Method for circulation grinding of brittle grinding stock and gr

Details Method for circulation grinding of brittle grinding stock and gr Method for circulation grinding of brittle grinding stock and gr

1998-09-01

2000-03-07

Husar, John M.

Solid material comminution or disintegration

Processes

With classifying or separating of material

241 2415, 241 27, 241 29, 241 791, 241159, 241227, 241300, B02C 402

Patent

active

060328827

ABSTRACT:
In order to enable grinding, with the lowest possible specific energy requirement, of brittle grinding material, in particular moist ores and/or other moist minerals, with the use of an interparticle crushing high-pressure roll press in which the roll surfaces are protected against wear by means of a grid armoring by an autogenous wear protection layer, without having to accept the risk of a premature damaging of the wear protection layer given the occurrence of rough particles/oversized particles/scattered particles, a smooth roll mill is connected upstream from the interparticle crushing high-pressure roll press, in whose nip (i.e. that of the smooth roll mill), the nip width is limited to a maximum of approximately 4 mm, such that only the oversized particles (scattered particles) contained in the feed material are coarse-crushed by means of individual particle crushing.

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patent: 5203513 (1993-04-01), Keller et al.
patent: 5392998 (1995-02-01), Suessegger et al.

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