$Raw Materials for Refractory - Dense Fused Alumina System 1$

$Raw Materials for Refractory - Dense Fused Alumina$

$Raw Materials for Refractory - Dense Fused Alumina System 1$

Raw Materials for Refractory - Dense Fused Alumina

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Specifications

Dense fused alumina ,compact fused alumina for refractory
1, High purity:99% min
2,Excellent performace

Dense fused alumina ,compact fused alumina for refractory

Description:

Dense corundum, with a-AL2O3, as main principle crystalline phase, gray, is characterized by high melting point,high bulk density, low apparent porosity,excellent wear resistance,slag resistance, steady volume and thermal shock resistance. It is an excellent refractory material in corundum series.

Advantages:

1) we are more specialized in the procuction.

2) we can offer more competitive price

3) we can produce as per customer's requirement

Chemical and physical analysis

CHEMICAL COMPOSITION	GRIT >0.1mm	TYPICAL VALUE	FINE POWDER ≤0.11mm	TYPICAL VALUE
AL2O3%≥	99	99.2	98.6	99.0
SiO2%≤	1.0	0.4	1.0	0.45
Fe2O3%≤	0.15	0.1	0.3	0.2
TiO2%≤	0.1	0.05	0.1	0.05
CaO%≤	0.1	0.05	0.1	0.05
MgO%≤	0.1	0.05	0.1	0.05
NaO2%≤	0.1	0.05	0.1	0.08
C%≤	0.1	0.08	0.12	0.1
Apparent Porosity%≤	2.0	0.8	2	0.8
Bulk density (g/cm³)%≥	3.90	3.93	/	/
True density (g/cm³)%≥	3.96	3.99	3.96	3.98

Packaging & Shipping

25kgs/bag 1MT /bag as per customer's requirement.

Our Services

1.We will keep the client informed about the cargo situation,from production time to the shipment.

2.We test samples picked up from the plant or loading port in our designated third party sample before every shipment to make sure each lot quality is good for our client.

3. we are reliable, Hope that friendly cooperation.

FACTORY:

$Dense Fused Alumina For Refractory$

Q: which kind of material is chosen for fireproofing window?: (1) the inside filler material of steel, wood frame should use incombustible material. (2) window frame uses steel frame or wooden frame with certain strength that can safeguard the integrity and stability of the components. (3) steel frame and mound layer can choose galvanized?steel?sheet or stainless steel plate. Its selection criteria conform to the article 5.1 in GB12955 Steel Fireproof Door General Technical Condition. (4) the selection criteria of wooden frame and mound layer should conform to the article 5.1 in GB12955 Wooden Fireproof Door General Technical Condition. (5) fire-resistant glass can choose test approved products without affecting the fire resistance of fireproofing windows . Light transmittance of glass should not be less than 75% of same layers commom sheet glass. (6) the sealing material between the frame and the fire-resistant glass should use flame retardant materials, it can play a role of fireproofing and smoke insulation in the fire. (7) hardware accessories should be tested qualified approved supporting product.

Q: Can anyone tell me what material the first rate fire resistant door is?: Class A fire door materials are mainly steel, wood, steel and wood,and other materials. If there is filling material in a Class A fire door, it is generally the perlite. According to the actual situation in China, the fire doors and windows are divided into class A, class B, class C, whose minimum fire endurances are stipulated, namely class A 1.50h, class B 1.00h, Class C 0.50h. There are fireproof wooden doors and fireproof steel doors. whose main purpose is to achieve fire endurance time. But door closers are required to be installed.

Q: What is the importance of silicon powder in refractory processing?: it depends on the type of refractory material, in addition to lS friends talked about, in the amorphous mobility&#92 strength should also have an impact

Q: Who can introduce the difference between galvanized fireproof?coatings and steel structure fireproof materials?: Steel structure with heat galvanization has a process requirement, which is to spray fireproof coatings. Fireproof coatings have different functions and purposes from galvanized process. When the steel surface derusted, it generally needs to brush rich-zinc primer before spraying fireproof coating. Fireproof coating plan itself includes anticorrosion plan, and fireproof coating is just a layer of coating plans, which is an intermediate layer in general. Fireproof coating plan generally includes primer, fireproof coating and finishing paint. Some fireproof coatings can be directly painted on the bare steel elements without primer and finishing paint.

Q: What is the appropiate thickness if fire resistant time for ultra thin steel structure coating is 2.5 hours?: A level fire resistant steel structure building steel column cannot be constructed with super thin steel structure fire retardant coating, because the ultra thin steel structure fire retardant limit is less than 3 hours. Thin fire retardant coating for steel structure is water borne fireproof coatings painted on the surface of steel structure. It will form carbonized fireproof heat insulation protective layer to insulate oxygen and delay the speed of heating steel structure when it catches on fire, avioding the rapid temperature rise of steel structure and increasing its fire resistant limit. Fire resistance performance: The 2mm coating ≥ 60min, 3mm 100min.

Q: What is the difference between the fire?rating and the fire resistant level of the fire-fighting equipment?: Fire rating and fire-fighting rating are the misnomer to the building fire resistant level. The building fire risk is measured by fire resistant level. The article 3.2.1 and 5.1.7 of "Architectural design code for fire protection" have made provision respectively on the fire resistant level of plant (the storeroom) and civil construction. Article 3.0.2 of "Code for fire protection design of tall buildings" has made provisions on the fire resistant level of tall buildings. As for the warehouse building "category malonate", it refers to one of the fire risk of goods storage, which is divided into A, B, C, D, E, and each category is refined depending on the nature of different substances. "Malonate class" specified in article 3.1.3 of "building design for fire protection" refers to the flammable solid.

Q: What types of steel are silicious quicksand and chromium quicksand used in respectively?: Chromium quicksand can be used in steel-making process that has longer refining time like LF, VD and RH, in stainless steel drainage and thin plate drainage agent. Silicious quicksand is used in short steel-making process, process that is less than 45 seconds or process without refining. You can consult Hua Heng for details or inspect it by yourself.

Q: What kind of materials are needed to make refractory bricks?: The components of the raw materials of refractory bricks. There are many types of raw materials, mainly divided into six categories: Earth, stone, sand, ore, powder and others. No.1, earth: bauxite, kaolin, clay, kieselguhr. No.2 Two: stone: fluorite, kyanite, andalusite, forsterite, vermiculite, mullite, pyrophyllite, chlorite and dolomite, sillimanite and spinel, silica. No.3: sand: ceramic sand, zircon sand, quartz sand, magnesia. No.4, ore: chrome ore. No.5, powder: Metal powder, silicon powder, metal powder. No.6, others: Asphalt and graphite, phenolic resin, perlite, cenosphere, sialon corundum silicon sulfate, silicon carbide, water glass, silica sol, boron carbide, calcium aluminate cement, nitride materials, shale ceramsite, alumina, aluminum sol, zirconia.

Q: Introduction to refractory material: The best way to learn is on-site contact. If for produing purpose, it is better to ask teh leader of a plant. If for application, go to steel mill (cement plant, glassworks, etc.) to learn and look up information. Theory alone is of no help.

Q: I wanna ask about the thermal insulation material fire resistant level?: The inorganic glass wool, rock wool and foam glass. Organic: The best is the phenolic foam, phenolic foam composite cement layer is level A.

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