硫酸烧渣酸浸液制备氧化铁红的工艺研究  

Study on Preparation of Ferric Oxide Red from Sulfuric Acid Leaching Solution

作　　者：马雯浩 陈凯旋 印体健 魏腾龙 方晓宇 王百年 MA Wen-hao;CHEN Kai-xuan;YIN Ti-jian;WEI Teng-long;FANG Xiao-yu;WANG Bai-nian(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《安徽化工》2020年第5期36-40,共5页Anhui Chemical Industry

基　　金：合肥工业大学2019年省级大学生创新创业训练计划项目(项目编号:S201910359128)。

摘　　要：以硫酸烧渣为原料,经酸浸、氧化、沉铁、除杂、煅烧制备α-Fe2O3。研究了沉铁、除杂和煅烧工艺,优化了工艺条件。结果表明,在初始铁离子浓度为1.81 mol/L,H2O2与Fe2+摩尔比为0.9,体系pH值为6.0,反应温度为35℃,反应时间为2.5 h的条件下,铁回收率为97.5%;使用过量NaOH溶液搅拌洗涤氢氧化铁,Al含量可低至0.02%;在750℃煅烧3 h,可获得纯度为97.7%的红棕色氧化铁红产品。As an effective comprehensive utilization method of sulfuric acid slag,α-Fe2O3 was prepared using sulfuric acid leaching liquid as raw materials via oxidation,precipitation,impurity removal and calcining.The above process conditions were investigated and optimized respectively.The results showed that the iron recovery rate can reach 97.5%under the conditions:initial iron concentration was 1.81 mol/L,the molar ratio of H2O2 to Fe2+was 0.9,system pH value was 6.0,reaction temperature was 35℃and aging time was 2.5 h.Excessive NaOH solution was used to stir and wash iron hydroxide,and Al content could be as low as 0.02%.Under the condition of calcining temperature 750℃and calcining time 3 h,the purity of reddish-brown iron oxide red product could reach 97.7%.

关 键 词：硫酸烧渣 酸浸 氢氧化铁 氧化铁红 

分 类 号：TQ622[化学工程—精细化工]