Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Iron & Steel》 2017-12
Add to Favorite Get Latest Update

Comprehensive regulation technology for hearth protective layer of blast furnace longevity

ZHANG Jian-liang;JIAO Ke-xin;LIU Zheng-jian;YANG Tian-jun;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing;State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing;  
A stable protective layer forming in brick heating surface of blast furnace hearth,which avoided direct contact by seperating molten iron with brick,was a necessary condition to keep the longevity of hearth and delay the corrosion of brick. In order to study the essence of blast furnace hearth longevity. Firstly,class system of blast furnace hearth protective layer was established through blast furnace damage surveys and dissection research,and also by analyzing hearth protective layer phase composition and microstructure. Protective layer was classified as iron-rich layer,slag-rich layer,graphite-rich layer and titanium-rich layer according to the formation mechanism of protective layer. Secondly,the technical design of comprehensive regulation of the blast furnace hearth protective layer was formulated. And it was also proposed that reasonable control of the hearth refractories heating surface temperature and hot metal composition was the key to form hearth protective layer. The strength of the formation ability of hearth protective layer decreased from titanium-rich layer and graphite-rich layer toiron-rich layer.At last,it was clear that the measures of design,control of hot metal and production oprations should be taken to promote the formatin of graphite-rich layer during blast furnace production.
【Fund】: 国家自然科学青年基金资助项目(51704019)
【CateGory Index】: TF573.1
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved