white fused alumina for refractory 99.2% NA2O 0.3%

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Packaging & Delivery

Packaging Detail:25kg bag or ton bag or as your requirement.
Delivery Detail:within 20 days delivery after receipt of advance payment.

Specifications

99% high purity abrasive White fused alumina for refractory
1.White fused alumina99%
2.Refractory: 0-1mm, 1-3mm, 3-5mm, 5-8mm

Products discription

1.Introduction

The main raw material of white fused alumina is high grade processed alumina, which is fused with the carbon material and scrap iron in the electic furnace under the high temperature of above 2200°C.The product is characterized by low expansion coefficient, high refractoriness, good thermal and chemical stability.

2. Grain size commonly used

  • Refractory: 0-1mm, 1-3mm, 3-5mm, 5-8mm ,200#-0, 325#-0.

  • Abrasives: F24-F60.

  • Sandblasting abrasive:F10-F240.

  • Precision casting: F80-100, F100-F120.

  • Ceramic & electronic polishing:F240-800.

    3.Physical properties of White Fused Alumina

Item

Color

Color System

Mohs Hardness

Melting Temperature(°C)

Refractory Temperature(°C)

True Density( g/cm3)

Magnetic Material

Specification

white

trigonal system

min10

2250°C

1900°C

min3.50

max0.003%

4.Chemical index of White Fused Alumina

Purpose

Specification

Chemical composition(%)

Magnetic material content(%)

Al2O3

Na2O

SIO2

CaO

For abrasive

F

12#—80#

min99

max0.6


max0.4

max0.003

90#—150#

min98.5

max0.003

180#—240#

min98.2

max0.7


max0.4

max0.002

For refractory

Size sand

0—1mm

min99

max0.5


max0.4

max0.003

1—3mm

3—5mm

5—8mm

Fine powder

200#—0

min98.5

max0.5


max0.5

max0.003

325#—0

WE CAN ALSO DO NA2O:0.3% MAX IF CLIENT SPECIAL NEED.

