Raw Materials for Refractory:High-Quality Tabular Alumina - Good Price, Delivery Time
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 1000 m.t./month
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Specifications:
white tabular alumina
1.Al2O3>99.2%
2.Past ISO9001-2008
Description:Tabular Alumina is a pure sintered α-alumina materials that has been fully densified by rapid-sintering without the use of sintering aids at temperature in excess 1900°C.
Tabular Alumina has characteristic large, well developed hexagonal tablet shapedα-alumina crystals of up to 200µm length. applications include its use in electrical insulators, kiln furniture and as a catalyst support.
High refractoriness
Excellent thermomechanical properties
High volume stability
High density, low permeability
High thermal shock resistance
High chemical resistance
High purity
High mechanical stability
High wear-resistance
Series
Sizes, mm (mesh)
Benefit
Coarses
0-0.5mm
0-1mm ,
0-3mm0.2-0.6mm
0.5-1mm
1-2mm
1-3mm
2-5mm
3-6mm
Adds thermal shock and corrosion resistance to refractory products
Fines
0-325
Optimizes the particle size distribution and refractoriness of the refractory matrix
If you’ve kind enquiries, please don’t hesitate to let us know. ^_^
- Q: what is best for making refractory insulation for Blast furnace, hot stove.
- clay brick, insulating brick can endure relatively high temperature and last longer than the general fireproof fiber.
- Q: The primary problem, does the gas permeable brick is fired refractory bricks(refractory) ?
- Yes. After moulding by casting in the firing of 1450 ° degrees.
- Q: How to distinguish between class A fire resistant door and class B fire resistant door from appearance ? What are the differences between the two refractories? Thank you !
- First, the materials are the same. But the thickness of grade A and grade B fire doors is different juding from their appearances. Grade A :50. Grade B:45. Added question: Do you refer to steel fire door?
- Q: The difference between refractory and thermal insulation material
- In simple terms, refractoriness is different. The refractoriness of refractory is high while that of insulation material is low.
- Q: Is the linear change on reheating the same as heating permanent linear change of refractory material?
- “+”represents expansion. the afterexpansion and aftercontraction after cooled to be at room temperature. The change may significantly damage the masonry of thermal kiln. There are regulations on the linear change on reheating of common refractory material in the national standard. Some physical chemical changes may continue. It is defined as the change from being heated to the specified temperature of refractory material sample. Heat preserving for a while till afte cooling to be at room temperature, then the residual will expand or contract in its length, heat preservation for a while, organization vitrification, the irreversible changes of its length refers to heating the firing refractory to be at high temperature, so as to make the volume of refractory materials expand or contract, due to the influence of uneven temperature or lack of time, otherwise it will cause the deformation of the refractory ball and make this indicator within standard even reach smaller value, so firing control must be strengthened in product production. But it is should not be too high. For refractory materials with same chemical composition, the linear change on reheating is produced in the heating process. Properly increasing sintering temperature and prolonging the holding time is an effective process measures, make its firing inadequate. When subjected to high temperature, it can reduce the thermal shock resistance. Minus sign "-" represents contraction. The permanent line rate refers to heating the fire refractory ball to the specified temperature. Linear change on reheating, also known as residual linear change, is an important indicator to assess the quality of refractory in the long time use. To control the permanent line rate within the standard or reach the minimum value.
- Q: Is the refractory reached British BS standard and used for cables in China at present ceramic silicone rubber?
- Which standard? Please be more specific
- Q: What are the best refractory materials in 2,400 Celsius degree?
- You can try zircon sand which has a melting point of 2430.
- Q: What's the fire resistance test method of doors and roller shutters?
- Fire resistance test method of doors and roller shutters: This standard specifies the fire resistance test method for roller shutter doors under standard fire conditions. The method is used to test the fire resistance of the ventilating duct when bearing the external fire (A duct) and internal fire (B duct). Fire resistance test of vertical ducts may be conducted referring to this standard. 1.Test specimen1.1 The test specimen is obtained by cutting from any part of the qualified metal tube unless otherwise relevant standard or mutual agreement specifies the cutting position of the metal tube. 1.2 Length of the specimen: L≈2.5D+50mm (D: outer diameter of the metal tube). The cut surface of the specimen must be perpendicular to the axis of the metal , and the seamed edge of the cut should be round off. Test method GB243-82 of metal tube necking 2. Test procedures 2.1 In the test, punch or press the metal tube into the tapered conical seat (see Figure) with a hammer or press machine, and make it uniformly diminished to the regulated shrinkage X which is calculated according to the following formula: Test method GB243-822 for metallic pipe necking: The inner wall of the seat cover used in the test should be polished, and has certain hardness and is coated with lubricating oil. Its conicity is 1:10, 1:5 or others in accordance with relevant standard provisions. If there is no provision, then adopt the conicity of 1:10. This standard is not suitable for: a) The pipeline whose fire resistance depends on the fire resistance of the ceiling; b) The pipeline with access door, unless otherwise the access door is included into the pipeline and tested together; c) The pipeline with two or three sides; d) Fume exhaust pipes;
- Q: Who can tell me the properties and classification of insulating refractories?
- It is the chemical method. The chemical reaction in the brick making process to produce gas and method for obtaining a porous brick. Usually use chemical reactions such as carbonate and acid, metal powder with acid, caustic and aluminum. Chemical reactions can be used must be relatively slow and can control or mechanical disturbance will disappear bubble in an injection mold. If the reaction is too fast, adding inhibitors such as hydrogen peroxide and manganese dioxide. The fine powder material slurry mixed with reactant bubbles to obtain stable foam slurry injection model, after drying the firing. This method of making pure oxide insulating refractory products, its porosity can reach 55% ~ 75%.
- Q: Which basic refractory is better?
- 1 Zibo Quanxing Refractories Plant, factory direct, quality assurance, best price, off the shelf. 2 Zibo Huadian Refractories Co.,Ltd. one package service from research, production, sale to construction, our trust!
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Raw Materials for Refractory:High-Quality Tabular Alumina - Good Price, Delivery Time
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 30 m.t.
- Supply Capability:
- 1000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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