AUTOCLAVE APPARATUS USED DURING HIGH-PRESSURE ACID LEACHING PROCESS

Title:

AUTOCLAVE APPARATUS USED DURING HIGH-PRESSURE ACID LEACHING PROCESS

Document Type and Number:

WIPO Patent Application WO/2013/191020

Kind Code:

A1

Abstract:

The purpose of the present invention is to facilitate mixing of a raw material slurry with a sulfuric acid during a high-pressure acid leaching process in order to reduce a management value of a discharged free fluoric acid concentration. This autoclave apparatus (100) is to be used during a high-pressure acid leaching process wherein the leaching progresses by agitating a raw material slurry and a fluoric acid, which have been heated and pressurized, by using agitators (30A, 30B, … 30G) that are installed inside multiple compartments (20A, 20B, … 20G) of an autoclave body (110), which has been compartmentalized with partitions (10A, 10B, … 10F), and the slurry is transferred from upstream compartments to downstream compartments so that the leaching progresses in sequence. The partitions (10A, 10B, … 10F) are respectively provided with a slurry transfer flow port (52A, 52B, … 52F) that can be opened/closed by means of a slurry transfer flow port door. The slurry transfer flow ports (52A, 52B, … 52F) are positioned such that the heights between the lowest part of the autoclave and the centroids of the slurry transfer flow port doors are 0.1 - 0.3 times the diameter of the autoclave and the distances between central lines of the partitions and the centroids of the slurry transfer flow port doors are 0.05 - 0.25 times the diameter of the autoclave, and are shaped so as not to reach an edge of any partition.

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Inventors:

MATSUBARA SATOSHI (JP)
NAKAI OSAMU (JP)
KYOUDA YOUJI (JP)
SAKAMOTO TAKASHI (JP)
ISHIKAWA HARUO (JP)
MAKI KOICHIRO (JP)

Application Number:

PCT/JP2013/065959

Publication Date:

December 27, 2013

Filing Date:

June 10, 2013

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)
MATSUBARA SATOSHI (JP)
NAKAI OSAMU (JP)
KYOUDA YOUJI (JP)
SAKAMOTO TAKASHI (JP)
ISHIKAWA HARUO (JP)
MAKI KOICHIRO (JP)

International Classes:

C22B23/00; B01D11/02; B01F27/91; B01J3/02; C22B3/04

Foreign References:

JP2011241446A	2011-12-01
JP2009530077A	2009-08-27
JP2005350766A	2005-12-22
JP2003082420A	2003-03-19
JPH0784623B2	1995-09-13
JP2009515044A	2009-04-09

Other References: