| 摘要 |
<p>Apparatus comprises a container divided into three interconnected chambers 11, 12, 13 situated one below the other, 11 being an inlet chamber, 13 being a mixing chamber and 12 being a settlement chamber, the inlet chamber having an inlet for material to be treated, a duct 19 from 11 down into 13, at least one transfer duct 25 from 13 up into 12, said duct 25 or ducts extending below the upper extent of that mixing chamber, a gas collection zone 27 at the upper extent of 13, at least one recirculation duct 23 from the base of 12 down into the mixing chamber, a further gas collection zone in the upper extent of 12 and an outlet from the settlement chamber situated below the said further gas collection zone. <IMAGE></p> |
