【摘要】 以煤气化粗渣作为研究对象，先经酸浸，再对其中有价金属铬进行萃取分离。为实现高效萃取，设计一种协同萃取体系，并对萃取条件进行优化。采用优化的萃取工艺从煤气化粗渣的酸浸液中提取铬。结果表明：酸浸效果较佳的条件为盐酸浓度为4 mol/L、液固比为10 ml/g、时间为12 h、搅拌速率为600 r/min。设计由二(2,4,4-三甲基戊基)膦酸与甲基异丁基酮组成的协同萃取体系，并研究萃取铬的工艺参数。在萃取相比(O/A)为2:1、pH为6.05、二(2,4,4-三甲基戊基)膦酸萃取剂浓度为25%、甲基异丁基酮萃取剂浓度为30%、萃取时间为30 min时，铬的萃取率可达97.69%。更多还原

【Abstract】 In this study,the coal gasification slag is taken as the research object, after acid leaching, the valuable metal chromium was extracted and separated. In order to realize high efficiency extraction, a collaborative extraction system was designed and the extraction conditions were optimized. The optimized extraction technology was used to extract chromium from the acid leaching solution of coal gasification residue.The results showed that the optimum conditions for acid leaching were as follows: hydrochloric acid with a concentration of 4 mol/L as leaching reagent, a liquid-solid ratio of 10 ml/g, a time of 12 h, and an agitation rate of 600 r/min. A collaborative extraction system consisting of Di(2-ethylhexyl) phosphate and mono(2-ethylhexyl) 2-ethylhexyl phosphate was designed and the technological parameters of manganese extraction were studied. When the extraction ratio(O/A)was 2:1, the pH was 6.05, Di(2,4,4-trimethylamyl) phosphonic acid extractant concentration was 25 vol.%, methyl isobutyl ketone extractant concentration was 30 vol.%, extraction time was 30 min,the extraction rate of chromium can reach 97.69%.更多还原