| 摘要 |
<p>PURPOSE:To utilize energy of slag of steel making for efficient treatment of dust, etc. by calcining the dust and sludge, charging the same into the slag, blowing a bubbling gas thereto to accelerate reaction and recovering volatile metallic components. CONSTITUTION:Dust and sludge are made into a lumped material having a desired shape by a pelletizer 1 or briquetting machine 2 and is put into a hopper 3. Such material is charged by a belt conveyor 5 into a calcination furnace 4 and is calcined then a damper 7 is opened and a dust collector 6 is operated. The calcined material is dropped into a hopper 8 and if necessary, the calcined material is charged together with a reaction accelerator in common use as an agent for preventing collape from a hopper 13 into the slag of steel making contained in a slag ladle 10 in a hermetic chamber 11. The bubbling gas adjusted in flow rate and pressure in a control device 12 is blown to the mixture composed of the slag and the calcined material to stir said mixture. The volatile metallic components such as Zn, Pb, etc. generated by such stirring are collected into a cyclone and the dust collector 6 via a damper 14.</p> |
