LIQUID-STORAGE DEVICE AND PRESSURE-CONTROL METHOD THEREOF

Title:

LIQUID-STORAGE DEVICE AND PRESSURE-CONTROL METHOD THEREOF

Document Type and Number:

WIPO Patent Application WO/2011/132693

Kind Code:

A1

Abstract:

By means of installation improvements specifically in a liquid-storage tank from among sulfidation installations at which a sulfidation reaction is performed in the hydrometallurgy of nickel oxide ore, the present disclosures reduce the amount of hydrogen sulfide gas used in a sulfidation step and the amount of alkali used in exhaust gas treatment, reducing operating costs. Disclosed is a liquid-storage device, which is used in a sulfidation installation that generates sulfides by causing the sulfidation of a sulfate solution, and which is provided with: a plurality of liquid-storage tanks (11n) that store a slurry or a filtrate after solid-liquid separation; a collecting pipe (12) that collects exhaust gas from each liquid-storage tank (11n) or inert gas that goes towards each liquid-storage tank (11n); and pressure-control pipework (13) that controls the internal pressure of the plurality of liquid-storage tanks (11n) by allowing the flow-through of inert gas and exhaust gas. Also, the pressure-control pipework (13) joins with the collecting pipe (12) via a joining section (30) and is provided with a pair of pressure-control valves (31, 32) that sandwich before and after the joining section (30) that joins to the collecting pipe (12).

Inventors:

MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)
ASATORI MORITAROU (JP)

Application Number:

PCT/JP2011/059682

Publication Date:

October 27, 2011

Filing Date:

April 20, 2011

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)
ASATORI MORITAROU (JP)

International Classes:

C22B23/00; C22B3/04; C22B3/44

Foreign References:

JP2010031341A	2010-02-12
JP2010059489A	2010-03-18
JP2010031302A	2010-02-12
JP2010098772A	2010-04-30

Other References: