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:I want to know what is the slim in the refractory bricks
Where are you from, I can introduce to you
Q:What dose the fireproof and thermal insulation material include?
It includes A1: Non-combustible inorganic monomer; A2 Non-flammable organic compound, namely composite material; A3 Modified phenolic fireproof materials.
Q:What do refractory materials include?
It is so difficult.
Q:What are included in wall fireproofing material?
External wall thermal insulation materials are divided into A and B according to combustion level. Grade A is incombustible material, while grade B is combustible material. A few years ago, fires in CCTV building and Shenyang hotel resulted from grade B material. Currently grade A is usually used, and some are even cheaper than the grade B material. Grade A is roughly divided into insulation mortar, phenolic board, rock wool board, foam cement board, etc. Insulation mortar is quite good. It is easy and convenient to construct, has low cost, but the production is too simple and it is easy to fake.
Q:What kinds of refractory will be used in kiln of sintering ceramics?
Porcelain has many classes, including acid, alkaline and neutral materials.
Q:What is refractory material?
Q:I would like to ask a friend that how much is the fire endurance of level A fireproofing glass?
the fire endurance of fire window is: class A window is not less than 1.2 hours, class B window is not less than 0.9 hours, Class C window is not less than 0.6 hour. technical requirements: 1, materials and accessories (1) the window frame is made by a certain strength of steel frame or wooden frame which is sufficient to safeguard the integrity and stability. (2) steel frame and mound layer can select galvanized steel sheet or stainless steel plate. Its selection standards should be in line with the provisions of Article 5.1. in GB12955 "Steel Fireproof Door General Technical Condition" (3) the selection standards of wood frame and mound layer should be consistent with the provisions of Article 5.1.1. in GB14101 "General Technical Conditions of Wooden Fireproof Door" (4 ) the inner filling material of steel and wood frame should be non-combustible material. (5) fireproofing glass can choose the qualified products in fire resistance test and not affecting the fire windows. light transmittance of glass is not less than 75% of identical layers of ordinary plate glass. ( 6) a sealing material between the frame and the fireproofing glass should use the nonflammable material, it can play the role of fireproofing and smoke insulation in the fire disaster. I hope I can help you
Q:How to choose thermal insulation materials for flood heating?
1, Select the appropriate floor material suitable for radiant floor heating. The floor radiant heating system mainly transfer heat through the ground concrete and the ground material to the room. Therefore in the heating season the ground material will always be heated during heating season. Therefore, it is better to choose stone materials and compround floor plate insensitive to tenmperature change with good heat dissipation and functions. Currently, wood floor is not suitable for the ground radiant heating system. 2, choose the pipe with anti permeability performance. Plastic floor heating pipe itself has a certain air permeability, if oxygen penetrates in it is prone to oxygen erosion and system's mental device will be eroded, resulting in the risk of leakage. Therefore in order to ensure the reliable operation of the heating system, the selected pipe must have anti oxygen permeation performance, and meet the standard stipulated by the DIN4726 oxygen permeation quantity: and be less than 0.1mg\L.d at 40 C.
Q:Introduction to refractory material
Refractory material refers to inorganic non-metallic materials with refractoriness of no less than 1580℃. Refractoriness refers to the centigrade temperature of refractory cone sample in the case of no load when resisting high temperature without softening. But the refractoriness alone cannot descript the refractory material, thus 1580℃ is not absolute. Now refractory material is defined as material used in high temperature allowed by its chemical properties. Refractory material is widely used in metallurgy, chemical industry, petroleum, machinery manufacturing, silicate and power industrial area, of which the application in metallurgy accounts for the largest part of 50% ~ 60% of total output.
Q:What is the magnesium carbon refractory?
The composition of refractory brick There are many types of raw materials of refractory brick, mainly divided into six categories: Soil, stone, sand, mineral, power and others. The first kind of raw material, soil: Aluminum soil, kaolin, clay, diatomaceous earth The second kind of raw material, Stone: Fluorite, kyanite, andalusite, forsterite, vermiculite, mullite, pyrophyllite, chlorite, dolomite, sillimanite, magnesia-alumina spinel, silica The third kind of raw material, sand: Pottery, zircon sand, quartz sand, magnesite The fourth kind of raw material, ore: Chrome ore The fifth kind of raw material, powder: Aluminum powder, silica powder, silicon powder The sixth kind of raw material of refractory brick, others: Asphalt, graphite, phenolic resins, perlite, cenosphere, sialon, corundum, silicon sulfate, silicon carbide, sodium silicate, silica solution, boron carbide, calcium aluminate cement, nitride material, shale ceramisite, alumina, alumina sol and zirconia, etc.

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