摘要：本文简述了大量铁尾矿堆存的危害及其资源化的基本现状和所面临的问题。对铁尾矿制备烧结砖的生产工艺进行了研究。对铁尾矿成分进行了全分析和XRD衍射分析，确定了其主要成分的含量。通过对原料的分析，确定了试样成型和烧成方案。并对不同配比、不同烧结温度下试样的烧成收缩率、吸水率与体积密度、抗压强度等性能指标进行了研究和分析。利用XRD、SEM等手段对烧结砖内部微观结构进行分析。实验结果表明，利用铁尾矿可取代粘土制备烧结砖。烧结砖的强度受烧成制度的影响很大。在1050℃附近烧结时，烧结砖的抗压强度有显著提高。67243

毕业论文关键词：铁尾矿；粘土；烧结砖；XRD；SEM；烧成收缩率；吸水率；体积密度；抗压强度。

毕业设计说明书（论文）外文摘要

Title：  Study on Preparation of Sintered Brick of Iron Ore Tailings.                                                                        

Abstract：

The article introduces the dangers of iron ore tailings, and the basic situation of its comprehensive utilization and the problems existing. The production process of preparation of iron ore tailings sintered brick is studied. The total analysis and XRD diffraction analysis are carried on to determine its main contents. Through the analysis of the iron ore tailings, the program of molding and sintering are determined. And the shrinkage, water absorption , bulk density, compressive strength and other performance indexes of the specimens which have different ratios under different sintering temperatures have been studied and analyzed. The internal microstructure of sintered brick is analyzed by XRD and SEM methods. The results show that the clay can be replaced by iron ore tailings in sintered brick. The strength of sintered brick greatly influenced by the firing system. Sintering at 1050 ℃ nearby, fired brick compressive strength has improved significantly.

Keywords： Iron ore tailings；Clay；Sintered brick；XRD；SEM；Firing shrinkage；Water absorption；Bulk density；Compressive strength.

目录

1  引言 1

1.1  铁尾矿简介 2

1.1.1  铁尾矿的来源、成分及种类 2

1.1.2  铁尾矿的危害[6] 4

1.1.3  铁尾矿利用经济分析 5

1.1.4  铁尾矿的利用 5

1.1.5  铁尾矿资源开发利用过程中存在的问题 7

2  铁尾矿、粘土分析实验 8

2.1  铁尾矿、粘土的成分全分析 8

2.1.1  SiO2的测定 8

2.1.2  Fe2O3的测定 9

2.1.3  Al2O3的测定 9

2.1.4  CaO的测定 10

2.1.5  MgO的测定 10

2.1.6  全分析结果及结论 10

2.2  铁尾矿的XRD分析 12

2.3  铁尾矿、粘土的塑性性能测定 12

2.3.1  塑限、液限、塑性指数、液性指数 12