| 摘要 |
<p>Method of preparing a melt for the production of mineral wool wherein suitably composed raw material and coke are fed into a preheating zone in the upper portion of a shaft furnace and are caused to descend down through the oxidation zone in which air is introduced to effect a combustion of the coke and to heat the raw material to a temperature not exceeding 1000°C, and wherein the actual melting is effected by plasma heating in the lower portion of the shaft furnace where which the melt formed is discharged.</p> |
