摘要
疏水性的磁铁矿作为磁种被用于废纸脱墨。磁铁矿表面吸附有一层油酸钠和硬脂酸而具有了疏水性。用煤油使油墨与磁种发生聚团,然后采用磁选法实现油墨的去除。文章探索油墨与磁种之间疏水聚团的工艺条件。研究结果表明,磁种用量3g/L、煤油用量0.3125g/L、pH=9、搅拌时间45min、温度45℃为最佳工艺参数,此条件下油墨在磁性产品中的回收率达94.99%。
Hydrophobic magnetite was used for waste paper deinking.Magnetite was rendered hydrophobic by a surface adsorption of sodium oleate and stearic acid.Ink was agglomerated with magnetite with the aid of kerosene,and removal of ink then achieved by magnetic separation.Hydrophobic agglomeration process between ink and modified magnetite was examined in this paper.As the results show,the recovery rate of ink in magnetic products under the optimum experiment conditions where the dosage of magnetite is 3.0g/L,the dosage of kerosene is 3.125g/L,pH=9,the stir time is 45min and the temperature is 45℃.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第S2期165-168,共4页
Environmental Science & Technology
基金
国家自然科学基金项目资助(50774015)
关键词
脱墨
疏水聚团
磁种分选
疏水改性
deinking
hydrophobic agglomerate
magnetic separation
hydrophobic modification
