PRODUCTS
Sillimanite Brick
Sillimanite brick is a firebrick with good properties prepared by high temperature firing or mud pouring of silicalite minerals. Silicalite is calcined at high temperature and converted into Mullite and free silica. Generally, high temperature firing method and mud pouring method are used for production. Silicalite is a kind of natural refractory mineral, which has the characteristics of low thermal expansion rate, resistance to the erosion of metallurgical slag and various glass liquids, and good wear resistance at high temperature. Its physical and chemical properties are better than those of
Composition: Premium materials such as high alumina oxide, magnesium oxide, and silicon carbide, with customizable composition based on client requirements.
Form: Available in powder, brick, board, and castable forms to suit various application needs.
Refractoriness: Standard range from 1200°C to 1800°C, with options for higher temperature customization.
Application Fields: Widely used in industries such as steel, cement, glass, and petrochemicals for furnace lining and insulation.
Packaging: Options include 25 kg bags, bulk bags, and custom packaging solutions compliant with global transportation standards.
Introduction
Our experienced R&D team can customize the material, form, and size according to your specific application needs while ensuring compliance with international quality standards. With rigorous quality control and advanced production facilities, we guarantee products with high refractoriness, excellent compressive strength, and long-lasting durability. Whether you are in the steel, cement, glass, or petrochemical industry, we are your trusted partner, supporting the success of your projects.
For customization inquiries, please feel free to contact us. We will provide tailor-made solutions based on your requirements.
Sillimanite Brick Details
Sillimanite brick is a firebrick with good properties prepared by high temperature firing or mud pouring of silicalite minerals. Silicalite is calcined at high temperature and converted into Mullite and free silica. Generally, high temperature firing method and mud pouring method are used for production.
Silicalite is a kind of natural refractory mineral, which has the characteristics of low thermal expansion rate, resistance to the erosion of metallurgical slag and various glass liquids, and good wear resistance at high temperature. Its physical and chemical properties are better than those of high aluminum brick, its fire resistance is 1770~1830℃, and the initial point of load softening is 1500~1650℃. Sillimanite brick is mainly used for forming liquid tunnel of glass tank kiln, blast furnace lining, furnace throat and ceramic industry kiln furniture. The natural silicalite - based refractories also have these advantages. Therefore, sillimanite brick is widely used in metallurgy, chemical and building materials industries.
Choice of aggregate
As can be seen from the granularity composition of sillistone, most of the coarse grains are below 0.2mm, which is too fine for coarse grains and too coarse for fine powder, which brings difficulties to reasonable particle grading. If the granulation is re-sintered, the production cost will be greatly increased, so appropriate coarse grains must be selected to meet the requirements of production and product performance. The mineral with similar properties to silicalite is mullite. The thermal expansion rate of synthetic mullite is 0.53% at 1 200 ℃, which is very close to that of natural silicalite. Therefore, it is more reasonable to introduce the coarse particles of synthetic Mullite into the silica wire stone products. After comparison, the synthetic mullite is selected from Chenxi, Hunan, and the crystal phasor of mullite is ≥95%.
Selection of binder
The physical and chemical properties of the binder for silicalite products are best close to that of natural silicalite, especially the chemical composition and thermal expansion coefficient, which should be basically consistent with that of natural silicalite. Comparatively speaking, the high-aluminum binder can meet these requirements, so the high-aluminum binder is selected.
Physical And Chemical Indicators
| Item | LS-65 | LS-60 |
| AL2O3% | ≥65 | ≥60 |
| SiO2% | ≤32 | ≤37 |
| Fe2O3% | ≤0.5 | ≤1 |
| Bulk density g/cm3 | ≥2.5 | ≥2.3 |
| Apparent porosity % | ≥18 | ≥19 |
| Cold crushing strength/ Mpa | ≥80 | ≥80 |
| Refractoriness under load(0.2MPa) °C | ≥1650 | ≥1600 |
Application
1. High temperature anti-wear coating;
Silica wire stone refractory ball;
3 styrene kaolin - silica wire refractory products;
4. High strength amorphous refractory, refractory mortar for building high temperature kilns;
5 rare earth composite silicon carbide material;
6 a composite heat-insulating high-temperature fire-resistant coating;
Refractory castable with self-reinforcing effect at high temperature.
