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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN='8th ECIC & 9th ICSTI 2022':MAILTO:info@ecic-icsti.com
LOCATION:Room „Lloyd“
SUMMARY:Research and countermeasure on abnormal erosion of hearth lining in modern blast furnace
DESCRIPTION:In recent years, after the commissioning of many blast furnaces, there are frequent problems such as hearth lining temperature raising, local overheating, abnormal erosion and so on, even many hearth lining breakout accidents occurred. Based on the production practice and investigation of blast furnace, this paper analyzes and researches the abnormal damage of hearth lining, obtains the main reasons and mechanisms of abnormal erosion, and proposes some effective technical measures and approaches to prolong the campaign life of hearth. The shape, position and liquid permeability of dead coke column have important influence on melting slag and hot metal discharge. The hot metal circular flow is the main cause of abnormal erosion of hearth lining. It is concluded that the blast furnace design must follow the theory of reasonable temperature distribution, control the reasonable distribution of temperature field in the bottom and hearth, attach importance to the optimization of hearth lining structure design, and construct the dissipative structure system of blast furnace with self-organized characteristics. In blast furnace operation, must pay attention to the stability of hearth operation, keep the hearth with good performances of gas permeability and liquid permeability, and control the shape, position and structure of hearth dead coke column. Strengthen the melting slag and hot metal management of hearth, especially control the process of tapping, restrain the hot metal circular flow along the edge of the hearth side wall, control the temperature distribution of hearth side wall and bottom, and restrain the abnormal erosion of hearth side wall lining. Promote the maintenance and rehabilitation of hearth lining function, add the titanium compound to protect hearth lining reasonably, strengthen hearth cooling management, reinforce the monitoring and control of hearth lining temperature, etc. The effective technical measures to prolong the campaign life of modern blast furnace are put forward.
CLASS:PUBLIC
DTSTART:20220630T15-1500
DTEND:20220630T012500
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