Title:
ニッケル含有廃液スラッジからの硫酸ニッケルの回収方法
Document Type and Number:
Japanese Patent JP4216657
Kind Code:
B2
Abstract:
To provide a method for recovering a nickel salt that is capable of recovering nickel in a high yield of approximately to 100% from nickel-containing waste solution sludge, treating with small consumption energy and reducing the exhaust amount of waste to environment such as reclamation, an aqueous area and the like to zero.
The method comprises dissolving a solid content by adding an acid to the nickel-containing waste solution sludge, then adding calcium carbonate thereto and removing iron-containing gypsum by adjusting the pH and performing filtration after oxidizing Fe2+among the iron content (Fe3+, Fe2+) to Fe3+to form a nickel stock solution. Then, calcium hydroxide is added to the nickel stock solution to adjust the pH to form nickel-containing gypsum and the chlorine content is discharged to the outside of system. The method for recovering the nickel salt from the nickel-containing sludge is characterized by adding an acid to the nickel-containing gypsum to dissolve nickel hydroxide, recovering the nickel salt crystal by performing the cooling crystallization treatment to crystallize and performing the circulation treatment of the residual solution after the crystallization of the nickel salt crystal.
COPYRIGHT: (C)2005,JPO&NCIPI
Inventors:
Atsushi Eba
Nobuo Kusakabe
Nagashima Masatake
Yoshino Hiroshi
Application Number:
JP2003181997A
Publication Date:
January 28, 2009
Filing Date:
June 26, 2003
Assignee:
Nippon Steel Corporation
Astec Co., Ltd.
International Classes:
B01D9/02; C01G53/00; C01G53/10; C02F11/00; C22B3/44; C22B7/00; C22B23/00
Domestic Patent References:
| JP58135138A | | | | |
| JP58079830A | | | | |
| JP59056590A | | | | |
| JP50024197A | | | | |
| JP51105915A | | | | |
| JP10060552A | | | | |
| JP2000199018A | | | | |
| JP2001253719A | | | | |
| JP2000054040A | | | | |
Attorney, Agent or Firm:
Etsuichi Matsumoto
Shiina Akira
