$Raw Materials for High Temperature Refractory Cylindrical Alumina Smelting Crucible System 1$

$Raw Materials for High Temperature Refractory Cylindrical Alumina Smelting Crucible$

$Raw Materials for High Temperature Refractory Cylindrical Alumina Smelting Crucible System 1$

Raw Materials for High Temperature Refractory Cylindrical Alumina Smelting Crucible

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Specifications

alumina crucible:
1.high purity Al2O3 >99%.
2.Superior refractoriness.
3.High mechanical strength.
4.Long life time

Product Description

alumina crucible:

1.high purity Al2O3 >99%.

2.Superior refractoriness.

3.High mechanical strength.

4.Long life time.

Feature of the alumina ceramic crucible:

1. High chemical etching resistance.

2. High temperature up to 1800°C

3. Resistant to sudden cold and hot, un-explosive.

4. High density of slip casting.

5. Various kinds of shape.

99.5% Alumina Ceramic crucibleIndustrial alumina ceramic crucible is used for testing laboratory and a variety of industrial analysis. Alumina ceramic crucible

include: arc alumina crucible, square alumina crucible, rectangle alumina ceramic crucible, column ceramic crucible and a

variety of shaped alumina ceramic crucible.

Physical Character of the alumina ceramic crucible:

Performance
Item		Unit	99 Al₂O₃
Physical Characteristics	Heat resistance	⁰C	1800
	Bulk density	g/cm³	3.9
	Water absorption	%	0
	Flexural strength	Mpa	360
Mechanical Characteristics	Hardness vickers	Gpa	15.6
	Elastic modulus	Gpa	370
	Poisson’s ratio	-	0.23
Thermal Characteristics	Linear expansion coefficient	(20⁰C-500⁰C) 10^-6/⁰C	8
	Thermal conductivity	w/(m.k)	32
	Specific Heat	10^-3J/(kgK)	0.9
Electrical Characteristics	Dielectric constant (1MHZ)	-	9.9
	Dielectric loss angle	*10^-4	1
	Dielectric strength	*10⁶V/m	15

Packaging & Shipping

Packaging of alumina crucible: PE bag inside outer carton

(930*630*230mm),finally make the wooden pallet(950*950mm 950*1000mm) or according to your requirement

Shipping of alumina crucible : delivery within 15 days after confirm the order.

FACTORY:

$High Temperature Refractory Cylindrical Alumina Smelting Crucible$

Q: what's the standard of fireproofing material?: Class A1 is divided according to the combustion performance of GB8624-2006 building materials and products. Specific technical index requirements are: 1, the temperature rise ≤30 degrees;mass loss rate ≤50%; combustion duration time is 0; 2, main components, overall products, gross calorific value of external secondary components ≤2.0MJ/kg; any inner secondary component ≤1.4MJ/kg; (there are difference between homogeneous and non-homogeneous). Z802 building materials noninflammability testing furnace has to be used for testing technical indicators mentioned in test 1, using Z805 building materials combustion heat value to test technical indicators mentioned in test device 2.

Q: What is the role of adding chromium oxide green in unshaped refractory materials: Generally, less is added in corundum or corundum spinel refractory material, but it can significantly improve the material performance such as high temperature strength, erosion resistance, thermal and shock stability, etc.

Q: Procedures for producing common refractory materials?: The general procedures of producing refractory materials include calcination of raw materials, selection of raw material , crushing, grinding, screening, mixing, ageing mixture, molding, drying, burning and etc. At present, the refractory factory usually purchases the calcined clinker, so the calcination of raw material is no longer a consideration of common refractory plants.

Q: What the fireproofing materialare of the refractory kettle and where they can be sold?: Many places sell these. Nearly 10 years, can't brun when it is dry, adsorption. You can also baidu these materials. Heat transfer evenly, feldspar, clay and other raw materials with a ceramic products. Traditional casserole can not resist heat difference and also can withstand for 100 high temperature without crack. Aiming at the problem of traditional casserole, easy to crack and air permeability, people joined the spodumene on raw material, produce a high-temperature resistance casserole. It is produced after the high temperature burning makes an earthenware pot to keep the original advantages. Hebei has many places to sell these materials and is also relatively cheaper. The traditional casserole has features of not easy to transfer heat's quartz and slow cooling. Due to production technology and raw materials, it greatly improves the casserole' practicability after research and improvement.

