Ladle tundish castable High alumina Low cement refractory cement

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25 m.t.
Supply Capability:
2000 m.t./month

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Definition

It is a non-metal inorganic construction material based on calcium aluminate(CaO•Al2O3) or calcium dialuminate(2CaO•Al2O3).It is made up by the way of having natural bauxite or industrial alumina and calcium carbonate(limestone) which are in certain proportion calcined or electric melted, it can also be made through melting laterite and limestone. Compared with silicate cement, calcium aluminate cement has a higher refractoriness, thus it is widely used as binder of refractory castable.

 

Category

Calcium aluminate cement is sorted into two kinds by chemical composition: common calcium aluminate cement (Al2O353%~72%,CaO21%~35%) and pure calcium aluminate cement(Al2O372%~82%,CaO19%~23%). And common calcium aluminate cement is divided into low iron type(Fe2O3<2.0%) and high iron type(Fe2O37%~16%). The low iron type calcium aluminate cement which has a Al2O3 content of 53%~56% and CaO of 33%~35% is called bauxite cement; the one which has a Al2O3 content of 59%~61% and CaO of 27%~31% is called Aluminium-60 cement; the one which has a Al2O3 content of 65%~70% and CaO of 21%~24% is called low calcium aluminate cement, another kind is fast hardening super early strength calcium aluminate cement. And pure calcium aluminate cement is divided into conventional type (Al2O3 content is 72%~78%)and super high alumina type(Al2O3 content is 78%~85%).

 

Specifications:

 

Specification of three grads of CA50

Mark

A600

A700

A900

Composition

(%)

SiO2

7.8

7.5

5.5

Al2O3

50.0

51.0

53.5

Fe2O3

2.5

2.5

2.5

Fe2O3

0.4

0.4

0.4

SSB (m2/kg)

300

320

350

Initial Setting Time(min)

45

60

90

Final Setting Time (h)

6

6

6

Breaking Strength(MPa)

1d

6.0

6.5

8.0

3d

7.0

7.5

10.0

Compressive Strength(MPa)

1d

45

55

72

3d

55

65

82

 

 

Item Briand

 

CA70

 

CA80

 

 

Chemical Composition

         %

SiO2

1.0

0.5

AL2O3

68.0

77.0

Fe2O3

0.7

0.5

R2O

0.4

0.4

S

0.1

0.1

Cl

0.1

0.1

325M Residue on Sieve (%)

5

5

Surface Area (m2/kg)

400

450

Initial Setting Time (min)

45

45

Final Setting Time (h)

6

6

 

Breaking Strength

     (MPa)

6h

--

--

1d

5.5

5.0

3d

6.5

6.0

 

Compressive Strength

     (MPa)

6h

--

--

1d

40

30

3d

50

40

 

Application

 

Calcium aluminate cement is mainly used as binder of refractory castable and gunning mix. Common calcium aluminate cement is applicable to low-grage and medium-grade refractory castable, such as firecaly castable and high alumina castable etc; Pure calcium aluminate cement is applicable to high-grade refractory castable, such as corundom castable, mullite castable, chrome containing corundum castable and spinel castable etc; The calcium aluminate cement addition quantity of common refractory castable is 10%~20%, low cement castable is 5%~10%, super low cement castable is less than 5%. Addictives which can improve workability may be added to castables bond by calcium aluminate cement so as to meet the requirements of construction, such as setting accelerator, setting retarder, water reducer (dispersant), plasticizer etc.

