Ceramic Fibre Blanket 1260 Aluminosilicate Insulation Foil Rolls

Aluminium silicate cotton and its products
It is made from hard clay clinker or industrial aluminum oxide powder combined with silica powder as raw materials, melted in an electric arc furnace or resistance furnace, and then compressed air injection (or wire throwing method) to form fibers.
Its chemical composition is mainly aluminum trioxide (30-55%) and silicon dioxide. After being reprocessed into products such as blankets, felt, boards, paper, ropes, and various prefabricated blocks and components.
2, Classification and characteristics
1. Low temperature Aluminium silicate fiber: generally, the content of Al2O3 is more than 40%. This type of fiber has low production cost, high shrinkage rate, lax requirements for harmful impurity content, and is cheap in price. It is only slightly more expensive than mineral fibers, but has better heat resistance than mineral cotton.
The use temperature of 700~800 ºC provides favorable conditions for the composite lining of industrial furnaces, solving the gap between the use temperature of 700~900 ºC that ordinary fibrous insulation materials cannot withstand.
2. Ordinary Aluminium silicate fiber: natural hard clay clinker is used as raw material, the content of fiber Al2O3 is ≥ 45%, and the content of harmful impurities is 3%~4%.
The fiber usage temperature is 1000 ºC.
High purity Aluminium silicate fiber: the synthetic material of industrial aluminum oxide powder and silica powder is used as raw material, so that the content of harmful impurities is less than 1%. It is not only used at higher temperature than ordinary Aluminium silicate fiber, but also suitable for reducing atmosphere. The fiber usage temperature is 1100 ºC.
High alumina fiber: Made from industrial aluminum oxide powder and silica powder as raw materials.
Fiber Al2O3 content ≥ 55%, harmful impurity content<1%. Due to the high content of Al2O3 in the fiber and the ratio of Al2O3 to SiO2 content in the fiber close to the composition of mullite, the crystallization amount of cristobalite is reduced, thereby improving the heat resistance and thermal vibration resistance of the fiber. The fiber usage temperature is 1200 ºC.
Chromium containing Aluminium silicate fiber: add 3%~6% Chromium(III) oxide into the high-purity Aluminium silicate fiber composite to inhibit the crystallization change of amorphous fiber under heating conditions, so it is also called chromium stabilized fiber.
The fiber usage temperature is 1200 ºC. 2. 6 Zirconium containing Aluminium silicate fiber: Zircon sand is added to the synthetic raw materials of aluminum oxide powder and silica powder to make the ZrO2 content in the fiber reach 12%~15%. Increase the fiber usage temperature to 1300 ºC

Main production methods and process flow


The main production method: the melting of Aluminium silicate fiber raw materials generally uses electric furnace as the melting equipment, mainly including resistance furnace and electric arc furnace.
The forming methods of fibers are divided into blowing method, spinning method, and spinning blowing method.
The process flow of electric arc spraying into fiber and wet felt making is qualified. The raw materials are added to the electric arc furnace for melting, forming a stream. The stream is blown by compressed air or steam to form fibers. After being removed by a slag remover, the cotton is collected to form finished fibers. After the finished fiber is sent to the stirring tank for vortex slag removal, it is sent to the storage tank, where adhesive is applied to form a slurry.
The slurry is molded by a press or filtered by vacuum suction, and dried to form a Aluminium silicate cotton product. The process of electrical resistance jet (or wire spinning) fiber forming and dry needling blanket making Aluminium silicate fiber dry needling blanket has two production processes according to different fiber forming methods; Resistance method blowing (including flat blowing and vertical blowing) to form fibers and dry method needle punching blanket making process; Resistance method for spinning fibers and dry method for needle punching blankets. The "needle punched blanket" is developed by drawing on the technology of non-woven needle punching. When the loose fiber blank is fed into the needle punching machine for needle punching, the hooked needle on the needle tightly interweaves the fiber layers to improve the tensile strength and wind erosion resistance of the fiber blanket.

Domestic application Aluminium silicate fiber materials have been widely used in metallurgy, building materials, machinery, petroleum, chemical industry, electronics, shipping, transportation, light industry and other departments


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