HIgh Purity Magnesia Castables

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Specifications

color:light grey
Shape: powder or fine powder
Composition:SiO2 Al2O3
CaO TiO2 Fe2O3
widely used in petroleum chemical smelt

color:light grey
Shape: powder or fine powder
Composition:SiO2 Al2O3
CaO TiO2 Fe2O3
widely used in petroleum chemical smelt

High Alumina Refractory Castable  is mixed by corundum, high quality bauxite clinker,silicon carbide as aggregate,all kinds of powder,ultra-fine powder,micropowder,á-alumina powder and admixture with mixture rations according to differernt varieties.Its main characters are below:

    1 High strengh in normal and medium temperature.

    2 Good wear resistance and erosion resistance.

    3 Good thermal shock stability.

Main Physical and Chemical Characteristics

Items

Index

NO.

SHF-200

HF-160

HF-135

HF-130

Chemcial composition(%)

Al2O3

>80

>75

>65

>60

SiO2

<15

<19

<28

<34

Bulk Density(g/cm3)

110°C×24h

3.0

2.8

2.5

2.4

1000°C×3h

2.9

2.8

2.5

2.4

Modulus of Rupture(Mpa)

110°C×24h

12

10

8.5

7.0

1000°C×3h

18

15

13

11

Cold Crushing Strength(Mpa)

110°C×24h

120

90

68

50

1000°C×3h

180

120

95

80

Liner change after buring

1000°C×3h

±0.2

±0.2

±0.3

±0.3

Wear resistance(AMTMc-704)

3.0

5.0

7.0

9.0

Heat Conductivity (W/m.k)

1.6

1.5

1.5

1.5

Thermal shock resistance(times)(1000°C water cooling)

35

30

25

20

Refractoriness °C

1790

1790

1750

1730

Max Working Temperature

1550

1500

1400

1350



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Q:how does the fire endurance of first rate fire resistant window?
how does the fire endurance of first rate fire resistant window? I really don't know it and I need a specific direct and detailed answer!
Q:What are the raw materials of refractory concrete ?
Q:What are the commonly used admixture for alumina-magnesia refractory? What are the impacts on its performance?
2, form Mg-SiO2 coagulation and combination, CA cement bond? Bricks can generally be made by combing with phenolic resin, castable use 1, combined with silicon powder; 3, can also combined with brine MgCl is binding agent
Q:Using what kind of melting aluminium furnace refractories is more appropriate?
If it's the ordinary, you can use high aluminum refractory brick with general clay, GB/T 3994-2005 clay heat insulation refractory brick. If you need these with good material, there is high alumina thermal insulation refractory brick, GB/T 3995-2006 high aluminum heat insulation refractory brick, models have A13 and material is the alumina, A13 50 u, high insulating brick B5.Intermediate insulating brick B2, etc. Dolomite brick: good hang kiln performance, good erosion resistance, but brick is usually without f - CaO, hydration, and difficult to transport and storage, less used in the production. Magnesia-chrome bricks: good hang kiln, used in calcining zone. The disadvantage is that its thermal shock resistance is poor and plus hexavalent Cr is toxic, the production and use of magnesite chrome bricks in international countries gradually reduce. Now unit using the brick find replacements as soon as possible.
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:Does the aluminum silicate fiber can be used outdoors? If not, what other refractories can be used outdoors?
Q:Which kind of refractory does insulation board belong to ?
Q:What are the raw materials of refractory?
Of course, different types have different raw materials: Magnesite (the electric smelting: alkaline refractory, magnesia-carbon bricks, alkaline, high-purity) + crystalline flake graphite + phenolic resin + additive (silicon powder, aluminite powder, silicon carbide powder, or high-temperature asphalt,etc.) , acidic refractory: The neutral is not easy to answer. such as. You can check out the classification, such as
Q:what is the original materials of fireproof coating?
Fire retardant coating is composed of the base materials (that is film forming substance), pigments, ordinary coating additives, fire retardant agent and dispersion medium. In addition to fire retardant agent, other components functions the same as in ordinary coating, but its performance and thickness are specifically required. Some solvent-based fire retardant coating can burn upon encountering fire before construction.In fact,It is the flammable solvent contained in the coating that is burning while substances such as the base materials and fire retardant agent does not burn. Because solvent-based fireproof coating contains organic solvent and these fire-resistant coating, once leaked from the bucket, are likely to cause a fire. Fireproof coating on the substrate can insulate heat only after the solvent contained evaporates compeletly.
Q:How is the division of the fire resistant level of the rock wool board?
The fire rating of European style rock wool board is level A , which uses Da Guang Beijing Jinyu rock wool board, with the main advantages are: 1, High acidity coefficient: The high coefficient of acidity greatly improves the life resistance and weather resistance of the rock wool board. 2, Hydrophobic air permeability: According to the picture, Jinyu Star rock wool is water-repellent, at the same time it also has breathability, so the liquid water is not easy to dip into the rock wool, and the water vapor and other gas molecules could pass through the rock wool. In particular, the insulation materials have this feature which enables the building to have "respiratory function" thus making the room more comfortable and preventing anti-mildew phenomenon happening indoor. 3, Environmental protection: The goldfish can survive freely, which just shows it is environmental; 4, High strength: The advanced pleating and curing technology make the rock wool board tensile and high compressive strength. It not only can be applied on the external wall thermal insulation and sandwich board core material, but also can be used to make structural cotton in the flexible waterproof roofing. Its quality is so stable that it is convenient in construction and durable in use. 5, Fireproofing: Not just talking about the fire rating, but the fireproofing time, which is generally up to two hours, and can be used for lining thermal insulation fire-resistant part of the glass curtain wall, through-wall pipe seal, pier between two windows, window sill wall and other parts; 6, Derived advantages: Agriculture applies the soilless cultivation cotton;

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