OOO TD PromStroyKomplekt delivers MKRR kaolin wool to Moscow, Izhevsk, Nizhny Novgorod, Yekaterinburg and other regions of the country. To calculate the price of a batch of this material with delivery, leave an online application or contact our employees by phone numbers listed in the "Contacts" section.
Production of cotton wool MKRR
The raw materials for the manufacture of kaolin wool are oxides of chromium, silicon and aluminum. Their connection is carried out in special ovens. The mass obtained in the course of melting and blowing is converted into light, thin and plastic fiber, from which mats and other shaped products are then made. In terms of its operational characteristics, the resulting product must comply with the requirements of GOST 23619-79.
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Basic properties and characteristics of refractory kaolin wool
Domestic manufacturers produce the following grades of material:
- MKRP-130;
- MKRV-200;
- MKRRH-150.
They are characterized by the following physical and chemical parameters (according to GOST 23619-79):
- density of about 130 kg per m 3;
- small specific gravity;
- thermal conductivity over 0.15 W / mK;
- application temperature no more than 1150 ° C.
Mullite-silica wool grades MKRRKh-150 (chromium) and MKRR-130 is inert to steam, water, non-ferrous metal melts and oils, resistant to acid and alkaline media. It is characterized by a low level of heat capacity and high resistance to temperature changes.
Rolled mullite-silica material is easy to pack and transport by various means of transport. Due to its low weight, it is easy to install. Grades of cotton wool MKRV have high strength and are resistant to tearing.
We will carefully deliver "Refractory mullite-silica wool"
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Scopes of cotton wool MKRR, MKRV, MKRKh-150
The main area of application of mullite-silica roll material of the MKRR-130, MKRRKh-150 and MKRV-20 brands is the creation of insulation for various heating objects. Most often, mats are used to protect production equipment from high-temperature exposure that occurs during technological processes, as well as to reduce the risk of fires and increase the efficiency of furnaces.
In addition, MKRR-130 mats are used:
- to perform work on thermal insulation of furnace vaults and other technological objects operating in conditions of high and ultra-high temperatures;
- for lining gutters and pipelines used to transport melts;
- for thermal insulation of heat generators, gas ducts and chimneys;
- for filling seams and compensating gaps in structures operating in high-temperature conditions;
- for sealing burners, dampers, doors.
Kaolin refractory wool MKRR-130 serves as an excellent raw material for the manufacture of plates, blocks, casings and inserts of various shapes. It is necessary for manufacturers of catalyst carriers, automotive brake pads, high-temperature filters, and other units and parts used in the creation of machinery and equipment for various industries.
Our company offers MKRR-130 kaolin wool and other refractory materials. You can get acquainted with the prices (in rubles / m 3) in the price list on the website.
Kaolin wool consists of mullite-silica fibers and belongs to the category of heat-insulating materials. It is fire resistant and is also used for filling voids in masonry and sealing crevices.
Description
The material is usually sold in rolls. It is made by melting aluminum and exposed to 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 is distinguished by a high level of sound and heat insulation, resistance to vibration and deformation. In addition, cotton wool has other properties that are not characteristic of many materials with a similar purpose. The insulating agent is not affected by high temperatures in an oxidizing and neutral environment, while the level of stability can be increased through application. Despite this, the main property of retaining heat is significantly reduced in reducing environments.
Advantages
Cotton wool MKRR-130 is optimal for making brake pads, insulating furnace vaults and wall structures. Its minimal weight reduces the amount of time and effort required for installation, and also reduces the cost of fuels and lubricants. Other positive aspects are worth noting:
- thoroughly cleaned fibers are highly resistant to devitrification;
- minimum level of heat accumulation;
- thermal shock resistance;
- preservation of the original characteristics with repeated use;
- high degree of noise insulation;
- not affected by aggressive chemical substances, alkalis and metal melts;
- inert to mineral oils, vapors and water;
- the electrical insulation characteristics remain the same even when exposed to high temperatures.
