基于热压块的不锈钢粉尘还原实验

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35 MPa条件下,抗压强度达到900 N/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1 400,1 450℃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Fe Cr2O4,Cr2O3,Cr7C3,[Cr]Fe-Cr-Ni-C.当还原温度为1 450℃,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20 min...

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Published in东北大学学报：自然科学版 Vol. 37; no. 4; pp. 490 - 495
Main Author 李晰哲 储满生 李花兵 罗主现
Format Journal Article
LanguageChinese
Published 2016
Subjects
不锈钢粉尘
挥发分
热压块
自还原
铬
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Summary: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35 MPa条件下,抗压强度达到900 N/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1 400,1 450℃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Fe Cr2O4,Cr2O3,Cr7C3,[Cr]Fe-Cr-Ni-C.当还原温度为1 450℃,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20 min时,不锈钢粉尘热压块能完全还原.
Bibliography:21-1344/T
stainless steel dust; hot briquette; self-reduction; volatile matter; chromium
RI Sok-chol;CHU Man-sheng;LI Hua-bing;RA Ju-hyon; （1. School of Metallurgy, Northeastern University, Shenyang 110819, China; 2. School of Metallurgical Engineering, Kim Chaek University of Technology, Pyongyang 999093, DPRK.）
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,35 MPa hot briquetting pressure,the compressive strength was above 900 N / 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 1 400 or 1 450 ℃. XRD analysis and thermodynamic calculation results showed that product containing chromium is appeared as Fe Cr2O4,Cr2O3,Cr7C3,[Cr]Fe-Cr-Ni-Cin turn in the self-reduction process. Under 1 450 ℃ reduction temperatur
ISSN:1005-3026