$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 1$
$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 2$
$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 3$
$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 4$

$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory$

$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 1$

$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 2$

$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 3$

$High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory System 4$

High Quality Pure Brown Fused Alumina BFa - Raw Materials for Refractory

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t.

Supply Capability:: 3000 m.t./month

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High Quality Pure Brown Fused Alumina BFA

Specifications

calcined Brown corundum
1) High Al2O3 Content: 95%min
2) Professional manufacture
3) Hot sale overseas

Calcined Brown corundum

1) High AL2O3 content: 95%min

2) Professional manufacturer

3) Prompt delivery

Product Description

Our brown fused alumina is tilting furnace type and crushed by Barmac.

we have own power station and bauxite bases, and adopt special cooling crystallization process, greatly improved its grinding precision and efficiency, applicable to make high-grade bond abrasives.

Main feature:

1). Low expansion coefficient

2). Good Hydrophily

3). High compression strength

4). Abrasives made from it is in blue color, no reticulate crack

Chemical index:

Al2O3 95.3%-96.5%

Fe2O3<0.3%< span="">

SiO2 ≤1.0%

TiO2 >2.0%

CaO ≤0.45%

Physical index:

True Specific gravity 3.97g/cm3

Cleanliness > 97.5%

Application

1. High-grade refractory materials

2. suitable for making ceramic and resin bonded abrasive tools

3. used for grinding metals of high-tensile strength

4. Aviation

5. LED

6. Sandblasting

Pictures:

High Quality Pure Brown Fused Alumina BFA

If you’ve any enquiries, please don’t hesitate to let us know.

Q: What advantage and disadvantages it has compared to common fire insulation materials: Main advantage of A-level fire proof heat retaining plate is A-level non-conbustibility. Now residential areas strictly require the external walls to be high-level fire proof, to be specific, high fire resistance, non combustible. Standards for evaluation varies according to different types, which includes anti-corrosion, acid and alkali resistance, waterproof, anti termites and so on. Disadvantage is the insulation effect is quite ordinary. It will absorb water, get deformed, need some water prevention measures after constrcuting thermal insulating layer for it. Its thermal conductivity far below the benzene plate, and plastic extruded palte, half the thickness of the polyurethane insulation layer can reach heat perservation effectiveness of the benzene plate and extruded plate of the same thickness.

Q: A chemical problem with refractory materials: Not necessarily. What you mean is silicate

Q: Do you know what the main indicators are for the inspection of refractory materials? Thank you very much for your requests and reports: Porosity, volume density, water absorption, true density, thermal expansion, thermal conductivity and heat capacity.

Q: How long is the fire endurance of Grade A fire resisting shutter: Fire door can be divided into Grade A, Grade B and Grade C fire door according to its fire endurance. Their fire endurance is not less than 1.20h, 0.90h and 0.60h respectively. 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. When the fire resisting shutter is used for fire?compartment, fire endurance is 3h. When the fire resisting shutter is set at the opening part of firewall, fire endurance is 1.2h.

Q: What is special refractories?: Long nozzle, slidding plate, tapping hole, stopper rods, and products that steel mills use

Q: How to apply the alumina powder on refractories?: The most common one in use is the refractory bricks.

Q: What are Grade-A waterproof inorganic thermal insulation materials?: Grade-A waterproof inorganic thermal insulation materials include: 1. external wall thermal insulation materials: (1) silicate thermal insulation material (2) gelatine powder polyphenyl granule (3) steel wire gauze picking cement cystosepiment (Estazolam plate) (4) extruded sheet; 2. roofing materials: (1) XPS Extruded sheet (2) EPS cystosepiment (3) perlite and perlite bricks (4) vermiculite brick; 3. heating and air conditioning material: PUR, rubberplastic sponge, polystyrene foam, glass wool, rock wool; 4. steel structure material: polystyrene, extruded board, polyurethane board, glass wool roll mat, etc.

Q: What are fire?ratings of wall thermal insulation material?: 1.thermal insulation material with grade A combustion performance: YT inorganic active insulation material for wall thermal,rock wool, glass wool, foam glass, foamed ceramics, foam cement, hole-closed perlite, etc. 2.thermal insulation material with grade B combustion performance: Extruded polystyrene board(XPS)after special treatment/polyurethane(PU) after special treatment, phenolic aldehyde,gelatine powder polyphenyl granule, etc. 3.thermal insulation material with grade B2 combustion performance: Molding polystyrene board(EPS), extruded polystyrene board(XPS), polyurethane(PU), polyethylene(PE), etc.

Q: How do refractory materials apply into pyrophyllite?: Generally speaking, shaped refractory materials require of some powdery materials like spray grouts and iron trough in addition to pyrophyllite brick made of a mixture of pyrophyllite aggregate and powers.

Q: How to divide fire resistant level of fire door?: The classification of fire resistant level of fire door: Grade A is not less than 1.2h. Grade B is not less than 0.9h. Grade C is not less than 0.6h. It is suitable for fire door with different levels: Grade A: Equipment room (such as fire-pump room,power distribution room, generator room, smoke control fan room, etc) door, fire?compartment, door on firewall; Grade B: Eclosed staircase, front door of stair room, smoke-proof?staircase and fire elevator share lobby door, front door of fire elevator, household door which directly opens to front room or shares room; Grade C: The vertical shaft door, such as strong electric wells, weak electric wells, pipe shaft door and air conditioning facilities. I hope this information can help you.

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