5-8/10mm White Fused Tabular Corundum

Advantage

1. Dense plate-like crystal structure
The interlocking tabular α-alumina crystals with good growth of 5-8/10mm white fused tabular corundum suppressed volume shrinkage during repeated high-temperature firing. The refractory bricks and castables mixed with this aggregate exhibit a shrinkage rate of less than 0.3%, avoiding lining cracking and gap expansion during long-term furnace operation, which is more prominent than ordinary fused alumina with a shrinkage rate exceeding 0.8%.
2. Low impurity
Strictly controlled iron, sodium, and silica oxides can prevent the formation of low melting point eutectic glass inside refractory materials, effectively preventing the infiltration of molten steel, cement clinker, and glass slag into the lining structure, significantly extending the furnace maintenance cycle.
3. Thermal shock resistance
The enclosed internal pore structure buffers the rapid rise and fall of temperature. The refractory components mixed with 5-10mm tabular corundum can withstand more than 20 cycles of cold and hot alternation without peeling off, perfectly matching the production rhythm of intermittent steelmaking and cement kilns.
4. Balance the particle size distribution of the medium
Fill the gap between coarse aggregate and fine powder in the 5-10mm medium particle refractory material formula, optimize the material packing density, reduce the amount of cement binder used, and lower the overall raw material procurement cost of refractory material manufacturers.
5. General chemical inertness
A stable corundum crystal matrix can resist the corrosion of acidic sulfur flue gas and alkaline slag, and is suitable for neutral, weak acid, and weak alkali high-temperature working environments without causing structural degradation.

Application

1. Steel and metallurgical industry
5-8/10mm white fused tabular corundum is the main aggregate for aluminum carbon, magnesium aluminum carbon, and spinel refractory bricks used as blast furnace troughs, ladle liners, and continuous casting nozzles. Its slag resistance can resist the erosion of molten steel and high-temperature blast furnace slag, and compared with ordinary molten alumina aggregate formula, the service life of the ladle is extended by more than 40%.
2. Manufacturing of cement lime kiln
Add high aluminum low cement castables to the transition zone of the rotary kiln and the lining of the preheater. Low reheat shrinkage rate can prevent cracking of castables under long-term cyclic heating of cement clinker, reducing the frequency of kiln shutdown maintenance.
3. Refractory materials
99.5% high-purity customized fraction is mixed into aluminum chromium refractory blocks on the glass jar wall; Ultra low iron impurities prevent the glass liquid from changing color, ensuring the quality of high transparency finished glass without raw material pollution.
4. Nonferrous metal smelting
The lining castables prepared for copper, aluminum, and nickel smelting furnaces are resistant to corrosion from non-ferrous metal melts and acidic smelting flue gas, solving the problem of rapid lining thinning of low-grade aggregate refractory materials.

The comprehensive cost saving value of refractory material manufacturers

1. Reduce the scrap rate of refractory products
The low shrinkage and uniform particle size distribution have reduced the cracking scrap rate of finished bricks/castables from 12-18% (commonly found in cheap molten particles) to below 5%, directly increasing the finished product output and factory profit margin.
2. Extend the service life of kiln lining
The running time of refractory lining mixed with our 5-8/10mm aggregate is 2-3 times longer than that of refractory lining using brown corundum or low purity white particles, thereby reducing unplanned downtime losses caused by frequent lining replacement.
3. Reduce the consumption of adhesive raw materials
Reasonable filling of medium particles has increased the bulk density of refractory material batches, reducing the amount of calcium aluminate cement binder required per ton of castable by about 10%, steadily reducing the comprehensive raw material expenditure for large-scale production.

Basic Information

Technical Data

Why choose our HUAO's 5-8/10mm white fused tabular corundum?

1. Target granularity screening system
Our unique multi-layer vibrating screen in Huao strictly separates the 5-8mm and 8-10mm particle sizes, controlling the content of oversized and undersized particles below 2% to ensure consistency in the formulation and batching effect of refractory material factories.
2. Batch multi index detection
Each production batch must undergo chemical composition, bulk density, shrinkage rate, and thermal shock testing before being stored; Provide complete testing reports for each batch of goods and support third-party independent laboratory verification.
3. Support small batch trials and bulk orders
The minimum trial order threshold for new formula testing is 500kg; with a stable annual output of 10000 tons and permanent sufficient inventory, standard orders will be delivered within 8-13 working days, and urgent kiln raw material orders will be prioritized.
4. Moisture resistant export grade packaging
For large orders, waterproof ton bags, pallets, and cardboard are used to prevent moisture and control risks such as clumping and water exposure during cross ocean transportation.

FAQ

Q1: Can this medium grained corundum be mixed with fine flakes of 0-3mm powder for low cement castables?
A1: Of course. Our technical team can provide a recommended mixing ratio of 5-10mm medium aggregate+coarse particles+fine powder based on your target density and shrinkage index of the castable, maximizing the durability of the lining while reducing the use of adhesives.
Q2: What is the maximum continuous temperature that refractory products using this type of aggregate can withstand?
A2: The refractory bricks and castables are mixed with our standard grade to maintain stable performance during long-term operation at 1700 ℃; The customized high-purity version supports continuous operating temperatures of up to 1800 ℃ for ultra-high temperature glass kilns.
Q3: Do you provide free test samples for refractory formula testing?
A3: We provide free small samples of 1-3kg; Customers only pay for international express delivery fees, which can be fully deducted from subsequent formal bulk orders after performance verification on the production line.