东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (4): 490-495.DOI: 10.12068/j.issn.1005-3026.2016.04.008

• 材料与冶金 • 上一篇    下一篇

基于热压块的不锈钢粉尘还原实验

李晰哲1, 2, 储满生1, 李花兵1, 罗主现2   

  1. (1. 东北大学 冶金学院, 辽宁 沈阳110819; 2. 金策工业综合大学 金属工程系, 平壤999093)
  • 收稿日期:2015-09-28 修回日期:2015-09-28 出版日期:2016-04-15 发布日期:2016-04-05
  • 通讯作者: 李晰哲
  • 作者简介:李晰哲(1982-), 男, 朝鲜人, 东北大学博士研究生; 储满生(1972-),男,安徽岳西人,东北大学教授,博士生导师.
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目 (N110202001).

Reduction Experiment of Stainless Steel Dust Based on Hot Briquetting

RI Sok-chol1, 2, CHU Man-sheng1, LI Hua-bing1, RA Ju-hyon2   

  1. 1. School of Metallurgy, Northeastern University, Shenyang 110819, China; 2. School of Metallurgical Engineering, Kim Chaek University of Technology, Pyongyang 999093, DPRK.
  • Received:2015-09-28 Revised:2015-09-28 Online:2016-04-15 Published:2016-04-05
  • Contact: CHU Man-sheng
  • About author:-
  • Supported by:
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摘要: 为了从不锈钢粉尘中回收利用Fe,Cr和Ni等,对不锈钢粉尘热压块制备及其自还原过程进行了研究.在热压温度为200℃,热压压力为35MPa条件下,抗压强度达到900N/个以上.高温条件下,煤热解产生的挥发分可参与不锈钢粉尘还原反应,当还原温度为1400,1450℃时,挥发分还原作用率达到0.4.据XRD分析和热力学计算,自还原过程中含铬物质的物相转变顺序为FeCr2O4,Cr2O3,Cr7C3,[Cr]Fe-Cr-Ni-C.当还原温度为1450℃,烟煤中固定碳与粉尘中可去除氧的物质量的比(xc/xo)为0.72时,不锈钢粉尘热压块不能完全还原;当xc/xo大于0.8,还原20min时,不锈钢粉尘热压块能完全还原.

关键词: 不锈钢粉尘, 热压块, 自还原, 挥发分,

Abstract: To efficiently recycle valuable metal such as Fe, Cr and Ni in stainless steel dust, the preparation and self-reduction of coal composite stainless steel dust hot briquette(CCSB) were researched. Under 200℃ hot briquetting temperature, 35MPa hot briquetting pressure, the compressive strength was above 900N/P. Volatile matter of coal pyrolysis could take part in reduction of stainless steel dust under high temperature, and reduction action rate of volatile matter was 0.4 at 1400 or 1450℃. XRD analysis and thermodynamic calculation results showed that product containing chromium is appeared as FeCr2O4, Cr2O3, Cr7C3, [Cr]Fe-Cr-Ni-C in turn in the self-reduction process. Under 1450℃ reduction temperature, CCSB with 0.72 of xc/xo can not completely be reduced, but CCSB with 0.8 of xc/xo or more can completely be reduced under 1450℃, 20min.

Key words: stainless steel dust, hot briquette, self-reduction, volatile matter;chromium

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