Method for replacing bottom of blast furnace

Abstract

The invention discloses a method for replacing bottom of blast furnace, which can shorten the construction period of replacing bottom of blast furnace; the method mainly comprise: firstly dividing the blast furnace above the furnace base into a furnace bottom and an upper furnace body; then lifting the upper furnace body and fixing; then removing the furnace bottom on the furnace base; then determining a theoretical center point of the furnace bottom on the furnace base and the theoretical elevation of the furnace bottom; then according to the theoretical center point of the furnace bottom and the theoretical elevation of the furnace bottom, installing a new furnace bottom on the furnace base; finally, dropping the upper furnace body and connecting with the new furnace bottom on the furnace base. Because the upper furnace body is not removed, so the construction period of replacing bottom of blast furnace can be obviously shortened, which can improve the production efficiency. Besides, the upper furnace body can be lifted by a hydraulic cylinder, then the construction period of replacing bottom of blast furnace can be further shortened.

Description

technical field [0001] The invention relates to a blast furnace bottom replacement method applied in the blast furnace overhaul process. Background technique [0002] For the overhaul of blast furnaces with serious damage to the bottom of the furnace, in the prior art, there are two general methods for replacing the bottom of the blast furnace: one is the sawing method, that is, cutting and replacing a certain part of the foundation below the bottom of the furnace to facilitate the installation of the traction bottom Slide rails or rolling parts are used to cut the furnace shell on the upper surface of the residual cured material in the furnace, and the furnace shell above the cut surface of the furnace shell is fixed by steel structure welding or suspended by steel ropes. The main problems of this method are: the sawing equipment and the slide rail traverse mechanism are relatively complicated, the investment is large, and it is difficult to operate in the limited space of ...

AI Technical Summary

Problems solved by technology

The main problems of this method are: the sawing equipment and the slide rail traverse mechanism used are relatively complicated, the investment is large, and it is difficult to operate in the limited space of the blast furnace bottom; the foundation of the furnace bottom must be repaired if it is damaged; The quantity is large, the sawing method is adopted, the discharge speed of the slide rail is slow, and the construction period is long; because the upper furnace body is fixed, when restoring the furnace bottom and cutting off part of the furnace shell, there is no hoisting space when installing and restoring, so it can only be inlaid, and the construction is more difficult

This method also has the disadvantages of long construction period, large project investment, complicated process and high cost.

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