DRY TYPE GRINDING DEVICE AND DRY TYPE GRINDING METHOD

WIPO Patent Application WO/2004/035216

A1

A dry type grinding device comprising a grinding means (20) for dry-grinding a grinding subject material (10), a classification means (30) for classifying a ground material (21) obtained by the grinding means (20) into a fine powder (31) whose mean particle diameter is relatively small and a coarse powder (32) whose mean particle diameter is relatively large, a second classification means (50) for classifying the coarse powder (32) obtained by the first classification means (30) into a fine powder (51) whose mean particle diameter is relatively small and a coarse powder (52) whose mean particle diameter is relatively large, and a circulation means (70) for circulating the coarse powder (52), obtained by the second classification means (50), through the grinding means (20). Thereby, a product having a desired mean particle diameter can be efficiently obtained.

Tomikawa, Shinichiro c/o Showa Denko K.K. (Shiojiri Plant 1, Oaza Sog, Shiojiri-shi Nagano, 399-6461, JP)
Miyazawa, Hirokazu c/o Showa Denko K.K. (Shiojiri Plant 1, Oaza Sog, Shiojiri-shi Nagano, 399-6461, JP)

PCT/JP2003/013272

April 29, 2004

October 16, 2003

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SHOWA DENKO K.K. (13-9, Shiba Daimon 1-chome Minato-ku, Tokyo, 105-8518, JP)

B02C23/08; B02C23/14; B07B1/00; B07B7/00; B07B9/00; B07B9/02; B02C23/00; B07B1/00; B07B7/00; B07B9/00; (IPC1-7): B02C23/08; B02C17/00; B03C1/00; B07B1/00; B07B7/00; B07B9/00

Shiga, Masatake (2-3-1, Yaesu Chuo-ku, Tokyo, 104-8453, JP)

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