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吉林电子信息职业技术学院毕业论文

烧结矿质量对高炉冶炼的影响

摘 要

烧结矿是高炉炼铁生产的主要原料之一，烧结矿的性能和质量直

接影响高炉冶炼的顺行、操作制度和技术经济指标。本论文通过对烧结矿的还原，滴落实验，验证不同粒度的半焦、无烟煤代替焦粉作燃料的铁矿烧结技术的比较优势。以及改变其粒度等方面对烧结进行分析、研究。

本项研究内容包括：原、燃料的物理化学性质、燃料的性能及反应性、烧结矿质量指标的评价；在不同原料配比条件下改变燃料粒度的烧结实验；烧结矿的物理化学性能和冶金性能等检测；对燃料种类和配比对烧结矿生产指标、烧结矿化学成分、矿物组成、还原性能、还原粉化性能、软熔滴落性能的影响进行评价，实验结果及其分析。 实验结果证明：半焦在>5mm粒级控制在15%的粒度下是很好的烧结燃料。无烟煤相对做烧结燃料效果不好；<3mm粒级控制在70%左右为宜。

关键词：烧结矿，无烟煤，焦粉，半焦，矿物组成，烧结矿冶金性能，改变粒度

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吉林电子信息职业技术学院毕业论文

目录

第一章 绪论 ·············································································································· - 6 - 1.1烧结生产的目的 ············································································································· - 6 - 1.2烧结用原料条件 ············································································································· - 7 - 1.3燃料的粒度 ······················································································································ - 7 - 1.4燃料的基本性质 ············································································································· - 8 -

1.4.1燃料的工业分析、元素分析 ......................................................................... - 8 -

1.4.2 燃料的灰成分和灰熔点 ······························································································· - 10 - 第二章烧结的作用 ································································································· - 11 - 2.1烧结矿的作用 ··············································································································· - 11 - 2.2烧结机的作用 ··············································································································· - 12 - 2.3烧结矿中MgO 作用机理 ···························································································· - 12 - 第三章 烧结生成工艺及生产的工艺流程 ························································· - 13 - 3.1烧结生成工艺 ··············································································································· - 13 - 3.2烧结生产的工艺流程 ·································································································· - 13 -

3.2.1烧结原料的准备 ..................................................................................... - 14 -

3.2.2配料与混合............................................................................................... - 14 - 3.2.3烧结生产 ................................................................................................... - 15 -

第四章 烧结矿对高炉冶炼的影响 ····································································· - 18 - 4.1烧结矿指标对高炉冶炼过程的影响······································································· - 18 - 4.2烧结矿指标和冶金性能的影响因素······································································· - 20 - 第五章 结论 ········································································································· - 24 - 参考文献 ················································································································· - 25 - 致谢 ································································································· 错误！未定义书签。

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