| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement clinker milling apparatus possible to adjust the particle size distribution of a cement product and to improve milling efficiency without enlarging the constitution. SOLUTION: The milled product produced by milling cement clinker by a vertical type roller mill is transported upward by a bucket elevator 23, supplied to a fluidized bed type classification apparatus 26 to be roughly classified to approximately fine powder and the remaining coarse particle-containing milled matter, and then only the approximately fine powder is supplied to a separator to be classified to a fine powder and a coarse powder and then the fine powder is taken out as a cement product and the coarse powder is turn back again to the vertical type roller mill after being mixed with the remaining coarse particle-containing milled matter classified by the fluidized bed type classification apparatus 26. In such a manner, the load to the air current type classification apparatus 27 is lessened to make the apparatus 27 possible to be miniaturized and, at the same time, the particle size constitution of the cement product is made adjustable by adjusting the amount of the remaining milled matter bypassing the fluidized-bed type sieving apparatus 26 to improve the quality of the cement product.
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