High Alumina Refractory Cement Supplied by CNBM

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

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Product Description:

Description of High Alumina Refractory Cement                                                                                                                            

 

Products

Calcium Aluminate Cement /High Alumina Cement CA-50

Applications

1,As binders calcium aluminates cement are used in concretes and mortars for specialised applications

 for their properties of resistance to corrosion, abrasion and heat combined

with rapid hardening and the ease of controlling grading variations.
Calcium aluminate cements are also used in combination with other fine components. Hydraulic binders

 with new properties are then obtained. In this way, aluminates act as both a complex hydraulic binder and

 a mineral reagent interacting with the other components in the mix.

2,As reagents, calcium aluminates are found in non-hydraulic systems. This is the case in metallurgical treatments

 (iron and steel industry, foundry) where specific grades of calcium aluminate are used for their low-temperature

 melting properties and for trapping molten metal impurities.

 

 

Features

1,Very low mixing-water requirement

2,Very high purity

3,High product consistency

4,High cold and sintered strength

5,Very tight specifications of setting times

 

 

product

CA50F

A600

A700

A900

CA50R

 

Chemical Compositionn   

(%)

SiO2

≤8.0

≤7.8

≤7.5

≤5.5

≤7.0

Al2O3

≥50.0

≥50.0

≥51.0

≥53.5

≥52.0

Fe2O3

≤2.5

≤2.5

≤2.5

≤2.5

≤2.5

R2O

≤0.4

≤0.4

≤0.4

≤0.4

≤0.4

S

≤0.1

≤0.1

≤0.1

≤0.1

≤0.1

Cl

≤0.1

≤0.1

≤0.1

≤0.1

≤0.1

45µm residue (%)

≤20

≤15

≤12

≤8

≤8

Blaine        (m2/kg)

≥300

≥300

≥320

≥350

≥350

InitialSetting (min)

≥30

≥45

≥60

≥90

≥30

FinalSetting  (h)

≤6

≤6

≤6

≤6

≤6

Flexural strength (MPa)

6h

——

——

——

——

≥3.0

1d

≥5.5

≥6.0

≥6.5

≥8.0

≥7.0

3d

≥6.5

≥7.0

≥7.5

≥10.0

≥8.0

Compressive strength (MPa)

