Kaolin wool: advantages and scope

Kaolin wool consists of mullite-siliceous fibers and belongs to the category of heat-insulating materials. It is resistant to fire and is also used to fill the voids in the masonry and seal the slotted holes.

Description

The material, as a rule, is realized in the form of rolls. It is manufactured in the process of melting of silicon and aluminum oxides under the influence of high temperatures in special furnaces. Kaolin wool has been used extensively for thermal insulation of buildings for many years and surpasses many other materials by its characteristics. Despite the modern variety of other products with similar properties, it is becoming increasingly popular and has found its application in the industrial sphere. It acts as insulation in heat devices, combustion chambers, heat exchangers and turbines. The most widespread is in metallurgy. Also Kaolin wool is used in the manufacture of slabs 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 that are not characteristic of many materials with a similar purpose. Insulation is not affected by high temperatures in oxidizing and neutral environments, and the level of stability can be increased by the use of chromium oxides. Despite this, the main property, consisting in the preservation of heat, is significantly reduced in reducing environments.

Benefits

Wadding MCRR-130 is optimally suited for the creation of brake pads, insulation of furnace arches and wall structures. Its minimum weight reduces the amount of time and effort required for installation, and also reduces fuel costs. It is worth noting other positive aspects:

• Carefully purified fibers are highly resistant to devitrification;
• Minimum level of heat accumulation;
• Resistance to thermal shock;
• Preservation of initial characteristics at repeated use;
• High degree of noise insulation;
• Is not subject to the influence of chemical aggressive substances, alkalis and melts of metals;
• Is inert to mineral-based oils, vapors and water;
• Electrical insulation characteristics remain the same even under the influence of high temperatures.

Features

Kaolin refractory wool is made of alumina, the basis of which is quartz sand. In a special ore-thermal furnace, melting is carried out at a temperature within 1800 degrees. In the melting zone, there are three electrodes, while there are only two electrodes in the generation site. The blowing technique is used for smelting the material, it is based on the action of a special steam under the condition of a pressure of about 0.7 MPa. Ejection nozzle ensures the passage of the entire blowing process. As a binder, liquid glass, clay or cement can act.

Kaolin wool is realized in the form of rolls up to 10 meters in length, the thickness and width are 2 cm and 60 cm, respectively. It is flexible, thus ensuring a tight fit to any structure. Today, manufacturers are trying to improve the material by adding additional components, for example yttrium oxide. This improves the stability of the fibers and enhances the useability.

Materials resistant to fire

Refractory materials are made of a mineral base and are resistant to high temperatures, while their characteristics remain at the same level. They are indispensable in the metallurgical industry for performing distillation, evaporation and other processes, creating high-temperature mechanisms (motors, reactors) and parts to them. After use, refractories are sent for recycling.

Most often products of this type have a rectangular shape and a small mass, so that they are optimally suited for different lining. At present, there is a decrease in the production of simple refractories, as more attention is paid to the production of special solutions and concretes resistant to high temperatures.

Refractory materials: manufacturing methods

Materials Have a ceramic base, are made of refractory borides, nitrides, oxides and possess a high level of chemical inertness and strength. A carbon compound is also often used. Refractories retain their properties when exposed to temperatures of 1600 degrees and are used in many areas where there is a need to conduct any action under specified conditions. By the method of forming the product are divided into several types:

• Hot pressed;
• Cast, melted from the melt;
• Plastic forming;
• Cast on the basis of liquid foam foamer;
• Cut from processed blocks or rocks.