Raw Materials for Refractory:Calcined Magnesite Powder

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Specifications

Caustic Calcined Magnesite Powder
Product Category: 85 Grade,80 Grade,75Grade,70Grade
Caustic Calcined Manesite Ball

Caustic Calcined Magnesite Powder

Product Category: 85 Grade,80 Grade,75Grade,70Grade

Caustic Calcined Manesite Ball
Product Category: 85 Grade,80 Grade,75Grade,70Grade

Caustic Calcined Manesite Ball	Product Grade
Product Category	85	80	75	70
MgO content	85%	80%	75%	70%
Calcium oxide(CaO)	2.5%	2.5%	3%	3%
Loss On Ingition	7%	10%	12%	16%
Silica SiO2	6%	8%	10%	10%
Particle size	≤ 120	≤ 120	≤ 120	≤ 120

The caustic calcined magnesite is made from calcined magnesite po-wder through Mixing, pressing sphe-roid.It is used for converter steel making, through the splashing cross to protect the frunace, which can raise the furnace life.

No. Item Result
1 MgO % 98%min
Clarity Test OK
2 CaO 0.2%max
3 Fe 0.0075%max
Cl 0.035%max
SO4 1.0%max
4 Insoluble matter in acid 0.1%max
Heavy Metal 20ppm max
5 Bulk Density 0.32g/ml
Heating Loss 0.8%max
6 Screenings 250 99.5%

Q: Which company needs the new refractories?: The power plants are mainly used in steel plant, lime kiln, coking plants, boilers, etc. I will try my best to answer what I can. There are too many glassworks. You can tell me more anout what you need. As long as there is a large kiln business, the refractories and aluminum manufacturer are needed.

Q: Do you know the refractories?: Alkaline material products: MgO, CaO based crystalline phase, because MgO and CaO are alkaline earth oxides, so it is called alkaline refractory. Their high melting point, alkali resistance slag (C/S > 2) corrosion ability is strong, belong to advanced refractory materials, but they are easy to hydration. Magnesia chrome brick, dolomite brick, brick olive and other products, the main chemical composition is MgO, CaO China also belongs to alkaline materials.

Q: What are the construction measures of refractory material in winter? Please descriptive briefly.: The temperature is low in winter, so refractory bulk materials should be stirred evenly on time to avoid freezing.

Q: Is there vermiculite in refractory?: Foreign horticultural vermiculite includes four levels according to the diameter: 3 8mm is No. 1; 2 3mm No. 2, the most commonly used; 1 2mm to No. 3; 0.75 1mm to No. 4, suitable for seed germination. Vermiculite has strong water absorption capacity,

Q: I wanna ask what are the acidic refractories?: Usually, acidic refractory refers to a kind of refractory which contains a amount of silicon?dioxide. There are the following: (1) silica?brick with stronge acidity, unshaped silicious refractory, quartz glass and fused silica combined products; (2) semi-silica refractory with moderate acidity and pyrophyllite refractory; (3) clay-based refractory with weak acidity. The main features of the acidic refractories is resistant to the erosion of acidic substances (acidic residue) in high temperature, but is easy to react with alkaline material (basic slag). zirconite fireproofing material and silicon carbide as the special acidic refractories refractories are also in this category.

Q: What's the heat conductivity coefficient, specific heat capacity and density of the refractory material of magnesite-chrome brick and magnesia-alumina brick respectively?: It is suggested that you find some samples of well-known manufacturers, such as Ogilvy and Mather Group, and that will be more correct.

Q: Which region use more refractory?: Gongyi of Henan province use more refractories

Q: What's the A class fireproof and thermal inuslation matertial for external wall?: First, external wall thermal insulation material: 1. silicate insulation material; 2. glue powder polyphenyl granule; 3. cement cystosepiment with the use of steel wire gauze (polystyrere); 4. extruded sheet; Second, roofing materials: 1. xps extruded sheet; 2. EPS foam board; 3. perlite and perlite brick; 4. vermiculite and vermiculite brick; Third, materials for heating power and air conditioners: polyurethane, rubberplastic sponge, polyethylene, polystyrene foam, glass wool, rock wool; Fourth, steel structure material: polystyrene, extruded board, polyurethane board, glass cotton lap felt, etc.

Q: What are fire resistant level standards of class A fire resistant door?: Grade standards: class A fire resistant door is an important part of fire-fighting apparatus, and an important step in the social fireproof work. The quality and use of class A fire resistant door is closely related to the success or failure of the fireproof work.. There are steel and wood for class A fire resistant door materials. Only those whose fire endurance is no less than 1.5h can be called class A fire resistant door. In general, the class A fire resistant door internal material is perlite, and still some are vermiculite fireproof board, foam core board, MCcomposite materials, and other fireproofing materials. The thickness of class A fire resistant door is usually 50mm. In places where there is strict requirements for fireproof?performance, class A fire resistant door is often installed.

Q: Who knows the fire endurance of rock wool color plate?: I'm glad to answer your question and offer you some of my experiences, for reference only. In fire?safety?rules, it can be divided into non-combustible component, hard-combustible component, combustible component according to the combustible degree of building materials. Rock wool board is building board recombinated artificially by fibers processed by coated steels and inorganic minerals like basalt mineral, because steel plate and rock wool which is the main components are non-combustible material, so rock wool board should be considered as non-combustible component. The fire endurance of rock wool board has its own judging criteria. Lose sustaining power, integrity and fire insulation function. Its fire endurance is within 2 hours.

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