| 摘要 |
<p>1516242 Recovering metal values METALLURGIE HOBOKEN-OVERPELT 8 March 1977 02555/78 Divided out of 1516241 Heading C1A Metal values are extracted from ocean floor nodules containing Mn and at least one of Ni, Co, Mo, V, Fe, Al, Cu and Zn by (a) treating the ore with HCl to produce Cl 2 , metal chloride solution and solid residue; (b) separating the solid from the solution; (c) separating substantially all the above metal values from the solution except Mn; (d) treating the Mn-containing solution with Cl 2 while maintaining pH above 0À5 by addition of MgO or Mg(OH) 2 , at least the major part of the Mn being pptd. at pH between 3 and 7 as MnO (1+x) where x is between 0À5 and 0À7; (e) separating the MnO (1+x) from the resulting MgCl 2 solution; (f) pyrohydrolysing this MgCl 2 solution in atomized state to regenerate MgO and HCl and (g) recycling the HCl to step (a) and the MgO to step (d). Procedures are described for effecting separation step (c) and for further processing of the separated metal values to obtain Al and Fe oxides, Cu, Co, Ni sulphides, Cu and Zn sulphates and Zn, Ni, Co, Mo and V chlorides.</p> |