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Q:How to use fire-resistant soil?
In fact, the refractory soil is not strong. Refractory soil is clinker, there is no strength, also known as "blade mud", he is used as filling materials, the use of thickness generally not more than 3mm. Therefore, the furnace insulation can not be done.Civil boiler interior insulation, you can use "high aluminum cement", also known as refractory cement on it.
Q:Does the external wall thermal insulation materials level b1 need the fire barrier zone?
Residential buildings should meet the following requirements: 1, The height of building is greater than or equal to 100m, the combustion performance of thermal insulation material should be level A. 2, The height of building is greater than or equal to 60m but less than 100m, the combustion performance of thermal insulation material should not be less than the level B2. When using the level B2 thermal insulation material, each layer should set a horizontal fire barrier zone. 3,The height of building is be equal or greater than 24m but less than 60m, the combustion performance of thermal insulation material should not be less than the level B2. When using level B2 thermal insulation material, each two-layer should set a horizontal fire barrier zone. 4, The height of building is less than 24m, the combustion performance of thermal insulation material should not be less than the level B2. Besides, when using level B2 thermal insulation material, each three-layer should set a horizontal fire barrier zone. According to this understanding, it can not be set.
Q:what kind of fireproof materials is used for high rise buildings?
First, fire resistance steel door: in the general real estate, developer uses more of fire resistance steel door. The mid-low-end doors are the earliest products and mostly widely used with longer servce time. The disadvantages are corrosions, thus it will rust, fade after being used for a while, and will affect the overall appearance. Styling lines are hard, not matching well with modern home decorative styles. Second, the stainless steel fire doors: anti-theft performance ,durable, stronger security. Compared to the general iron or mixed iron and steel security doors, stainless steel doors never rust and most importantly its uniqueness in addition to lasting bright color. Disadvantages: Stainless steel security doors are mostly silver, giving us dull feelings by seeing its appearance and color, lack of coordination. Third, glass fire door: high quality fire glass doors. recent years have seen wide application in office buildings and some high end public place, less in individual users. Compared to the current categories of timber, fire glass door is not only simple and luxury and durable.
Q:Does anyone know the fire endurance of steel stud partition?
Indeed ① Dragon Brand gypsum board fire-resistant partition: Its fireproofing extreme time is 4 hours, suitable for firewalls of a variety of public buildings, public exit passageway and other partitions, which meets the first level of fire protection standard ② fireproofing and pressure-resistant partition: Refers to the partition which can withstand momentary gas shocks of over 1200pa , mianly used for the room partition with inert gas fire-fighting needs, such as equipment rooms. The pressure-resistant degree of fireproofing and pressure-resistant partition of Beixin Building Materials can be up to 4800Pa, especially suitable for high-rise fireproofing.
Q:Are the rubber insulation materials are refractory materials?
Bushi
Q:Is there vermiculite in refractory?
Paint, small thermal conductivity, chemical, shipbuilding and other industries. Expanded vermiculite has excellent electrical insulating property, and it is stratified structure. It is a good thermal insulation material used in growing seedings, flowers and trees, bulidings, rubber and smelting. I hope my answer will make you satisfied. Refractory contains crystal water and board between its layers. For example, the interlayer of fireproof door contains expanded vermiculite, and after expansion, its specific gravity is 60-180kg& # 47. Electric insulation material. Expanded vermiculite is widely used for thermal insulation material and sealing material. Of course, some refractory also uses vermiculite; fireproofing material. Vermiculite is a good refractory material, whose maximum using temperature and unit weight can be repsectively up to 1,100 ℃ and 50-200kg/m3. When it is expanded, it is called expanded vermiculite. It is highly thermal insulated. Hard water softeners and paint. After unripe flake vermiculite is roasted in high temperature, its volume will expand 6- 20 times quickly. Friction materials, its volume can be quickly expanded several times to dozens of times. In addition. Quality expanded vermiculite
Q:What is the function of refractory material?
Refractory is a basic material in the field of high temperature technology. Generally, the refractory is used as structural material or lining to resist high temperature in various thermal equipment and high temperature container. In the iron and steel industry and metallurgy industry, coke ovens are mainly composed of refractory materials. Various refractories that meet the requirements are essential in blast furnace for ironmaking, hot stove, all kinds of steel-making furnaces, soaking furnace and heating furnace. Not only the die casting for molten steel needs lots of refractory materials, but also the continuous casting needs some high-quality refractory materials. Without high-quality refractory materials, external refining is also not impossible to achieve. Statistics show that the steel industry is the sector that needs the most refractory. Pyrometallurgy and thermal processing of ferrous metal also needs refractories. All high-temperature furnaces or lining in construction materials industry or other high temperature industries that produce silicate products such as glass industry, cement industry, and ceramics industry must be constructed with refractory materials. All kinds of roasting funaces, sintering funaces, heating furnaces, boilers, flues, chimneys and protective layers in chemical, power and machinery manufacturing industry need refractories. In short, when some kind of structures, devices, equipments or vessels are used under high temperature, they all should utilize refractory to resist the high temperature because those materials will deform, soften and fuse or will be eroded, scoured or broken due to the physical, chemical, mechanical effects, which may stop the operation, affect the production, contaminate processed objects and impact the quality of products.
Q:How many types of fire-resistant material?
1. Acid fire-resistant material refers to one with more than 93% SiO2. It is featured by resistance to the corrosion of acidic slag ad high temperature and easy to react with alkaline molten slag. 2. Alkaline refractory material generally refers to one with magnesium oxide or magnesium oxide and calcium oxide as the main component. It has high refractoriness and strong resistance to basic slag. 3. Silicate aluminum refractory material refers to one with SiO2, Al2O3 as the main component. According to the content of Al2O, it can be divided into three categories: half siliceous (15-30% Al2O3), clay (Al2O3 30 ~ 48%), high aluminum (more than 48% of Al2O3). 4. Fused cast refractory material refers to shaped refractory products made by high temperature melting and casting.
Q:Who knows the fire resistant level of the rock wool color plate?
Hello; Same with other unprotected steel, the fire endurance of the color steel plate is generally 15 minutes. It is not a fireproofing material, let alone fire resistant level. If the color steel plate has sprayed fire retardant coating and the thermal insulation filling material in the core is rock wool fiber, it can achieve A level fireproofing requirements. The color steel plate refers to the painted steel plate, which is a steel plate with organic coating. The color steel board is divided into the single plate, color steel composite board, floor support board, ect. It is widely used in large public buildings, public plants, portable dwelling, and integrated housing walls and roofings. I hope that will help you.
Q:What is the acceptance standard of refractory?
Feeler gauge is used to check the thickness of the refractory brickwork joint. The top of the gauge can not be sharpened. Feeler gauge is of the width of 15mm, length of 100mm and thickness of 1, 1.5, 2 or 3mm. The thickness is eligible when the depth which the feeler gauge is inserted in is less than or equal to 20mm. Ten places should be inspected per 5m2 of masonry surfaces. It is qualified when the condition in which thickness of the brickwork joint is 50% larger than a predetermined depth is not less than five times and it is excellent when the condition is no more than two times.

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