In recent years, ceramic wool application prospect in high temperature calcining kiln growing, with all kinds of ceramic wool products with good insulation effect, convenient use, especially the characteristics of small heat storage, widely used in all kinds of kiln, showed high energy saving efficiency greatly.

(1) the varieties and properties: ceramic refractory fiber is the most important indicator of the diameter of the fiber and the thermal stability.That is commonly used in ceramic industry is Al2O3SiO2 fiber, according to the different use of the content discretion of Al2O3 into range, in which also introduce the Cr2O3 material to improve its refractory and antioxidant properties.Generally a high content of alumina, low content of impurities such as iron oxide fiber products are pure white, the introduction of chrome oxide fibers were pin with milk yellow color.Ceramic wool diameter to an average of 24 microns.Fiber thin, density is small, high thermal conductivity with temperature.If the coarse fibre, density is used when the effect is not ideal.Thermal stability index of the fiber is more important.Al2O3 - SiO2 fiber products in 1260 ℃ between linear shrinkage in the range of 3588%.Shrinkage is also directly affect the thermal stability.

Because the fiber of low thermal conductivity, low density, light weight, the design of construction of the kiln all use lighter steel support structure, which makes the development of ceramic kiln into the era of kiln lightweight.Fiber regenerative small way, to adapt to the rapid heating up, cooling firing.Fiber flexible can be processed into grooves or opening of the products, and has good mechanical vibration and impact resistance, chemical stability is better also, these advantages for the development of the new type of kiln, and spread to the ceramic technology, the development of the industry have important role.Now ceramic wool products are: blanket, blanket, block, bulk fibers, fiber paper and all kinds of vacuum forming products, scope of work is in commonly 8711427 ℃, special circumstances can be short-term use above the limit temperature of the heat.

(2) the laying method and the matters needing attention: refractory fiber felt, is suitable for the kiln lining can greatly improve the efficiency of energy saving.Generally use organic binder fiber volume to synthesize cylindrical or sheet shape of fabric.Kiln lining using high temperature of lightweight brick masonry, refractory ceramic wool blanket paste into lining are available, and after burning, fiber mat or plate to form a certain rigidity and has a satisfactory response ability, when cooling can bounce make joint taut.

Laying fiber usually has two kinds of methods: one is to apply a layer of a layer of carpet, reoccupy bolt rod riveting, generally under 1222 ℃ using heat-resistant metal bolt rod, above 1223 ℃ using TaoCiZhi riveting pieces.On hot surface at one end with loose fibers and cement filling.Using TaoCiZhi riveting pieces also can prevent fiber metamorphism caused by carbon deposition.The second method is to use prefabricated assembly, the use of carpet stack bricks or use 305 mm wide carpet folded into accordion type casting.Both, compared to the latter due to heat surface close to the furnace shell are the same material, energy saving efficiency is higher, but the cost is higher.At higher temperatures, fiber fabrication masonry have scalability fiber inlaid forming seam.With prefabricated assembly installation convenient, fast and convenient maintenance, just put the replacement for the damaged parts.

In terms of thermal efficiency, layer upon layer sticking method is superior to prefabricate assembly.Because fiber direction is perpendicular to the heat of the former, stacked in the shape of a prefabricated assembly fiber direction parallel to the heat flow, the amount of heat conduction differential value is about 2040%, such as accordion folded prefabricated assembly is somewhere in between, the fiber direction for heat flux both parallel and vertical.

(3) the development outlook: due to rising energy prices, fuel costs will become the bottleneck of restrict ceramics development, energy saving more and more important.For kiln heat loss becomes more and more people concern, some directly in the original surface labeled with a layer of refractory lining refractory ceramic wool to improve the thermal efficiency.Before those who must be a noticeable cracking or peeling off part of the kiln wall repair well.But heat insulation refractory brick and refractory fiber can't arbitrary abuse.So far as basic oxygen furnace, such as cement rotary kiln lining, due to high temperature and chemical erosion, temporarily cannot use fiber for lining.

For continuous heating equipment such as ceramic tunnel kiln, have already realized the refractory ceramic wool is used as the lining of continuous heating equipment, according to relevant data, used in a rapid push board kiln and tunnel kiln refractory ceramic wool are significant energy saving effect.Especially the ultra high temperature heating, such as sintering temperature in the furnace of 1538 ℃ 1649 ℃, using refractory fiber the best energy saving effect.

At present, the ceramic kiln equipment in Europe, America and Japan are all made of ceramic wool lining.Not long ago, Japan will gas tunnel kiln is decomposed into such as section structure of car manufacturing, and then to porcelain factory assembled on the construction site, all this is due to the ceramic wool materials, greatly saves the building cost of the kiln, and simpler.From the aspects of material modification promote energy saving effect ceramic wool products research is underway.