| 摘要 |
<p>PCT No. PCT/FI88/00064 Sec. 371 Date Dec. 28, 1989 Sec. 102(e) Date Dec. 28, 1989 PCT Filed Apr. 28, 1988 PCT Pub. No. WO88/08411 PCT Pub. Date Nov. 3, 1988.A furnace for producing a melt for mineral wool production includes a shaft for preheating and melting of the raw material. A water-cooled grate is disposed in the bottom portion of the shaft, which supports a bed of ceramic filling bodies as well as the raw material. A combustion chamber is disposed underneath the shaft, which has a bottom portion for collecting the melt dripping from the shaft and an outlet for melt tapping. At least one main burner is disposed in the combustion chamber. Auxiliary burners are disposed above the grate. The bottom surface of the combustion chamber is larger, preferably 20 to 400% larger, than the transverse cross-sectional area of the shaft.</p> |
