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Address: Group 4, Chuling Village, Chaohua Town, Zhengzhou, Henan, China
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Fire Industry Chrome Cr2o3 Brick For Steel Melting Furnace
High chrome bricks are made of industrial grade chromium trioxide and alumina as the main raw materials, or introduce a small amount of zirconia, etc., after high temperature firing, the content of chrome trioxide is not less than 75%, chrome trioxide, alumina and Shaped refractory products with a total content of zirconia not less than 98%. It has excellent corrosion resistance, high compressive strength at room temperature, high strength at high temperature, excellent wear resistance, high refractoriness, excellent thermal shock resistance, and good volume stability at high temperatures.
High chrome bricks are divided into four grades according to the
content of chrome trioxide: GGZ-75, GGZ-85, GGZ-90, GGZ-95. In the
grades, G, G, Z- are the initials of the Chinese phonetic alphabet
of Gao, chrome, and brick respectively, and the Arabic numerals are
the mass fractions of chromium trioxide.
China refractory manufacturer low price high chrome brick for rock
wool and glass fiber furnace
High chrome brick technical data:
| Item | HT-GG90 | HT-GG85 | HT-GG60 | HT-GG30 | HT-GG12 | HT-GG03 |
| Cr2O3 % | ≥93 | ≥86 | ≥60 | ≥30 | ≥12 | ≥3 |
| Al2O3 % | — | — | ≤38 | ≤68 | ≤80 | ≤90 |
| Fe2O3 % | — | — | ≤0.2 | ≤0.2 | ≤0.5 | ≤0.5 |
| Apparent porosity % | ≤17 | ≤17 | ≤14 | ≤16 | ≤18 | ≤16 |
| Bulk Density g/cm3 | ≥4.3 | ≥4.2 | ≥3.63 | ≥3.53 | ≥3.3 | ≥3.25 |
| Cold compressive strength, Mpa | ≥100 | ≥100 | ≥130 | ≥130 | ≥120 | ≥120 |
| Refractoriness under load °C,(0.2MPa,0.6%) | ≥1680 | ≥1670 | ≥1700 | ≥1700 | ≥1700 | ≥1700 |
| Linear change rate % (1600°C×3h) | ±0.2 | ±0.2 | ±0.2 | ±0.2 | ±0.2 | ±0.2 |
The raw material used in the high chrome series products is a solid solution synthesized by high-temperature melting of alumina and chromium oxide in a certain proportion. The production process of special refractory materials is used to make refractory bricks, which can improve and enhance the internal quality of the product and the high temperature performance of the product. It has the characteristics of high refractoriness, high strength, good thermal shock stability, and strong corrosion resistance. Erosion, abrasion resistance, corrosion resistance, and structural spalling resistance have been used in metallurgy, glass, carbon black, and petrochemical industries.
The cinder erosion resistance of High chrome brick
(1) The slag resistance of high chrome bricks. Coal melting is an
acidic slag with a low melting point and is very corrosive to
refractory materials. Both theory and practice show that high
chromium bricks are refractory materials with good resistance to
cinder erosion.
(2) With the increase of temperature, the viscosity of coal slag is
greatly reduced.
(3) The large solubility of various refractory oxides in coal slag
is lower than that of chrome oxide.
(4) Erosion rate of furnace lining. With the increase of chromium
oxide content, the corrosion rate of the furnace lining decreases.
The relationship between lining erosion rate and chromium oxide
content.
(5) The anti-slag erosion rate of high chrome bricks with chrome
oxide content of 60% ~ 90%.
In order to lower the melting point of coal slag and ensure the
smooth production, the coal water slurry
A certain amount of lime (CaO) is added to the coal raw materials
for the gasifier. Eventually, calcium oxide in the coal slag
increases, and the corrosion resistance rate of high chromium
bricks accelerates. The erosion rate of coal with different CaO
content on high chromium bricks is different.
Main high Chrome brick size:
Straight size:230×114×65 230×114×75 230×57×65
Split size: 230×114×32 230×114×40 230×114×25 230×114×50
Arch/Wedge size: 230×114×65/45 230×114×65/55 230×114×75/45
230×114×75/55 230×114×75/65
Tile size: 230×230×38 230×230×50 230×230×65 230×230×75
Other size: Key brick, Skew brick, Soap, Checker, Neck, Taper
Also produce high chrome bricks according to customers' needs
China refractory manufacturer low price high chrome brick for rock wool and glass fiber furnace
1.The high chrome brick Production Process
Crushing→Mixing→Shaping→Drying→Firing→Inspection→Packaging and
Shipment
The high chrome bricks use α-Al2O3 as raw material, adding
appropriate amount of chrome oxide powder and fine chromium
corundum clinker powder, after forming, sintering at high
temperature. The chrome oxide content of sintered chrome rigid
brick is generally lower than that of fused-cast chrome corundum
brick. It can also be prepared by the slurry casting method. The
α-Al2O3 powder and the chrome oxide powder are uniformly mixed, and
the glue and organic binder are added to make a thick slurry. At
the same time, part of the chrome corundum clinker is added, and
the brick is made by the grouting method. Fire again. It can be
used as glass kiln lining, wire drawing glass flow hole cover tile
and as back lining for hot metal pretreatment device, garbage
incinerator, coal water slurry pressurized gasifier, etc.
High chrome brick usage:
High chrome bricks are mainly suitable for working linings of related reducing atmosphere industrial furnaces such as coal water slurry pressurized gasifiers.
The operating temperature has a great influence on the service life of high chrome bricks. The higher the temperature, the greater the damage rate and the lower the service life of the bricks. In the working environment of the coal water slurry gasifier, it will be reduced or significantly reduced due to the high temperature. The essential reason for the service life of high chrome bricks is that high temperature changes or significantly changes the viscosity-temperature characteristics of cinders. The higher the temperature, the lower the viscosity and the better the fluidity. The more serious the erosion and penetration of the bricks, the more erosion rate. The greater the life expectancy.
China refractory manufacturer low price high chrome brick for rock wool and glass fiber furnace
Packaging for high Chrome brick
1.Pallet+Paper or Steel angle bead+Paper board +Plastic or Steel
belt +Plastic film
(1)Wooden pallet size:Usually0.92*0.92m(standard brick),but 1*1m
(special shape brick) at most,
(2)Load weight of each pallet:Usually 1.5-1.7Tons, max 2.0 Tons.
(3)20 Foot Container can be loaded max 25-26Tons, about
13-16Pallets.
2.Can make the package according to customer's requirements.
Shipping for high Chrome brick
1.FEDEX/DHL/UPS/TNT for samples.
2.By Sea for batch goods.
3.Customers specifying freight forwarders or negotiable shipping
methods!
4.Delivery Time of high Chrome brick:
(1)Samples:3 days for common shape samples;15 days for special
shape samples.
(2)Batch goods:Within 7-10 days for in stock high chrome bricks
from ordering shipping space to deliver goods and within 20-30 days
for NO in stock high chrome bricks.
High Chrome Brick Payment Terms
(1)T/T, Western Union,LC;
(2)Usually 30% deposits,70% balance to be paid before delivery or
against copy of BL or negotiations
Others
1. MOQ: Usually 1 container, MOQ 1Tons, Customers can order certain
PCS for special high chrome brick.
China refractory manufacturer low price high chrome brick for rock wool and glass fiber furnace
High alumina brick
Corundum Brick
High Alumina Castable
Jerry Li
Cell&WhatsApp: 0086-13373957739
Email: jerry(at)firebricks-supplies.com
