高品质酸再生氧化铁粉的关键技术研究(吸收塔洗涤塔)
关键词：酸再生；喷雾焙烧；氧化铁；吸收塔；洗涤塔；4774
Abstract
Since the 1990s, due to the increasing demand of high-quality iron oxide powder as raw materials for magnetic material industry, acid regeneration unit is widely used in the production of iron oxide. As the largest application of steel mills process, spray roasting method has been deeply studied. Among these researches, lots of works focus on the optimization of the quality of iron oxide powder, including purification and BET improvement. But reports referred material balance about acid regeneration process can hardly be found. Furthermore, the material balance as a key theory support achieves controlling exhaust emissions in acid regeneration process. Therefore, this paper via material balances to improve iron loss and acid loss occurred during the acid regeneration process. Meanwhile, these calculations as theoretical basis for analyzing exhaust gas treatment equipment were used to strive to accurately identify the causes of excessive waste acid and iron oxide dust, and a new door has been opened to protect the environment and reduce the air pollution.
KeyWords: Acid Regeneration; Spray roasting; Iron oxide powder; Absorber; Scrubbers;
目 录
1 文献综述 1
1.1 软磁材料的发展与研究现状 1
1.1.1 软磁材料的发展历程 1
1.1.2 软磁铁氧体的市场及生产市场需求 1
1.1.3 产业发展面临的问题 2
1.2 氧化铁的制备方法 2
1.3 酸再生氧化铁粉 6
1.3.1 酸再生工艺 6
1.3.2 酸再生机组 7
1.3.3 酸再生机组的工作原理 7
1.4 氧化铁品质的影响因素及提高品质的方法 9
1.4.1 氧化铁偏低 9
1.4.2 Cl - 偏高 9
1.4.3 比表面积偏低 9
1.5 选题背景与意义 10
2 实验部分 11
2.1 实验药品 11
2.2 实验设备 11
2.3 实验步骤 11
2.3.1 邻菲啰啉溶液的配制 11
2.3.2 NaAc溶液配制 11
2.3.3 HCl溶液配制 12
2.3.4 盐酸羟胺溶液配制 12
2.3.5 NaOH 标准液的配制 12
2.3.6 酚酞指示剂的配制 12
2.3.7 标准曲线绘制 12
2.3.8 机组废酸样品总铁含量的测定 14
3 实验结果与讨论 16
3.1 酸再生全过程的物料衡算 16
3.1.1 样品中铁浓度的计算 16
3.1.2 铁元素物料衡算 16
3.1.3 1800 HCl衡算 19
3.2 酸再生机组废气、废酸影响因素 20