What is the application of silica fume in insulation and insulation?
Aug 01, 2024
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Thermal insulation material is usually a material with small quality, loose, pores, and small heat conduction coefficients. When the average temperature is not greater than 623K (350 ° C), the heat -conducting coefficient should be less than 0.14W / (m • K). The heat flow rate generated by the insulation and thermal insulation material to prevent high temperature from transmission from high temperature to low temperature, isolation solar radiation and high temperature effects by slowing the heat flow rate generated by transmission, convection, and radiation.
Silica fume, also known as silicon ash and silicon powder, is a dust recovered from the flue gas smelted from alloy silicon or silicon iron. From dark brown to gray -white, the better the quality, the lighter the color.
The application of silica fume as the main raw material to prepare composite silicate thermal insulation materials has gradually become the application hotspot of current silica fume. Compound silicate insulation coatings are one of the current wide insulation coatings. It is a blocking insulation coating. It is a new high -efficiency energy -saving insulation coating with a micropore mesh structure (the wet state is gray -white sticky paste) Essence This type of insulation coatings initially used the loose sea bubblestone as the main raw material and the water glass as the main adhesive. Later, in addition to the sea bubbles, a large number of expansion of peak, expanded vermiculite, drifting beads, flour ash, silica fume, diatom soil, asbestos, glass wool, ore, aluminum fiber, etc. The agent has also developed from a single water glass to plaster (room temperature), cement (room temperature), high aluminum cement (medium temperature), silicon -soluble (high temperature) and other composite use. Among them, silica fume is an important source of silicon compounds. In addition, various external additives are added to improve the various properties of coatings, such as liquidity, sclerosis, water hate, high temperature resistance, and reflection. Made the process of mechanical pulp, foaming, mixing, etc. It is characterized by simple production process, can be applied, convenient for construction, and good thermal insulation layers. It is especially used in the insulation of pipeline accessories such as valves, flanges, three links, spheres, cone, rotation and other pipeline accessories and equipment.
