首页> 外文期刊>ISIJ international >Slag/Metal Separation from H_2-Reduced High Phosphorus Oolitic Hematite
【24h】

Slag/Metal Separation from H_2-Reduced High Phosphorus Oolitic Hematite

机译:H_2还原高磷橄榄石赤铁矿的渣/金属分离

获取原文
获取原文并翻译 | 示例
       

摘要

A process of H_2 reduction followed by the slag/metal separation for the utilization of high-phosphorus oolitic hematite has been proposed. The H_2 reduction was conducted at 1 073 K in a horizontal rotary electric resistance furnace, which significantly promotes the metallization ratio of reduced ore fines. Ther-modynamic calculation of H_2 reduction for apatite and XRD analysis of ore samples before and after H_2 reduction confirmed that gangue minerals containing R Al and Si in oolitic hematite hardly be reduced. The slag/metal separation was carried out in an induction furnace at 1 873 K. After separation, metal block and slag were obtained, and most of gangue minerals combined with lime and calcium fluoride formed the slag, but some impurities remained in the form of slag inclusions in the metal. Based on the SEM-EDS examination of P-containing slag inclusions and ternary phase diagram of Fe-P-0 system computed by FactSage™ 6.4 at 1 873 K, phosphorus in the metal product can be precipitated as iron phosphate or iron phosphide, and the evolution of P-containing slag inclusions is Fe_2P(l) + Fe_3(PO_4)_2(l)->Fe_3(PO_4)_2(l)->FeO(l) along with the increase of slag basicity, melt separation time and additive CaF_2. A satisfactory metal product with 99.80 wt% T. Fe, 0.027 wt% R 0.0013 wt% Si, 0.004 wt% Al and 0.05 wt% O was achieved by the slag/metal separation under the optimum conditions: slag basicity of 2, melt separation time of 10 min, CaF_2 mixing ratio of 4 wt% and metallization ratio of reduced fines of 85.9%.
机译:提出了利用高磷橄榄石赤铁矿进行H_2还原,炉渣/金属分离的工艺。在水平旋转电阻炉中于1073 K进行H_2还原,这显着提高了还原矿粉的金属化率。磷灰石H_2还原的热力学计算和H_2还原前后矿石样品的XRD分析证实,在赤铁矿赤铁矿中含有R Al和Si的脉石矿物几乎不会还原。炉渣/金属的分离在感应炉中于1873 K进行。分离后,得到金属块和炉渣,大多数most石矿物与石灰和氟化钙结合形成炉渣,但一些杂质仍然以金属中的夹渣。根据SEM-EDS对含P渣夹杂物的检查以及由FactSage™6.4在1 873 K下计算的Fe-P-0系统的三元相图,可以将金属产物中的磷沉淀为磷酸铁或磷化铁,并且随着渣碱度,熔体分离时间和熔渣含量的增加,含P渣夹杂物的演化为Fe_2P(l)+ Fe_3(PO_4)_2(l)-> Fe_3(PO_4)_2(l)-> FeO(l)。添加剂CaF_2。通过在最佳条件下进行炉渣/金属分离,可得到令人满意的金属产品,其中铁含量为99.80%(重量),铁含量为0.027%(重量),硅含量为0.0013%(重量),铝含量为0.004%(重​​量),铝含量为0.05%(重量)。 10分钟的时间,CaF 2的混合比例为4重量%,并且金属化率的还原细粉为85.9%。

著录项

  • 来源
    《ISIJ international》 |2017年第12期|2131-2140|共10页
  • 作者单位

    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, 430081 P. R. China,Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, Hubei, 430081 P. R. China;

    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, 430081 P. R. China,Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, Hubei, 430081 P. R. China;

    The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, Hubei, 430081 P. R. China,Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, Hubei, 430081 P. R. China;

    Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, Hubei, 430081 P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    oolitic hematite: H_2 reduction: slag/metal separation: slag inclusions;

    机译:橄榄岩赤铁矿:H_2还原:炉渣/金属分离:炉渣夹杂物;
  • 入库时间 2022-08-17 23:58:01

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号