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
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.