Q: How long is the duration of fire resistance that fireproof window of level B can endure?: The duration of fire resistance: fireproof window of level A shall not be less than 1.5h, while level B shall not be less than 1.0h. The frame of both fire proof windows A and B are made of steel, and the glass, not less than 26mm, is composite insulation fireproof glass. Monolithic fireproof glass window is neither B fire proof window nor A fire proof window, but non insulated fire proof window.

Q: The following statement is correct: artificial corundum has a high melting point and can be used as a high grade refractory material. The main component is silica dioxide: It's D,1. artificial corundum is mainly composed of three aluminium oxide two4, color glasses are not added cuprous oxide, silver halide is added

Q: What are the commonly used fire protection materials: Firewall. The fire wall is made of non combustible material, and is directly installed on the base of the building or the reinforced concrete frame or fire proof walls . Fireproof limit of the firewall, according to the current "building regulations", is 4 hours, wheras the specification of Technical specification for concrete structures of tall building is 3 hours. doors resistant to fire, heat in a certain period of time These door usually prevent the spread of fire and gas in the fire resistant wall, staircase, pipe well. Fire door can be divided into steel fire doors, wood fire doors and composite materials fire door according to the material used. According to the limit of fire resistance can be divided into the class A fire door (1.2h), B fire doors (0.9), class C fire door (0.6h); (3) fire window. Windows resistant to fire, heat in a certain period of time It is usually installed in the fire resistance wall or doors; the fire shutter. This roller shutter can be refractory in a certain period of time. It is typically used for heat and fire insulation in escalator with difficulties to install fire resistant wall, fire resistant valve and smoke resistant valve. Fire resistant valve is installed in the ventilation and air conditioning system of air supply and return air duct, usually in the open state, fire, It will be turn off when the pipeline gas temperature reached 70 degrees, can meet the requirement for fire resistance and insulation for gas and fire. Smoke fire resistant damper installed in the exhaust system pipe, when the pipeline gas temperature reached 280 degrees, it will close automatically, insulating fire and gas.

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.

Q: Who knows how many poured refactory material are there?: Pouring refractory material can be classified into the followings according to the body density: Heavy (> 2.0g\cm3), medium heavy (1.0-2.0g\cm3), light (0.4-1.0g\cm3); by binding agent: Combination of hydration, chemical binding, condensation, hydration and condensation: Clay, high alumina, silica, magnesia, alumina magnesia, magnesium and chromium, magnesium zirconium, silicon carbide etc.. Clay brick, high alumina brick, bead brick, silica brick, light mullite, alumina hollow spherical brick, oxidation zirconium hollow spherical brick, corundum brick, magnesia brick, magnesia brick, magnesia alumina spinel brick, magnesia chrome brick and so on

Q: What are the additives and recipes of refractory?: Water reducing agent is to evidently reduce mixing water content while keep the slamp value of refractory castable almost invariant, also known as fluid loss agent. Water reducing agent itself cannot have chemical reaction with material component or compose new chemical compound, but it just seemingly has physical and chemical reactions. The binding agent of refractory castable is calcium aluminate cement combined with clay and oxide micro powder. In commonly used water reducing agents, the inorganic includes sodium pyrophosphate (Na4P2O7), sodium tripolyphosphate (Na5P3O10), sodium hexametaphosphate [(NaPO3) 6], super sodium polyphosphate (Na2P4O11), sodium silicate (Na2O · nSiO2 · mH2O), and so on; the organic includes lignosulphonate water reducer (sodium lignosulphonate, calcium lignosulphonate); naphthalene water reducer (naphthalene sulfonate or naphthalene homologues with formaldehyde condensate): water soluble resin water reducing agent (sulfonated melamine formaldehyde resin, abbreviated as composite of melamine water reducer).

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