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Title:
PLACER GOLD MINING METHOD, PLACER GOLD MINING BOAT USED IN THIS METHOD, PLACER GOLD DIGGING AND SEPARATING METHOD AND SYSTEM THEREFOR, AND PLACER GOLD SEPARATING METHOD AND SYSTEM THEREFOR
Document Type and Number:
WIPO Patent Application WO/1999/010625
Kind Code:
A1
Abstract:
A placer gold separating method comprising subjecting placer gold- and gold ore-containing sand and gravel layers accumulated on the bottom of the water of a river and placer gold- and gold ore-containing sand and gravel layers formed deep in the ground to excavation or suction excavation by utilizing a water pressure difference, causing a mixture of the excavated or suction excavated placer gold- and gold ore-containing sand, gravel and water to flow horizontally by the action of a pressure fluid, and separating the placer gold and gold ores by utilizing a specific gravity difference while the mixture is flowing; and a system for this method. A placer gold mining boat used to practice this method and provided thereon with a combination of a suction excavation means, a mixture transfer means, a means for separating placer gold by utilizing a specific gravity difference, and a means for discarding the remaining mixture from which the placer gold has been separated. A placer gold separating method characterized by causing a mixture of placer gold and gold ores or pulverized gold ores and water to flow in a metallic cylinder, generating a magnetic field by a magnetic field generating means provided on an outer circumferential surface of the metallic cylinder, and magnetically depositing the placer gold in the mixture on the inner surface of the metallic cylinder, whereby the placer gold is separated.

Inventors:
Matsufuji, Tamisuke (Jipangu Inc. 14-11, Azabujuban 2-chome Minato-ku Tokyo, 106-0045, JP)
Seki, Shigetsugu (1755-107, Miyanogicho Inage-ku Chiba-shi Chiba, 263-0054, JP)
Kojima, Haruo (970-6, Izumichoootomi Toki-shi Gifu, 509-5132, JP)
Application Number:
PCT/JP1998/003781
Publication Date:
March 04, 1999
Filing Date:
August 26, 1998
Export Citation:
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Assignee:
JIPANGU INC. (14-11, Azabujuban 2-chome Minato-ku Tokyo, 106-0045, JP)
Matsufuji, Tamisuke (Jipangu Inc. 14-11, Azabujuban 2-chome Minato-ku Tokyo, 106-0045, JP)
Seki, Shigetsugu (1755-107, Miyanogicho Inage-ku Chiba-shi Chiba, 263-0054, JP)
Kojima, Haruo (970-6, Izumichoootomi Toki-shi Gifu, 509-5132, JP)
International Classes:
B03B5/60; B03B9/00; B03C1/14; C22B7/00; C22B11/00; E02F3/88; E02F3/90; E02F3/92; E02F7/00; (IPC1-7): E21C50/00
Foreign References:
JP15000929Y1
JP14012903Y1
JPS5711254B2
JPS376316Y1
JP102341C1
Attorney, Agent or Firm:
Suzuki, Shoji (Nihonseimeiyotsuya Building 6th floor 16-2, Samoncho Shinjuku-ku Tokyo, 160-0017, JP)
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