Title:
銅電解殿物の処理方法
Document Type and Number:
Japanese Patent JP3616314
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a wet treatment process of copper anode slime, by which a platinum group/gold can be efficiently separated from selenium/tellurium and simultaneously selenium and tellurium can also be efficiently separated from each other and recovered. SOLUTION: The anode slime is passed through a copper removal step, a wet chlorination step and a gold extraction step to undergo preliminary treatment. Gaseous sulfur dioxide diluted with air to 8-12% concentration is blown, in an amount 8 to 15 times the molar concentration of platinum metals/gold, into the resultant liquid after gold extraction at 60-90 deg.C while maintaining chlorine ion concentration in the liquid at <=1.5 mol/l, by which the platinum metals/gold remaining in the liquid can be separated from the selenium/tellurium and a reduced substrate containing platinum metals/gold can be obtained. Successively, gaseous sulfur dioxide is blown, in an amount twice the molar concentration of the selenium or below, into the liquid after separation of platinum metals/gold at 60-90 deg.C while maintaining chlorine ion concentration in the liquid at <=2.0 moles and also maintaining selenium concentration in the liquid at >=3 g/l, by which the selenium can be separated from the tellurium and a selenium-containing reduced substance can be obtained. Further, gaseous sulfur dioxide is blown into the liquid after selenium separation at 60-90 deg.C to obtain a tellurium-containing reduced substance.
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Inventors:
Yoshifumi Abe
Kazuaki Takebayashi
Kazuaki Takebayashi
Application Number:
JP2000212633A
Publication Date:
February 02, 2005
Filing Date:
July 13, 2000
Export Citation:
Assignee:
Nikko Metal Co., Ltd.
International Classes:
C22B11/06; C22B3/26; C22B7/00; C22B11/00; (IPC1-7): C22B11/06; C22B3/26; C22B7/00; C22B11/00
Domestic Patent References:
| JP57092147A | ||||
| JP56003630A | ||||
| JP60208435A | ||||
| JP61223139A | ||||
| JP59137307A | ||||
| JP5773139A |
Attorney, Agent or Firm:
Motohiro Kurauchi
Hiroshi Kazama
Hiroshi Kazama