基于矿相结构与冶金性能的酸性球团质量综合评价

doi:10.13228/j.boyuan.issn1006-9356.20200345

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1724 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要针对中国高炉冶炼沿用的“高碱度烧结矿+酸性球团+块矿”的炉料结构,立足于化学成分、微观矿相结构、物理性能及冶金性能,从多角度对5种进口酸性球团矿的质量进行综合评价。结果表明,北美酸球物理性能相对较好,转鼓指数分别为95.67%、95.55%;巴西酸球还原后的抗压强度普遍偏低,分别为282.8、347.6 N。巴西酸球主要以条状赤铁矿存在,铁相中不规则分布较多的孔洞;北美的K型高硅酸球矿晶发育良好;欧洲的U型酸球矿晶发育较差,赤铁矿结晶断裂严重,形成大量不规则气孔。巴西酸球还原膨胀指数较高,分别为24.21%、18.05%;V型酸球和C型酸球软化熔融区间适宜,料层对煤气流阻力较小,有利于还原气流顺行,冶金性能相对突出。因此,北美的C型酸球良好的冷态强度有利于长途储运,还原状态下的C型酸球膨胀系数较低且仍能保持较高的热态强度,熔融状态下的料柱对高炉煤气流阻力较小,符合中国高炉冶炼的炉料要求。

	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
	邸航
	王永红
	杜屏
	冯根生

关键词 ：酸性球团矿, 矿相结构, 物理性能, 冶金性能, 综合评价

Abstract：The blast furnace burden charge of "high basicity sinter + acid pellets + lump ore" is widely used in Chinese steel enterprises. The quality of 5 imported acid pellets is comprehensively evaluated based on chemical composition, microstructure, physical properties and metallurgical properties. The results show that the physical properties of acid pellets in North America are relatively good, the drum index is 95.67 % and 95.55 %, respectively. The compressive strength of reduced Brazilian pellets is weaker, which is 282.8 N and 347.6 N, respectively. The main mineralogical constitution of Brazilian pellets is strip hematite with more irregular pores in the iron phase. The K-type acid pellets in North America own well-developed ore crystal. The ore crystal in U-type acid pellets was maldevelopment and seriously hematite crystal fracture caused too many irregular pores. The reduction expansion index of Brazilian acid pellets is higher, which is 24.21 % and 18.05 %, respectively. The metallurgical properties of V-type and C-type acid pellets are prominent, the cohesive zone and softening zone are relatively suitable, the resistance of the material layer to the gas flow is small, which is favorable for gas flow in BF. Combined with the experimental results, the C-type acid pellets are favorable for long-distance transportation and storage due to better compressive strength. The C-type acid pellets own nice thermal strength and lower expansion coefficient under reduction state. The resistance of gas flow is lower when passing through the BF burden charged with C-type acid pellets in the molten state, which can meet the requirements of BF smelting in China.

Key words： acid pellets mineralogical constitution physical property metallurgical property comprehensive evaluation

收稿日期: 2020-06-08

通讯作者: 杜屏(1978—), 女, 博士, 高级研究员; E-mail: duping-iris@shasteel.cn

作者简介: 邸航(1993—), 男, 硕士, 助理研究员; E-maildihang1993@foxmail.com

引用本文:

邸航, 王永红, 杜屏, 冯根生. 基于矿相结构与冶金性能的酸性球团质量综合评价[J]. 中国冶金, 2021, 31(1): 9-13. DI Hang, WANG Yong-hong, DU Ping, FENG Gen-sheng. Comprehensive evaluation of acid pellet quality based on mineralogical structure and metallurgical properties[J]. China Metallurgy, 2021, 31(1): 9-13.

链接本文:

http://www.zgyj.ac.cn/CN/10.13228/j.boyuan.issn1006-9356.20200345 或 http://www.zgyj.ac.cn/CN/Y2021/V31/I1/9

[1]	王晓哲,张建良,刘征建,等. 块矿对高炉炉料冶金性能的影响[J]. 钢铁研究,2017,45(5):1.
[2]	邸航. 不同配矿条件下综合炉料高温冶金性能研究[D]. 鞍山:辽宁科技大学,2019.
[3]	薛方,王琨. 褐铁矿类型铁矿粉微观特性的分析研究[J]. 烧结球团,2019,44(1):19.
[4]	裴元东,廖继勇,张俊杰,等. 铁矿粉烧结过程CO减排探讨[J]. 烧结球团,2019,44(1):69.
[5]	张志刚,郑绥旭,丁志伟. 烧结烟气循环技术工业化应用概述[J]. 中国冶金,2016,26(7):54.
[6]	周渝生,钱晖,张友平,等. 现有主要炼铁工艺的优缺点和研发方向[J]. 钢铁,2009,44(2):1.
[7]	张高峰,陈善乾,丁红柱,等. 一种炉前除尘风机变频节能新工艺的探索[J]. 中国冶金,2017,27(6):66.
[8]	沙永志,宋阳升. 未来高炉炼铁工艺之管见[J]. 炼铁,2018,37(5):1.
[9]	张国成,罗果萍,邬虎林,等. 配加蒙古精矿对球团矿性能的影响[J]. 中国冶金,2019,29(11):24.
[10]	王晓磊,师学峰,胡长庆,等. 高硅镁质熔剂性球团成球过程及冷态性能实验[J]. 钢铁研究学报,2020,32(3):212.
[11]	孙健宁,刘小杰,严照照,等. 不同质量分数MgO对球团质量的影响[J]. 中国冶金,2020,30(2):1.
[12]	赵连达,刘迎立,薛庆国,等. 添加赤铁矿对氧化球团性能的影响[J]. 烧结球团,2020,45(2):36.
[13]	邢宏伟,刘振超,程菲雨,等. 基于微观技术的镁质熔剂性球团矿相研究[J]. 矿产综合利用,2019(2):148.
[14]	易陆杰,潘建,田宏宇,等. 内配碳对氧化球团冶金性能的影响[J]. 烧结球团,2020,45(3):28.
[15]	周朝刚,胡锦榛,王少军,等. 基于冷固球团强度和粉末化率的试验研究[J]. 中国冶金,2020,30(6):103.
[16]	张旭孝,韩宏亮,姜曦. 高炉添加金属化球团炉料的冶金性能试验[J]. 中国冶金,2015,25(5):15.
[17]	余珊珊,文志军,刘栋梁,等. 武钢高炉炉料冶金性能的研究[J]. 钢铁研究,2014,42(5):8.
[18]	田筠清,青格勒,刘长江,等. 使用石灰石生产低硅碱性球团矿试验[J]. 中国冶金,2018,28(4):13.
[19]	毕传光,龙红明,春铁军,等. MgO质量分数对氧化球团性能的影响[J]. 钢铁,2017,52(7):22.
[20]	邸航,何志军,阎丽娟,等. 基于大型铁矿石熔滴检测设备的综合炉料性能[J]. 钢铁,2018,53(10):90.
[21]	刘杰,张洪宇,周明顺,等. 基于软熔滴落性能的高炉合理炉料结构[J]. 钢铁,2016,51(9):11.