| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the treating capacity in the existing equipment even in the case of increasing a zinc leaching residue as the treating object by executing a concentrating process of float with plural sets of thickeners connected with a series in the case of extracting a lead concentrate through a lead floatation and the concentrating process of the float. SOLUTION: Tailing of copper floatation is supplied to the lead floatation, and a Pb-rich float is extracted. The Pb-rich float comes into a first float- thickener 5 and the overflow is fed to a second copper thickener at the copper side to obtain an under-flow pulp as the lead concentrate. The lead concentrate comes in a second floatation thickener 6 to obtain an under-flow pulp as an enriched lead concentrate. The enriched lead concentrate comes in a mixing thickener 7 together with lead source of a lead sulfate, lead slag, etc. as by- product in a smelting plant and the under-flow pulp is dehydrated with a filter press 8 to obtain the mixed lead sulfate. The lead sulfate is charged into a leas electric furnace after drying in order with rotary dryers 9, 10 connected with the series.</p> |
