Refractory Raw Materials-Sintered Spinel Materials

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Tianjin
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TT OR LC
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20 m.t.
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1000 m.t./month

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Product Description:

It's made of industrial alumina and high purity caustic magnesia powder as raw materials. Sintered in super high temperature rotary kiln, characterized by big hardness , small coefficient of thermal expansion etc, it's ideal raw material of ladle castable and magnesia-spinel bricks.
Specification

Application

It's extensively applied to the lining of converter, glass kiln, open hearth, casting ladle etc.


 In the same condition, using manganese or silicon to deoxidize separately, the burn out rate are 46% and 37%, but it is only 29% if using manganese alloy to deoxidize. So, it is used widely to smelting steel and its output increases faster than ferroalloy's, so has become an indispensable composite deoxidizing and alloy additives in steel industry. The silicon-manganese which contains carbon below 1.9% still is used to produce medium/low-carbon ferromanganese and semi-finished products of electro silicothermic process manganese metal.

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Q:what is the specs of thermal insulation refractory slab ?
fireproof panel is also called refractory slab, which refers to a layer of veneer. Its thickness is generally about 0.8 mm and there is a veneer made after compression of surface layer of paper, colored paper and multilayer kraft paper. Wear-resistant, heat-resistant and fire-resistant properties, scratch resistant and easy to clean, rich colors and good stability.
Q:Refractories for iron-making blast furnace?
Vibrating materials, corundum brick and aluminum carbon brick will be developed. Taphole commonly use stemming, silicon carbide - graphite bricks, whose material is Al2O3-SiC-C. Medium and large sized blast furnaces in China use dense mullite bricks, castable, graphite brick. Common lining material for iron ditch is ramming mass. hearth and furnace bottom common use carbon bricks, semi-graphite bricks, charring silica bricks, corundum bricks. Blast furnace bosh and lower part of furnace stack commonly use mullite bricks.
Q:What's the material of fireproof and wear-resisting floor?
It is the kind of special concrete floor, and it should prevent from crash for it will produce fire by friction. It is mostly used for the warehouses storing explosive and inflammable objects and chemical materials. And its production process is the same with that of the common concrete floor, but it uses different material which needs to be the pebbles and sand after processing with marbles and dolomite.
Q:what is steel fire door made of ?
1. fire resistance steel door has steel made door frames, door leaf framework and door panels. if the door leaf is filled with nontoxic fire insulation material, added with fireproof hardware accessories, which consists of a door that is fire resistance. 2. Category 1)safety facilities to prevent underground building from fire expansion and control volatilation. It is usually divided into steel and wooden fire door. 2) Class A fire doors, fire endurance of 1.5 hours; B fire doors, fire endurance of 1.0 hours; Class C fire doors, fire endurance of 0.5 hours. 3) In fact, there are many types of fire doors. For example, there are wooden made fire doors glass fire doors and steel fire doors based on different materials. access control fire doors, entrance fire resistance door, interior fire doors, explosionproof and fireproof door, quick-lock fireproof doors, quick opening door encountered with fire and multi-functional fire doors. 4) Based on the installation location: External fire doors and built-in fire doors. 5) divided by technology: Electronic fire doors.
Q:Who knows how many fire heat preservation material are there?
They can be divided into wood fire, steel fire and stainless steel fire. Wooden fireproofing material is light weight, easy for installation and second decoration, as well as all types of civil construction and some industrial buildings. It can be realized through inorganic insulation materials, such as glass wool, rock wool, foam glass etc.. The phenolic foam materials inside organic foam material is more special. Phenolic foam does not only have a good thermal insulation performance, but also can be combined with steel and other materials, to achieve a class A fire retardant level. Class A thermal insulation include: 1 thermal insulation materials with class A combustion performance Fire insulation materials of fire barrier zone can use class A material with class A combustion performance in rock (ore) cotton, foam glass, inorganic thermal insulation mortar.
