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| Study on the Effect of Combinative Application of Fixing Agent and Retention Aid on Controlling Dissolved and Colloidal Substances in Pulp |
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| DOI： |
| Key Words:fixing agent retention aid combinative effect focused beam reflectance measurement dissolved and colloidal substances |
| Author Name | Affiliation | | 夏 星1 | 1.天津科技大学天津市制浆造纸重点实验室,天津,300457 | | 刘泽华1 | 1.天津科技大学天津市制浆造纸重点实验室,天津,300457 | | 王立军1,2,3,* | 1.天津科技大学天津市制浆造纸重点实验室,天津,300457；2.浙江科技学院浙江省废弃生物质循环利用与生态处理技术重点实验室,浙江杭州,310023；3.浙江永泰纸业股份有限公司钱江特聘专家工作站,浙江杭州,311421 | | 陈 辉1 | 1.天津科技大学天津市制浆造纸重点实验室,天津,300457 | | 王建华3 | 3.浙江永泰纸业股份有限公司钱江特聘专家工作站,浙江杭州,311421 |
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| Abstract:A polyamine (PA) fixing agent, and a cationic polyacrylamide (CPAM) retention aid were used individually as well as in combination to treat deinked old newspaper pulp, and focused beam reflectance measurement (FBRM) were utilized to measure the quantity, size and size distribution of the colloidal particles remained in the pulp, with the objective to elucidate the combinative effect of fixing agent and retention aid on controlling dissolved and colloidal substances (DCS) in papermaking pulp raw material. The results indicated that when the PA was used individually to treat the pulp, some colloidal agglomerates were formed which were not fixed onto fiber or trapped in fiber mat, thus resided in pulp filtrate; when the CPAM is used individually, its charge was neutralized easily by the DCS, therefore, its ability to reduce the quantity of colloidal particles in the pulp was decreased greatly, and the bigger colloidal agglomerates were not formed; when PA and CPAM were used in combination, those agglomerates formed by PA but resided in the aqueous phase were further retained onto fiber by CPAM, therefore, better effect in reducing the quantity of the colloidal particles without forming bigger colloidal agglomerates was achieved. |
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