Peculiarities
Refractory kaolin wool is made of alumina based on quartz sand. In a special ore-thermal furnace, melting is performed at a temperature of 1800 degrees. There are three electrodes in the melting zone, while there are only two in the place of production. The blowing technique is used to melt the material, it is based on the effect of special steam, provided there is a pressure of about 0.7 MPa. The ejection nozzle ensures that the entire inflation process goes through. Liquid glass, clay or cement can be used as binders.
Kaolin cotton wool is sold in the form of rolls up to 10 meters long, thickness and width are 2 cm and 60 cm, respectively. It is distinguished by its elasticity, which ensures a snug fit to any structure. Manufacturers today 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
They are made from a mineral base and are resistant to high temperatures, while their characteristics remain the same. They are indispensable in the metallurgical industry for carrying out distillation, evaporation 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 lining. 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 that are resistant to high temperatures.
manufacturing methods
Materials have a ceramic base, are made of 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 it becomes necessary to carry out any actions under specified conditions. According to the method of formation, products are divided into several types:
- hot pressed;
- cast, fused from the melt;
- plastic formation;
- cast on the basis of liquid foam slip;
- sawn from processed blocks or rocks.
Properties
This material has pronounced insulating properties. This fiber is successfully used in various fields due to its high refractory properties. It is also widely used for filtering gases at relatively high temperatures. Considering its good fire resistance, kaolin wool is well suited as a base material.
The fibers of this cotton wool show a high resistance to the effects of various chemicals, such as alkalis and acids. Possesses good electrical insulating properties. Also, this material has high plasticity, so it can be used in any structures, regardless of the type and shape. All these properties of kaolin wool make it possible to use it for a wide variety of purposes.
Specifications
Consider the technical characteristics of MKRR-130 kaolin wool:
Application of kaolin wool
The scope of the material is extremely wide. Kaolin wool can be used as a lining for ovens. Also, as a heat-insulating material, it is widely used in the insulation of fumes, gas ducts, turbine generators. She also received application in everyday life. At the moment, in many regions, kaolin wool is used as an insulating material for insulating walls, windows and doors. Good noise insulation of the material also contributes to this. Due to the special properties of kaolin wool, it is used to produce paper, various blocks, plates, specialized filters, and is used in areas where it is necessary to ensure good resistance to high temperatures. You can see a photo of the material itself on this page.
Advantages
Each building material has both advantages and disadvantages. Kaolin wool is no exception, having a number of important advantages over analogues:
- Low thermal conductivity... Thanks to this feature, the material can be used in various areas of economic and household activities and purposes, where it is necessary to provide reliable thermal insulation of a structure or material.
- Low weight... Due to its porous structure, it has a relatively low mass, which allows the material to be used at any height, surface and in a variety of conditions. Also, thanks to this, the installation of such systems is quite quick and easy.
- Efficiency... Thanks to the use of highly efficient energy-saving technologies, it is possible to significantly increase the savings in heat consumption and energy resources. This entails budget cuts in costs and saves money.
- Sustainability... One of the advantages of the material is its high resistance to irritants such as high and low temperatures, exposure to steam and water, gases and acidic substances and environments. This makes kaolin wool very practical and can be used in industries where other materials will not last long.
For a long time, there have been disputes about the harmfulness of kaolin wool to human health. It is generally accepted that any synthetic fibers have a negative effect on a living organism, but this has not been definitively proven. Discussions are still ongoing. In addition, other materials are also mainly of artificial origin, so the effects are similar.
Company "Keramomix" supplies thermal insulation materials for the manufacture of new and repair of old electric furnaces.
In order to order heat-insulating materials for the manufacture of new and repair of old electric furnaces and to clarify prices, please contact our managers. You will find their phones in the section Contacts.
Thermal insulation boards
Heat insulating refractory plates- durable and technologically advanced insulating material. Plates are cut with a hacksaw, easily cut, cut out the necessary shapes, glued with inorganic glue or fixed with a metal fastener.
