Mullite Sand For Investment Casting Grains and Powder

Mullite Sand For Investment Casting Grains and Powder System 1

Mullite Sand For Investment Casting Grains and Powder System 2

Mullite Sand For Investment Casting Grains and Powder System 3

Mullite Sand For Investment Casting Grains and Powder

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Loading Port:: China main port

Payment Terms:: TT or LC

Min Order Qty:: 25 m.t.

Supply Capability:: 300 m.t./month

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Features:

Mullite sand powder of aluminium silicate refractory material, generally used in stainless steel precision casting technology, refractory degrees 1750 degrees, mullite sand content of aluminum in more than 45%, iron content is below 1.2%, dust below 0.01%, indicating that the quality of mullite sand is the best. Casting the casting easy shelling, deformation, not easy to scale, good smoothness, high rate of finished products.

Item	Specification	Supper Grade
1	Al₂O₃ %	45-46
2	SiO₂%	51-53
3	Fe₂O₃%≤	1.2
4	K₂O+Na₂O%≤	0.2
5	CaO+MgO₂%≤	0.6
6	TiO₂%≤	0.08
7	Density g/cm²)≥	2.6
8	Flameresistant ℃≥	1750
9	LOI %≤	0.3
10	Size(mesh)	16-30
11	Dust-containing ‰≤	16-30mesh0.5

Q: Why can aluminium hydroxide not be used to make refractory material?: Hope my answer is helpful to you. It decomposes and produces aluminium oxide and water after heating, chemical equation for the reaction is: 2Al(OH)3=△=Al2O3+3H2O. Aluminium hydroxide can't be directly used to make refractory material because aluminium hydroxide is not stable.

Q: What are the materials of insulation firebricks?: The raw materials of firebricks, firebricks have various raw materials, and the composition of which can be divided into six categories: soil, stone, sand, mineral, powder and others. One of the raw materials, soil: bauxite, kaoline, clay, diatomite Another raw material, stone: fluorite, kyanite, andalusite, forsterite, vermiculite, mullite, pyrophyllite, chlorite, dolomite, sillimanite, magnesia-alumina spinel, and silica Another raw material, sand: clay sand, zircon sand, quartz sand, and magnesite Another raw materials, mineral: chromium mineral Another raw material, powder: aluminum powder, micro-silica powder, and silicon powder Another raw materials, others: asphalt, graphite, phenolic resin, perlite, cenosphere, sialon, corundum, silicon sulfate, silicon carbide, sodium silicate, silica sol, boron carbide, calcium aluminate cement, nitride material, haydite, aluminum oxide, alumina sol and zirconia, etc.

Q: How to understand qualitative and qualitative refractory materials?: Such as amorphous refractory castable, referred to as bulk loading, cast material, ramming material, refractory clay etc., utensils and other special products. Amorphous refractory material products, refractory heat insulating bricks and experimental and industrial crucible, spraying materials, such as burning bricks, electric melting brick, turn it into required shape and process heat treatment in where it is used.

Q: Do you know what the main indicators are for the inspection of refractory materials? Thank you very much for your requests and reports: Porosity, volume density, water absorption, true density, thermal expansion, thermal conductivity and heat capacity.

Q: How to make use of waste refractory materials whose main elements are alumina and mullite?: Crushing and pressing refractory bricks, or refractory parts . Such as welding positioner tracks use disposable tools.

Q: Does refractory belong to stone, building materials or other?: Refractories belong to organic non-metallic materials, stone and construction materials. After it is used in building. Just for your reference.

Q: Which fire-resistant materials have good viscidity?: The viscidity of fire-resistant materials is also known as the binding performance of fire-resistant materials. It can be divided into chamotte and chemical binder. Both can work at normal or high temperature. The most commonly used chamotte are soft clay and aluminate cement. The commonly used chemical binders include sodium silicate, phosphoric acid, aluminum sulphate, aluminium phosphate, phenolic resin, etc. Fire resistant material is a complicated and overloaded system and we cannot know its materials and chemical components from the name alone. Both gunning mix and repair mix contain binder components. If they can used after adding water, then they may contain clay or fire resistan aluminum silicate cement.

Q: Does anyone know about the classification standards of B2-level fireproof and thermal insulation materials?: 1.The insulation materials with A-level combustion performance: EPS Hairong module, rock wool, glass wool, foam glass, ceramic foam, foam cement, closed-cell perlite, etc. 2. The insulation materials with B1-level combustion performance: specially-treated extruded polystyrene boards(XPS)/ specially-treated Polyurethane(PU), Phenolics, Polystyrene rubber powder particles,etc. 3. The insulation materials with B2-level combustion performance: Expanded polystyrene sheets(EPS), Extruded polystyrene boards(XPS), Polyurethane(PU), Polyethylene(PE), etc. See the 2009 measures of building technology. The A-level insulation material is only fireproof, the insulation performance of it is worse than that of organic XPS \\\\ EPS material. Currently I think that the best insulation material should be Hairong EPS module, it not only achieves the requirement of insulation but also fulfills the goal of fireproofing, and the comprehensive unit price of it is not expensive. The insulation materials in the domestic market have their own disadvantages, you'd better take the building demands into consideration, and use the materials that are within the acceptable range.

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

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