脱油樟木APMP制浆性能研究

Study on APMP Pulping Property of De-oiled Camphor Woodchips

关键词:  樟木  APMP制浆  物理性能  H₂O₂漂白  COD

Key Words:camphor woodchips  APMP pulping  physical properties  H₂O₂ bleaching  COD

摘要:分析了蒸汽脱油后樟木片的材性和化学组分，实验室和工厂中试评估了该原料APMP制浆性能并分析了制浆过程中的废水负荷情况，探讨了樟木APMP浆碱性H₂O₂漂白的可漂性能。结果表明，在漂白温度90 ℃、浆浓25%、NaOH用量60 kg/t浆、H₂O₂ 50 kg/t浆条件下，樟木APMP浆的物理强度略低于杨木APMP浆、高于桉木APMP浆，可漂性低于杨木APMP浆和桉木APMP浆，樟木APMP制浆过程废水总COD负荷为杨木、桉木的2倍，当H₂O₂用量70 kg/t浆时，樟木APMP浆白度可达75.0%，得率82.5%。微漂APMP制浆中试结果表明，当H₂O₂用量27 kg/t浆时，樟木APMP浆白度达35.9%。在打浆度44.0 °SR时，纸张抗张指数达28.5 N·m/g，松厚度2.57 cm³/g，可用于配抄中高端包装纸产品。

Abstract:Chemical components of de-oiled camphor woodchips were analyzed. Laboratory and pilot scale trials on APMP pulping properties of de-oiled camphor woodchips were performed.The bleaching property of alkalire H₂O₂ of de-oiled camphor wood APMP pulp was investigated. The results showed that under the conditions of NaOH dosage 60 kg/t pulp， H₂O₂ dosage 50 kg/t pulp， temperature 90 ℃ and pulp consistency 25%， physic strengths of camphor wood APMP pulp were higher than eucalypt APMP pulp， but lower than poplar APMP pulp， however its bleachability was lower than both above. In terms of total COD of wastewater， the APMP pulping process of camphor wood was twice that of poplar wood and eucalyptus wood. As the H₂O₂ dosage of 70 kg/t pulp， camphor pulps could be produced at a brightness level of 75.0% with a yield of 82.5%. Results of pilot trials of camphor woodchips chemimechanical pulping showed that， at the H₂O₂ dosage of 27 kg/t pulp， camphor woodchips APMP pulps were produced with a brightness of 35.9%. Papers were prepared from camphor woodchips APMP pulp at beating degree of 44.0 °SR， with tensile strength of 28.5 N·m/g and bulk of 2.57 cm³/g， which was acceptable as furnish for mid-high grade of packaging papers.