Q:What are the applications of refractory in petroleum?
Petroleum industrial furnace has many varieties. Generally, it includes tubular with complex structure, whose use temperature is generally 500 to 600 degrees centigrade, sometimes may be 800 degrees centigrade. Petroleum gas contains hydrogen sulfide and solid particulate matter; first correct the answer of the first floor: It is not used in petroleum industry. As shown in the left picture, it is tubular heating furnace, appilied to metallurgical industry. Lined with lightweight insulation and wear-resistant layers, and resistant to wear and corrosion: 1; & nbsp, but the using temperature is not high; it is a thermal equipment in the oil refining process. High alumina refractory castable used for refractory layer. It is an important equipment of petroleum boiling catalysis and dissociation. You can choose light refractory bricks or refractory castables; as shown in the right picture, it is catalytic cracking unit, and can bear pressure. Note; & nbsp: // f; & nbsp.hiphotos, fire-resistant plastic or refractory ramming mass has chemical corrosion and wear effect on lining; & nbsp, less than 1,350 degrees centigrade. The yse temperatures is up to 1,100 degrees centigrade.
Q:What refractories are resistant to fluorine gas?
It is recommended to use fused-quartz brick, which will produce hydrofluoric acid fluorine (an acidic gas) when water vapors. It is cheap. While it is recommended to use silica brick if it exceeds 1,200 degrees. So acidic refractory is an advisable refractory for using. It works well if the temperature is below 1200 degrees.
Q:What's the fire endurance of fire windows?
Fire endurance of fire windows: A class fire window: no less than 1.2h; B class fire window: no less than 0.9h; C class fire window: no less than 0.6h. Technical requirements: 1. Materials and fittings: (1) Window frame should adopt the steel frame or wood frame with certain strength so as to guarantee the integrality and stability of the fitting; (2) Steel frame and mound layer can choose the galvanized steel sheet or stainless steel sheet. Its selection standard is in line with provisions of Article 5.1 in GB12955 "General Technical Requirements on Steel Fire Doors"; (3) Selection standard of wood frame and mound layer should be consistent with the provisions of Article 5.1.1 in GB14101 "General Technical Requirements on Wood Fire Doors"; (4) Filler material inside the steel frame and wood frame should be incombustible material; (5) Fireproof glass can choose the qualified product with no influence on the fire resistance test of the fire window, and its light transmittance should be no less than 75% of that of the ordinary sheet glass with the same layers; (6) Sealing material between the frame and the fireproof glass should use flame retardant material which can play the role of fire prevention and smoke control in the case of fire. (7) Hardware fittings should be approved supporting products which is detection qualified.
Q:What is fire retardant coating mainly used for?
The functions of refractory coating are as follows: 1. Non-intumescent fire retardant coating is mainly used for the fireproofing of wood, fiber board and other materials, and it is used in the surfaces of wood truss, roof, doors, windows and etc. Second, the intumescent fire retardant coating can be divided into non-toxic intumescent fire retardant coating, expansible fire retardant coating emulsions, solvent-based fire retardant coating. 3. Non-toxic intumescent fire retardant coating can be used to protect cables, polyethylene pipes and insulation board. 4, The expansible fire retardant coating emulsion and solvent-based fire retardant coating can be used for fireproofing of buildings, electricity power, and cables. 5. New fire retardant coating: Transparent fire retardant coating, water-soluble intumescent fire retardant coating, fireproof emulsion paint, polyvinyl acetate emulsion fire retardant paint, water-soluble intumescent fire retardant paint drying at room temperature, fire insulation coating polyolefin fire retardant coating, modified high chloropolyethylene fire retardant paint, chlorinated rubber fire retardant coating, firewall coating, intumescent coatings, wire and cable fire retardant paint, new fire retardant coating, casting fire retardant coating and so on.
Q:How much is the content of boron carbide in refractory material?
Boron carbide is used in refractory material. For example, generally we could add 0.2% of boron carbide into magnesia carbon bricks. It is suggested that 0.5% is enough, because it has strong effect in boosting melt. It is said that 0.5% would be alright since boron oxide after oxidation belongs to material of low melting point, so the amount should be limited within 0.5%-1%,

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