Method of fine and very fine comminution of materials having brittle behavior
OwnerKlaus Schonertinventor
Life of this patent
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Abstract
In order to carry out a fine and very fine comminution of brittle material, a bed of bulk material to be comminuted is first stressed between two practically non-yielding hard surfaces with a compression of at least 500 kg/cm.sup.2 to result in energy sufficiently high not only to cause comminution, but to also cause a distinct agglomeration or briquetting of the particles, whereafter the resulting agglomerates or briquettes are disintegrated by further mechanical stressing in a separate device.
Claims25
In a method for comminution of particles of brittle materials to obtain product of fine particles the maximum particle size of which is approximately in the range 2 .mu.m-1000 .mu.m comprising:
- (a) stressing a bed of bulk coarse material containing particles of the brittle material to be comminuted which are of a size larger than the fine particles to be obtained, between non-yielding hard surfaces to thereby obtain comminution of the coarse particles into finer fragments along with a agglomeration of finer fragments;
- and
- (b) subsequently disintegrating the resulting agglomerates to obtain the product containing the fine fragments, the improvement comprising:
- (c) carrying out said stressing of said bed of material by subjecting said bed to a pressure of at least 500 kg/cm.sup.2 between said non-yielding surfaces;
- and
- (d) carrying out said stressing in a single pass, whereby the total energy required comminute said particles will be substantially reduced.
Dependencies are inferred from the claim text.