（1. School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083 China 2. State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 100083， China）
Abstract：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.
收稿日期: 2017-05-02
出版日期: 2017-12-21
引用本文:
张建良，焦克新，刘征建，杨天钧，. 长寿高炉炉缸保护层综合调控技术[J]. , 2017, 52(12): 1-7.
ZHANG Jian-liang，，JIAO Ke-xin，，LIU Zheng-jian，，YANG Tian-jun，. Comprehensive regulation technology for hearth protective layer of blast furnace longevity. Iron and Steel, 2017, 52(12): 1-7.
Shinotake A，Nakamura H，Yadoumaru N，Morizane Y，Meguro M．Investigation of Blast-furnace Hearth Sidewall Erosion by Core Sample Analysis and Consideration of Campaign Operation[J]．ISIJ International，2003，43(3)：321-330．
[5]
Shinotake A，Nakamura H，Yadoumaru N，Morizane Y，Meguro M．Investigation of Blast-furnace Hearth Sidewall Erosion by Core Sample Analysis and Consideration of Campaign Operation[J]．ISIJ International，2003，43(3)：321-330．
[6]
Jiao K X，Zhang J L，Liu Z J，Chen C L，Liu Y X．Analysis of Blast furnace Hearth Sidewall Erosion and Protective Layer Formation[J]．ISIJ International，2016，56(11)：1956-1963．
[6]
Jiao K X，Zhang J L，Liu Z J，Chen C L，Liu Y X．Analysis of Blast furnace Hearth Sidewall Erosion and Protective Layer Formation[J]．ISIJ International，2016，56(11)：1956-1963．
Liu Z J，Zhang J L，Zuo H B，Yang T J．Recent Progress on Long Service Life Design of Chinese Blast Furnace Hearth[J]．ISIJ International，2012，52(10)：1713-1723．
[8]
Liu Z J，Zhang J L，Zuo H B，Yang T J．Recent Progress on Long Service Life Design of Chinese Blast Furnace Hearth[J]．ISIJ International，2012，52(10)：1713-1723．
[9]
Jiao K X，Zhang J L，Liu Z J，Liu F．Dissection Investigation of Ti(C,N) Behavior in Blast Furnace Hearth during Vanadium Titano-magnetite Smelting[J]．ISIJ International，2017，57(01)：48-54．
[9]
Jiao K X，Zhang J L，Liu Z J，Liu F．Dissection Investigation of Ti(C,N) Behavior in Blast Furnace Hearth during Vanadium Titano-magnetite Smelting[J]．ISIJ International，2017，57(01)：48-54．
[10]
Jiao K X，Zhang J L，Liu Z J，Xu M，Liu F．Formation Mechanism of the Protective Layer in a Blast Furnace Hearth[J]．International Journal of Minerals Metallurgy and Materials．2015，22(10)：1017-1024．
[10]
Jiao K X，Zhang J L，Liu Z J，Xu M，Liu F．Formation Mechanism of the Protective Layer in a Blast Furnace Hearth[J]．International Journal of Minerals Metallurgy and Materials．2015，22(10)：1017-1024．
2017, Vol. 52 
