초록 ▼

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/cm2 to result in energy sufficiently high not only to cause comminution, but

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/cm2 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.

대표청구항 ▼

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 mm-1000 mm comprising: (a) stressing a bed of bulk coarse material containing particles of the brittle material to be comminuted which

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 mm-1000 mm 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/cm2 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.