高分子聚合物调控膨润土造浆性能及机理研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2256-2263.

高分子聚合物调控膨润土造浆性能及机理研究

李鑫¹, 吴雪兰¹, 龙红明^1,2, 王为奎³, 余正伟¹, 李祥¹

1.安徽工业大学冶金工程学院,马鞍山 243032;
2.冶金减排与资源综合利用教育部重点实验室,马鞍山 243002;
3.句容康泰膨润土有限公司,镇江 212441

收稿日期:2021-02-22 修回日期:2021-03-24 出版日期:2021-07-15 发布日期:2021-08-04
通讯作者: 吴雪兰,博士,副教授。E-mail:wuxuelan668@163.com
作者简介:李鑫(1994—),男,硕士研究生。主要从事矿物加工与二次资源综合利用研究。E-mail:1106062709@qq.com
基金资助:
国家自然科学基金(51504004);安徽省教育厅重点项目(KJ2015A118);大学生创新创业训练计划项目(202010360006、S202010360151)

Pulping Properties and Mechanism of Bentonite Controlled by Polymer

LI Xin¹, WU Xuelan¹, LONG Hongming^1,2, WANG Weikui³, YU Zhengwei¹, LI Xiang¹

1. School of Metallurgy Engineering, Anhui University of Technology, Maanshan 243032, China;
2. Ministry of Education Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resources, Maanshan 243002, China;
3. Jurong Kangtai Bentonite Co., Ltd., Zhenjiang 212441, China

Received:2021-02-22 Revised:2021-03-24 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

摘要： 基于江苏某蒙脱石含量为43%的钠化膨润土,对其进行造浆性能检测,发现该膨润土Φ600为5 mPa·s,滤失量为27 mL,造浆性能指标无法满足国标用土的要求,进而提出添加不同高分子聚合物来改善其造浆性能的方案。本文通过单因素试验研究了高分子聚合物对膨润土造浆性能的影响,并采用扫描电镜、傅里叶变换红外光谱、X射线衍射以及Zeta电位等分析手段探究不同高分子聚合物影响膨润土造浆性能的机理,再通过正交试验及优化试验,得到最优的高分子聚合物组合及用量。结果表明:高分子聚合物可吸附在膨润土颗粒表面,这不仅有利于晶格表面氢键的形成,还可形成网状结构,使得泥浆黏度增大,滤失量降低。当添加高分子聚合物为0.1%(质量分数)的聚丙烯酸钠+0.4%(质量分数)的羧甲基淀粉时,膨润土的Φ600为60.5 mPa·s,滤失量为14.5 mL,其他性能也均满足国标对泥浆土的要求。

关键词: 蒙脱石, 膨润土, 造浆性能, 高分子聚合物, 泥浆

Abstract: Based on the test of sodium bentonite with 43% montmorillonite content in Jiangsu province, it was found that the Φ600 of mud was 5 mPa·s, and the filter loss was 27 mL. The bentonite cannot meet the requirements of national standard soil. In this paper, a scheme was proposed to improve the pulping performance by adding different polymers. The influence of polymer on the properties of bentonite slurry was studied by single factor experiment. SEM,FTIR, XRD and Zeta potential were used to investigate the mechanism of the effect of the polymer on the slurry-making properties of bentonite. The optimum polymer composition and dosage were obtained by orthogonal experiment and optimization experiment. The results show that the polymer is adsorbed on the surface of bentonite particles, which is not only beneficial to the formation of hydrogen bond on the crystal surface, but also to the formation of network structure. Which improves the viscosity of the mud, and reduces the loss of mud. When the polymer is 0.1% (mass fraction) sodium polyacrylate+0.4% (mass fraction) carboxymethyl starch, the Φ600 of mud is 60.5 mPa·s, and the filter loss is 14.5 mL. Other properties also met the requirements of the national standard for mud soil.

Key words: montmorillonite, bentonite, pulping property, polymer, mud

中图分类号:

TD985

李鑫, 吴雪兰, 龙红明, 王为奎, 余正伟, 李祥. 高分子聚合物调控膨润土造浆性能及机理研究[J]. 硅酸盐通报, 2021, 40(7): 2256-2263.

LI Xin, WU Xuelan, LONG Hongming, WANG Weikui, YU Zhengwei, LI Xiang. Pulping Properties and Mechanism of Bentonite Controlled by Polymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2256-2263.

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