Advantages of kaolin wool and its fields of application
Based on the above characteristics, it can be seen that kaolin insulation is a high-performance heat-insulating material, which is also used for thermal compensation purposes.
The main properties of mullite-silica fiber are as follows:
- low density, and hence low weight, allow the use of cotton wool in a variety of conditions, including at height;
- low thermal conductivity allows the use of this material wherever it is necessary to ensure reliable thermal insulation of equipment or structures;
- high temperature resistance;
- low heat capacity;
- high chemical resistance - the material is practically inert to water, acids, oils, alkalis and water vapor;
- resistance to thermal shocks;
- elasticity - guarantees the maximum tight fit of the material to the insulated surfaces;
- resistance to deformation and vibration allows the use of insulation where other materials may be subject to destruction or lose their properties;
- excellent sound insulation;
- sufficiently high electrical insulating properties, which almost do not change when the temperature rises to 800 degrees.
All these properties of kaolin insulation allow it to be used for the following purposes:
- sealing windows, doors, shutters;
- refractory lining and its repair;
- insulation of gas ducts, heat generators, chimneys;
- creation of fireproof coatings;
- filling the cavities of the refractory masonry;
- construction of buildings, courts, boiler houses;
- insulation of tanks in which liquefied gases are stored;
- as a stuffing of heat-insulating layers of kiln trolleys;
- filtration of high temperature gases in an aggressive environment;
- in catalysis and reforming furnaces;
- thermal insulation of gas turbines;
- as insulation of cable channels located in combustible walls and partitions of buildings.
As you can see, in certain areas the popularity of this heater is very wide.
Not so long ago, zirconium and yttrium oxide began to be used as raw materials for the production of cotton wool, which made it possible to obtain a material that can withstand operating temperatures up to 2700 degrees. So far, these are prototypes, but the potential for their application is very high.
In private construction, kaolin insulation should be used where there is a possibility of high temperatures.
It makes little sense to use it as ordinary thermal insulation, since it will be very expensive compared to ordinary mineral wool.
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Production and quality characteristics
For the production of insulation are used:
- technical alumina with an aluminum oxide content of 99%;
- pure quartz sand;
- binder (the following materials are used as it: refractory clay, liquid glass, organosilicon binders, aluminous cement).
To obtain a melt of sand and alumina, ore-thermal furnaces are used. The process takes place at a temperature of about 1750 degrees. With the help of an injection nozzle and steam supplied at a pressure of 0.7–0.8 MPa, the melt is inflated, forming the final product. The density of the insulation can be from 80 to 130 kg / cu. m.
Kaolin insulation is available in various types:
- lump cotton;
- rolls;
- plates;
- shells;
- segments.
Often, kaolin insulation is called mullite-silica fiber, which is reflected in the labeling of products made from it. Conventional fiber is referred to as MKRR, and fiber with the addition of chromium as MKRS.
The addition of chromium makes it possible to create a material with even greater temperature resistance.
The main task of thermal insulation of fireplaces and stoves
The most important aspect in the operation of fireplaces and stoves is fire safety.Here is just the case when the desire to save money or banal negligence, together with ignorance, can lead to big trouble. The main structural element responsible for safety is high-temperature thermal insulation.
Theoretically, you can do the installation yourself, but since we can talk about human lives, it is better to entrust this work to specialists. There are many companies on the construction services market that can perform such a service with high quality, but the choice of a contractor should also be approached with all rigor - the company must have been on the market for a long time and have an excellent reputation. It is not necessary to attract guest workers and coven workers, there will be no one to ask.
