Title:
PLACER GOLD DIGGING AND SORTING METHOD AND DIGGING AND SORTING SYSTEM
Document Type and Number:
Japanese Patent JPH1157527
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To automatically separate placer gold, sand, etc., by sucking a mixture of the sand contg. placer gold and water, accelerating the mixture by a fluid jet and applying gravity concentration to the flowing mixture. SOLUTION: When a flow is generated in a transfer pipe 4 as shown by the arrow 13, an upward flow is also generated in a sand lifting pipe 2 through a connecting pipe 8 as shown by the arrow 14. When the flow at a speed of 3 m/sec is generated in the transfer pipe 4, a flow at the same speed is generated in the sand lifting pipe 2, and the sand and water are sucked from the lower end of the pipe 2 in the amt. corresponding to the flow rate. Separation boxes 5, 6 and 7 are connected in series at regular intervals in the transfer pipe 4. Since the cross-sectional area in the boxes 5, 6 and 7 is larger than that of the transfer pipe 11, the flow velocity is lowered in proportion to the cross-sectional area, and sand, etc., are deprived of buoyancy. Consequently, the placer gold high in sp.gr. are settled first, and the materials higher in sp.gr. are successively settled and separated.
Inventors:
MATSUFUJI TAMISUKE
Application Number:
JP23133297A
Publication Date:
March 02, 1999
Filing Date:
August 27, 1997
Export Citation:
Assignee:
JIPANGU KK
International Classes:
B03B5/62; B03B5/60; B03B9/00; B03B11/00; B03C1/14; C22B7/00; C22B11/00; E02F3/88; E02F3/90; E02F3/92; E02F3/94; E02F7/00; (IPC1-7): B03B5/62; B03B11/00
Attorney, Agent or Firm:
Shoji Suzuki (1 person outside)