies in its outstanding slag resistance.

As a specialized manufacturer of chromium corundum castables, we continuously conduct research and optimization of product formulations. By incorporating additives such as water-reducing agents and retarders, we tailor the material to suit varying operating conditions, service durations, and different installation environments and climates.

Table 1

Physicochemical Properties		Calcium Aluminate Cement Bond	Phosphate-bound
Chemical Composition %	Al₂0₃	≥80	≥85
Chemical Composition %	Cr₂O₃	8～10	5～8
Bulk Density g·cm^３	110℃×24h	≥2.8	≥2.8
Bulk Density g·cm^３	1500℃×3h	≥3.0	≥3.0
Heating Wire Changes %	110℃×24h	≤-0.05	≤Z±0.05
Heating Wire Changes %	1500℃×3h	≤±0.3	≤±0.3
Flexural Strength MPa	110℃×24h	≥10	≥6
Flexural Strength MPa	1500℃×3h	≥25	≥30
Compressive Strength MPa	110℃×24h	≥50	≥40
Compressive Strength MPa	1500℃×3h	≥80	≥80
Operating Temperature		1500～1650℃	1500～1650℃

Table 2.

Indicators Project Category		AZS50V	AZS06L	AZS04J
Al₂O₃ % Not less than		45	45	45
ZrO₂ % Not less than		29	30	30
SiO₂ % Not less than		20	18	18
Bulk Density g/cm³Not less than		3.0	2.65	2.8
Flexural Strength MPa Not less than	110℃×24h drying 1100℃×2h After burning	11.5 ＞18		12.1 ＞18
Compressive Strength MPa Not less than	110℃×24h drying 1100℃×2h After burning	85 100		85 100
Resistance to Molten Glass Corrosion		good	good	good
Bubble Precipitation Tendency		weak	weak	weak
Construction Water Consumption		4～5	8～10	4～5
Part of Use		The sealing layer at the bottom of the melting furnace pool is above the insulation layer.	50V or above, below the paving bricks	For grouting of paving bricks

Chromium corundum refractory castable features excellent erosion and corrosion resistance, a high refractoriness under load (up to 1700°C), good installation performance, high lining density, and cost-effectiveness. It is widely used in kilns and thermal equipment across industries such as metallurgy, petroleum, chemical processing, building materials, and machinery.

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