Title:
PRODUCTION OF HIGH-PURITY ZINC AND PRODUCTION DEVICE
Document Type and Number:
Japanese Patent JP3838713
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method and device for directly producing high-purity zinc of ≥99.9999wt.% purity (6N) in the form of an ingot by developing a new refining means by which the iron, silver, lead, etc., which have been difficult to separate completely from zinc by the conventional technique are separated.
SOLUTION: The electrolytic zinc of 99.99% purity is put in a raw material crucible 5, fixed on a suction stand 9 set in the center of a recovery mold 6 and introduced into an electric furnace 1. The crucible 5 and recovery mold 6 are doubly sealed by the outer cylinder 3 and inner cylinder 4. The inside of the inner cylinder 4 is kept at 1×10-2Torr by an evacuating device 2, the furnace is heated to 450°C, and hence the zinc in the raw material is vaporized, then condensed on the inner face of the inner cylinder, granulated and dropped into the recovery mold. The granulated zinc is recovered to obtain zinc of ≥6N. The material having a lower vapor pressure than zinc remains in the crucible, and the material having a higher vapor pressure is exhausted as the gas, sucked into a cooling trap 8, cooled by a water-cooled flange 7 and solidified.
Inventors:
Kashio Tayama
Yamauchi Hajime
Yamauchi Hajime
Application Number:
JP29443296A
Publication Date:
October 25, 2006
Filing Date:
October 16, 1996
Export Citation:
Assignee:
DOWA MINING CO.,LTD.
International Classes:
C22B19/12; (IPC1-7): C22B19/12
Domestic Patent References:
| JP7154035A | ||||
| JP42002801B1 | ||||
| JP42004122B1 | ||||
| JP10121162A | ||||
| JP9256083A |
Attorney, Agent or Firm:
Kenji Wada
Komatsu Taka
Koji Hagiwara
Komatsu Taka
Koji Hagiwara
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