Liner making technique for casting lander of blast furnace with single iron notch, and free from baking casting material for iron notch

Abstract

This invention relates to a bake-free casting material and method for casting the lining of iron runner in a blast furnace. The method comprises: cleaning residues at the bottom of the iron runner of a blast furnace, supplying a mold, stirring the bake-free casting material slurry, pouring into the mold, tamping with an insertion-type vibration stick to discharge bubbles and obtain compact casting material. The casting material is suitable for casting the lining of iron runner in a 1000 m3 or lower blast furnace with a single iron outlet, and the obtained lining of iron runner can be directly used for discharging molten iron after hardened without being baked. By the method, the lining of iron runner has compact surface and inside, so the iron runner has a long service life. The method has such advantages as low material consumption, low cost, few waste residues and low labor intensity.

Description

technical field [0001] The invention relates to a lining process for a single taphole blast furnace tapping trough and materials used for the lining. Background technique [0002] High-quality A1203-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 traditional A1203-SiC-C low-cement refractory castable castable iron trench 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. At the same t...

AI Technical Summary

Problems solved by technology

But so far, there is no baking-free castable suitable for lining or repairing the iron trench, and there is n

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