A method and apparatus for fine grinding materials normally difficult to grind at ambient temperature, e.g. plastic and elastomeric materials in a fluid classification type impact mill utilizing liquid cryogen to pre-cool the material to be ground, to cool the material and the mill during grinding and to recycle vaporized cryogen from the mill back into the mill as the medium for conveying material to be ground into the mill.
申请公布号
US5203511(A)
申请公布日期
1993.04.20
申请号
US19900490175
申请日期
1990.03.08
申请人
AIR PRODUCTS AND CHEMICALS, INC.
发明人
ONDUSH, ANDREW P.;RITTER, RICHARD D.;ANDERSON, ARTHUR H.