贝克曼值在低木质素纸浆硬度检测中的应用

Application of Bjorkman Number on Hardness Detection for Low-lignin-content Pulps

关键词:  贝克曼值  木质素  纸浆  硬度  监测

Key Words:Bjorkman number  lignin  pulp  hardness  detection

摘要:本研究比较了纸浆卡伯值、高锰酸钾值、贝克曼值的测试方法的共同点和差异点，分析了使用贝克曼值监测低木质素纸浆硬度的优势，介绍了针对低木质素纸浆某企业贝克曼值测试方法的技术调整，并从反应液的浓度、酸度、固液比、反应时间以及方法的重复性论证了优化方法的可行性。连续10批的未漂马尼拉麻检测数据显示，高锰酸值为3.5~4.2，极差0.7，贝克曼值为23.4~28.2，极差4.8，贝克曼值具有更优的灵敏度。

Abstract:This study compared the common points and differences in determination parameters between Kappa number， Permanganate number and Bjorkman number， analysed the advantages of Bjorkman number application on hardness monitoring for low-lignin-content pulps， and introduced the improvements in determination parameters of the company of Bjorkman number for the low-lignin-content pulps. The feasibility of the optimisation scheme was presented in terms of concentration and acidity of the solution， solid-liquid ratio of sample to reagent， reaction time and method repeatability. The 10-batch unbleached manila hemp detection data showed that the Permangate number was between 3.5 and 4.2， with a fluctuation range of 0.7. The Bjorkman number was between 23.4 and 28.2， with a range of 4.8 which showed the Bjorkman number had better sensitivitj for low lignin content pulps.