Kaolin wool consists of mullite-silica fibers and belongs to the category of heat-insulating materials. It is resistant to fire and is also used to fill voids in masonry and seal slotted holes.
Description
The material is usually sold in the form of rolls. It is made by melting silicon and aluminum oxides at high temperatures in special furnaces. Kaolin wool has been actively used for thermal insulation of buildings for many years and surpasses many other materials in its characteristics. Despite the modern variety of other products with similar properties, it is becoming more and more popular and has found its application in the industrial field. It acts as insulation in thermal devices, combustion chambers, heat exchangers and turbines. The greatest distribution is noted in metallurgy. Also, kaolin wool is used in the manufacture of plates and other molded elements.
The material has a high level of sound and heat insulation, resistance to vibration loads and deformation. In addition, cotton wool has other properties thatnot typical for many materials with a similar purpose. The insulating agent is not affected by high temperatures in oxidizing and neutral environments, while the level of resistance can be increased by using chromium oxides. Despite this, the main heat retention property is significantly reduced in reducing environments.
Benefits
Wood MKRR-130 is optimally suited for creating brake pads, insulation of furnace arches and wall structures. Its minimal weight reduces the amount of time and effort required for installation, and reduces fuel costs. Other positive aspects worth noting:
- thoroughly cleaned fibers are highly resistant to devitrification;
- minimum heat storage level;
- resistance to thermal shock;
- retaining original characteristics with repeated use;
- high degree of sound insulation;
- not affected by chemical aggressive substances, alkalis and metal melts;
- inert to mineral oils, steam and water;
- The electrical insulation performance remains the same even when exposed to high temperatures.
Features
Kaolin refractory wool is made from alumina, which is based on quartz sand. In a special ore-thermal furnace, melting is carried out at a temperature within 1800 degrees. In the zonemelting, there are three electrodes, while at the place of production there are only two of them. The blowing technique is used to melt the material, it is based on the impact of special steam under the condition of a pressure of about 0.7 MPa. The ejection nozzle ensures the passage of the entire blowing process. Liquid glass, clay or cement can act as binders.
Kaolin wool is sold in rolls up to 10 meters long, thickness and width are 2 cm and 60 cm, respectively. It is elastic, which ensures a snug fit to any design. Today, manufacturers are trying to improve the material by adding additional components, such as yttrium oxide. This improves the stability of the fibers and expands the possibilities of use.
Fire resistant materials
Refractory materials are made from a mineral base and are resistant to high temperatures, while their performance remains at the same level. They are indispensable in the metallurgical industry for carrying out distillation, evaporating and other processes, creating high-temperature mechanisms (motors, reactors) and parts for them. After use, the refractories are sent for recycling.
Most often, products of this type have a rectangular shape and low weight, so they are optimally suited for various linings. At present, there is a decrease in the production of simple refractories, as more and more attention is paid to the production of special mortars and concretes,resistant to high temperatures.
Refractory Materials: Manufacturing Methods
Materials have a ceramic base, are made from refractory borides, nitrides, oxides and have a high level of chemical inertness and strength. A carbon compound is also often used. Refractories retain their properties when exposed to temperatures from 1600 degrees and are used in many areas where there is a need to carry out any action under specified conditions. According to the method of forming products are divided into several types:
- hot-pressed;
- cast, smelted;
- plastic forming;
- cast based on liquid foam slip;
- cut from processed blocks or rocks.
