Henan Hongtai Kiln Refractory Co.,Ltd.
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Silica thermal insulation brick for the top of light-weight silica brick rolling heating furnace
Lightweight silica bricks are also called silica heat insulating bricks. Lightweight refractory with a silica content of more than 91% and a bulk density of less than 1.2g/cm3. The refractoriness and softening temperature under load are not much different from ordinary silica bricks with the same composition. However, due to the large number of pores, the compressive strength, slag resistance and corrosion resistance are not as good as ordinary silica bricks, but the thermal shock resistance is improved.
Advantages of lightweight silica bricks
1. Lightweight silica bricks are unmatched by lightweight clay bricks. Lightweight silica bricks with a porosity of about 50% have lower thermal conductivity than lightweight clay bricks.
2. The deformation temperature under load reaches 1620-1640°C, while the lightweight clay brick is only 1200-1300°C. It does not shrink at high temperature, but expands (about <0.2%) at 1450°C, and the volume is stable, while the clay lightweight brick shrinks greatly. It is easy to crack the furnace lining.
3. It can be used for a long time in furnaces and kilns working at a temperature of 1550~1600 °C; it can be directly laid on the hot surface contacting the furnace gas, and can also be used for large-span furnace roofs; it can be used in high temperature places where light clay bricks cannot be used. Use lightweight silica bricks.
4. The use of light silica bricks in the lining of the heating furnace can shorten the heating period and reduce the fuel consumption by 35% compared with the use of light clay bricks. The use of lightweight silica bricks on the top of the firing kiln (down-flame kiln) can prolong the service life of the top of the furnace.
Lightweight silica bricks are usually used in industrial furnaces or furnace tops such as steel rolling heating furnace tops, hot blast furnaces, glass furnaces, etc., and can be in direct contact with the flame.
Silica thermal insulation brick for the top of light-weight silica brick rolling heating furnace
Technical date of silica brick, quartz fire brick
Please feel free to let us know your refractories needs, we will offer you the most suitable solution for you.
| Silica brick for glass furnace | |||||
| Item: | BG-96A | BG-96B | BG-95A | BG-95B | |
| SiO 2 | ≥96 | ≥96 | ≥95 | ≥95 | |
| Fe 2 O 3 | ≤0.8 | ≤1.0 | ≤1.2 | ≤1.2 | |
| Apparent porosity % | ≤22(24) | ||||
| Cold Crushing Strength MPa | Brick below20KG | ≥35(30) | |||
| Brick ≥20KG | ≥30(25) | ||||
| Refractoriness under load ºC | ≥1680 | ≥1670 | ≥1660 | ≥1650 | |
| True density g/cm ³ | ≤2.34 | ≤2.34 | ≤2.35 | ≤2.35 | |
| Silica brick for coke oven | ||
| Item: | CO-94A | CO-94B |
| SiO2: % | ≥94 | ≥94 |
| Al 2 O 3 : % | ≤ 1.5 | ≤ 1.5 |
| Fe2O3: % | ≤ 1.5 | ≤ 1.5 |
| Refractoriness under load 0.2Mpa | ≥ 1650ºC | ≥ 1650ºC |
| Apparent porosity: % | ≤ 22 | ≤ 24 |
| Bulk density: g/cm ³ | ≤ 2.34 | ≤ 2.35 |
| Cold crushing strength: MPa | ≥30 | ≥25 |
| Permanent linear change % (1450ºC ×2h) | 0~0.2 | 0~0.2 |
| Thermal expansion(1000ºC) | ≤1.28 | ≤1.30 |
| Silica brick for hot blast furnace | |
| Item | RG-95 |
| SiO2 | ≥ 95 |
| Al2O3 | ≤ 1.0 |
| Fe2O3 | ≤1.3 |
| Apparent porosity % | ≤22(24) |
| Cold crushing strength MPa | ≥45(35) |
| Remaining quarts % | ≤1.0 |
| Refractoriness under load ºC | ≥1650 |
| Creep(0.2Mpa ×1550ºC×50h) % | ≤0.8 |
| Thermal expansion coefficient (1000ºC) % | ≤1.25 |
| Apparent density g/cm ³ | ≤2.32 |
Silica thermal insulation brick for the top of light-weight silica brick rolling heating furnace
1.Glass melting furnace, ceramic frit kiln, sodium silicate furnace, soaking furnace, ceramic kiln, etc
2.Coke oven's coking chamber, combustion chamber walls, steel open-hearth's regenerator and sediment chamber, etc.
3.Load-bearing parts of high temperature hot blast stove and acid open-hearth furnace roof, etc.
Silica thermal insulation brick for the top of light-weight silica brick rolling heating furnace
Size of silica brick
| Straight Type | Arch Type | Wedge Type |
| L×W×H (mm) 230×114×65 230×114×75 230×114×32 220×110×60 220×110×50 220×110×40 220×110×30 | L×W×H/h (mm) 230×114×65/55 230×114×65/45 230×114×65/59 220×110×65/50 220×110×75/65 220×110×60/40 | L×W×H/h (mm) 230×114×65/55 230×114×65/45 220×110×75/65 220×110×60/40 |
| Other Sizes Can Be Customized | ||
Silica thermal insulation brick for the top of light-weight silica brick rolling heating furnace
Silica thermal insulation brick for the top of light-weight silica brick rolling heating furnace
Production process of silica brick, quartz fire brick
1)Raw material to factory→checkout→burdening→stirring→mixing→taking out the raw material,
2)Crushing→Mixing→Shaping→Drying→Firing→Inspection→Packaging and Shipment.
2.Quality Assurance
1)Going out the furnace→checkout→packing→qualified product→putting in storage→sale,
2)The process from raw to product are strictly tested by equipment.
1.Inspection and Control of incoming raw materials: according to the chemical content,raw materials are classified into different levels to ensure quality of brick first.
2.Inspection and control of the process: during the production,every brick will be weighed twice strictly to reduce the error of weight .
3.Quality audit by quality management: inspection of product standardization of quality of each product by process control and experimentation, taking corrective measures timely whenever deviations are noted.
4.Before delivery, the inspectors will inspect the size,appearance, physical and chemical properties of silica brick, quartz fire brick again in factory.
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, Korea, 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