Customized Size 98 SiO2 Silica Fire Brick Furnace Silica Refractory Brick For

Description of Fused silica brick

Fused silica brick are also called Fused silica bricks or thermal shock-resistant silica bricks. Fused silica brick have good thermal shock stability, soft weight temperature, different physical and chemical indicators, and close to zero expansion rate. It is mainly used for maintenance of glass kiln and coke oven in hot state. It does not expand at high temperature and has good rapid cooling and rapid heating. The chemical properties of Fused silica brick are good and stable at high temperature; after repairing the glass melting furnace, there is no impurity pollution, no erosion and peeling phenomenon, and it is reliable for long-term use. Compared with traditional hot-repair products, Fused silica brick are easy to use, reduce the labor intensity of operators in harsh environments, and can be repaired during the operation of the glass melting furnace, saving energy and improving economic benefits.

Specificaions of Fused silica brick

Product features of Fused silica brick

1. Fused silica brick have good thermal shock stability; after more than 30 cycles of water cooling at 1100°C, the product has no dimensional change, no cracking, no deformation, and can be directly repaired at high temperature without stopping the furnace.

2. The thermal expansion rate of Fused silica brick is close to zero.

3. The softening temperature under load of Fused silica brick is high, reaching 1680°C. The chemical properties are good and stable at high temperatures. After the glass kiln is repaired, there is no impurity pollution, no erosion and peeling, and it is reliable for long-term use.

Reasons for the low expansion rate of Fused silica brick

(1) The main mineral phase of Fused silica brick is amorphous silica, accounting for more than 90%. Fused silica brick are made of high-grade quartz ore, which are melted, cooled, crushed, screened, pickled and other processes The fused silica material is prepared, and its particles are mixed with a small amount of mineralizer and sintering agent to form a semi-dry mud material, which is made by pressing, drying and firing processes. The main mineral component is amorphous amorphous fused silica. The coefficient of thermal expansion of Fused silica brick based on amorphous fused silica is close to zero, so they are called Fused silica brick.

(2) Fused silica brick have the atomic structure of amorphous amorphous fused silica

The same is silicon dioxide, but the structure of amorphous SiO2 is different from that of crystalline SiO2. The thermodynamic properties of the material are determined by the atomic crystal structure. SiO2 has a variety of homogeneous crystal structures. The crystal phases formed under different conditions have different structures, so the thermodynamic properties are different.

Once the bond angle of crystalline SiO2 changes when it is heated, it will start isomorphic transformation at 180℃, accompanied by huge volume expansion, so its thermal stability is extremely poor. 1100 ℃ water cooling once will crack, amorphous SO2 has the characteristics of small thermal expansion coefficient, excellent thermal stability, high temperature viscosity, small thermal conductivity and other characteristics. However, amorphous SiO2 is an unstable state at high temperature, and there will be no volume change when heated within 1100℃. However, as the temperature rises, amorphous SiO2 begins to crystallize. Because the crystallization process is slow, it is still in the hot repair process. Can well meet the construction requirements. The expansion of Fused silica brick is almost zero, and the prices of the two types are different.

1. Fused silica brick can be used as material for glass kiln hot repair.

2. Fused silica brick can be used as material for coke oven hot repair.

 Packing of Fused silica brick

 Shipping of Fused silica brick

1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
4.We will shipping and delivery goods timely, quanlity and quantity guaranteed, and also in accordance with the contract and customer's requirment completely.

1. Strong professional:
Our company has thirty years producing experience in refractory products. Our manager will supervise on a various refractorys production materials, process control, quality supervision and package delivery, and ensure the products are 100% qualified.

2.Annual supply:
Our company has passed ISO9001 quality management system certification and SGS certification. And the annual supply of shaped and unshaped refractory product is 28, 800-35, 000 tons.

3. Export experiences:
Now we have gained a global sales network reaching Taiwan, Russia, Vietnam, Pakistan, Bulgaria, French, India, Congo, Angola, South Africa, and so on.

4. Production equipment:
Production and testing equipments are new, complete and automated or semi- automated. Such modern facilities and equipments have provided the fine technical guarantee for the production and testing.

5. Testing equipment:
Our company's testing equipments as follows:
High Temperature RUL Tester
Bulk Density Tester
The Pressure Tester
Refractoriness Tester

Certificates