摘要
采用浓碱－稀酸法（４０％ＮａＯＨ，ｌ２４℃，１０％ＨＣｌ酸洗）及稀碱－稀酸法（１０％ＮａＯＨ，１７０℃，压力≤０．８ＭＰａ，１０％ＨＣｌ酸洗），脱除萍乡煤和阳泉煤中的矿物质，其脱除率分别可达８１．０％及９０．０％。考察了碱浓度、处理温度及反应时间对脱除率的影响。通过Ｘ射线衍射和电子能谱分析探讨了矿物质脱除机理。结果表明，酸不溶性矿物质中高岭石、伊利石较容易脱除，石英、黄铁矿较难脱除。
The demineralization ratios of Pingxiang and Yangquan coals can reach 81.0%and 90.0%respectively by concentrated alkali-dilute acid treatment(40%NaOH 124℃,10%HCl leaching)and by dilute alkali-dilute acid treatment(10%NaOH,170℃,pressure≤0.8MPa,10%HCl leaching).The mechanism of dernineralization is studied by the measurement of X-ray diffraction and electron spectroscopy analysis,and the results show that kaolinite and illite are easier to be removed than quartz and pyrite in the coals.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
1995年第3期311-315,共5页
Journal of East China University of Science and Technology
