钢渣有价组分的分部高附加值利用

doi:10.12034/j.issn.1009-606X.217124

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摘要采用选择性碳热还原方法高附加值利用转炉钢渣中有价组分，实验考察了还原温度和时间对转炉钢渣中主要有价元素Fe, P, Mn, Cr等的还原行为及析出多元铁合金(目标相)成分的影响，通过磨矿、磁选分离得到目标相和余渣，以目标相为主要原料合成锂离子电池正极材料掺杂型磷酸铁锂. 结果表明，产物0.1C下首次放电容量达159.58 mA?h/g，倍率循环性能良好；余渣主要成分为Ca(OH)2, 2CaO?SiO2和3CaO?SiO2，平均粒径约2.5 ?m且分布均匀，资源特性和利用价值明显提升.

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	何延波吴照金高志芳岳海峰刘伟明王平

关键词 ：转炉钢渣, 综合利用, 碳热还原, 磷酸铁锂

Abstract：A new method for respective and high value-added utilization of the valuable components in BOF steel slag was proposed. Using the selective carbothermic method, the reduction behavior of the valuable elements Fe, P, Mn, Cr etc in BOF steel slag and the composition of the ferroalloy (target phase) precipitated from the slag effected by reduction temperature and time were investigated. Target phase and residues were obtained from the reduced slag by milling and magnetic separation. The metals-doped LiFePO4/C, a cathode material of lithium ion battery was synthesized by using the target phase recovered from the slag as main raw material. The results showed that exhibiting first discharge capacity of 159.58 mA?h/g at 0.1C and excellent rate performance. The residue was fine powders with mean size of about 2.5 ?m and uniform size distribution, and its main phases include Ca(OH)2, 2CaO?SiO2 and 3CaO?SiO2, showing significantly improved resource characteristics and utilization value.

Key words： BOF steel slag recycling carbothermic reduction LiFePO4

收稿日期: 2017-02-06 出版日期: 2017-10-10

基金资助:CMASFX固废体系中有价金属的选择性析出及走向调控机制研究;含锌尘泥可控构筑多元掺杂α-Fe2O3@ZnFe2O4异质结光催化材料的基础研究;利用冶金含铁固废制备多元掺杂型Fe基载氧体的基础研究

通讯作者: 吴照金 E-mail: wzjof@hotmail.com

引用本文:

何延波吴照金高志芳岳海峰刘伟明王平. 钢渣有价组分的分部高附加值利用[J]. 过程工程学报, 2017, 17(5): 1028-1034.
Yanbo HE Zhaojin WU Zhifang GAO Haifeng YUE Weiming LIU Ping WANG. Respective and High Value-added Utilization of the Valuable Components in BOF Steel Slag. Chin. J. Process Eng., 2017, 17(5): 1028-1034.

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http://www.jproeng.com/CN/10.12034/j.issn.1009-606X.217124 或 http://www.jproeng.com/CN/Y2017/V17/I5/1028

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