摘要
钛白副产硫酸亚铁的提纯及再利用对于提高该含铁产品的附加值以及资源的综合利用都具有重要意义。对钛白副产硫酸亚铁中锰的脱除及铁的再利用进行研究。理论分析了双氧水氧化Fe^(2+)为Fe^(3+)及高锰酸钾氧化Mn^(2+)为MnO_(2)的可行性,通过试验考察了氧化剂用量、体系pH值、反应时间对锰脱除的影响。结果表明:在KMnO_(4)用量为理论值的1.0倍、pH=1.20、氧化时间30 min的条件下,锰的脱除率可达到99.9%,净化后溶液中锰含量降低至0.28 mg/L。以净化所得硫酸铁溶液作铁源,用液相沉淀法合成磷酸铁,可获得纳米级高纯度的无定型态二水磷酸铁前驱体,且该前驱体经煅烧可转变为α-石英型正磷酸铁。
The purification and reuse of titanium dioxide by-product ferrous sulfate are of great significance for improving the added value of the iron-containing products and the comprehensive utilization of resources.The removal of manganese and the reuse of iron in titanium dioxide by-product ferrous sulfate were studied.The feasibility of oxidizing Fe^(2+)to Fe^(3+)by hydrogen peroxide and oxidizing Mn^(2+)to MnO_(2) by potassium permanganate was theoretically analyzed.The effects of oxidant dosage,pH value of the solution and reaction time on the removal rate of manganese were investigated.The experimental results show that the manganese removal rate could reach 99.9%under the conditions of KMnO_(4) dosage 1.0 times of the theoretical value,pH value of 1.20 and oxide reaction time for 30 min.The manganese content in the purified ferric sulfate solution was reduced to 0.28 mg/L after manganese removal treatment.The purified solution was used as the iron source to synthesize iron phosphate by liquid-phase precipitation method,and the nanoscale high-purity amorphous iron phosphate dihydrate precursor was obtained,which can be transformed intoα-quartz-type iron phosphate after calcination.
作者
袁文龙
王碧侠
赵瑛
马红周
党晓娥
YUAN Wenlong;WANG Bixia;ZHAO Ying;MA Hongzhou;DANG Xiaoe(College of Metallurgical Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China)
出处
《有色金属工程》
CAS
北大核心
2023年第7期61-68,共8页
Nonferrous Metals Engineering
基金
陕西省自然科学基础研究项目(2021JM-374)。
关键词
硫酸亚铁
钛白
净化
氧化除锰
磷酸铁
ferrous sulfate
titanium dioxide
purification
removal of magnesium by oxidation
iron phosphate
作者简介
袁文龙(1998-),男,硕士研究生,主要从事冶金资源综合利用研究;通信作者:王碧侠(1976-),女,博士,教授,主要从事有色冶金新工艺与技术研究。
