【摘要】 用水洗、酸洗和HCl—HF深度脱灰方法来脱除煤中矿物质,研究了水煤浆(CWM)的最高煤浆浓度(MXCL)、浆体流变性及静态稳定性的相应变化。不同的煤经水洗、酸洗预处理后对水煤浆性质的影响不同,其影响主要来自于煤浆中所溶出的可溶无机离子的浓度,特别是高价阳离子的浓度。高浓度的可溶高价阳离子,增加了浆体的表观粘度,降低MXCL和改善流变性。用HCl—HF深度脱灰预处理方法使CWM性质明显变坏。矿物质对水煤浆性质的影响主要是由于其亲水性及可溶离子的影响。更多还原

【Abstract】 Chinese coals were demineralized by using water ,acid and HCl-HF washing methods.The corresponding changes of maximun coal loading (MXCL),rheological behaviour and static stability of coal water mixture(CWM)were investigated.The effects of water and acid washing on the CWM properties are different from coals,which is mainly atributed to the concentration of dissolved inorganic ions,especially high value cations ,High concentration of dissolved high-value cations enhances apparent viscosity,reduces the MXCL and improves the rbeological behaviour.The deashing pretreatment by HCl-HF washing method markedly damages CWM properties,It seems that the effects of mineral matters on CWM properties mainly contribute to their hydrophobility and soluble ions.更多还原