纤维密封材料生产中助滤体系的应用研究

Application of the Drainage Aids in the Slurry of Fiber Sealing Materials

以比过滤阻力（Specific Filtration Resistance，SFR）为浆料滤水性能指标、光透射式采集图像的灰度直方图为成形匀度的评判标准，探讨了阳离子聚丙烯酰胺（CPAM）单元助滤体系、CPAM-膨润土微粒体系和聚氧化乙烯（PEO）-木素磺酸钙（木钙）体系对纤维密封材料浆料滤水性能和匀度的影响。结果表明，CPAM-膨润土微粒体系可以有效改善浆料的滤水性能，且对匀度影响最小。考察了搅拌速率、pH值、电导率、阴离子垃圾含量等因素对CPAM-膨润土微粒体系助滤效果的影响，发现加入第一组分CPAM后，随着搅拌速率的增大，CPAM一膨润土微粒体系的助滤效果下降；pH值4．5—9．5之间，电导率750—5000μS／cm之间，阳离子需求量低于30μmol／L时，CPAM-膨润土微粒体系均有良好的助滤效果。

The impacts of different drainage aid systems on drainage of the slurry of fiber sealing materials and the formation of its sheets were studied. The result showed that CPAM-bentonite system could effectively improve the drainage while maintaining good formation. With the increase of stirring speed after adding CPAM, the drainage performance of CPAM-bentonite system decreased. It was also found that for the stock system, when the pH value was between 4. 5 and 9. 5, the conductivity was between 750 μS/cm and 5000 μS/cm, the cationic demand was below 30 μmol/L, the CPAM-bentonite drainage aid system had always performed well.