| 摘要 |
<p>PURPOSE:To eliminate the pollution at low cost by kneading the dust generated in steel making and contg. harmful heavy metals, etc. with a carbonaceous fuel to form a briquette, and burning the briquette in a combustion box with a vent at the bottom under specified conditions to reduce and volatilize the metals. CONSTITUTION:A carbonaceous fuel such as coke powder is added to dust and sludge contg. harmful heavy metals, etc. and generated in a steel making operation, and the mixture is kneaded to form a briquette 4, which is packed into a combustion box body 1 equipped with a bottom surface part 2 and a partition plate 3 in 200-600mm. thickness. The box body 1 is placed on slag 14 wherein dust is already charged, and burnt with the sensible heat of the slag under natural ventilation. The harmful heavy metals are reduced and volatilized, and recovered. The briquette 4 from which a part of the heavy metals is removed is transferred into a hopper 8, charged into molten slag 12 discharged from a steel-making furnace 10 while keeping the briquette at high temps., agitated by the bubbling 13 of a high-pressure gas, and completely slagged into the molten slag.</p> |
