摘要
中位粒径1.78μm的不锈钢粉尘的成分为(%):41.0Fe、3.3Ni、24.8O、2.6Cr、4.1Ca、3.6Zn,其主要相组成为Fe_3O_4、FeO·Cr_2O_3、CrO。研究了气固比(1.6～4.0 L/g)、还原时间(50～300 s)、H_2-CO混合气体中CO的含量(20%～60%)和温度(500～700℃)对不锈钢粉尘还原的影响。正交试验结果表明,四个因素中气固比影响最为显著,其余依次为还原混合气体成分、还原时间和反应温度。气固比4.0 L/g,600～700℃,CO含量15%～25%,5 min内不锈钢粉尘的还原率可达50%。
Main analysis of stainless steel dust with intermediate size 1.78μm is （% ： ） 41. OFe, 3.3Ni, 24. 80, 2. 6Cr, 4. 1Ca, 3.6Zn, of which the main mineralogy is Fe304 , FeO · Cr2O3 and CrO. The effect of gas-solid ratio （1.6 - 4. 0 L/g） , reduction time （50 -300 s） , CO fraction in H2-CO mix gas （20% -60% ） and temperature （500 -700 ℃ ） on reduction rate of stainless steel oxides has been studied. Orthogonal test results show that the gas-solid ratio has most ob- vious effect in four factors, following in sequence being reduction mix gas ingredient, reduction time and reaction tempera- ture. The reduction rate of stainless steel dust is up to 50% in 5 min with gas-solid ration 4. 0 L/g, CO fraction 15% - 25 % at 600 - 700 ℃.
出处
《特殊钢》
北大核心
2010年第4期7-10,共4页
Special Steel
基金
国家自然科学基金项目资助(50634040)
关键词
不锈钢粉尘
中低温
H2-CO
还原率
Stainless Steel Dust, Intermediate and Low Temperature, H2-C0 Gas, Reduction Ratio
