不同类型聚丙烯酰胺对微细石英颗粒的絮凝特性研究

doi:10.11799/ce202006029

摘要/Abstract

摘要： 为研究不同类型聚丙烯酰胺对微细石英颗粒絮凝沉降特性及作用机理，开展了不同类型聚丙烯酰胺作用下微细石英颗粒悬浮液絮凝沉降试验研究，考察了药剂种类及用量、pH值、矿浆浓度、动能输入等对微细石英颗粒悬浮液絮凝沉降特性的影响规律。结果表明：不同类型聚丙烯酰胺对微细石英颗粒沉降特性的影响规律为：阳离子型＞非离子型＞阴离子型|非离子型在800万时效果较好，阴离子型和阳离子型均在1200万时效果较好。当阳离子型用量为300g/t、溶液pH=5、矿浆浓度40g/L时沉降产率高达99.4%，浊度值为8.070。聚丙烯酰胺与微细石英颗粒之间的作用方式主要是“电性中和”、“吸附架桥连接”和“网捕作用”。

关键词: 聚丙烯酰胺, 微细石英颗粒, 絮凝特性, 沉降产率, 上清液浊度

Abstract: In order to study the flocculation and sedimentation characteristics and mechanism of different types of polyacrylamide on fine quartz particles, the flocculation and sedimentation test of fine quartz particles suspension with different types of polyacrylamide was carried out, and the effect of dosage of medicament, pH value, pulp concentration, energy input and other factors on the flocculation and sedimentation characteristics of fine quartz particles were investigated. The result showed that the influence of different types of polyacrylamide on the settlement characteristics of fine quartz particles is: cationic > nonionic > anionic. The effect of nonionic type was better at 8 million, and that of anionic type and cationic type was better at 12 million. As the dosage of cationic was 300g/t, pH=5, pulp concentration was 40g/L, the sedimentation efficiency was up to 99.4% and the turbidity value was 8.070. The main modes of action between polyacrylamide and fine quartz particles were "electrical neutralization", "adsorption bridging flocculation" and “enmeshment ability”.

中图分类号:

TD94

张雪菲, 闵凡飞, 陈军. 不同类型聚丙烯酰胺对微细石英颗粒的絮凝特性研究[J]. 煤炭工程, 2020, 52(6): 134-141.

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