Low Creep High Quality Silica bricks for glass furnaces, coke ovens and foundries according to customer requirements;
In general, silica bricks are used for coke and annealing furnace, covering the walls of the furnaces, in high heat areas of melting furnaces.
Advantage:
1) Silicon oxide is above 95%.
2) Good acid erosion resistance.
3) High softening point with temperature.
4) No shrink in burn repeatedly.
5) Temperature of refractoriness under load is above 1650º C Stable Capability, High Quality, Excellent Service, Competitive price is the most important advantage of our products.
|
Technical Specifications |
|
SiO2 |
max (%) |
94-96 |
|
Al2O3 |
min (%) |
1.5-1.0 |
|
Fe2O3 |
min (%) |
0.8-1.5 |
|
Apparent porosity |
(%) |
22-24 |
|
Cold crushing strength |
(MPa) |
30-45 |
|
Refractoriness under load |
(ºC) |
1650-1680 |
|
Thermal expansion coefficient (1000ºC) |
(%) |
1.25-1.30 |
|
Bulk density |
(g/cm ³) |
2.34-2.35 |
|
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 |
HBF-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 |
North Refractories Co. Ltd (NRCL) was founded by Mr Sun from 15 years ago and from the year 2007 we started our exporting business via our sales company Beijing North Refractories Co. Ltd, we focus on refractory and heat insulation materials manufacturing, serving for wide range industries where high temperatures exist. Such as steel & iron, aluminum, glass industry, ceramics, power plant, petrochemical, foundry industries and so on.
Main product list:
CALCIUM SILICATE INSULATION MATERIALS: Calcium silicate pipe section, calcium silicate 650C, calcium silicate 1000C, calcium silicate block 1100C, super calcium silicate, high density calcium silicate insulation shapes, non-wetting calcium silicate, water proof calcium silicate board, carbon fiber reinforced calcium silicate, glass fiber reinforced calcium silicate.
CERAMIC FIBER INSULATION: Ceramic fiber blankets, ceramic fiber boards, ceramic fiber modules, ceramic fiber bulk, ceramic fiber papers, ceramic fiber felt, ceramic fiber top out cone, ceramic fiber special shapes, ceramic fiber binders, ceramic fiber coatings.
ECO FIBER INSULATION MATERIALS: Soluble fiber blankets, soluble fiber board, soluble fiber paper
REFRACTORY BRICKS: High alumina refractory bricks, SiC bricks, Fused Cast Refractory Bricks.
