含铁尘泥球团成型用复合黏结剂开发及应用

doi:10.13228/j.boyuan.issn0449-749x.20230446

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Abstract The treatment of iron-bearing dusts and sludges by the rotary hearth furnace process has the advantage of sufficient utilization of valuable metals and a high impurity removal rate, and becomes one of the development trends of iron-bearing dust sludge treatment technology. However, the poor balling performance of iron-bearing dust sludge leads to low strength and easy pulverization of the pellets, which seriously restricts the environmental and efficient production of the rotary hearth furnace process. An important means of improving the performance of raw materials and increasing the yield and quality of pelletized ore is the use of excellent binder. The composite binder was prepared by matching organic binder and bentonite, and the effect of composite binder on the cold performance and reduction performance of pellets was investigated. It was shown that the composite binder pellets exhibited excellent green pellets performance. The drop strength and compressive strength of green pellets in the CB2-3 group (3% bentonite+0.5% binder B) reached 8.5 times/0.5 m and 78 N/P, respectively. It is because the organic binder has rich oxygen-containing groups, such as —OH, —COO—, etc., which improves the hydrophilicity of the surface of the iron-bearing dust sludge and strengthens the connection between the bentonite and the iron-bearing dust sludge concentrate particles. The binder C forms a mesh structure during the drying process, which promotes the proximity of dust particles to each other, and was the main factor in the dry-ball strength enhancement of the CB3 group(3% bentonite+2% binder C). Meanwhile, the reduction of iron oxides and zinc oxides was more fully due to the increase in the content of organic components. The main reason is the pyrolysis of organic components at high temperature, which accelerates the pyrolysis of solid fuels and the diffusion of reduction products. However, excessive pore generation will lead to a decrease in the strength of the pellets. Industrial tests shown that compared with the composite binder YG-1 used in the field, the addition of CB2-3 and CB3 can significantly improve the production quality index of the iron-bearing dust pellets, while the cost of the binder decreased from 140 yuan/t to 115 yuan/t and 120 yuan/t, respectively, which achieves the effect of quality improvement and costs reduction.

Key words： binder iron-bearing dust bentonite industrial experiment dezincification rate

Received: 08 August 2023

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	Articles by authors
	REN Xiaojian
	ZHOU Rongbao
	YANG Tao
	MA Lei
	LEI Jie
	LONG Hongming

Cite this article:

REN Xiaojian,ZHOU Rongbao,YANG Tao等. Development and application of composite binder for iron-bearing dust pellets molding[J]. Iron and Steel, 2024, 59(2): 164-172.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20230446 OR http://www.chinamet.cn/Jweb_gt/EN/Y2024/V59/I2/164

