Single taphole blast furnace tapping channel iron storing type improving technology

Abstract

The invention relates to a technical proposal in which the tapping runner of a single taphole blast furnace is transformed into an iron-storage iron runner to enable the iron runner to have long service life. The invention uses the method of elevating the taphole elevation of a skimmer and lowering a main runner, so that more hot metal is always stored in the main tapping runner, thereby buffering the impact of hot metal on the runner bottom and improving the application environment of refractory of the main runner. The invention solves the problem of the explosion-proof performance of runner iron castable, thus achieving the purpose that the tapping runner of the single taphole blast furnace uses refractory castable to substitute the traditional ramming material. Both the surface and the inner side of the runner lining made of castable are compact, so the problem that the surface of the ramming material is compact and the inner side is loose does not occur, so that the service life of the iron runner can be substantially prolonged, and the consumption of iron runner material of iron yield per unit is also reduced, which not only improves the economic benefits, but also has the advantages of resource conservation and waste slag reduction, and substantially reduces the labor intensity of the maintenance work of furnacemen.

Description

technical field [0001] The invention relates to the design and transformation technology of the long-life tapping trough of a single tapping hole blast furnace. Background technique [0002] High-quality Al2O3-SiC-C low-cement castables have been widely used in the tapping trough of modern large blast furnaces. Due to the high pouring density of castables, refractory castables are more resistant to erosion than refractory ramming materials of the same material, and thus have a longer service life. However, the iron trench poured by the traditional Al2O3-SiC-C low-cement refractory castable must be cured, hardened, baked and dried before it can be put into use. Long time (interval of 1 day or even several days). [0003] Generally, large blast furnaces have more than two tap channels, so when one of the iron channels must be relined or repaired, it is only necessary to block the tap hole of the iron channel and then pour, maintain and harden the iron channel , Bake and dry...

AI Technical Summary

Problems solved by technology

[0009] But so far, there is no process plan and practice for the single-tap furnace iron trough iron storage type iron trough, because if there is no suitable fast-hardening and non-baking iron trough castable for matching, it will not be possible to achieve subsequent rapid repair and maintenance. Maintenance, and the repair of this iron trench is necessary and continuous

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