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.
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 temperature,CCSB with 0. 72 of xc/ xocan not completely be reduced,but CCSB with 0. 8 of xc/ xoor more can completely be reduced under1 450 ℃,20 min.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第4期490-495,共6页
Journal of Northeastern University(Natural Science)
基金
中央高校基本科研业务费专项资金资助项目(N110202001)
关键词
不锈钢粉尘
热压块
自还原
挥发分
铬
stainless steel dust
hot briquette
self-reduction
volatile matter
chromium
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．
