The mechanical and chemical effect on the pulping properties of the old newsprint was studied using a FORMAX Micro-Maelstrom Laboratory Pulper, and the flotation conditions such as velocity of air flow, air pressure a...The mechanical and chemical effect on the pulping properties of the old newsprint was studied using a FORMAX Micro-Maelstrom Laboratory Pulper, and the flotation conditions such as velocity of air flow, air pressure and flotation time were also discussed with a FORMAX Deink Cell. The results show that sodium hydroxide, sodium silicate, hydrogen peroxide and deinking agent are the key factors in the chemical effect, and pulping consistency is more important than pulping time and rotation speed in the mechanical effect during the high consistency pulping of the ONP. In general, the chemical effect has a greater influence on the deinked pulp properties than the mechanical effect.展开更多
以现代化大型脱墨浆生产线为对象,采用Pulmac MasterScreen胶黏物筛分仪对取自生产线不同部位的废纸脱墨浆样进行筛分处理,以获得胶黏物试样,然后采用Verity IA MasterScreen图像分析软件检测了大胶黏物的数量、面积和含量,讨论了在废...以现代化大型脱墨浆生产线为对象,采用Pulmac MasterScreen胶黏物筛分仪对取自生产线不同部位的废纸脱墨浆样进行筛分处理,以获得胶黏物试样,然后采用Verity IA MasterScreen图像分析软件检测了大胶黏物的数量、面积和含量,讨论了在废纸脱墨制浆过程中大胶黏物的存在状况及不同操作单元对大胶黏物的去除作用。结果表明,大部分的大胶黏物尺寸为0.01~0.10 mm2;从废纸碎解成浆到纸机前,90%以上的大胶黏物可通过筛选净化除去;粗筛选和低浓除渣、精筛选分别可以去除进浆中大约45%、31%的大胶黏物;热分散处理可以显著减小大胶黏物的尺寸。展开更多
文摘The mechanical and chemical effect on the pulping properties of the old newsprint was studied using a FORMAX Micro-Maelstrom Laboratory Pulper, and the flotation conditions such as velocity of air flow, air pressure and flotation time were also discussed with a FORMAX Deink Cell. The results show that sodium hydroxide, sodium silicate, hydrogen peroxide and deinking agent are the key factors in the chemical effect, and pulping consistency is more important than pulping time and rotation speed in the mechanical effect during the high consistency pulping of the ONP. In general, the chemical effect has a greater influence on the deinked pulp properties than the mechanical effect.
文摘以现代化大型脱墨浆生产线为对象,采用Pulmac MasterScreen胶黏物筛分仪对取自生产线不同部位的废纸脱墨浆样进行筛分处理,以获得胶黏物试样,然后采用Verity IA MasterScreen图像分析软件检测了大胶黏物的数量、面积和含量,讨论了在废纸脱墨制浆过程中大胶黏物的存在状况及不同操作单元对大胶黏物的去除作用。结果表明,大部分的大胶黏物尺寸为0.01~0.10 mm2;从废纸碎解成浆到纸机前,90%以上的大胶黏物可通过筛选净化除去;粗筛选和低浓除渣、精筛选分别可以去除进浆中大约45%、31%的大胶黏物;热分散处理可以显著减小大胶黏物的尺寸。