Refractory insulation boards chemically resistant to alkalis and acids, except for strong alkalis, phosphoric and hydrofluoric acids, resistant to temperature in an oxidizing and neutral atmosphere. In a reducing environment, the thermal insulation properties of the boards are reduced.
Our company provides a service for the selection of thermal insulation materials according to individual requirements... We make thermal calculations and give recommendations on the use of a particular material. For the fastening of thermal insulation boards, our company is ready to recommend various options for fasteners and glue.
Thermal blankets and mats
Exceptional thermal performance in combination with high mechanical strength, flexibility, elasticity make it an irreplaceable material in industries related to high temperatures, heat treatment, thermal insulation, as well as in the manufacture of furnaces and boilers of various types. Insulation blankets are a ready-to-use high-tech product.
Additional characteristics are:
- excellent thermal stability and resistance to thermal shock;
- excellent chemical stability;
- high tensile strength;
- low thermal conductivity;
- the ability to store at low temperatures;
- high ability of thermal reflection;
- excellent corrosion resistance;
- excellent thermal stability;
- manufacturability and ease of installation.
Ceramic blankets supplied in rolls with a thickness of 10 to 50 mm. The width and length of the rolls can be different. According to requirements Customer the optimal variant is selected according to the size and temperature of application. For fastening these materials in furnaces and other objects, our company is ready to recommend various fasteners.
Based ceramic fiber blankets manufactured modular blocks... Our company supplies these units at all the above temperatures. Modular blocks supplied with fasteners for mounting blocks on the surface of thermal units.
In order to clarify prices and place an order, you need to contact our managers. You will find their phones in the section Contacts.
The table shows the brief characteristics of ceramic fiber blankets:
| Specifications | Ceramic blanket 1150 | Ceramic blanket 1350 |
| Application temperature, ° С | 1150 | 1350 |
| Density, kg / m3 | 128 | 128 |
| Thermal conductivity coefficient at temperatures, W / m * K: | ||
| 600 ° C | 0,12 | 0,13 |
| 800 ° C | 0,14 | 0,16 |
| 1000 ° C | 0,27 | 0,28 |
| Linear shrinkage after 24 hours of heating at temperatures: | ||
| 950 ° C | 1,4% | - |
| 1100 ° C | 1,9% | 2% |
| 1350 ° C | - | 2,5% |
| Tensile strength, kPa | more or less 50 | more or less 50 |
| Chemical composition, %: | ||
| Al2O3 | 47 ± 2 | 39 ± 1 |
| SiO2 | 53 ± 2 | 45 ± 2 |
| ZrO2 | - | 16 ± 1 |
Kaolin wool belongs to refractory materials, since it is produced from natural refractory clays and kaolins or from synthetic mixtures of kaolin and high-alumina compositions. The normal chemical composition of kaolin fiber is in the following range,%: 43-54 A1203; 43-54 Si02; 0.6-1.8 Fe203; 0.1-3.5 Ti02; 0.1-1.0 CaO; 0.2-2.0 Na20 + K20; 0.08-1.2 B203.
Kaolin fibers are staple fibers and are hardened high-temperature glass. When kaolin fiber is heated above a certain temperature and in a wide temperature range for a long time, deflating, i.e. crystallization, occurs.
At the same time, the fibers lose their flexibility, elasticity and strength. For fibers with alumina content from 43 to 54%, the temperature of long-term use is 1260 ° C and the melting point is about 1780 ° C. An increase in the alumina content within 43-55% does not significantly affect the temperature and rate of glass transition. However, an increase in the alumina content to 60% leads to a lower degree of devitrification than the devitrification of fibers with a lower alumina content. (The economic efficiency of increasing the A1203 content above 55% has not yet been established.)
The addition of chromium oxides in an amount of 2-5% increases the viscosity of the glass, which delays the crystallization process and, as a consequence, increases the temperature of long-term use of kaolin wool to 1450 ° C. Additives of about 3% of zirconium dioxide contribute to obtaining a longer fiber. Various modifying additives are also used: Na20, B203, Fe203,
MgO, Ti02, MnOr - The scheme of kaolin wool production is presented below.
Fiber forming device
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