MEng  >> Vol. 4 No. 2 (June 2017)

    回转窑处理钢铁厂含锌粉尘结圈机制的研究
    Study on the Mechanism of Ring Forming in Rotary Kiln of Zn-Bearing Dusts from Ironmaking and Steelmaking Process

  • 全文下载: PDF(3562KB) HTML   XML   PP.77-84   DOI: 10.12677/MEng.2017.42011  
  • 下载量: 712  浏览量: 1,729  

作者:  

殷磊明,周 云,李 阳:安徽工业大学冶金工程学院,安徽 马鞍山

关键词:
回转窑结圈矿相组成结圈机理抑制措施Rotary Kiln Ring Ore Phase Composition Mechanism of Knotting Suppression Measures

摘要:

针对回转窑处理含锌粉尘过程中的结圈问题,采用XRF、SEM和EDS等测试方法对窑中结圈物的化学组成和矿相组成进行分析,研究了窑中结圈物的形成机理。结果表明,结圈物的最主要的化学成分是铁和铁的氧化物,CaO、SiO2、Al2O3的含量也相对较高。内层结圈物以铁的浮氏体、钙长石为主,内层结圈以固相固结为主,液相粘结为辅。中层结圈物中液相的含量很高,铁的浮氏体和黄长石、尖晶石类物质次之。中层结圈主要是液相粘结造成的。粘结相主要是橄榄石类液相和铝酸盐类液相。外层结圈物以液相、铁的浮氏体和硅酸钙为主,主要是液相粘结,粘结相主要是金属铁液相和硅酸盐液相。导致结圈最主要的原因是煤灰的堆积和物料中各种氧化物反应形成的低熔点化合物在窑中高温的作用下形成了液相,在此基础上,提出了抑制窑内结圈的措施。

The study focuses on ring formation of rotary kiln in the process of treating Zn-bearing dusts from ironmaking and steelmaking process. The chemical composition and phase composition of the ring were analyzed using XRF, SEM and EDS. The results show that the ring consists of iron and iron oxides, and have relative high contents of CaO, SiO2, and Al2O3. The internal layer is mainly composed of iron wustite and calciclase, and mainly caused by solid phase sintering, complemented liquid phase bonding. The middle layer contains much liquid phase, and some iron wustite, the melilite and the spinel. The outer layer is mainly composed of liquid phase, iron wustite and calcium silicate. It is mainly caused by liquid phase bonding. The bond phase is predominantly liquid metallic iron and silicate liquid phase with low melting point. Based on the above results, proposing the following formation mechanism of ring: the accumulation of coal ash and the various oxides in the material form a low melting point compounds in the kiln, in turn the liquid and solid particle form high viscosity fluids adhere to the wall of rotary kiln. On the basis of the results, the measures to suppress the knot in the kiln are put forward.

文章引用:
殷磊明, 周云, 李阳. 回转窑处理钢铁厂含锌粉尘结圈机制的研究[J]. 冶金工程, 2017, 4(2): 77-84. https://doi.org/10.12677/MEng.2017.42011

参考文献

[1] 傅菊英, 白国华, 王培忠, 高岩, 等. 鞍钢弓矿链篦机——回转窑结圈研究[J]. 球团技术, 2004(3): 2-6.
[2] 张鑫, 丁跃华, 罗志俊, 宁哲. 攀钢瓦斯泥脱锌还原工艺研究[J]. 云南冶金, 2008, 37(3): 32-36.
[3] 高岩. 鞍钢弓矿链篦机——回转窑氧化球团生产实践[J]. 球团技术, 2004(4): 8-14.
[4] 范晓慧, 甘敏, 等. 氧化球团链篦机——回转窑结圈机理的研究[J]. 钢铁, 2008, 43(3): 15-20.
[5] 司金凤, 贾彦忠, 等. 回转窑结圈物结构及结圈机制[J]. 钢铁, 2014, 49(1): 17-21.
[6] 张国成. 包钢氧化球团回转窑结圈研究[D]: [硕士学位论文]. 包头: 内蒙古科技大学, 2014.
[7] 李建华, 成富全, 李文明, 段海瑞. 回转窑结圈原因分析及预防措施[C]//中国金属学会. 2010年全国炼铁生产技术会议暨炼铁年会论文集. 北京: 中国金属学会, 2010.
[8] 郭光新, 柳瑞民. 有关直接还原回转窑结圈的机理及其防止的论述[J]. 四川冶金, 1989, 2(2): 15-21.
[9] 黄柱成. 回转窑结圈物的形成机理[J]. 直接还原铁论坛, 2015, 1(2): 26-35.
[10] 周祖康, 顾惕人, 马季铭. 胶体化学基础[M]. 北京: 北京大学出版社, 1987: 220-223.
[11] 马福辉, 杨晓源, 等. 昆钢球团回转窑结圈研究与预防[J]. 烧结球团, 2006, 31(5): 19-22.