A Method of Prolonging the Service Life of Blast Furnace Copper Stave

Abstract

The invention discloses a method for prolonging service life of a copper cooling wall of a blast furnace, which is used for effectively protecting the copper cooling wall of the blast furnace. The method comprises the following steps: a heat surface temperature calculating system of the copper cooling wall of the blast furnace can obtain the heat surface temperature of the copper cooling wall of the blast furnace; a heat surface slag cover thickness judging system of the copper cooling wall of the blast furnace can judge if a slag cover with a certain thickness needs to be quickly built for protecting the copper cooling wall; a refrigeration system of the copper cooling wall of the blast furnace forcedly cools the copper cooling wall of the blast furnace needing to be protected, so that the heat surface of the copper cooling wall quickly builds the effective slag cover; and a ventilation and purification device and a control system take charge of ventilation and heat dissipation of the whole system and liquefaction circulating process of a cooling medium. Compared with the prior art, the method relieves the contradictions of faster damage and difficult replacement of the copper cooling wall of the blast furnace in the prior art, and improves the furnace campaign of one generation of the blast furnace. The method can reduce the furnace cylinder temperature fluctuation of the blast furnace caused by abnormal falling of the slag cover of the copper cooling wall of the blast furnace, and guarantees long-time stable operation of the blast furnace.

Description

technical field [0001] The invention relates to blast furnace longevity technology, in particular to a method for prolonging the service life of a blast furnace copper stave, which belongs to the field of metallurgy. Background technique [0002] The energy consumption of the blast furnace process accounts for about 60% of the total energy consumption of the iron and steel industry. From the initial investment and construction of the blast furnace to the later smelting production, and then to the intermediate repair and overhaul during the period, the investment in blast furnace maintenance is huge. Therefore, iron and steel enterprises at home and abroad have tapped the potential of blast furnaces to maximize the benefits of blast furnaces by improving the utilization coefficient of blast furnaces and strengthening smelting. The service life of the blast furnace is greatly reduced, how to give full play to the production capacity of the blast furnace without reducing the l...

AI Technical Summary

Problems solved by technology

Since modern large-scale blast furnaces adopt the operating policy of "high utilization factor, low coke ratio, large coal injection, and long life", when the coal injection rate is close to 180kg / t, the bosh, furnace waist, and lower part of the furnace body become extremely high heat load areas, in the In the area where the soft melting zone is formed, it is scoured by high-temperature and high-speed gas flow, the heat flow intensity is large, and the temperature changes greatly. , High thermal shock areas, if there is no good slag skin protection, the service life of the copper stave will be greatly reduced, and thus cannot meet the requirements of continuous safe production of modern large blast furnaces

[0003] In the text of the patent "Intelligent Monitoring Method for Blast Furnace Staves" (public number CN 101319256A, publication date: December 10, 2008), the application object is cast iron staves of blast furnaces, and the core model of heat transfer is extracted by using nonlinear regression method, combined with the core model The detection model of the maximum temperature value of the hot surface of the stave is obtained with the artificial neural network and the monitoring software is formed. The main problem to be solved is to monitor the working status of the cast iron stave and ensure the safety of the cast iron stave. It does not involve the blast furnace copper stave and Blast Furnace Internal Profile Monitoring

[0004] In the text of the patent "A Method for Measuring the Lining of a Blast Furnace" (publication number CN 101275829A, published on October 1, 2008), the method for calculating the erosion thickness of the blast furnace hearth from the data detected by thermocouples is implemented in the lower part of the blast furnace cylinder area, and does not involve the monitoring of the thickness of the slag skin and the inner shape of the blast furnace in the high heat load area of ​​the blast furnace

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