| 361 | 5 | 41 |
| 下载次数 | 被引频次 | 阅读次数 |
粉煤灰盐酸法生产氧化铝工艺中的结晶氯化铝经焙烧后转化为氧化铝产品,焙烧方式对氧化铝的理化性质有较大的影响。研究了不同焙烧温度下结晶氯化铝的物相转化,并进行了低温、高温两步焙烧及烟气吸收试验。结果表明,两步焙烧产生的氧化铝内部为多层片状结构,疏松多孔,晶型为γ-Al_2O3,未生成α-Al_2O3,产品粒度大于一步焙烧产出的氧化铝,有利于氧化铝电解;烟气中氯化氢回收率95.79%,吸收效率较高。
Abstract：Crystalline aluminum chloride in alumina production process by fly ash hydrochloric acid method is calcined and converted into an alumina product,and calcination method has great influence on physical and chemical properties of alumina.Phase transformation of crystalline aluminum chloride at different calcination temperatures was studied,and two-step roasting at low temperature and high temperature and flue gas absorption tests were carried out.The results show that interior of alumina produced by two-step calcination has multi-layered sheet-like loose and porous structure with crystal form of γ-Al_2O3,andα-Al_2O3 is not formed.Particle size of product is bigger than that of alumina produced by one-step calcination,which is beneficial to alumina electrolysis.Recovery rate of hydrochloric acid is 95.79%,and absorption efficiency of hydrogen chloride in calcined flue gas is high.
[1]GAO W C,LI Z B,ASSELIN E.Solubility of AlCl3·6H2O in the Fe(II)+Mg+Ca+K+Cl+H2O system and its salting-out crystallization with FeCl2[J].Industrial&Engineering Chemistry Research,2013,52(39):14282-14290.
[2]GUO Y X,LV H B,YANG X,et al.AlCl3·6H2O recovery from the acid leaching liquor of coal gangue by using concentrated hydrochloric inpouring[J].Separation and Purification Technology,2015,151:177-183.
[3]PARK K Y,PARK Y W,YOUN S H,et al.Bench-scale decomposition of aluminum chloride hexahydrate to produce poly(aluminum chloride)[J].Industrial&Engineering Chemistry Research,2000,39(11):4173-4177.
[4]李明．高铝粉煤灰作为铝土矿替代资源的现状和前景展望[J]．轻金属，2013(6):1-5.LI M.Current status and prospect of high alumina fly ash as substitute resource of bauxite[J].Light Metals,2013(6):1-5.
[5]刘延红，郭昭华，池君洲，等．粉煤灰提取氧化铝工艺技术进展[J]．轻金属，2014(12):4-9LIU Y H,GUO Z H,CHI J Z,et al.Technology process of extracting alumina from coal ash[J].Light Metals,2014(12):4-9.
[6]许立军，王永旺，陈东，等．粉煤灰酸法提取氧化铝工艺综述[J]．无机盐工业，2019,51(4):10-13.XU L J,WANG Y W,CHEN D,et al.Research progress of the extraction process of alumina by acid from fly ash[J].Inorganic Chemicals Industry,2019,51(4):10-13.
[7]王永旺，姬学良，胡红霞，等．一种结晶氯化铝焙烧系统及方法：CN103466672A[P].2013-12-25.WANG Y W,JI X L,HU H X,et al.A calcination system and method for crystalline aluminum chloride:CN103466672A[P].2013-12-25.
[8]姬学良．粉煤灰酸法生产氧化铝焙烧炉的选型探讨[J]．世界有色金属，2016(24):18-20.JI X L.Acid method of fly ash in the production of alumina calciner selection[J].World Nonferrous Metals,2016(24):18-20.
[9]HARTMAN M,TRNKA O,SOLCOVA O.Thermal decomposition of aluminum chloride hexahydrate[J].Industrial&Engineering Chemistry Research,2005,44(17):6591-6598.
[10]METSON J,HYLAND M,GROUTSO T.Alumina Phase Distribution, Structural Hydroxyl and Performance of Smelter Grade Aluminas in the Reduction Cell[M].TMS Light Metals,2005.
[11]钱永康，姜振华，张范，等．一种回转窑焙烧六水结晶氯化铝制备氧化铝的装置及方法：CN104058436A[P].2014-09-24.QIAN Y K,JIANG Z H,ZHANG F,et al.Device and method for preparing alumina by roasting hexahydrate crystalline aluminum chloride in rotary kiln:CN104058436A[P].2014-09-24.
[12]郭昭华，魏存弟，张培萍，等．一种利用流化床粉煤灰制备冶金级氧化铝的方法：CN101811712A[P].2010-08-25.GUO Z H,WEI C D,ZHANG P P,et al.Method for preparing metallurgical grade alumina by using fluidized bed fly ash:CN101811712A[P].2010-08-25.
[13]郭强，肖永丰，王宝冬，等．结晶氯化铝分步煅烧制备冶金级氧化铝研究[J]．洁净煤技术，2017,23(6):101-106.GUO Q,XIAO Y F,WANG B D,et al.Preparation of metallurgical grade alumina by calcination of crystalline aluminum chloride[J].Clean Coal Technology,2017,23(6):101-106.
[14]杜艳霞，郭昭华，王宏宾．结晶氯化铝煅烧技术对氧化铝性能的影响研究[J]．轻金属，2019(2):18-22.DU Y X,GUO Z H,WANG H B.Study on the effect of calcination technology of crystalline aluminum chloride on the properties of alumina[J].Light Metals,2019(2):18-22.
基本信息:
中图分类号:TF821
引用信息:
[1]李文清,邹萍,池君洲,等.结晶氯化铝两步焙烧制备氧化铝的研究[J].有色金属(冶炼部分),2020(01):40-45.
基金信息:
国家科学技术部“十二五”科技计划项目(2011BAA04B05)
2020-01-12
2020-01-12