摘要
用氢氟酸溶液对烟煤Ａ进行脱灰研究，试验在温和的条件下进行，反应时间和酸的浓度对脱灰有明显的影响．脱灰率ｒ和酸浓度ｘ满足：ｒ＝９８．５－７８．９ｅ－０．１３１ｘ．τ时间后煤中矿物质会量 ｃ（ｗｔ－％）为：１００（ｃ／ｃｏ）＝１０６．６４８５τ－０．６９１．在试验条件下得到最佳操作条件为：酸浓度２０％：时间 ５０ｍｉｎ；温度 ６０℃产物煤的灰分可降到１．０％以下。
A deashing process of bituminous coal A with hydrofluoric acid under mild conditions is carried out.The time of reaction and concentration of HF acid effect significantly on deashing ratio. Under the experimental conditions the relationship between deashing ratio (r) and acid concentration (x) is r=96. 5 - 78.9e-0.131x.The content(wt-% ) of mineral matter (ash) after reaction τmin is 100c/co = 106.548 5τ-0.691.The optimum conditions have been obtained: x20%;τ 50 min;t 60℃.On these conditions, ash content of bituminous coal A is decreased to less than 1%.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
1991年第1期19-23,共5页
Journal of Dalian University of Technology
关键词
烟煤
煤脱灰
氢氟酸
煤化工
脱灰
coal chemical industry
bituminous coal
hydrofluoric acid/ deashing of coal
