本文選題：蒙脫石 + 鉀離子�。� 參考：《煤炭學報》2016年02期

【摘要】：蒙脫石是影響煤泥水沉降性能的主要因素,為了研究鉀離子對蒙脫石水化膨脹的抑制性能,進行蒙脫石的靜沉降試驗和壓濾試驗。蒙脫石在去離子水溶液中體積膨脹為原干粉體積的2.3倍,而蒙脫石在0.1 mol/L的鉀離子溶液中的體積膨脹僅為原來的1.8倍,且蒙脫石在鉀離子溶液中的過濾速度明顯快于在去離子水溶液中的過濾速度。鉀離子可較好地抑制蒙脫石的水化膨脹,且鉀離子對蒙脫石膨脹的抑制性能優(yōu)于鈣離子。鉀離子抑制蒙脫石水化膨脹的機理是:鉀離子被蒙脫石吸附后,就嵌入晶層間,由于鉀離子水化能較低,不容易水化,使晶層間已有的水分子被排出,且晶層間的鉀離子的鍵合作用極大地抑制住了鄰近晶層間的膨脹或者分離過程。
[Abstract]:Montmorillonite is the main factor affecting the settling performance of coal slime water. In order to study the inhibition of potassium ions on the hydration expansion of montmorillonite, the static settlement test and pressure filtration test of montmorillonite were carried out. The volume expansion of montmorillonite in deionized water solution was 2. 3 times that of dry powder, while that of montmorillonite in 0. 1 mol/L potassium ion solution was only 1. 8 times. The filtration rate of montmorillonite in potassium ion solution is faster than that in deionized water solution. Potassium ion can inhibit the hydration expansion of montmorillonite, and potassium ion can inhibit the expansion of montmorillonite better than calcium ion. The mechanism of potassium ion inhibiting the hydration expansion of montmorillonite is that the potassium ion is absorbed by montmorillonite and intercalated into the intergranular layer. Due to the low hydration energy of potassium ion, it is not easy to hydrate, so the existing water molecules in the intergranular layer are expelled. In addition, the bond cooperation of potassium ions between crystal layers greatly inhibits the process of expansion or separation between adjacent layers.
【作者單位】： 中國礦業(yè)大學(北京)化學與環(huán)境工程學院;
【基金】：國家重點基礎研究發(fā)展計劃(973)資助項目(2012CB214902) 北京市自然科學基金資助項目(3154037)
【分類號】：TD94
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本文編號：1887191