| 摘要 |
PCT No. PCT/HU86/00028 Sec. 371 Date Jun. 15, 1987 Sec. 102(e) Date Jun. 15, 1987 PCT Filed May 8, 1986 PCT Pub. No. WO86/06713 PCT Pub. Date Nov. 20, 1986.A closed gas-cell cellular material is formed by heat treating a hydrosilicate, especially perlite, at a low temperature and then in the form of grains of a grain size of 5 to 8000 micrometers, feeding these grains through a space at a temperature of 800 DEG C. to 2000 DEG C. for a short residence time at a uniform space load of 0.1 to 500 kg/h. Then the grains are subjected to thermal shock in a thermal shock space connector directly to the feed spacing and heated to 1,000 DEG C. to 3,500 DEG C. The density of the granular material thus produced is 0.12 to 27 g/cm3 and the weight per volume thereof at 0.01 to 1 kg/liter. |
