| 摘要 |
<p>Lead is recovered from the lead-containing sludge from used batteries by first heating the sludge at 100 DEG - 150 DEG C to drive off the water. The sludge is subsequently reacted at about 1,000 DEG C with carbon powder in a closed electric furnace. The relatively small volume of water-free waste gas produced leads to a marked saving in energy. Not only dust but also the SO2 can be removed simply from the waste gases.</p> |
