Extended DLVO theory applied to coal slime-water suspensions
Extended DLVO theory applied to coal slime-water suspensions
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扩展 DLVO 理论应用于煤泥水悬浮液
DOI：
10.1007/s11771-012-1443-1
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发表时间：
2012-12
期刊：
影响因子：
--
通讯作者：
Zhang Ming-qing, Liu Qi, Liu Jun-tian
中科院分区：
文献类型：
--
作者：
Zhang Ming-qing, Liu Qi, Liu Jun-tian
煤泥主要由煤和粘土颗粒组成。采用扩展的DLVO（DERJAGUIN-LANDAU-VERWEY-OVERBEK）理论计算了颗粒间的相互作用能，并根据不同水硬度条件下煤-高岭石和煤-蒙脱石悬浮液的沉降实验，分析了颗粒间的聚集机理。结果表明，对于煤-高岭石悬浮液，当水硬度达到10.0mol/L时，煤颗粒之间容易发生团聚，随后煤颗粒与高岭石颗粒发生团聚。然而，高岭石颗粒之间没有发生聚集。蒙脱石颗粒在煤-蒙脱石悬浮液中形成粘土片晶网络，煤颗粒被捕获到该网络中。煤和蒙脱石颗粒完全沉降。
Coal slimes are mainly composed of coal and clay particles. The interaction energies among these particles were calculated using extended DLVO (DERJAGUIN-LANDAU-VERWEY-OVERBEEK) theory and the aggregation mechanisms were analyzed based on the settling experiments for coal-kaolinite and coal-montmorillonite suspensions, respectively, under different conditions of water hardness. The results indicate that for coal-kaolinite suspensions, as the water hardness reaches 10.0 mol/L, the coal particles aggregate with each other easily, and then, the coal particles may aggregate with kaolinite particles. However, no aggregation occurs between kaolinite particles. A clay platelet network is formed in coal-montmorillonite suspensions by montmorillonite particles and coal particles are captured into the network. Coal and montmorillonite particles settle completely.
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