High Purity Magnesia Castables - Raw Materials for Refractory

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Specifications

color:light grey
Shape: powder or fine powder
Composition:SiO2 Al2O3
CaO TiO2 Fe2O3
widely used in petroleum chemical smelt

High Alumina Refractory Castable is mixed by corundum, high quality bauxite clinker,silicon carbide as aggregate,all kinds of powder,ultra-fine powder,micropowder,á-alumina powder and admixture with mixture rations according to differernt varieties.Its main characters are below:

1 High strengh in normal and medium temperature.

2 Good wear resistance and erosion resistance.

3 Good thermal shock stability.

Main Physical and Chemical Characteristics

Items	Index	NO.
Items	Index	SHF-200	HF-160	HF-135	HF-130
Chemcial composition(%)	Al2O3	>80	>75	>65	>60
Chemcial composition(%)	SiO2	<15	<19	<28	<34
Bulk Density(g/cm³)	110°C×24h	3.0	2.8	2.5	2.4
Bulk Density(g/cm³)	1000°C×3h	2.9	2.8	2.5	2.4
Modulus of Rupture(Mpa)	110°C×24h	12	10	8.5	7.0
Modulus of Rupture(Mpa)	1000°C×3h	18	15	13	11
Cold Crushing Strength(Mpa)	110°C×24h	120	90	68	50
Cold Crushing Strength(Mpa)	1000°C×3h	180	120	95	80
Liner change after buring	1000°C×3h	±0.2	±0.2	±0.3	±0.3
Wear resistance(AMTMc-704)		3.0	5.0	7.0	9.0
Heat Conductivity (W/m.k)		1.6	1.5	1.5	1.5
Thermal shock resistance(times)(1000°C water cooling)		35	30	25	20
Refractoriness °C		1790	1790	1750	1730
Max Working Temperature		1550	1500	1400	1350

FACTORY:

HIgh Purity Magnesia Castables

Q: What are grade classifications of the external walls fireproofing material?: 1. The thermal insulation material of level A combustion performance: Rock wool, glass wool, foam glass, foamed ceramics, foam cement, hole-closed perlite, etc. 2. combustion performance is level B1 insulation materials: Extruded polystyrene board (XPS) after special treatment / Special treatment of polyurethane (PU), phenolic aldehyde and gelatine powder polyphenyl granule 3, combustion performance is level B2 insulation material: Molding polystyrene board (EPS), extruded polystyrene board (XPS), polyurethane (PU), polyethylene (PE), etc. See the 2009 edition construction technical measures 4.3.6 Level A insulation material is only for fireproofing, but its thermal insulation performance is not better than organic XPS \\ EPS and other materials.

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: How to divide fire rating of decorating materials ?: I am very happy to answer this question for you. It can be divided into Level A: noninflammability; B1: difficult-flammability; B2: combustibility; B3: inflammability. I hope my answer is helpful to you, thank you.

Q: How to choose thermal insulation materials for flood heating?: 1, Select the appropriate floor material suitable for radiant floor heating. The floor radiant heating system mainly transfer heat through the ground concrete and the ground material to the room. Therefore in the heating season the ground material will always be heated during heating season. Therefore, it is better to choose stone materials and compround floor plate insensitive to tenmperature change with good heat dissipation and functions. Currently, wood floor is not suitable for the ground radiant heating system. 2, choose the pipe with anti permeability performance. Plastic floor heating pipe itself has a certain air permeability, if oxygen penetrates in it is prone to oxygen erosion and system's mental device will be eroded, resulting in the risk of leakage. Therefore in order to ensure the reliable operation of the heating system, the selected pipe must have anti oxygen permeation performance, and meet the standard stipulated by the DIN4726 oxygen permeation quantity: and be less than 0.1mg\L.d at 40 C.

Q: Who knows what kind of material the fire-proof plate use, and is it good?: It is the decorative board made by adopting silicious material or calcareous material as the main raw material, and blending them with certain proportion of fibrous material, lightweight?aggregate, adhesive and chemical?additive before steam pressing. It is a kind of new material and more and more frequently used currently not only for it is fireproof. Construction of the fire-proof plate has higher requirements on the adhesive, and the price of the fire-proof plate with better quality is more expensive than that of the decoration panel. The thickness of the fire-proof plate is generally 0.8mm, 1mm, and 1.2mm. So it is the best material for making cupboards.

Q: Does the refractory material used in steelmaking all refer to refractory brick?: The refractory material used in steel making doesn't all refer to refractory brick, but also includes refractory castable. The foaming?agent, ladle filler sand and deoxidizer are not refractory materials but ferrous metallurgy auxiliary materials.

Q: How is the performance of refractory materials?: It is a little difficult to answer. There are some requirement for refractory materials, such as fire resistance, softness, creep, thermal shock, abrasive resistance. Besides, requirements for construction performance include: Liquidity, plasticity and other linear change rate, volume density, strength (including high temperature) and all other important indicators must be tested the same conditions with the use of test conditions and test items like body density, strength, line changes in the basic project

Q: What is the acceptance standard of refractory?: It depends on the variety of materials. In general the main test items include chemical composition, refractoriness, refractoriness under load, creep, volume density, linear change, strength, slag resistance, thermal conductivity and thermal expansion. If it is shaped products, it is required to inspect the size deviation and whether it has edge. Detection method accords with the relevant national standards and there are lots of them. You can refer to the standard compilation.

Q: What crusher is used for raw material of broken refractory material? What is the rough crushing process? What are the materials? Thank you!: What is said above ia wrong. Crusher choosed by general refractory material factory is roller type, for example: Roll crusher,teeth-roller?cracker. Choose different crushing equipment according to your requirements. You can go "Zhengzhou Keda Machinery Co., Ltd." to inspect! ! ---Hope it is helpful to you!

Q: What are the materials used in refractory material processing?: From the raw material and refractory materials can know, silicides, corundum, clay, diatomite, asbestos, metal oxides, sulfides, carbides and so can be used in the production of refractory material processing, processing of raw materials and refractory material can be used in mechanical equipment, according to production fineness crushing machine, packaging machine equipped with lifting machine, milling machine, so, the complete set of processing production line of refractory raw materials.

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