【摘要】 提出一种铁物相重构强化含铍铁渣中铍、铁浸出分离的新思路，旨在实现铍的选择性分离回收。铁渣中，铁以FeOOH（66.4%，质量分数，下同）和（NH₄）Fe（SO₄）₂·12H₂O（33.6%）形态赋存，铍主要以Be（OH）₂形态赋存。在铍、铁酸性溶出过程中，存在铍、铁同步溶出或铍提取率低的问题。研究结果表明：在700℃时焙烧2 h，可将铁物相由FeOOH和（NH₄）Fe（SO₄）₂·12H₂O均转化为酸稳定性强的α-Fe₂O₃，而铍矿相则转化为BeO。在焙烧产物粒度小于75μm、H₂SO₄浓度为1.5 mol/L、固液比为1:5 g/mL、浸出时间为120 min的条件下，通过酸性浸出，铍提取率高达97.5%，铁提取率仅为2.1%。更多还原

【Abstract】 A novel strategy of iron phase reconstruction was proposed to enhance the leaching separation of beryllium and iron from beryllium-containing iron slag, aiming to achieve selective separation and recovery of beryllium. Iron primarily exists as FeOOH（66.4%） and（NH₄）Fe（SO₄）₂·12H₂O（33.6%）, while beryllium mainly occurs as Be（OH）₂. According to the acidic leaching behavior, there are simultaneous dissolution of Be and Fe or low beryllium extraction efficiency. The results show that through 2 h roasting at 700℃, the iron phases are transformed into acid-resistant α-Fe₂O₃, while beryllium-bearing phases convert to BeO. In optimal conditions, i.e., roasted product less than 75 μm, H₂SO₄ concentration is 1.5 mol/L, solid-liquid ratio is 1:5 g/mL and leaching time is 120 min, beryllium extraction is 97.5% and iron dissolution is only 2.1%.更多还原