6h

——

——

——

——

≥30

1d

≥40

≥45

≥55

≥72

≥60

3d

≥50

≥55

≥65

≥82

≥70

High Alumina Refractory Cement Supplied by CNBM


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Q:Which kind of external wall fire barrier zone material is better?
I recommended foam cement and particulate thermal insulation composite waterproof material, which is fire isolation area product, which uses surface of vertical plate arranged fiber technology to make the compressive strength in the vertical direction up to above 80KPa. At the same time, under the conditions of both exterior heat insulation and effects of humiture in the long-term, it can still maintain the non-aging performance of various aspects, and safety (reliability), fire resistance and excellent durability.
Q:How to solve the shell, the crack problem of refractory material in the process of forming.
Pressure mode and number of pressure control "spallation". 2, multiple pressure, pressure degree and discharge way: 1, reduce friction, choose appropriate, than big pressure disposable pressure produced by the plastic deformation, allocate reasonable grading, internal and external friction, reduce billet particles and high die wall bright. 4.--- solve the light one firstly. --moisture content being too high easily cause spallation - the compressibility of water is small and have certain elasticity, appropriately to extend the pressuring time is beneficial. The material can produce large plastic deformation under the effect of continuous load. The right amount of lubricant. - body under the condition of less pressure but long effect time molding. Mould structure is reasonable and improve billet natural stacking density. 5.3, measures to improve the unburned brick molding quality. Many times continuously pressure relief is better than one-off sudden unloading, and controlling the appropriate moisture content;- - is beneficial to air overflow.
Q:What's the fireproof specification for constrcution external wall thermal insulation materials?
incombustible material: Class A1 (homogenous): such as YT inorganic active insulation material for wall thermal, foam glass, rock(ORE) wool, glass wool, insulation board of aerogel,expanded perlite series, expaned glazed hollow bead, foam insulation boards, ETC. Class A2 (non-homogeneous composite): such as phenolic foam, gelatine powder polyphenyl granule thermal insulation material, inorganic coating materials and other nonflammable material. phenolic foam insulation board, urea resin foam and board, high flame-retardant polyurethane rigid foam and board, high flame retardant polystyrene cystosepiment, gelatine powder polyphenyl granule heat insulating slurry and other combustible materials. Requirements for combustion levels of common antiflaming EPS, common inflaming retarding XPS, common antiflaming rigid PU foam board: Class A is incombustible material (product); B1 nonflammable material (product); B2 combustible material (product); B3 combustible material (product).
Q:What is neutral refractory? Can refractory suppliers tell the main components of it?
The material using Al2O3, clay, bauxite and corundum as the main components is neutral material; the material using MgO and CaO as the main components is basic material; the material using SiO2 as th emain component is acidic material.
Q:How long can gypsum board endure fire?
Fire endurance refers to the fire-resistent limit of the whole system of light-gauge steel structure coupled with gypsum. It does nor merely refers to gypsum board. Fire endurance of the common gypsum board with the thickness of 9.5mm keeps 1.5 hours. Those gypsum board with the thickness of 12mm has a fire endurance of 3 hours.
Q:how to classify Insulating Refractory ?
General materials have test reports, where fire rating is labled.
Q:What's the refractory material in common use currently?
According to its category, raw material of basic refractory: Mainly magnesite (magnesia), dolomite, lime, olivine, serpentine, high alumina material (sometimes neutral); main neutral raw material: chromite, graphite, silicon carbide (artificial).
Q:What are the commonly used fire protection materials
Firewall. The fire wall is made of non combustible material, and is directly installed on the base of the building or the reinforced concrete frame or fire proof walls . Fireproof limit of the firewall, according to the current "building regulations", is 4 hours, wheras the specification of Technical specification for concrete structures of tall building is 3 hours. doors resistant to fire, heat in a certain period of time These door usually prevent the spread of fire and gas in the fire resistant wall, staircase, pipe well. Fire door can be divided into steel fire doors, wood fire doors and composite materials fire door according to the material used. According to the limit of fire resistance can be divided into the class A fire door (1.2h), B fire doors (0.9), class C fire door (0.6h); (3) fire window. Windows resistant to fire, heat in a certain period of time It is usually installed in the fire resistance wall or doors; the fire shutter. This roller shutter can be refractory in a certain period of time. It is typically used for heat and fire insulation in escalator with difficulties to install fire resistant wall, fire resistant valve and smoke resistant valve. Fire resistant valve is installed in the ventilation and air conditioning system of air supply and return air duct, usually in the open state, fire, It will be turn off when the pipeline gas temperature reached 70 degrees, can meet the requirement for fire resistance and insulation for gas and fire. Smoke fire resistant damper installed in the exhaust system pipe, when the pipeline gas temperature reached 280 degrees, it will close automatically, insulating fire and gas.
Q:who knows how to classify the fire resistant levels of fireproofing material?
Materials used in construction are called construction materials. The combustion performance of construction materials refers to all physic and chemical changes happened when burning or contacting fire, the properity is measured by combustibility of material surface and flame transmission, heating, smoke,charring, weightlessness, and the producing of toxicity resultant. Our national standard GB8624-97 classifies the combustion performance of construction materials into following several levels. Class A: Incombustible building material, class B1: Nonflammable building material, class B2: Combustible building materials, class B3: Inflammability construction materials, generally speaking: first fire resistant level construction is the mixed construction of reinforced concrete structure or brick wall and steel concrete structure; second fire resistant level construction is the steel structure roof truss, reinforced concrete column or mixed structure made by brick wall; third fire resistant level construction is the wood and brick made by wooden roof and brick wall; fourth fire resistant level one is the combustible structure made by wooden roof, hard-comnustible component wall.
Q:Can I use ordinary cement with the addition of sand, clay, and salt as refractory material to paste the stove?
You can add some hair, sand, yellow mud and some salt, but don’t use cement, it would lead to a thermal explosion.

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