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| Preparation and Application of Dicyandiamide-formaldehyde as a Retention and Drainage Aid |
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| DOI：10.11981/j.issn.1000-6842.2016.04.6 |
| Key Words:dicyanodiamide-formaldehyde； cationic polymer； retention and drainage |
| Fund Project:山东省科技重大专项(产业转型升级)(2015ZDZX11011)；制浆造纸工程国家重点实验室开放基金(201474)；青岛科技大学大学生创新创业训练计划项目(201601008)。 |
| Author Name | Affiliation | | 何 柳1 | 1.青岛科技大学化工学院,山东青岛,266042 | | 李鹏飞1 | 1.青岛科技大学化工学院,山东青岛,266042 | | 许 磊1 | 1.青岛科技大学化工学院,山东青岛,266042 | | 鲁俊良1 | 1.青岛科技大学化工学院,山东青岛,266042 | | 张 媛1 | 1.青岛科技大学化工学院,山东青岛,266042 | | 张 恒1,2,* | 1.青岛科技大学化工学院,山东青岛,266042；2.华南理工大学制浆造纸工程国家重点实验室,广东广州,510640 |
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| Abstract: |
| In this paper, dicyanodiamide-formaldehyde (DDF) polycondensate was prepared using dicyanodiamide and formaldehyde as raw materials, and the feasibility of using DDF as a retention and drainage aid was studied. The effects of four influencing factors such as dosage of DDF, pH of pulp, mixing time and the adding order of DDF and CaCO3 on the retention and drainage performance were discussed, and its retention efficiency was compared with CPAM. The results indicated that DDF could obviously improve retention but not the case for drainage. And retention reached the best in the conditions of DDF dosage of 0.03%, pH of pulp=9 and mixing 6~7 min with adding DDF firstly. |
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