重质碳酸钙粒度分析中遮光比的研究

Study on shading ratio in particle size analysis of ground calcium carbonate

中文关键词:  激光粒度分析仪  重质碳酸钙  粒度  遮光比

英文关键词:laser particle size analyzer  ground calcium carbonate  particle size  shading ratio

中文摘要:

      目的 通过重质碳酸钙的粒度测定对测试样品的遮光比进行研究控制。方法 采用激光粒度分析仪进行重质碳酸钙的粒度测定, 采用同一实验条件, 只改变遮光比的情况下对同一样品进行激光粒度试验, 研究最佳遮光比范围。结果 遮光比不同最终粒度试验结果也不同。遮光比在10%~15%和15%~20%时D10的结果相对稳定, 且2个区域的最终D10的测定结果值分别为9.95和9.94, 两者的相对标准偏差(relative standard deviation, RSD)为0.1%; 遮光比在10%~15%和15%~20%时的结果相对稳定, 且2个区域的最终D90的测定结果值分别为33.25和33.27, 两者的RSD值为0.1%。结论 检测重质碳酸钙的激光粒度时, 要将其遮光比严格控制在10%~20%之间, 此遮光比下测定的结果可信度与可靠性最高, 结果也是最准确最具代表性的。

英文摘要:

      Objective To study and control the shading ratio of the test sample through the particle size determination of the heavy calcium carbonate. Methods The laser particle size of heavy calcium carbonate was determined by laser particle size analyzer. The laser particle size test was carried out on the same sample under the same test conditions and only changing the shading ratio. The optimum shading ratio range was studied. Results The final particle size test with different shading ratios were also different. When the shading ratio was at 10%?15% and 15%?20%, the results of D10 were relatively stable, and the final D10 values of two kinds of regions were 9.95 and 9.94 with the relative standard deviation of 0.1%. The shading ratio was relatively stable at 10%?15% and 15%?20%, and the final D90 values of two kinds of regions were 33.25 and 33.27. The relative standard deviation value was 0.1%. Conclusion When measuring the laser particle size of heavy calcium carbonate, the shading ratio should be strictly keep between 10% and 20%. The results measured under this shading ratio have the highest reliability and reliability, and the results are the most accurate and representative.