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The non-pollution ceramic fibre is heat insulation fire-proof material development direction

Date: 2010-12-22

      The ceramic fibre is one kind of fibrous light quality refractory material, the main chemical composition is the aluminum silicate, may divide into the glassy state textile fiber and the multi-crystalline state textile fiber two broad headings according to its mineral constituents. The glassy state textile fiber is the material by the fusing class liquid state one non-stereotypia solid state textile fiber which forms in cooling; The polytropism textile fiber uses the colloid blowing process (or flings silk law) to become the filament, the high temperature calcine production. The ceramic fibre widely applies in each kind of hot working kiln stove's heat insulation thermostable material, because its bulk specific gravity is lower than other fire-proof materials greatly, thus the regeneration is very small, the heat insulation effect is obvious, may reduce the hot working kiln stove's energy loss greatly as the furnace lining material, has brought a revolution in the energy conservation aspect for the hot working kiln stove. On the other hand its applied technology and the method have brought a revolution similarly to the hot working kiln stove's masonry and building.
 
1. use present situation The ceramic fibre appeared most early in 1941, American Babu, Vyell the Cox company with the natural kleit, fused the injection with the arc furnace to become the textile fiber. In the late-1940s, the American two companies produced the aluminum silicate series textile fiber, and applied for the first time in the aviation industry; In the 1960s, the US developed many kinds of ceramic fibre product, and used in the industry kiln fire walls lining. In the 1970s, the ceramic fibre started in our country to produce the use, its applied technology obtained the rapid promotion in the 1980s, but was mainly suitable the temperature range in 1000℃ below, applied technology relatively simple backwardness. After the 1990s, along with contains the zirconium textile fiber and the polytropism aluminum oxide textile fiber promoted application, the application temperature enhances 1000℃~1400℃, but as a result of the product quality flaw and applied technology's backwardness, the application domain and the application way receives the limitation. If the polytropism aluminum oxide textile fiber cannot make the textile fiber blanket, the product specification is unitary, disperses the cotton and kapok, the textile fiber block primarily, although improves with the temperature, but the intensity is very bad, has limited the use scope, also reduced the service life. Including the zirconium textile fiber is with the fusing law production one versatility, the cost low aluminum silicate textile fiber, but serves as the masonry and building each kind of hot working kiln stove's fire surface entire textile fiber furnace lining massively, at present the domestic product relatively is also backward in this aspect's quality and the application development, now overseas presented the chromic textile fiber, the use temperature ratio has been higher including the zirconium textile fiber, domestic did not have this aspect report.
     
        2. type and use Ceramic fibre's variety mainly has: Ordinary aluminum silicate textile fiber, high aluminum aluminum silicate textile fiber, aluminum silicate textile fiber (Cr2O3, ZrO2), polytropism aluminum oxide textile fiber and polytropism mullite textile fiber and so on. In recent years, overseas already succeeded the development (or development) some new ceramic fibre variety, like the forsterite textile fiber, the ceramic fibre (SiO2-CaO-MgO is and Al2O3-CaO is) and so on. Ceramic fibre cotton and kapok, felt, blanket, module, paper, cloth, belt, rope and so on. Ceramic fibre blanket (textile fiber module): Uses from the melt type, Lian Ronglian flings the technique of production to make flings the silk long textile fiber, causes the textile fiber after the two-side needleds to interweave becomes, may take the flame fire surface directly, the collection is fireproof, the heat insulation, the heat preservation in a body, in neutral, oxidized and the leaning reducible disposition medium and long-term use, still could maintain the good intensity, toughness. Uses the textile fiber module which this kind of textile fiber blanket makes not to contain the cement, the thermostability is good, widely applies in heat preservation heat-resisting domains and so on petrochemical, metallurgy, electric power. Ceramic fiberboard: By the ceramic fibre and the cement, the chemical additive, after pulping, the formation, the solidification, dry and so on working procedures are made. The ceramic fiberboard flexibility good, easy to cut, the intensity to be high, is one kind of low thermal conductivity, the low regeneration quantity new energy conservation environmental protection product, widely applies in each kind of heater's wall, goes against and so on spot back linings, is the Heavy tar fire-proof material. Ceramic fibre cloth, belt: Mainly applies in the fire door, the industry kiln stove heat insulation, the hot channel and vessel's heat insulation. Ceramic fibre rope: Mainly applies in each industry kiln stove swollens the expansion joint, hot channel's winding heat preservation, the steel structure attachment point heat insulation and so on. Ceramic tissue paper: By the ceramic fibre and the cement, the chemical additive, after pulping, the formation, the solidification dry and so on working procedures are made, is the seal, the heat insulation ideal material. May use in each kind of hot working kiln stove swollening spot heat preservation heat insulation and so on expansion joint, high temperature liner. In addition, the ceramic fibre may also use in filtering and the catalyst carrier material, the padding material and the friction material, the heat insulation coating, the enhancement material and so on.

The ceramic fibre is coming to replace the firebrick.