细颗粒泥沙絮凝-分散在水土保持中的应用

简要介绍了细颗粒泥沙絮凝 -分散对土壤渗透性、土壤可蚀性以及污染物迁移的影响 ,以期有效防治水土流失和由此带来的非点源污染。

非点源污染物细颗粒泥沙的絮凝-分散研究

细颗粒泥沙的絮凝-分散对土壤结构的稳定性，土壤中农用化合物的迁移以及侵蚀泥沙的输移、沉积有重要作用。文章概述了影响细颗粒泥沙絮凝-分散的几种主要因素——电解质种类及其浓度，矿物组成，有机质含量，pH值以及水流紊动等；指出了当前研究中存在的不足之处。

江西抚州砂子岭高岭土选择性分散－絮凝试验研究

江西抚州砂子岭高岭土中氧化铁矿物呈微细粒集合体或分散体状与高岭石类和云母类矿物紧密共生，分选极为困难．本文研究了各种分散剂、絮凝剂以及选择性分散－絮凝工艺流程，提出了一种途择性分散－絮凝工艺，为破子岭高岭土除铁提供了可行的途径．

Effects of water hardness on selective flocculation of diasporic bauxite

The effect of electrolyte on settling behavior of kaolinite was studied. Effects of hard water on selective flocculation of diasporic bauxite was tested and the measures were taken to eliminate the effects of Ca2＋ and Mg2＋ in hard water. The results indicated that, not only the concentration of electrolyte ions but also the ionic valence of the electrolyte ions affects the settling behavior of kaolinite; hard water significantly affects its selective flocculation owing to Ca2＋ and Mg2＋; general dispersants could not eliminate the effects of Ca2＋ and Mg2＋. Self-made softening agent in our lab could weaken or eliminate the effects of hard water on flocculation processes. The results of molecular dynamics simulation show that softening agent molecules could restrict Ca2＋ and prevent them from playing their roles, so as to eliminate the effects. The continuous pilot experiment results of bauxite flocculation were even better than those obtained in laboratory.

超微细嵌布铁矿选矿技术研究

采用层压破碎,预选抛尾,球磨、塔磨+助磨、艾萨磨、分散-絮凝的阶段磨矿阶段磁选工艺,在磨矿细度-8μm85%的条件下,超微细嵌布黄沙泉铁矿可获得精矿Fe品位62.83%,SiO_(2)含量7.95%,TFe回收率63.69%,MFe回收率94.78%的较好指标。层压破碎后相对可磨度显著提高,复配助磨剂用量1 kg/t时助磨效果至少可达10%。