摘要本文主要探究在对用氧化镁制备氢氧化镁的过程中，通过研究不同因素对制得成品纯度的影响，找出最佳制备工艺路线，同时考虑经济性与适用性，对取向硅钢用氧化镁的废弃物进行回收。本文主要采用的实验方法为中和水解除杂法来对氧化镁进行酸溶除杂，采用氨水沉淀法来将氧化镁溶解液制得氢氧化镁。最后通过一系列的实验得出在氧化镁酸溶时，盐酸含量，反应时间，搅拌方式对酸溶影响最大，盐酸浓度与含量越高，反应时间越长，有搅拌的情况下，氧化镁酸溶越好。在对氧化镁溶液除杂过程中在PH=9左右，铁离子沉淀完全，在制备氢氧化镁过程中，在PH=11左右镁离子沉淀完全。通过一步步实验制备氢氧化镁，然后对制得的氢氧化镁进行性能研究。最后得出氧化镁制备氢氧化镁的最佳工艺路线，实现氧化镁的资源化回收。21420
毕业论文关键词：氧化镁；氢氧化镁：中和水解；氨水沉淀；资源化回收
Abstract
This paper explored for use magnesium oxide in the preparation of magnesium hydroxide ,by studying the different factors affecting the purity of prepared products, find the best route preparation process ,taking into account the economy and the applicability of oriented silicon steel with magnesium recycling waste.The method used in this experiment are: neutralization hydrolysis method, its purpose is to be dissolved magnesium,the other method is: ammonia precipitation method, its purpose is to prepare magnesium hydroxide.Finally, through a series of experiments concluded that the content of hydrochloric acid, reaction time, mixing methods has a great impact when the acid-soluble magnesium oxide .the higher concentration and content of hydrochloric acid , the longer reaction time and the stirring, the better dissolved of magnesium oxide ,In the process for removing impurities in magnesium oxide when the solution is about PH=9, the iron ions is precipitated completely.In the course of preparating magnesium hydroxide ,when the solution is about PH=11, the magnesium ions is precipitated completely.We researched the performance of the magnesium hydroxide obtained by experiment.find out the best routing to preparate magnesium hydroxide by magnesium oxide,finally it is feasible to achieve the recovery of magnesium waste.Resource recycling-oriented silicon steel with magnesium oxide
KeyWords：Magnesium oxide;magnesium hydroxide;NHM;APM;Recycle
目 录
1. 绪论 1
1.1 取向硅钢用氧化镁的研究进展 1
1.1.1 氧化镁的分类、用途 1
1.1.2 氧化镁的制备方法 2
1.1.3 取向硅钢用氧化镁的作用与特性 2
1.2 取向硅钢用氧化镁废弃物的产生 4
1.2.1 硅钢简介 4
1.2.2 硅钢轧制流程 4
1.2.3 高温退火对硅钢的影响 4
1.2.4 取向硅钢用氧化镁废弃物的产生 5
1.3 取向硅钢用氧化镁废弃物的回收利用 5
1.3.1 氢氧化镁阻燃剂 5
1.3.2 取向硅钢用氧化镁 6
1.3.3 取向硅钢用氧化镁废弃物的回收 6
2. 实验部分 6
2.1 实验药剂与设备 6
2.2 实验过程 7
2.2.1 氧化镁废弃物的成分分析 7
2.2.2 氧化镁废弃物的除杂 8
2.2.3 硅钢氧化镁废弃物酸溶制备粗Mg2+溶液实验 8
2.2.4 粗Mg2+溶液的纯化制备高纯Mg2+溶液实验 8
2.2.5 高纯Mg2+溶液制备阻燃级Mg(OH)2实验 11
2.3 表征方法及原理 12
2.3.1 表征方法 12 取向硅钢用氧化镁的资源化回收:http://www.youerw.com/cailiao/lunwen_13613.html