摘要
造纸工业中常用空气进行废纸浆的浮选脱墨,研究证明用臭氧和氧气的混合气体代替空气进行浮选脱墨,可以提高废纸的回收利用率。实验数据显示:在适宜的臭氧浓度下,用臭氧/氧气代替空气进行浮选脱墨能够提高油墨去除率,并且能使损耗率下降,因为相对于单纯的空气来说臭氧/氧气对油墨有更好的选择性。在室温下,臭氧浮选新闻纸和杂志纸的选择性达到了100%,脱墨后COD下降明显,同时浮选前碱的用量也减少了。
To improve paper recycling, the potential of an innovative deinking process using a reactive ozone/oxygen gas mixture instead of air was studied on two recovered paper furnishes （offset print and newsprint/magazine mixture）. Using suitable ozone concentrations, ink removal, following first-order kinetics, increased and losses dropped leading to better selectivity than using air alone. The ozone benefits in term of selectivity depended on temperature and paper furnishes and reached 100% for newsprint/magazine furnish at ambient temperature. Finally deinking effluent COD was significantly reduced and the ozone-based flotation allowed the reduction of the alkaline chemistry used before flotation.
出处
《中华纸业》
CAS
2016年第4期52-56,共5页
China Pulp & Paper Industry
