Preparation method of zero-VOC floating bead smoke prevention and exhaust air pipe material suitable for electronic clean workshop

Abstract

The invention discloses a preparation method of a zero-VOC floating bead smoke prevention and exhaust branch pipe material prepared from high-alumina fly ash. The preparation method comprises the following steps: using high-alumina fly ash as a main raw material, mixing with Portland cement, uniformly mixing with water, pulping, and injecting into a dynamic reaction kettle to perform hydrothermalsynthesis reaction; after the reaction, adding an additive, glass fibers and an inorganic adhesive, and sequentially carrying out compression molding and air drying treatment to obtain the zero-VOC floating bead smoke prevention and exhaust air pipe material. A large amount of high-alumina fly ash is adopted as a main raw material, the high-alumina fly ash belongs to an inorganic material and doesnot contain VOC, and floating beads extracted from the high-alumina fly ash are micro-droplets formed by melting clayey substances when pulverized coal is combusted in a power plant boiler and spin at a high speed under the action of hot air of turbulent flow in the boiler so that a full-circle silicon-aluminum sphere is formed. Gas such as nitrogen, hydrogen, carbon dioxide and the like generated by combustion and cracking reaction is quickly expanded in the molten high-temperature silicon-aluminum spheres to form hollow glass bubbles under the action of surface tension, and then the hollowglass bubbles enter a flue to be quickly cooled and hardened to form high-vacuum glassy hollow microspheres. The material has the advantages of obvious environmental protection, zero VOC and excellentfireproof and heat-insulating properties, the fireproof grade is A1 grade, the heat conductivity coefficient is 0.045 (W / (m.k)), and the material can be widely applied to smoke prevention and exhaustduct core materials of electronic clean workshops.

Description

technical field [0001] The invention relates to the field of preparation of inorganic thermal insulation materials, in particular to a preparation method of a zero-VOC floating bead anti-smoke exhaust pipe material made of high-alumina fly ash, and the obtained product is a kind of material that can be widely used in electronic cleaning The core material of the smoke exhaust duct of the factory building. Background technique [0002] 1. VOC is the English abbreviation of volatile organic compounds (volatile organic compounds). VOC in the general sense is command volatile organic compounds. However, the definition in the sense of environmental protection refers to a type of active volatile organic compounds, that is, the type of volatile organic compounds that will cause harm. These volatile organic compounds include formaldehyde, ammonia, ethylene glycol, esters and other substances. VOC will also have a certain impact on the accuracy of some precision electronic instrume...

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Problems solved by technology

Increase the cost of material transportation and the difficulty of on-site duct installation

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