SETTLING SEPARATION PROCESS FOR NUETRALIZED SLURRY AND HYDROMETALLURGICAL PROCESS FOR NICKEL OXIDE ORE
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United States of America Patent
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Nov 5, 2015
app pub date -
Jul 29, 2013
filing date -
Nov 20, 2012
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Abstract
An object of the present invention is to provide a settling separation process for a neutralized slurry in which a neutralization step is efficiently performed for a leachate obtained by the leaching of nickel and cobalt from a nickel oxide ore, and further a neutralized precipitate obtained by precipitation of impurity components can effectively be separated and removed while inhibiting the filtration failure; and to provide a hydrometallurgical process for a nickel oxide ore, in which the above process is applied. In the present invention, a neutralization step is performed by using a magnesium oxide for a leachate obtained by the leaching of nickel and cobalt from a nickel oxide ore to obtain a neutralized slurry, and a neutralized precipitate is separated and removed by the addition of a cationic flocculant into the neutralized slurry.
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