There are many kinds of materials, how are refractory materials classified as heat insulation materials ? Generally, it can be classified according to material, temperature, shape and structure. According to the material, it can be divided into three types: there are materials, non-polar insulation materials and metal materials.
Insulation materials for thermal equipment and pipelines: This type of material has the characteristics of decay, non-combustion, and high temperature resistance. For example: asbestos, diatomaceous earth, perlite, glass fiber, foam glass concrete, calcium silicate board, etc.
In general cold insulation materials, organic heat insulation materials are mostly used. This type of material has the characteristics of extremely small thermal conductivity, low temperature resistance, and flammability. For example: Polyurethane, dance vinyl foam, urethane foam, cork, etc.
According to the form, it can be divided into porous thermal insulation materials, fibrous thermal insulation materials, powder thermal insulation and layered thermal insulation materials, which are light, good thermal insulation performance, good elasticity, foam plastic, foam glass, foam rubber, calcium silicate , Lightweight refractory materials, etc. Fibrous thermal insulation materials can be divided into organic fibers, inorganic fibers, metal fibers and composite fibers according to their materials. In the industry, inorganic fibers are mainly used as thermal insulation materials. At present, the most widely used fibers are asbestos, rock wool, glass wool, aluminum silicate ceramic fibers, and crystalline oxidized thermal materials mainly include diatomaceous earth and expanded pearls. Rock and its products. These materials have rich sources of raw materials and low prices. They are highly efficient thermal insulation materials widely used in construction and thermal equipment. details as follows.
Foam-type insulation material. Foam insulation materials mainly include two categories: polymer foam insulation materials and foam asbestos insulation materials. Polymer foam insulation materials have the advantages of low absorption rate, stable insulation effect, low thermal conductivity, no dust flying during construction, and easy construction. They are in the period of popularization and application. Foamed asbestos thermal insulation material also has the characteristics of low density, good thermal insulation performance and convenient construction. The popularization of sodium is stable, and the application effect is also good. But at the same time, the socks are easy to be damp, easy to dissolve in water, have a small elastic recovery coefficient, and cannot be used in the part of the wall pipe and the flame.
Composite silicate insulation material. Composite silicate insulation material has the characteristics of strong plasticity, low thermal conductivity, high temperature resistance, and small drying shrinkage of slurry. The main types are magnesium silicate, silicon-magnesium-aluminum, and rare earth composite insulation materials. In recent years, the sepiolite thermal insulation material, as the leader of the composite silicate thermal insulation material, has caused the second market competitiveness and broad market competitiveness of the construction industry due to its good thermal insulation performance and application effect. market expectation. The sepiolite thermal insulation material is made of special non-metallic mineral-sepiolite as the main raw material, supplemented by a variety of metamorphic mineral raw materials, adding additives, and using a new process to foam composite surface. The material is non-toxic and tasteless, and is a gray-white electrostatic inorganic paste, which is a gray-white closed network structure after being dried and formed. Its notable features are low thermal conductivity, wide temperature range, anti-aging, acid and alkali resistance, light weight, sound insulation, flame retardant, simple construction, and low overall cost. Mainly used for thermal insulation of building roofs and indoor ceilings at room temperature, as well as thermal equipment of petroleum, chemical, electric power, smelting, transportation, light industry and national defense industries, pipeline thermal insulation and chimney inner wall, furnace shell Insulation (cold) engineering. Warm insulation materials will enable a new situation.
Calcium silicate thermal insulation product thermal insulation material. Calcium silicate thermal insulation product thermal insulation material was once recognized as a better kind of block hard thermal insulation material in the 1980s. It is characterized by low density, high heat resistance, low thermal conductivity, pressure resistance, and shrinkage. small. However, since the 1990s, its promotion and use have seen a low tide. Many manufacturers use pulp fiber. Although the above method solves the asbestos-free problem, the pulp fiber is not resistant to high temperature, which affects the high temperature resistance of the insulation material and increases the bong. When the low-temperature material is used in low-temperature parts, the performance of the heat-insulating material is not economical.
Fiber insulation material. The global share of fibrous thermal insulation materials is due to its excellent ability to harmonize, and is mainly used for thermal insulation for body dwellings. However, due to the large investment, there are not many manufacturers, which restricts its promotion and use, so the market share at this stage is relatively low.
The above information is related to the classification of heat insulation materials and refractory materials introduced by professional fire protection board companies. The article comes from goldenpower Group http://www.goldenpowerjc.com/. Please indicate the source for reprinting.
Post time: Dec-02-2021
