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Patent Searching and Data


Title:
PROCESS FOR PRODUCTION OF ORE SLURRY
Document Type and Number:
WIPO Patent Application WO/2012/102265
Kind Code:
A1
Abstract:
Provided is a process for producing an ore slurry which has low yield stress to an extent that the ore slurry can be transferred even when the concentration of the ore slurry is high and which does not undergo any problem associated with transfer. A process for producing an ore slurry, in which a pulverization/classification step and an ore slurry concentration step are included in the collection of nickel and cobalt from a nickel oxide ore by a high-temperature high-pressure acid leach method using sulfuric acid, wherein the process is characterized in that, in the slurry concentration step, a dilution solution of a coagulant that fulfills the following requirements: (A) the molecular weight of the coagulant: 8-20×106; and (B) the dilution ratio of the coagulant: 0.1-0.5 g/L, is used as a coagulant solution, the coagulant solution in such an amount that the amount of the coagulant to be added becomes 50-150 g per ton of the dried solid content in the ore slurry is added to the ore slurry and the coagulant solution is allowed to contact with the ore slurry for a satisfactory period, and is also characterized in that the temperature of the slurry is kept at 35-45˚C during the transfer of the slurry from the concentration step to the subsequent step.

Inventors:
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)
Application Number:
PCT/JP2012/051428
Publication Date:
August 02, 2012
Filing Date:
January 24, 2012
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO (JP)
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)
International Classes:
C22B23/00; C22B3/04
Foreign References:
JP2002339020A2002-11-27
JP2008189999A2008-08-21
JPH11124640A1999-05-11
JP2005350766A2005-12-22
JP2006525104A2006-11-09
JPH1180850A1999-03-26
JP2005350766A2005-12-22
JP2009173967A2009-08-06
JPH11124640A1999-05-11
Other References:
See also references of EP 2669392A4
Attorney, Agent or Firm:
OSHIDA Yoshitaka (JP)
Yoshitaka Oshida (JP)
Download PDF:
Claims: