广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2012年
10期
92-94
,共3页
硫酸亚铁%絮凝沉淀%硅
硫痠亞鐵%絮凝沉澱%硅
류산아철%서응침정%규
ferrous sulfate%flocculation and precipitation%silicon
用湿法冶金工艺从硫酸亚铁制备软磁用α-Fe2O3的研究中,除硅是主要技术难点。本文研究了影响除硅的各种因素,通过试验得出,硫酸亚铁溶液先用氨水调节pH=6.0,通入空气,pH值降到5.0,加入20～30 mg/kg的聚丙烯酰胺絮凝沉淀分离,净化后的硫酸亚铁溶液制备得到的α-Fe2O3产品中二氧化硅的含量降到了0.01%以下。
用濕法冶金工藝從硫痠亞鐵製備軟磁用α-Fe2O3的研究中,除硅是主要技術難點。本文研究瞭影響除硅的各種因素,通過試驗得齣,硫痠亞鐵溶液先用氨水調節pH=6.0,通入空氣,pH值降到5.0,加入20～30 mg/kg的聚丙烯酰胺絮凝沉澱分離,淨化後的硫痠亞鐵溶液製備得到的α-Fe2O3產品中二氧化硅的含量降到瞭0.01%以下。
용습법야금공예종류산아철제비연자용α-Fe2O3적연구중,제규시주요기술난점。본문연구료영향제규적각충인소,통과시험득출,류산아철용액선용안수조절pH=6.0,통입공기,pH치강도5.0,가입20～30 mg/kg적취병희선알서응침정분리,정화후적류산아철용액제비득도적α-Fe2O3산품중이양화규적함량강도료0.01%이하。
The removal of silicon was a key step in the process of preparation of the α-Fe2O3 for soft magnet from pyrite residue using hydrometallurgy techniques.The influencing factors of the removal silicon were discussed.The optimum process conditions determined by tests were as follows： ferrous sulfate solution pH adjustment 6.0 by annonia,solution pH 5.0 for atmosphere oxidation,and the dosage of polyacrylamide was 20~30 mg/kg.The content of silicon dioxide in the ferric oxide can be reduced to less than 0.01%.
