METHOD AND APPARATUS FOR FEEDING ULTRA-FINE POWDER IN CONSTANT-QUANTITY BATCH

Title:

METHOD AND APPARATUS FOR FEEDING ULTRA-FINE POWDER IN CONSTANT-QUANTITY BATCH

Document Type and Number:

WIPO Patent Application WO/1993/021092

Kind Code:

A1

Abstract:

Ultra-fine powder is stored inside an air transportation tank (20), and compressed air is supplied from an air inlet (24) for fluidization so as to fluidize ultra-fine powder and to discharge it into a transportation piping (23). Ultra-fine powder is sent by transportation air to a meeting tank (30) at the other end of the transportation piping (23) and the weight of the transported powder is measured by a load cell (31). After the measurement has reached 90 % of a predetermined measurement, the feed quantity of transportation air is reduced and a bypass regulating valve (38) is regulated to carry out transporation at a reduced speed. When the measurement reaches 100 %, discharge to the transportation piping (23) is stopped. This method and apparatus can provide storage, constant-quantity batch transportation and automatic measurement of ultra-fine powder such as silica fume.

Inventors:

OURA TETSUO (JP)
SATO MITSUO (JP)
SAITO YASUYUKI (JP)
MASE KEN-ICHI (JP)
KITAZAWA KENZO (JP)
AOYAGI HAYAO (JP)
OKUNO TORU (JP)
YONEZAWA TOSHIO (JP)
MITSUI KENRO (JP)

Application Number:

PCT/JP1993/000382

Publication Date:

October 28, 1993

Filing Date:

March 29, 1993

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP (JP)
TAKENAKA CORP (JP)
KEIHIN RYOKO CONCRETE INDUSTRY (JP)
OURA TETSUO (JP)
SATO MITSUO (JP)
SAITO YASUYUKI (JP)
MASE KEN ICHI (JP)
KITAZAWA KENZO (JP)
AOYAGI HAYAO (JP)
OKUNO TORU (JP)
YONEZAWA TOSHIO (JP)
MITSUI KENRO (JP)

International Classes:

B65G53/16; B01F15/02; B01F15/04; B65G53/66; C04B18/14; G01G13/10; B01F3/18; (IPC1-7): B65G53/66

Foreign References:

JPS61295925A	1986-12-26
JPS54129684A	1979-10-08
JPS4839332Y1	1973-11-19

Other References: