Abstract： The particle size distribution of titanium concentrate was determined by the dry sieving method (mechanical sieving method). The determined results of particle size distribution were represented according to the statistical confidence interval. The results show that the reasonable sieving time is determined as 11 min in accordance with the end points principle. No outlier is found by judging repeatedly measured particle size distribution with Grubbs criterion at the conditions that the determining times is 12 and the significance level α is equal to 0.05. The relative standard deviation for the particle size distribution is between 1.0% and 4.5% at the condition that the determining times is 12. The precision and reproducibility meet the requirements of the sieving method.

Keywords: sieving method; titanium concentrate; particle size distribution; precision; confidence interval

中图分类号：TB302.1       文献标志码：A

文章编号：1008-5548(2015)03-0076-04

DOI:10.13732/j.issn.1008-5548.2015.03.018

收稿日期：2014-06-25， 修回日期：2014-07-06，在线出版时间：2015-06-24。

第一作者简介：刁源生（1964—），男，高级工程师，研究方向为化学分析样品制备、筛分法粒度测定、冶金物料及钒钛制品标准样品制备。电话 ：13678205088，E-mail ：dyspzh@sohu.com。