粉煤灰盐酸浸出液酸分法结晶氯化铝的试验优化  被引量:4

Crystallization of Aluminum Chloride From Hydrochloric Acid Leaching Solution of Fly Ash

在线阅读下载全文

作  者:谢振山[1,2] 李军旗[1,2] 陈朝轶[1,2] 徐本军[1,2] 伍宇敏 XIE Zhenshan LI Junqi CHEN Chaoyi XU Benjun WU YUmin(College of Materials and Metallurgy ,Guizhou University ,Guiyang 550025,China Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025 ,China)

机构地区:[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省冶金工程与过程节能重点实验室,贵州贵阳550025

出  处:《湿法冶金》2017年第4期316-319,共4页Hydrometallurgy of China

基  金:国家自然科学基金资助项目(51474079;51574095;51664005);贵州冶金资源综合利用工程研究中心项目(黔教合KY字(2015)334号);高硫铝土矿一步脱硫及硫对设备材质的腐蚀研究项目(黔科合LH字[2014]7609)

摘  要:研究了采用酸分法,通过向净化后的粉煤灰盐酸浸出液中通入HCl气体结晶AlCl_3·6H_2O。试验结果表明:各因素对氯化铝结晶率的影响主次顺序为HCl气体通入速率>HCl气体通入量>结晶温度>静置时间;在HCl通入速率60mL/min、HCl通入量24.27L、结晶温度20℃、静置时间3h条件下,氯化铝结晶率达90.25%;降低HCl通入速率和增大通入量均有利于结晶率提高,当HCl气体通入速率低于45mL/min时,会发生倒吸,反之会导致返溶;结晶产物AlCl_3·6H_2O占98.7%,杂质主要为CaCl2·4H_2O、MgCl_2·2H_2O、FeClO。Crystallization of AlCl3·6H2O from purified hydrochloric acid leaching solution of fly ash by bubbled into hydrogen chloride gas was researched. The results show that the order of influencing factors on crystallization of aluminum chloride is HC1 gas aeration rate〉HCl gas amount of inlet aeration〉 crystallization temperature 〉 standing time. The reducing HCI gas aeration rate and increasing amount of inlet aeration are favorable for crystallization of AlCl3·6H2O. Low aeration rate is more conducive to crystallize AlCl3·6H2O. HCl gas may reverse flow when it aeration rate is less than 45 mL/min,but AlCl3·6H2O crystal may re-dissolute when HC1 gas aeration rate is greater than 45 mL/min. Under the conditions of HCl gas amount of inlet aeration of 24. 27 L, aeration rate of 45 mL/min, standing time of 3 h and crystallization temperature of 20℃, the crystallization rate of AlCl3·6H2O is 90. 25% ,its purity is 98. 7% with minor impurities AlCl3·6H2O,AlCl3·6H2O and FeClO.

关 键 词:粉煤灰 酸分法 结晶氯化铝 同离子效应 工艺 优化 

分 类 号:TQ133.1[化学工程—无机化工]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象