Solid material comminution or disintegration – Processes – With heating or cooling of material
Patent
1998-03-06
2000-04-11
Rosenbaum, Mark
Solid material comminution or disintegration
Processes
With heating or cooling of material
241 65, 241DIG31, B02C 1912
Patent
active
060479116
ABSTRACT:
A method for reclaiming rubber comprising the steps of (a) producing scrap from used rubber materials; (b) milling said scrap to produce rubber crumbs characterised in that the crumbs of said milling step (b) are continuously fed to the milling machine at compression force preferably 100 metric tonnes and the temperature of the crumb feed being milled is maintained at a suitable temperature so as to obtain the reclaimed rubber. The preferred embodiment of the invention provides for a cooling system to keep the temperature of the milling process below 100.degree. C., the pressure being exerted by the mill rolls at close to zero nip with roll speeds at a 1:1.6 ratio, and the surfaces of the rolls are smoothen. Most preferably, the compression force is equivalent to 200 metric tonnes in weight and the crumb feed is continuously milled for about 30 revolutions.
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patent: 4844350 (1989-07-01), Larsson
patent: 5411213 (1995-05-01), Just
patent: 5588600 (1996-12-01), Perfido et al.
patent: 5634599 (1997-06-01), Khais et al.
R. Schaefer and R.A. Isringhaus, "Reclaimed Rubber" in Rubber Technology, 3.sup.rd Ed., Van Nostrand Reinhold Co., New York, p. 505-517 (1987).
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