[1] 王静松,李岩,冯怀萱,等. 钢铁产业集聚区难处理尘泥处理与全量资源化利用进展[J]. 工程科学学报,2021,43(12):1737.(WANG J S,LI Y,FENG H X,et al. Progress in treating difficult-to-handle dust and sludge and full-scale resource utilization in an iron and steel industry cluster[J]. Chinese Journal of Engineering,2021,43(12):1737.)
[2] 尚海霞,李海铭,魏汝飞,等. 钢铁尘泥的利用技术现状及展望[J]. 钢铁,2019,54(3):9.(SHANG H X,LI H M,WEI R F,et al. Present situation and prospect of iron and steel dust and sludge utilization technology[J]. Iron and Steel,2019,54(3):9.)
[3] 王永红,王飞,毛瑞,等. 高锌污泥与焦化除尘灰的协同应用研究[J]. 烧结球团,2023:48(3):50.(WANG Y H,WANG F,MAO R,et al. Research on synergistic application of high-zinc sludge and coking dust[J]. Sintering and Pelletizing,2023:48(3):50.)
[4] MAO R,WANG F,XU Y,et al. Preparation process of cold bonded pellets with iron-bearing dust and sludge from steel production process[J]. Metallurgical Research and Technology,2021,118(6):602.
[5] PENG C,ZHANG F L,LI H F,et al. Removal behavior of Zn,Pb,K and Na from cold bonded briquettes of metallurgical dust in simulated RHF[J]. ISIJ International,2009,49(12):1874.
[6] STEWART D J C,BARRON A R. Pyrometallurgical removal of zinc from basic oxygen steelmaking dust:A review of best available technology[J]. Resources,Conservation and Recycling,2020,157:104746.
[7] WANG D,ZHU D,PAN J,et al. An investigation into the alkali metals removal from Zn-bearing dust pellets in direct reduction[J]. JOM,2022:1.
[8] 李强, 陈铁军, 李奇勇, 等. 钢铁行业含锌冶金尘泥资源化利用现状与研究进展[J]. 中国冶金, 2023, 33(7): 1.(LI Q, CHEN T J, LI Q Y, et al. Situation and research development on resource utilization of metallurgical dust containing zinc in iron and steel industry[J]. China Metallurgy, 2023, 33(7): 1.)
[9] 张玉柱, 寇鑫林, 田铁磊, 等. 钢铁尘泥脱锌工艺的研究进展与展望[J]. 钢铁, 2023, 58(6): 1.(ZHANG Y Z, KOU X L, TIAN T L,et al. Research progress and prospect of dezincing process of iron and steel dust and mud[J]. Iron and Steel, 2023, 58(6): 1.)
[10] 金永龙,刘思远,秦国旗,等.典型的处置钢铁企业含锌固废工艺的能效分析[J].冶金能源,2022,41(3):18.( JIN Y L, LIU S Y,QIN G Q,et al.Energy efficiency analysis of typical technologies for disposal ferrous solid waste combined with Zn in steel plants[J]. Energy for Metallurgical Industry,2022,41(3):18.)
[11] 魏汝飞, 张飞虎, 孟东祥, 等. 生物污泥还原钢铁厂含锌粉尘规律[J]. 钢铁, 2023, 58(6): 134.(WEI R F, ZHANG F H, MENG D X,et al. Law of zinc-bearing dust from iron and steel plant reduced by biological sludge[J]. Iron and Steel, 2023, 58(6): 134.)
[12] 毛瑞,张建良,刘征建,等. 钢铁流程含铁尘泥特性及其资源化[J]. 中南大学学报(自然科学版),2015,46(3):774.(MAO R,ZHANG J L,LIU Z J,et al. Characteristic and resource utilization technique of dust and sludge containing iron from steel production process[J]. Journal of Central South University(Natural Science),2015,46(3):774.)
[13] WANG D Z,ZHU D Q,PAN J,et al. An investigation into the alkali metals removal from zn-bearing dust pellets in direct reduction[J]. JOM,2022,74(2):634.
[14] WU Y L,JIANG Z Y,ZHANG X X,et al. Process optimization of metallurgical dust recycling by direct reduction in rotary hearth furnace[J]. Powder Technology,2018,326:101.
[15] 吴胜利,张风杰,张建良,等. 钢厂含锌粉尘基本物性及其成球性能研究[J]. 环境工程,2015,33(7):90.(WU S L,ZHANG F J,ZHANG J L,et al. Basic characteristics and balling performance of zinc-bearing dust in steel plant[J]. Environmental Engineering,2015,33(7):90.)
[16] WU T,KONG Y Q,ZHANG J C,et al. Agglomeration and bonding mechanism of typical metallurgical solid wastes[J]. Journal of Iron and Steel Research International,2023,30:1390.
