| 摘要 |
Waste paper or the like wood cellulose material is shredded if necessary into particles in the size range of about 3 mm to 10 mm, aqueous sodium silicate is applied to said particles, an aqueous solution of calcium chloride is then applied to the particles, and the wetted particles rapidly dried by quickly heating said wetted paper particles to a temperature in the range of about 730 DEG to 920 DEG C whereby trapped moisture is converted to steam to foam or intumesce the silicate composition into porous and permeable granules. The paper preferably is shredded to particles in the size of about 6 mm, the aqueous solutions applied by spraying, and the paper particles preferably are quickly heated to a temperature of about 850 DEG C within about 10 to 15 minutes. |
