【作者】 杨雷库；

【导师】 李稳宏；

【作者基本信息】 西北大学 ， 化学工艺， 2004， 硕士

【摘要】 以铁氧体原料α-Fe₂O₃的国家标准分析方法为基础，得到了精铁矿粉中微量SiO₂含量测定的一种新方法，重点探讨了操作过程和条件，通过与仪器分析结果对比可知：本法具有精确度高、重复性好、操作简便和测定范围宽等优点，为精铁矿粉的除硅加工提供了分析上的保证；以精铁矿粉为原料，研究出了通过碱洗除硅、再经催化氧化制备高质量α-Fe₂O₃的工艺，并通过正交实验得到了优化的工艺条件，产品主要指标为：Fe₂O₃≥99.82％，SiO₂≤0.0028％，粒径＜1μm，达到了电子工业所要求的超高纯级质量标准；以精铁矿粉催化氧化过程的实验数据为基础，通过数学方法处理，得到了该反应过程的动力学模型，为该过程的进一步放大和优化操作提供了可靠的依据；在前期实验和理论研究的基础上，在江苏宜兴建了一套500t／a α-Fe₂O₃中试生产装置，在西安周至建立了一套2000t／a的生产装置，对该过程进行了工业化放大研究，其结果与扩大试验结果吻合良好；详细地探讨了以染料工业废铁泥为原料经催化氧化制备铁红颜料的工艺过程及其优化工艺条件，应用实验表明该产品可用于油漆、涂料和地板砖的生产，具有显著的经济效益、社会效益和环境效益。更多还原

【Abstract】 A new method of trace silica test in refined iron ore powder has been successfully researched on the basis of chemical analysis methods, introduced in the GB, of raw materials used in ferrite materials. The research is focused on probing into the optimum technological conditions. Compared with the test result of modern analytic apparatus, it is known that this method possesses some properties such as high accuracy and good repetition and other advantages of operating simply and having wide test range which are contrary to the traditional methods. All above mentioned ensure processing refined iron ore powder.With the raw material of high-grade ore powder from Chengde in Hebei province and east Qinling Mountain in Shannxi, a new technology of preparing higher-grade a - Fe2O3 has been successfully studied by way of first removing silicon with dissolution of sodium hydroxide and then catalytically oxidating. The study mainly inquires into the optimum technological conditions of removing silicon, the production have some good indexes ,for example, Fe2O3 > 99.82%; SiO2< 0.0028%; size: < 1um, which certainly meets the needs of the raw materials for producing high-grade ferrite.With the same raw material as the former, on the basis of the data achieved from the experiment ,the chemical kinetics formula of producing a - Fe2O3 by catalytic oxidation has been built by means of mathematics techniques according to the process mechanism reported. It could service as the basis by which the process will be amplified further and is controlled better.According to the achievements in theoretic and experimental research of catalytic oxidation of high-grade magnetite, two set of production installations have been set up, the one in Yixing city with the capacity of 500 tons of a -Fe2O3 per year ,and the other in Zhouzhi of Xian with the capacity of 2000 tons. This research show the industrial results of the process are in good accordance with the results of primary and medium experiments.The technology of preparing red ferric oxide and its optimum technological conditions have been inquired with the raw material of waste iron mud from chemical industry by catalytic oxidation, and through the applied research, the facts that this production red ferric oxide can be fit to make coating, paint and floor brick, being with great economic , social and environmental profits are showed.更多还原