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Silica Refractory Bricks
- Minimum Order Quantity
- 27 Metric Tons
- FOB Port
- Mundra Port, India
- Payment Terms
- Cash on Delivery (COD), Cash in Advance (CID), Cheque, Telegraphic Transfer (T/T)
- Supply Ability
- 500 MT Per Month
- Delivery Time
- 15 Days
- Sample Available
- Sample Policy
- Contact us for information regarding our sample policy
- Packaging Details
- PACKED IN FUMIGATED WOODEN PALLETS OF 36”X36”
- Main Export Market(s)
- Asia, Middle East, Africa
- CERTIFICATE OF ORIGIN, FUMIGATION CERTIFICATE, TEST REPORT
Silica Refractory Bricks
Banking on our decades of industrial knowledge and experiences, we are offering an exceptional range of Silica Refractory Bricks. These bricks are commonly used in the furnaces and kilns found in industries like steel, cement, non-ferrous metals and glass. Our Silica Refractory Bricks are designed from top quality silica at our state of the art manufacturing unit by a team of veteran engineers. Moreover, these bricks are checked on the parameters of durability, finishing and impact strength prior to dispatch.
- Excellent density, porosity and cold crushing strength
- High refractoriness under load with good thermal shock resistance
- Can also be customized as per the exact demands of the clients
Silica refractories mainly consist silicon dioxide (SiO2). Not taking into account impurities of raw materials, silica refractories also comprise calcium compounds produced from calcium hydroxide which is a bonding agent here. The fired silica brick comprises crystalline SiO2 modifications cristobalite, some residual quartz and tridymite. During the process of firing, the lime reacts with finest quartzite elements to form wollastonite (CaO.SiO2). Also, the matrix contains very small quantities of hematite, magnetite, calcium ferrite, calcium olivine and hedenbergite, which are formed from the impurities. These are crystalline phases, and are the reason for discoloration & spot formation on the fired bricks.
The converted coarse grain consists cristobalite, a residual quartz proportion corresponding to the degree of transformation, and minute tridymite, while the fine grained matrix is improved with tridymite, wollastonite and glass. Silica bricks having equal chemical composition can have different mineralogical compositions. This can cause reasonably different behavior throughout the use. As a result, it is not always necessary to evaluate silica bricks exclusively by their chemical composition. It is good to consider the transformation degree and thermal expansion behavior of the bricks.
The transformation degree can be determined by the density of the content of residual quartzite. When the degree of transformation is extreme, the density of fired silica bricks is lowest. It reaches the value of 2.33 g/cu cm with comprehensive transformation. The density enables conclusions to be drawn with respect to the unalterable after-expansion, which must be estimated during the service. The transformation degree can be calculated more accurately with the assistance of residual quartz content, which is defined by the analysis of radiographic phase, or X-ray diffraction examination.
|Colour||Density||Residual quartz||Degree of transformation||Linear after expansion(according to quartzite type|
|Greenish white||Above 2.45||20 or greater||Low||2-3|
|Evenly brown||About 2.40||15-20||Medium||1-2|
|Light brown spotty or yellowish white||Below 2.35||Less than 6||Very good||Less than 1|