含锰磁铁矿球团氧化固结机理分析

doi:10.13228/j.boyuan.issn1006-9356.20220032

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (3838 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要为促进含锰磁铁矿在球团上的应用,通过造球试验,并借助X射线衍射和扫描电子显微镜等检测手段,系统地分析了Mn₃O₄对球团矿氧化固结机理的影响。结果表明,随着Mn₃O₄质量分数从0%增加至7%,球团抗压强度从2 458 N/个降到1 810 N/个,孔隙率从22.7%增大至26.2%。随着Mn₃O₄的增加,在赤铁矿晶界和硅酸盐相中形成新的MnFe₂O₄固熔体,固熔体扩大了基体中的裂纹,破坏了赤铁矿的连续结晶;硅酸盐含量增加也极大地抑制了赤铁矿晶粒的生长,使含锰球团的基体由致密变为多孔,球团矿强度降低。故对生产企业来说,Mn₃O₄对球团的固结强化有负面影响,其适宜的质量分数应在3%以内。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	作者相关文章
	付旭刚
	马轲
	巨建涛
	邢相栋

关键词 ：球团矿, 磁铁矿, Mn₃O₄, 抗压强度, 固结机理

Abstract：In order to promote the application of manganese-containing magnetite in pellets, the effect of Mn₃O₄ on the oxidative consolidation mechanism of pellets was systematically analyzed by means of pelletizing tests and detection methods such as X-ray diffraction and scanning electron microscopy. The results show that when the mass fraction of Mn₃O₄ increases from 0% to 7%, the compressive strength of the pellets decreases from 2 458 N/piece to 1 810 N/piece, and the porosity increases from 22.7% to 26.2%. With the increase of Mn₃O₄, a new MnFe₂O₄ solid solution is formed in the hematite grain boundary and silicate phase. The solid solution expands the cracks in matrix and destroys the continuous crystallization of hematite. The increase of silicate content greatly inhibits the growth of hematite grains, which makes the matrix of manganese-containing pellets change from dense to porous, and its strength of pellets decrease. Therefore, for production enterprises, Mn₃O₄ has a negative impact on the consolidation and strengthening of pellets, and its appropriate mass fraction should be within 3%.

Key words： pellets magnetite Mn₃O₄ compressive strength consolidation mechanism

收稿日期: 2022-01-12

通讯作者: 巨建涛(1973—), 男, 博士, 教授级高级工程师; E-mail: Ju_jiantao163.com

作者简介: 付旭刚(1979—), 男, 大学本科, 高级工程师; E-mail: 66849160@qq.com

引用本文:

付旭刚, 马轲, 巨建涛, 邢相栋. 含锰磁铁矿球团氧化固结机理分析[J]. 中国冶金, 2022, 32(7): 80-86. FU Xu-gang, MA Ke, JU Jian-tao, XING Xiang-dong. Analysis on oxidative consolidation mechanism of manganese-containing magnetite pellets[J]. China Metallurgy, 2022, 32(7): 80-86.

链接本文:

http://www.zgyj.ac.cn/CN/10.13228/j.boyuan.issn1006-9356.20220032 或 http://www.zgyj.ac.cn/CN/Y2022/V32/I7/80

[1]	潘建,马雯卓,朱德庆,等. Al2O3对铁矿烧结球团及高炉冶炼的影响[J].钢铁研究学报,2021,33(10):14.
[2]	杨双平,高文彬,王玉萍,等.赤铁矿内配兰炭生产球团矿固结机制研究[J].钢铁研究学报,2021,33(12):8.
[3]	青格勒,王朝东,侯恩俭,等.低硅含镁球团矿抗压强度及冶金性能[J].钢铁研究学报,2014,26(4):7.
[4]	王鑫杰,王炜,陈汝刚,等.钾对球团矿冶金性能的影响研究[J].烧结球团,2021,46(4):44.
[5]	徐萌, 王伟, 孙健,等. 超大型高炉高球比低碳冶炼技术应用[J]. 中国冶金, 2021, 31(9):6.
[6]	乔红梅,张建良,王耀祖,等.国内外钙质碱性球团生产实践及发展趋势[J].钢铁研究学报,2021,33(10):9.
[7]	魏汝飞,柯技,李家新,等.不同反应性炭的气化差异及对铁矿还原的影响[J].钢铁,2022,57(3):27.
[8]	胡长松. 首钢高炉新炉料结构下球团技术的探索与应用[J]. 中国冶金, 2021, 31(6):7.
[9]	桑斌,常生朝,尤胜强. Al2O3对球团矿性能的影响[J].山西冶金,2021,44(5):29.
[10]	FU G Q,LI W,CHU M S, et al. Influence mechanism of SiO2 on the oxidation behavior and induration process of hongge vanadium titanomagnetite pellets[J]. Metallurgical and Materials Transactions B, 2020, 51(1): 114.
[11]	WANG S,GUO Y F,ZHENG F Q, et al. Improvement of roasting and metallurgical properties of fluorine-bearing iron concentrate pellets[J]. Powder Technology, 2020, 376:126.
[12]	CHENG Gong-jin, XUE Xiang-xin, JIANG Tao, et al. Effect of TiO2 on the crushing strength and smelting mechanism of high-chromium vanadium-titanium magnetite pellets[J]. Metallurgical and Materials Transactions B,2016,47(3):1713.
[13]	ZENG Rui-qi, LI Wei, WANG Nan, et al. Influence and mechanism of CaO on the oxidation induration of hongge vanadium titanomagnetite pellets[J]. ISIJ International,2020,60(10):2199.
[14]	李金莲,宫作岩,王亮,等. MgO添加方式对镁质球团矿的影响[J]. 钢铁, 2020, 55(8):6.
[15]	王欣宇, 曾宇, 李林春,等. 复合镁质添加剂对球团生产影响的试验分析[J]. 中国冶金, 2021, 31(8):4.
[16]	田筠清, 青格勒, 张彦,等. 含硼矿粉制备球团矿的特点及应用方法[J]. 中国冶金, 2020, 30(4):5.
[17]	滕飞, 曾志彦, 郭培民. 一种含锰铁精矿球团性能试验研究[J]. 烧结球团, 2021, 46(5):7.
[18]	ZHU D Q, CHUN T J, PAN J. Influence of basicity and MgO content on metallurgical performances of Brazilian specularite pellets[J]. International Journal of Mineral Processing, 2013, 125:51.