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Product Description
High-Purity Fused Mullite produced by Kaifeng Gaoda Refractories Co., Ltd. is made by smelting high-purity quartz sand and industrial alumina in electric arc furnaces. High-Purity Fused Mullite lumps are light gray with acicular crystal structure. It possesses excellent properties including low impurity content, high hardness, superior high-temperature mechanical properties, low porosity, high refractoriness under load, strong thermal shock resistance and good wear resistance. It is a premium raw material for making mullite products, as well as push plates, saggers and others used in high-temperature kilns. It is also anpremium raw material for making low-creep sillimanite bricks for blast furnaces and mullite bricks for alkali-free glass melting tanks.
Standard particle size/mm: 0–1, 1–3, 3–5, etc.
Product Name/Properties | Mullite | |
Chemical composition (%) | Al 2 O 3 | 71-76 |
SiO 2 | 23-28 | |
TiO 2 | - | |
Fe 2 O 3 | ≤0.16 | |
Na 2 O+K 2 O | ≤0.4 | |
Mullite phase content (%) | ≥95 | |
Glass phase content (%) | ≤5 | |
Coefficient of linear expansion (×10 -6 K -1 ) | 6.0 | |
Bulk density (g/cm³) | ≥3.0 | |
Refractoriness (°C) | ≥1850 | |
Particle and fine powder size | 0–1, 1–3, 3–5 mm, 0–180, 0–320 mesh | |
Particle size control:
5-3mm | 5.60 mm online ≤10% | ≤10% under 3 mm mesh |
3-1mm | 3.35 mm online ≤ 10% | ≤10% under 3 mm mesh |
1-0mm | 1.00 mm online ≤ 10% |
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| Unless otherwise specified, the oversize and undersize of other graded grit fractions shall each be not more than 10%. | ||
| For 0-grade grit, only the oversize shall be controlled to be not more than 10%, while the undersize is not controlled. Graded grits are governed by the national standard GB/T2481-1998. | ||
0-180 mesh | ≤10% on a 180-mesh screen | |
0-325 mesh | ≤10% on a 325-mesh screen | |
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High-Purity Fused Mullite
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Refractory Raw Materials Series
Why Choose Us
A full range of products
We supply a full series of refractory raw materials including Activated α-alumina Micropowder,Fused Calcium Aluminate Cement,Fused Alumina-Magnesia Spinel, as well as various unshaped refractories such as ladle castables and gunning mixes.
Wide range of product applications
Our products are widely applied in refractories, metallurgy, ceramics, chemical engineering and other sectors due to their stable performance and reliable quality.
Sold in multiple regions
Our products sell well in more than twenty provinces and municipalities nationwide, featuring premium raw materials, scientific formulations, precise manufacturing, stable performance and on-time delivery; we also export to many overseas countries.
Continuous Innovation
Quality is the core foundation of our company. We keep upgrading our products and technologies, committed to delivering reliable products and thoughtful services to all clients.
Kaifeng Gaoda Refractories Co., Ltd
Gaoda Refractories, specializing in refractory raw materials and unshaped refractories.
Our main products are Reactive αAl₂O₃ Micropowder, Fused Calcium Aluminate Cement, Fused AluminaMagnesia Spinel, Fused Mullite, White Fused Alumina, Alumina Hollow Spheres and other refractory raw materials, as well as monolithic refractories including castables for ladles, castables for iron runners and gunning mixes. Thanks to their excellent performance and high quality, products are widely applied in refractory materials, metallurgy, ceramics, chemical and other industries.
Honors
FAQ
Q
What is the regular packaging for products?
A
Regular packaging is available in 1-ton jumbo bags or 25kg small bags. Customized packaging and LOGO printing are supported.
Q
How to select reactive alumina micropowder?
A
Our reactive alumina micropowder is available in three grades including GD370, Type A, Type B as classified by varying fineness degree. Grades can be selected according to usage requirement.
Q
What are the differences among different grades of fused calcium aluminate cement?
A
Cement grades are classified by alumina content and are AL-71, AL-75, AL-80, AL-85 and AL-90. Appropriate grades can be selected according to operating conditions.
Q
Besides reactive alumina micropowder and fused calcium aluminate cement, what other refractory products are available? Can technical support be provided?
A
We also supply full-series refractory raw materials including fused alumina-magnesia spinel, white fused alumina, alumina hollow spheres, and mullite, as well as various monolithic refractories such as ladle castables, castables for iron runners and gunning mix. Grade suggestions, indicator adjustments and supporting technical schemes can be offered according to your operating conditions.
Q
Can products be customized according to indicators?
A
All full-series refractory raw materials of our company can be customized by adjusting indicators in response to clients' actual operating conditions.
Q
Can samples be provided?
A
Yes
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