论文部分内容阅读
通过共沉淀和磁选从绿矾中回收磁铁矿。在共沉淀阶段,研究反应条件对铁回收的影响,确定最佳反应参数如下:n(CaO)/n(Fe~(2+))1.4:1、反应温度80°C、亚铁离子浓度0.4 mol/L、反应终点溶液中Fe~(3+)/Fe~(2+)摩尔比1.9~2.1。在磁选阶段,研究球磨时间和磁感应强度对铁回收的影响。球磨可以破坏混合产物中磁铁矿的包裹和夹杂行为。结果发现,混合产物球磨20 min后,磁选精矿的铁品位和铁回收率分别从51.41%和84.15%提高到62.05%和85.35%。
Magnetite is recovered from the green vanadium by coprecipitation and magnetic separation. In the coprecipitation phase, the influence of reaction conditions on iron recovery was studied and the optimum reaction parameters were determined as follows: n (CaO) / n (Fe ~ (2 +)) 1.4: 1, reaction temperature 80 ° C, ferrous ion concentration 0.4 mol / L, the molar ratio of Fe ~ (3 +) / Fe ~ (2+) in the reaction solution is 1.9 ~ 2.1. In the magnetic separation stage, the effect of ball milling time and magnetic induction on iron recovery was studied. Ball milling can destroy the inclusions and inclusions of magnetite in the mixed product. The results showed that the iron grade and the iron recovery of the magnetic separation concentrate increased from 51.41% and 84.15% to 62.05% and 85.35% respectively after the mixed product was ball milled for 20 min.