Performance Optimization Of Insulation Board From Blast Furnace Slag Fiber

Mineral cotton plate with phenolic resin as the binder will release small molecules currently, such as formaldehyde, which can cause serious environmental pollution, and it also can affect human body health. After a period of time, mineral fiber board can absorb the moisture in the environment. On the one hand, it will increase the bulk density of fiber board, on the other hand, the thermal conductivity of fiberboard, sound insulation effect and mechanical performance will be reduced after moisture absorption. Therefore,to explore new type of environmental protection adhesive and to solve hygroscopicity of the fiberboard is another priority on fiberboard production at present.This experiment uses molten blast furnace slag as raw material, and uses blowing method for slag cotton fiber. Fiber mean diameter from 3.8 to 4.8 mum, and slag ball average content is from 0.57% to 2.06%.Comparing polyvinyl alcohol silicon sol system, system of PVA-GA and polyvinyl alcohol silica and silane system with phenolic resin binder system to detect the performance of fiberboard, and finally get the optimal performance insulation board.PVA-silicasol system applied to 1.15 acidity slag wool in bulk density and moisture absorption rate was the best and conformed to the national standard requirements; the density of fiber board which made by PVA-GA binder system with 1.20 acidity slag was128.19 kg/m3, which was the most closet to phenolic resin insulation products, the fiber moisture absorption rate worked on 1.15 slag cotton was the lowest. After adding silane abhorred agent, PVA-silane-silicon sol system and PVA-GA-silane system products hygroscopic rate can reach 0.29% and 0.19% which was superior to the factory production line.Using scan electron microscope and XRD observed surface morphology and analysised corrosion mechanism of products which corroded by acid-base corrosion. The fiber products could resistance alkali corrosion, especially the system of PVA-GA binder was not affected by the acid and alkali erosion for a long time.