Silica Brick For Coke Oven CMAX-1

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Product Description:

1. Silica brick is the main refractory bricks used in glass melting furnace;its main crystal phase is Tridymite.
2. Silica brick for glass melting furnace is used in building checker chamber, chute, combustion chamber,coking chamber,and furnace arch etc.
3. Silica brick for glass furnace have following characters:
(1)High refractoriness under load.
(2)High heat conductivity.
(3)Good thermal shock resistance.
(4)Solidity stable of capacity in high temperature.

Tech Data

Silica brick for glass furnace

Item:

GF-96A

GF-96B

GF-95A

GF-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

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




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Q:What role does silica play in refractories?
The production of clay brick refractory clay raw material is natural, its main mineral is kaolinite (formula Al2O3 - 2SiO2 - 2H2O), clay brick containing SiO2 in 45% ~ 65%, belongs to the weak acid refractory materials, have a certain ability to resist acid slag, but easy to be alkaline slag erosion.
Q:How to judge the quality of brick, clay brick, high alumina brick furnace from the appearance?
Mainly depends on the color and density of brick. Another black clay brick and brick with iron oxide formation and how much the size of bricks
Q:The hot blast stove when the temperature did not rise against the brick interface decreased
How to keep the brick masonry temperature not lower than 600 DEG C, while the exhaust temperature is not higher than 400 DEG C.
Q:What are the materials for refractory materials? What are their names?
The main raw material is the main body of refractory. Auxiliary raw materials can be divided into binders and additives. The role of bonding agent is to make the refractory body in the production and use process has enough strength. There are commonly used lignin, phenolic resin, asphalt, cement, water glass, phosphoric acid and phosphate, sulfate, some main raw material itself has the effect of binder, such as clay; additive is to improve the production of refractory materials and construction technology, or strengthen the refractory material of some properties, such as stabilizer, water reducing agent, inhibitor, plasticizer, foaming agent, dispersing agent, bulking agent, antioxidant.
Q:The formula in the refractory brick, and firing curve, who knows?
Add 1.8-2.2% of the total weight of the main raw material, and then add lime milk, rolling for 10-15 minutes, and finally add pulp, rolling for 10-15 minutes, out of the mill, forming billet.
Q:Can not use it two brick
Acidic silica brick refractory material, has good ability in acid slag erosion
Q:Why will expand when heated brick
Because the production of raw materials are silica brick, brick with SiO2 content of not less than 95% of silica as raw materials, adding mineralizer and binder, through mixing, molding, drying, sintering and other processes in the system
Q:The difference between clay refractory bricks and refractory brick in the application.
Brick bearing soft temperature and close to the melting point, high temperature strength, can be in high temperature (above 1400 degrees) under the condition of long-term use, but the anti alkali erosion ability, thermal shock stability is the worst, a scrap. The brick is generally used in the coke oven, glass kiln. Other industries basically do not use.
Q:The introduction of silica brick?
An acid refractory consisting mainly of quartz and square quartz and a small amount of residual quartz and glass.More than 94% silica content. True density 2.35g/cm3. With acid resistance, slag erosion performance. Higher high temperature strength. The softening start temperature is 1620~1670 degrees. Long term use at high temperature without deformation. The thermal shock resistance is low (the heat exchange in water is 1~4 times). The natural silica is used as the raw material, and a proper amount of mineralizer is used to promote the transformation of quartz into quartz in the body. Slowly sintered at 1350~1430 DEG C in the reducing atmosphere. When heating up to 1450 degrees, the total volume of 1.5~2.2% expands, and the residual expansion can close the kerf and ensure the airtight and structural strength of the masonry.
Q:The difference between clay refractory bricks and refractory brick in the application??
The ability of alkali resistance is poor, the thermal shock stability is the worst, and it is scrapped at one time. The brick is generally used in the coke oven, glass kiln. Other industries basically do not use.

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