[17] 毛瑞,王飞,金海,等. 转底炉工艺处理含铁尘泥关键技术[J]. 钢铁,2020,55(8):199.(MAO R,WANG F,JING H,et al. Key technology of treating iron-bearing dust and sludge by rotary hearth furnace process[J]. Iron and Steel,2020,55(8):199.)
[18] 刘自民,饶磊,桂满城,等. 马钢含铁尘泥综合利用研究与实践[J]. 中国冶金,2018,28(9):71.(LIU Z M,RAO L,GUI M C,et al. Research and practice of comprehensive utilization of Fe-containing dust in Masteel[J]. China Metallurgy,2018,28(9):71.)
[19] YANG T,AN J S,LI X W,et al. Effect of quaternary basicity on reduction behavior of iron-bearing dust pellets[J]. Journal of Iron and Steel Research International,2023,30:1356.
[20] FORSMO S,APELQVIST A J,BJÖRKMAN B,et al. Binding mechanisms in wet iron ore green pellets with a bentonite binder[J]. Powder Technology,2006,169(3):147.
[21] 黄柱成,王雨蒙,柴斌,等. 纤维化膨润土强化氧化球团制备及其机理[J]. 中南大学学报(自然科学版),2014,45(7):2145.(HUANG Z C,WANG Y M,CHAI B,et al. Preparation of oxide pellets with fibrosis bentonite and its mechanism[J]. Journal of Central South University (Natural Science),2014,45(7):2145.)
[22] 周隆林,莫伟,冼迪,等. 钠化膨润土物化性能与生球性能的相关性研究[J]. 烧结球团,2023,48(3):83.(ZHOU L L,MO W,XIAN D,et al. Correlation study between physical and chemical performance and green pellet performance of sodium bentonite[J]. Sintering and Pelletizing,2023,48(3):83.)
[23] 韩凤光,杨涛,赵贺喜,等. 复合黏结剂对球团高温固结的影响及机理[J].工程科学学报,2023,45(9):1450.(HAN F G,YANG T,ZHAO H X,et al. Effects and mechanism of composite binder on high-temperature consolidation of pellets[J]. Chinese Journal of Engineering,2023,45(9):1450.)
[24] 雷杰,汪名赫,周江虹,等. 新型复合黏结剂提高生球质量的作用机理及构效关系[J].工程科学学报,2023,45(1):91.(LEI J,WANG M H,ZHOU J H,et al. Mechanism and structure-activity relationship of a new composite binder to improve the quality of green pellets[J]. Chinese Journal of Engineering,2023,45(1):91.)
[25] WANG C,XU C Y,LIU Z J,et al. Effect of organic binders on the activation and properties of indurated magnetite pellets[J]. International Journal of Minerals,Metallurgy and Materials,2021,28:1145.
[26] ZHOU Y,ZHANG Y,LIU B,et al. Effect of modified humic acid binder on pelletisation of specularite concentrates[J]. Journal of Central South University,2015,22(4):1247.
[27] HALT J A,KAWATRA S K. Review of organic binders for iron ore concentrate agglomeration[J]. Mining,Metallurgy and Exploration,2014,31: 73.
[28] SRIVASTAVA U,KAWATRA S K,EISELE T C. Study of organic and inorganic binders on strength of iron oxide pellets[J]. Metallurgical and Materials Transactions B,2013,44:1000.
[29] QIU G,JIANG T,LI H,et al. Functions and molecular structure of organic binders for iron ore pelletization[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects,2003,224(1/2/3):11.
[30] QIU G,JIANG T,FN X,et al. Effects of binders on balling behaviors of iron ore concentrates[J]. Scandinavian Journal of Metallurgy,2004,33(1):39.
[31] LI S,PAN J,ZHU D,et al. Synthesis,characterization and properties of organically compounded bentonite by molecular intercalation process[J]. Journal of Iron and Steel Research International,2020,27(10):1127.
[32] QIU G,JIANG T,HUANG Z,et al. Characterization of preparing cold bonded pellets for direct reduction using an organic binder[J]. ISIJ International,2003,43(1):20.
[33] 张元波,欧阳学臻,路漫漫,等. 腐植酸改性膨润土在铁矿球团中的应用效果[J].烧结球团,2018,43(4):27.(ZHANG Y B,OUYANG X Z,LU M M,et al. Application effect of humic acid modified bentonite binder in iron ore pellets[J]. Sintering and Pelletizing,2018,43(4):27.)
[34] 顾正彪,吕欣欣,洪雁,等. 淀粉的胶体特性与调控[J].中国科学:化学,2023,53(7):1125.(GU Z B,LÜ X X,HONG Y,et al. Colloidal properties and regulation of colloidal properties of starch[J]. Science China Chemistry,2023,53(7):1125.)