White Corundum (White fused aluminum oxide)

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Product Description:

White Corundum (White fused aluminum oxide):

electrically fused in arc furnace with high grade processed alumina as raw material. It has higher hardness and slight lower toughness comparing with brown fused alumina. It is also characterized by its high purity, ability of self-sharpening, better cutting, less heat emit, higher efficiency, acid and alkali resistance, good thermal stability. As the abrasive materials, it is suitable for grinding high-speed, high carbon steel, as loose grains, it widely used for bonded and coated abrasives , polishing, precision casting and so on .




WFA Physical and Chemical Index

Chemical

Content(%)

Al2O3

99

Na2O

0.40

SiO2

0.10

Fe2o3

0.10

Physical

Cystal System

Hexahedron

Principal   Crystalline   Phase

Al2O3

Color

White

True Density(g/cm3)

3.9

Bulk Density(g/cm3)

1.75-1.95

Mohs Hardness

9

Coefficient of Linear Expansion(1/ degree centigrade )

8.3×10-4

LOI(%)

0.10




Name

Specification

Section Sand

0-1mm 1-3mm 3-5mm 5-8mm 8-10mm

Size Sand

24# 30# 36# 46# 60# 70# 80# 90# 100# 120#

Fine Powder

180-0 200-0 325-0

Chemical Composition

Al2O3

Fe2o3

SiO2

Na2O

LOI

Bulk Density(g/cm3)

Content(%)

99

0.10

0.10

0.40

0.10

3.9



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Q:Who knows how many fire heat preservation material are there?
They can be divided into wood fire, steel fire and stainless steel fire. Wooden fireproofing material is light weight, easy for installation and second decoration, as well as all types of civil construction and some industrial buildings. It can be realized through inorganic insulation materials, such as glass wool, rock wool, foam glass etc.. The phenolic foam materials inside organic foam material is more special. Phenolic foam does not only have a good thermal insulation performance, but also can be combined with steel and other materials, to achieve a class A fire retardant level. Class A thermal insulation include: 1 thermal insulation materials with class A combustion performance Fire insulation materials of fire barrier zone can use class A material with class A combustion performance in rock (ore) cotton, foam glass, inorganic thermal insulation mortar.
Q:what is the material of fixed first rate fire resistant window?
Window frames and fireproofing glass, fire sealing strip, fireproofing glass mound layer, which is infexible fan, and the flexible fans have to plus folding and closing window cleaner. (3) window frames must be integral with the building, using wood or iron to connect the wall. After the installation of the steel frame, the cement mortar must be watered between the window frame and the wall, and it should conserve more than 24 hours before normal use.
Q:Who knows the highest temperature the high-temperature refractory coating can resist?
When coating the fire-resistant coating on a steel beam of a building, paint film thickness reaching 2mm, and steel beams in the building are on fire, the fire-resistant coating can withstand for two hours. Fire-resistant coating is passive fire protection materials painted on the surface of the protected objects (eg. steel structure) , which can be divided into types of thick, thin, ultra-thin and facing according to the thickness. It can be divided into water-based and solvent-based products by medium. Whatever the structure of the building is, it will collapse if it is on fire for a long time. Fire-resistant coating function as isolation layer on the surfaces of the protected objects, delaying the building collapse time to win over valuable time for rescue and fire fighting. I hope this answer can help you.
Q:How to divide the materials according to the National Fireproofing Material Standard?
according to China's national standard GB8624-97, the combustion performance of construction materials can be divided into several classes: Class A: Incombustible building material: Almost no burning material. Class B1: nonflammable building material: nonflammable material has a good flame resistance effect. when it meet the open fire in the air or burnd at high temperature, it is difficult to spread quickly, and when the fire source is removed, the combustion stop immediately. Class B2: flammable building material: flammable material has a good flame resistance effect. when it meets open fire in the air or at high temperature, it will immediately burst into flames and easily cause fire spread, such as wooden column, timber roof truss, timber beam, and wooden stairs,ect.. Class B3: inflammable building material: No flame resisting effects, highly flammable, high fire risk.
Q:Is refractory material harmful to human body?
Chromium oxide is poisonous in alkaline environment, and the gas produced by heating of asphalt, asphalt and refractory material is poisonous............ Go to the real estate company experts, I can think of these
Q:What's the texture of refractory for the hearth of reverberatory furnace? ?
High alumina brick; you can use zircon brick under the temperature above 1700? ;may i use mullite bricks under the temperature from 1400 to 1700? you can use clay brick and heavy corundum brick under the temperature of below 1400 degrees, question closely: what's the usage temperature of reverberatory furnace? < pre accuse = "qRA" > is there someone use refractory fiber?
Q:Who knows that among refractory materials, insulation boards from which refractory material industry is superior in quality?
Using high temperature insulation material during casting process .In the molding, assembly the insulation board on the ingot head or install heat insulation cap . There are three ways to install the molded steel insulation board and install insulation board on at the head of the ingot, namely, clamping, nail fixation and mosaic technique.Compared with clay-based liner, the use of insulating board will improve high steel billet rate up to about 5% to 10%.
Q:What is the upper temperature limit for refractory materials?
The key depends on what refractories you use
Q:What antioxidant will be used in refractories?
Antioxidants (Antioxidants) is the material to prevent bad influence of oxygen. It is a kind of material that can help to capture and neutralize free radicals, the category of material to remove free radicals damage to human body. Some of the body's antioxidant is self-synthesis, others is also from the food supply. Strong antioxidant such as ASTA (short for astaxanthin), etc., generally human cannot synthesize and it must be intaked from food. (1)antioxidants in the food can protect food from oxidative damage and deterioration. (2) it has the antioxidant effect in the human body's digestive tract and prevent oxidative damage in the digestive tract. (3) after being absorped, it can play a role in other body tissues and organs. (4)It is derived from certain foods that have antioxidant effect of extract and can be used as a treatment drug. Antioxidant mechanism includs chelated metal ion, scavenging free radicals, quenching singlet oxygen and removal of oxygen and inhibit oxidase activity, etc
Q:What kinds of fireproof and fire retardant materials are there?
fireproof materials are mainly non-combustible A material and flame retardant B1materials. Class A non-combustible material: Granite, marble, terrazzo, cement products, concrete products, plasterboard, lime products, clay, glass, tiles, mosaics, steel, aluminum, copper alloy; B1 grade flame retardant materials: Ceiling materials gypsum board, gypsum fiber boards, cement particle board, mineral wool acoustic panels, glass wool decorative acoustic board, perlite decorative acoustic board, flame retardant plywood, medium density fiberboard flame, rock wool decorative panels, retardant wood, aluminum composites, flame retardant phenolic plywood, aluminum foil, glass fiber reinforced plastic composite materials; wall materials gypsum board, gypsum fiber boards, cement particle board, mineral wool board, glass wool board, perlite board, flame retardant plywood, retardant MDF, fireproof plastic decorative plates, flame-sided particleboard, colorful paint, flame retardant wallpaper, wall covering flame retardant, flame imitation granite decorative plates, magnesium oxychloride cement prefabricated wall panels, flame retardant glass fiber reinforced plastic plate, PVC plastic sheeting, high-strength lightweight composite panels, fire-retardant molded wood composite board, color retardant plywood, fiberglass and other flame retardant.

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