| 摘要 |
<p>An off-gas channel (1) of a closed-type smelting furnace (2), the off-gas channel (1) comprising a first end (3) opening to the upper part of the smelting furnace (2) and a second end (4) opening to a gas cleaning apparatus (5) for leading the furnace off-gases to the gas cleaning apparatus. The off-gas channel com prises at least one cleaning nozzle (6, 7, 8, 9) adapted to spray pressurized fluid to the inner surface of the off-gas channel.</p> |
