PROCESSES FOR EXTRACTING METAL VALUES FROM MANGANESE NODULES,申请号GB19760000418-传众专利搜索

PROCESSES FOR EXTRACTING METAL VALUES FROM MANGANESE NODULES

申请公布号：GB1530002(A)

申请号：GB19760000418

申请日期：1976.01.07

申请公布日期：1978.10.25

申请人：

KENNECOTT COPPER CORP

分类号：C22B1/24;C22B3/00;C22B3/04;C22B15/00;C22B23/00;C22B47/00;(IPC1-7):C22B1/24

主分类号：C22B1/24

摘要：1530002 Treating deep sea manganese nodules; metal recovery KENNECOTT COPPER CORP 7 Jan 1976 [10 Feb 1975] 418/76 Heading CIA In a process for extracting metal values from deep sea manganese nodules containing calcium montmorillonite wherein said nodules are reduced and subsequently leached, the nodules are pelletized prior to the reduction and leaching by effecting the following steps: (a) grinding the nodules; (b) base exchanging the calcium montmorillonite in the nodules with sodium ions; (c) agglomerating the ground nodules to form pellets. The source material for sodium ions may be mixed with the ground nodules prior to agglomeration or, alternatively, an aqueous solution containing Na<SP>+</SP> ions may be sprayed onto the ground nodules prior to the agglomeration step. Coking coal may be added to the nodule material prior to pelletizing to provide both a reducing agent and a coke bond to maintain the agglomerate shape during and after reduction. The coke produced during reduction also creates a more porous pellet, improving the leaching characteristics of the pellet.