硫酸镁用作湿强废纸再制浆助剂的研究  

Using Magnesium Sulfate as a Re-pulping Aid to Deal with Wet Strong Waste Paper

作　　者：刘乐 马昊然 高琦 宋亚丽[1] 高玉杰[1] LIU Le;MA Haoran;GAO Qi;SONG Yali;GAO Yujie(Tianjin Key Laboratory of Pulp&Paper,College of Light Industry Science and Engineering,Tianjin University of Science&Technology,Tianjin 300457,China)

机构地区：[1]天津市制浆造纸重点实验室,天津科技大学轻工科学与工程学院,天津300457

出　　处：《天津科技大学学报》2020年第6期20-24,43,共6页Journal of Tianjin University of Science & Technology

摘　　要：以硫酸镁作为新型再制浆助剂作用于废旧育果袋纸并探究其最佳碎浆条件和碎浆效果.结果表明,最佳碎浆条件为在pH=11的条件下碎浆温度50℃、碎浆浓度12%、硫酸镁用量8%(相对于绝干废纸质量)、碎浆时间20 min.硫酸镁作为新型再制浆助剂作用于废旧育果袋纸,碎浆后良浆得率可达83.88%.在良浆得率维持在较高水平的基础上可取得相对较好的再生纸成纸强度,其中撕裂指数较硫酸铝提高了8.71%,为7.99 mN·m2/g,并且处理每吨废纸所需助剂成本较硫酸铝降低了58%,为40元.Magnesium sulfate was selected as a new repulping aid for old fruit cultivating bag paper.The optimum pulping conditions and pulping effects were explored.The optimal pulping conditions adopted in this study were as follows:50℃pulping temperature,12%pulp concentration,8%magnesium sulfate dosage(compared with absolutely dry old paper)and 20 min pulp crushing time at a pH of 11.The results indicate that not only the yield of accept pulp could reach 83.88%when magnesium sulfate was used as a new type of repulping aid to deal with old fruit cultivating bag paper,but the recycled paper can obtain high strength.Compared with aluminum sulfate,the tear index increased by 8.71%to 7.99 mN·m2/g,and the cost of aid for each ton of waste paper is reduced by 58%to 40 yuan.

关 键 词：硫酸镁 废旧育果袋纸 良浆得率 纤维性质 纸页性能 

分 类 号：TS743.2[轻工技术与工程—制浆造纸工程]