The highly active fly ash admixture was obtained by activation treatment of low grade wet fly ash with efficient composite activating techniques of chemical activation, hydrothermal activation and mechanical grinding, using quicklime and raw gypsum as activators. 以生石灰、生石膏为激发剂,采用化学激发、水热激发与机械磨细相结合的高效复合活化技术对低等级湿排粉煤灰进行活化处理,可得到高活性粉煤灰掺合料。
The palmic acid extracting from lacquer wax was used as modifier of nanometer calcium carbonate, and the optimum condition of modification was obtained by using the activation grade as main judgement criteria. 采用从漆蜡中提取的棕榈酸作为表面改性剂,以活化度作为改性效果主要评价指标,对纳米碳酸钙粉体进行表面改性处理,确定了最佳改性工艺条件。
The high active fly ash was obtained by proceeding activation treatment for low grade fly ash with adopting efficient composite activating technique of physical activation ( mechanical grinding) and chemical activation ( adding composite chemical activator). 采用物理活化(机械磨细)与化学活化(加复合化学激发剂)相结合的高效复合活化技术对低等级粉煤灰进行活化处理,可得到高活性粉煤灰。
Activation grade of sample in the presence of dispersant polyethylene glycol is 49.6%. 分散剂PEG存在下NaSt改性碳酸钙样品活化度为49.6%。
A simplified technological flowsheet is proposed ( carbonization followed by activation with steam) for making active carbon from schungite and low grade coal. 本文提出一种简易工艺流程(碳化及通蒸汽活化),从次石墨和煤中制取活性炭。
In this paper, the active fly ash was obtained by procee-ding activation treatment for low grade fly ash with adopting the only mechanical grinding and the mechanical grinding plus chemical activator ( NaOH 、 Na2SO4). 本文采用单独机械磨细和机械磨细与化学激发剂(NaOH、Na2SO4)相复合的方法来提高低等级粉煤灰的活性。
Influence of Technique of Composite Activation and Optimized Components on Activation Index of Grade ⅱ Flying Ash 复合激活和组份优化技术对Ⅱ级粉煤灰活性指标的影响
Calcium carbonate modified with sodium polyacrylate was added to water alkyd paint. As pH value of the slurry increases activation grade decreases quickly at first then becomes constant 2% and oil-absorbed value increases slowly. 采用硬脂酸钠对纳米碳酸钙进行了表面修饰,用氢氧化钙溶液调节碳酸钙浆料的pH值,随着浆料pH值的增大活化度先下降后趋于稳定值2%,吸油值呈增大的趋势。