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采用筛析法(包括负压筛法和水筛法)、勃氏法和激光粒度法分别测定了不同种类、不同细度的石灰石粉的细度,并对以上四种方法的结果进行了对比分析。结果表明,石灰石粉较细时采用负压筛法因产生团聚导致糊筛而不能得到准确的筛余结果;水筛法对石灰石粉细度检测适应性强,本试验中所有石灰石粉的筛余都可以采用该方法获得;采用勃氏法测定比表面积时需要变化一系列空隙率,试验过程复杂;激光粒度法的测定结果与仪器的精密度密切相关,基于激光粒度分布计算的筛余及比表面积与水筛和勃氏法测定值之间并不能对应。结果表明,水筛法是石灰石粉细度的最佳测定方法,勃氏法可在石灰石粉筛余相近时作为石灰石粉细颗粒含量的补充测定方法。
The fineness of limestone powders of different kinds and fineness were determined by sieve analysis (including negative pressure sieve method and water sieve method), the method of Burson and laser particle size respectively, and the results of the above four methods were compared analysis. The results show that when the limestone powder is finer, negative pressure sieve method can cause agglomeration to result in paste sieving, which can not get the accurate sieve residue result. The water sieve method has strong adaptability to the fineness detection of limestone powder. In this experiment, all the limestone powder sieve Can be obtained by this method; when using the Buchs method to determine the specific surface area of the need to change a series of porosity, the test process is complex; laser particle size measurement results and the precision of the instrument is closely related to the particle size distribution based on laser sieve residue and ratio The surface area does not correspond to the water screen and the Burk method. The results show that the water sieve method is the best method to determine the fineness of limestone powder. The method can be used to supplement the limestone fine particle content when the limestone sieve residue is similar.