Ladle tundish castable High alumina Low cement refractory cement

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Q:What are the main materials in concrete fireproofing material?
it can be roughly divided into: fire-resistant coating for steel structure, finishing fire retardant paint, tunnel fire coatings, concrete fire retardant coating, cable refractory coating. fire-resistant coating for steel structure is divided into: Indoor ultra-thin fireproof coatings for steel structure, indoor thin steel structure fireproofing coating, indoor thick steel structure fireproofing coating, outdoor ultra-thin fireproof coatings for steel structure, Outdoor thin steel structure fireproofing coating, outdoor thick steel fireproofing coating. I hope it can help you. Hope to adopt my opinion Thank you! )
Q:Which schools are the best schools in the world for learning knowledge about refractories?
Wish it helps you out.
Q:It the Special Fire-Proof Material belonged to ceramics? Is there a national standard of the Special Fire-Proof Material?
The fiber and reinforcing material of the metal ceramic is also belonged to the Special Fire-Proof Material. ~~~~GB is too much trouble, GB online should ~~~ Lei Bao Refractories for you. The high temperature inorganic coating. 5. The refractory compound. 3. The high melting point oxide. You can search it on the internet according to the classification~~~~ The special refractories can be divided into five categories: 1. metal ceramic
Q:The fire prevention board line is made of what material?
(1) if it's real wood floor, the line should be made of wood. The ready-made wooden line, walnuts, price range depends on the texture width. The common width is 100 mm. One linear meter is around $17 - $30. Paulownia is cheaper with one linear meter more than 10 yuan. When it is composite wood floor, high-density plate modelling line can be used. The price is commonly between 40 to 80 yuan (2400 x 1200 mm), which depends on the thickness and density and also the factory. There are also imitated wooden aluminium line. (3) if it's the marble ground, you would better use marble line, which is 200 yuan one square meter. It's price is also unequal. The imitated stone is also available. There are a lot of kicking decoration materials and it depends on how you use it. That is to say crural line should be coordinate with the ground. It means that it sjould not only to be beautiful but also to be practical. It would be better if it is relatively cheap as well.
Q:What kind of materials can be tested their electrical resistivity in the current refractory industry?
Graphite, Magnesium Oxide, and alumina are all feasible.
Q:What are the advantages and disadvantages of new external wall fireproof and thermal inuslation matertials?
STP has a certain chance to self-destruct. After the sealing layer is damaged, the property will be bothered. When filling the foam glass, burst foam cement and low-strength glass fiber, the structural requirements are very high with big spraying limitations. As everyone knows that rock wool absorb organic matters, and the government do not allow us to use self-insulation, so it is not the mainstream with too low adoption rates. In fact the owners shouldn't worry about this problem. Since the developers have installed it for you, it is useless to worry about it. The other is that for those who want the original balcony closed up, if you want to shovel the original balcony wall insulation, you must pay attention to ask the construction team before you start. Because it is common that the cold bridges formed thereby will cause water seepage and moisture condensation in the balcony.
Q:What is refractory brick?
Capability1. Refractory brick is also known as firebrick. It is faint yellow or brownish. Refractory brick with 770 ℃ at high temperatures is called for short firebrick. It is mainly used for building and smelting furnace. It is a refractory material made by fring refractory clay or other refractory material.
Q:Which industry does the metallurgy and thermal insulating and refractory material belong to?
It belongs to the refractory industry, which has its own trade association.
Q:How long is the fire endurance of Grade A fire resisting shutter
The fire endurance of Grade A fire resisting shutter is not lower than 1.20h. Use fire resisting shutter as fire compartment separation in places where it is difficult to set firewall. When fire resisting shutter whose unexposed surface temperature rise is used as judging condition of fire endurance is used, its fire endurance should not be lower than 3h. When fire resisting shutter whose unexposed surface temperature rise is used as judging condition of fire endurance is not used, individual protection of  closed automatic water spray system shoule be set at two sides of the shutters and duration of water spray system should not be less than 3.0h.
Q:Is aluminium oxide refractory material?
Yes. It has high melting and boiling point, stable chemical property. All refractory material almost contains aluminium oxide. Refractory materials have a large range and need specific requirements. Refractory material is divided into sizing refractory material, shapeless refractory material, ceramic fiber, refractory bricks and castable refractory. It can be subdivided according to temperature rating. Hope it is helpful to you.

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